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Commit 5e0e61dd authored by Ralf Baechle's avatar Ralf Baechle
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Merge branch 'next/kvm' into mips-for-linux-next

parents 9b3539e0 50c83085
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Showing with 7412 additions and 18 deletions
arch/mips/Kbuild
View file @ 5e0e61dd
......@@ -17,3 +17,7 @@ obj- := $(platform-)
obj-y += kernel/
obj-y += mm/
obj-y += math-emu/
ifdef CONFIG_KVM
obj-y += kvm/
endif
arch/mips/Kconfig
View file @ 5e0e61dd
......@@ -1234,6 +1234,7 @@ config CPU_MIPS32_R2
select CPU_HAS_PREFETCH
select CPU_SUPPORTS_32BIT_KERNEL
select CPU_SUPPORTS_HIGHMEM
select HAVE_KVM
help
Choose this option to build a kernel for release 2 or later of the
MIPS32 architecture. Most modern embedded systems with a 32-bit
......@@ -1734,6 +1735,20 @@ config 64BIT
endchoice
config KVM_GUEST
bool "KVM Guest Kernel"
help
Select this option if building a guest kernel for KVM (Trap & Emulate) mode
config KVM_HOST_FREQ
int "KVM Host Processor Frequency (MHz)"
depends on KVM_GUEST
default 500
help
Select this option if building a guest kernel for KVM to skip
RTC emulation when determining guest CPU Frequency. Instead, the guest
processor frequency is automatically derived from the host frequency.
choice
prompt "Kernel page size"
default PAGE_SIZE_4KB
......@@ -2014,6 +2029,7 @@ config SB1_PASS_2_1_WORKAROUNDS
depends on CPU_SB1 && CPU_SB1_PASS_2
default y
config 64BIT_PHYS_ADDR
bool
......@@ -2547,3 +2563,5 @@ source "security/Kconfig"
source "crypto/Kconfig"
source "lib/Kconfig"
source "arch/mips/kvm/Kconfig"
arch/mips/configs/malta_kvm_defconfig 0 → 100644
View file @ 5e0e61dd
CONFIG_MIPS_MALTA=y
CONFIG_CPU_LITTLE_ENDIAN=y
CONFIG_CPU_MIPS32_R2=y
CONFIG_PAGE_SIZE_16KB=y
CONFIG_MIPS_MT_SMP=y
CONFIG_HZ_100=y
CONFIG_SYSVIPC=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_LOG_BUF_SHIFT=15
CONFIG_NAMESPACES=y
CONFIG_RELAY=y
CONFIG_EXPERT=y
CONFIG_PERF_EVENTS=y
# CONFIG_COMPAT_BRK is not set
CONFIG_SLAB=y
CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y
CONFIG_MODVERSIONS=y
CONFIG_MODULE_SRCVERSION_ALL=y
CONFIG_PCI=y
CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_XFRM_USER=m
CONFIG_NET_KEY=y
CONFIG_NET_KEY_MIGRATE=y
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
CONFIG_IP_ADVANCED_ROUTER=y
CONFIG_IP_MULTIPLE_TABLES=y
CONFIG_IP_ROUTE_MULTIPATH=y
CONFIG_IP_ROUTE_VERBOSE=y
CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
CONFIG_IP_PNP_BOOTP=y
CONFIG_NET_IPIP=m
CONFIG_IP_MROUTE=y
CONFIG_IP_PIMSM_V1=y
CONFIG_IP_PIMSM_V2=y
CONFIG_SYN_COOKIES=y
CONFIG_INET_AH=m
CONFIG_INET_ESP=m
CONFIG_INET_IPCOMP=m
CONFIG_INET_XFRM_MODE_TRANSPORT=m
CONFIG_INET_XFRM_MODE_TUNNEL=m
CONFIG_TCP_MD5SIG=y
CONFIG_IPV6_PRIVACY=y
CONFIG_IPV6_ROUTER_PREF=y
CONFIG_IPV6_ROUTE_INFO=y
CONFIG_IPV6_OPTIMISTIC_DAD=y
CONFIG_INET6_AH=m
CONFIG_INET6_ESP=m
CONFIG_INET6_IPCOMP=m
CONFIG_IPV6_TUNNEL=m
CONFIG_IPV6_MROUTE=y
CONFIG_IPV6_PIMSM_V2=y
CONFIG_NETWORK_SECMARK=y
CONFIG_NETFILTER=y
CONFIG_NF_CONNTRACK=m
CONFIG_NF_CONNTRACK_SECMARK=y
CONFIG_NF_CONNTRACK_EVENTS=y
CONFIG_NF_CT_PROTO_DCCP=m
CONFIG_NF_CT_PROTO_UDPLITE=m
CONFIG_NF_CONNTRACK_AMANDA=m
CONFIG_NF_CONNTRACK_FTP=m
CONFIG_NF_CONNTRACK_H323=m
CONFIG_NF_CONNTRACK_IRC=m
CONFIG_NF_CONNTRACK_PPTP=m
CONFIG_NF_CONNTRACK_SANE=m
CONFIG_NF_CONNTRACK_SIP=m
CONFIG_NF_CONNTRACK_TFTP=m
CONFIG_NF_CT_NETLINK=m
CONFIG_NETFILTER_TPROXY=m
CONFIG_NETFILTER_XT_TARGET_CLASSIFY=m
CONFIG_NETFILTER_XT_TARGET_CONNMARK=m
CONFIG_NETFILTER_XT_TARGET_MARK=m
CONFIG_NETFILTER_XT_TARGET_NFLOG=m
CONFIG_NETFILTER_XT_TARGET_NFQUEUE=m
CONFIG_NETFILTER_XT_TARGET_TPROXY=m
CONFIG_NETFILTER_XT_TARGET_TRACE=m
CONFIG_NETFILTER_XT_TARGET_SECMARK=m
CONFIG_NETFILTER_XT_TARGET_TCPMSS=m
CONFIG_NETFILTER_XT_TARGET_TCPOPTSTRIP=m
CONFIG_NETFILTER_XT_MATCH_COMMENT=m
CONFIG_NETFILTER_XT_MATCH_CONNBYTES=m
CONFIG_NETFILTER_XT_MATCH_CONNLIMIT=m
CONFIG_NETFILTER_XT_MATCH_CONNMARK=m
CONFIG_NETFILTER_XT_MATCH_CONNTRACK=m
CONFIG_NETFILTER_XT_MATCH_DCCP=m
CONFIG_NETFILTER_XT_MATCH_ESP=m
CONFIG_NETFILTER_XT_MATCH_HASHLIMIT=m
CONFIG_NETFILTER_XT_MATCH_HELPER=m
CONFIG_NETFILTER_XT_MATCH_IPRANGE=m
CONFIG_NETFILTER_XT_MATCH_LENGTH=m
CONFIG_NETFILTER_XT_MATCH_LIMIT=m
CONFIG_NETFILTER_XT_MATCH_MAC=m
CONFIG_NETFILTER_XT_MATCH_MARK=m
CONFIG_NETFILTER_XT_MATCH_MULTIPORT=m
CONFIG_NETFILTER_XT_MATCH_OWNER=m
CONFIG_NETFILTER_XT_MATCH_POLICY=m
CONFIG_NETFILTER_XT_MATCH_PKTTYPE=m
CONFIG_NETFILTER_XT_MATCH_QUOTA=m
CONFIG_NETFILTER_XT_MATCH_RATEEST=m
CONFIG_NETFILTER_XT_MATCH_REALM=m
CONFIG_NETFILTER_XT_MATCH_RECENT=m
CONFIG_NETFILTER_XT_MATCH_SOCKET=m
CONFIG_NETFILTER_XT_MATCH_STATE=m
CONFIG_NETFILTER_XT_MATCH_STATISTIC=m
CONFIG_NETFILTER_XT_MATCH_STRING=m
CONFIG_NETFILTER_XT_MATCH_TCPMSS=m
CONFIG_NETFILTER_XT_MATCH_TIME=m
CONFIG_NETFILTER_XT_MATCH_U32=m
CONFIG_IP_VS=m
CONFIG_IP_VS_IPV6=y
CONFIG_IP_VS_PROTO_TCP=y
CONFIG_IP_VS_PROTO_UDP=y
CONFIG_IP_VS_PROTO_ESP=y
CONFIG_IP_VS_PROTO_AH=y
CONFIG_IP_VS_RR=m
CONFIG_IP_VS_WRR=m
CONFIG_IP_VS_LC=m
CONFIG_IP_VS_WLC=m
CONFIG_IP_VS_LBLC=m
CONFIG_IP_VS_LBLCR=m
CONFIG_IP_VS_DH=m
CONFIG_IP_VS_SH=m
CONFIG_IP_VS_SED=m
CONFIG_IP_VS_NQ=m
CONFIG_NF_CONNTRACK_IPV4=m
CONFIG_IP_NF_QUEUE=m
CONFIG_IP_NF_IPTABLES=m
CONFIG_IP_NF_MATCH_AH=m
CONFIG_IP_NF_MATCH_ECN=m
CONFIG_IP_NF_MATCH_TTL=m
CONFIG_IP_NF_FILTER=m
CONFIG_IP_NF_TARGET_REJECT=m
CONFIG_IP_NF_TARGET_ULOG=m
CONFIG_IP_NF_MANGLE=m
CONFIG_IP_NF_TARGET_CLUSTERIP=m
CONFIG_IP_NF_TARGET_ECN=m
CONFIG_IP_NF_TARGET_TTL=m
CONFIG_IP_NF_RAW=m
CONFIG_IP_NF_ARPTABLES=m
CONFIG_IP_NF_ARPFILTER=m
CONFIG_IP_NF_ARP_MANGLE=m
CONFIG_NF_CONNTRACK_IPV6=m
CONFIG_IP6_NF_MATCH_AH=m
CONFIG_IP6_NF_MATCH_EUI64=m
CONFIG_IP6_NF_MATCH_FRAG=m
CONFIG_IP6_NF_MATCH_OPTS=m
CONFIG_IP6_NF_MATCH_HL=m
CONFIG_IP6_NF_MATCH_IPV6HEADER=m
CONFIG_IP6_NF_MATCH_MH=m
CONFIG_IP6_NF_MATCH_RT=m
CONFIG_IP6_NF_TARGET_HL=m
CONFIG_IP6_NF_FILTER=m
CONFIG_IP6_NF_TARGET_REJECT=m
CONFIG_IP6_NF_MANGLE=m
CONFIG_IP6_NF_RAW=m
CONFIG_BRIDGE_NF_EBTABLES=m
CONFIG_BRIDGE_EBT_BROUTE=m
CONFIG_BRIDGE_EBT_T_FILTER=m
CONFIG_BRIDGE_EBT_T_NAT=m
CONFIG_BRIDGE_EBT_802_3=m
CONFIG_BRIDGE_EBT_AMONG=m
CONFIG_BRIDGE_EBT_ARP=m
CONFIG_BRIDGE_EBT_IP=m
CONFIG_BRIDGE_EBT_IP6=m
CONFIG_BRIDGE_EBT_LIMIT=m
CONFIG_BRIDGE_EBT_MARK=m
CONFIG_BRIDGE_EBT_PKTTYPE=m
CONFIG_BRIDGE_EBT_STP=m
CONFIG_BRIDGE_EBT_VLAN=m
CONFIG_BRIDGE_EBT_ARPREPLY=m
CONFIG_BRIDGE_EBT_DNAT=m
CONFIG_BRIDGE_EBT_MARK_T=m
CONFIG_BRIDGE_EBT_REDIRECT=m
CONFIG_BRIDGE_EBT_SNAT=m
CONFIG_BRIDGE_EBT_LOG=m
CONFIG_BRIDGE_EBT_ULOG=m
CONFIG_BRIDGE_EBT_NFLOG=m
CONFIG_IP_SCTP=m
CONFIG_BRIDGE=m
CONFIG_VLAN_8021Q=m
CONFIG_VLAN_8021Q_GVRP=y
CONFIG_ATALK=m
CONFIG_DEV_APPLETALK=m
CONFIG_IPDDP=m
CONFIG_IPDDP_ENCAP=y
CONFIG_IPDDP_DECAP=y
CONFIG_PHONET=m
CONFIG_NET_SCHED=y
CONFIG_NET_SCH_CBQ=m
CONFIG_NET_SCH_HTB=m
CONFIG_NET_SCH_HFSC=m
CONFIG_NET_SCH_PRIO=m
CONFIG_NET_SCH_RED=m
CONFIG_NET_SCH_SFQ=m
CONFIG_NET_SCH_TEQL=m
CONFIG_NET_SCH_TBF=m
CONFIG_NET_SCH_GRED=m
CONFIG_NET_SCH_DSMARK=m
CONFIG_NET_SCH_NETEM=m
CONFIG_NET_SCH_INGRESS=m
CONFIG_NET_CLS_BASIC=m
CONFIG_NET_CLS_TCINDEX=m
CONFIG_NET_CLS_ROUTE4=m
CONFIG_NET_CLS_FW=m
CONFIG_NET_CLS_U32=m
CONFIG_NET_CLS_RSVP=m
CONFIG_NET_CLS_RSVP6=m
CONFIG_NET_CLS_FLOW=m
CONFIG_NET_CLS_ACT=y
CONFIG_NET_ACT_POLICE=y
CONFIG_NET_ACT_GACT=m
CONFIG_GACT_PROB=y
CONFIG_NET_ACT_MIRRED=m
CONFIG_NET_ACT_IPT=m
CONFIG_NET_ACT_NAT=m
CONFIG_NET_ACT_PEDIT=m
CONFIG_NET_ACT_SIMP=m
CONFIG_NET_ACT_SKBEDIT=m
CONFIG_NET_CLS_IND=y
CONFIG_CFG80211=m
CONFIG_MAC80211=m
CONFIG_MAC80211_RC_PID=y
CONFIG_MAC80211_RC_DEFAULT_PID=y
CONFIG_MAC80211_MESH=y
CONFIG_RFKILL=m
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
CONFIG_CONNECTOR=m
CONFIG_MTD=y
CONFIG_MTD_CHAR=y
CONFIG_MTD_BLOCK=y
CONFIG_MTD_OOPS=m
CONFIG_MTD_CFI=y
CONFIG_MTD_CFI_INTELEXT=y
CONFIG_MTD_CFI_AMDSTD=y
CONFIG_MTD_CFI_STAA=y
CONFIG_MTD_PHYSMAP=y
CONFIG_MTD_UBI=m
CONFIG_MTD_UBI_GLUEBI=m
CONFIG_BLK_DEV_FD=m
CONFIG_BLK_DEV_UMEM=m
CONFIG_BLK_DEV_LOOP=m
CONFIG_BLK_DEV_CRYPTOLOOP=m
CONFIG_BLK_DEV_NBD=m
CONFIG_BLK_DEV_RAM=y
CONFIG_CDROM_PKTCDVD=m
CONFIG_ATA_OVER_ETH=m
CONFIG_IDE=y
CONFIG_BLK_DEV_IDECD=y
CONFIG_IDE_GENERIC=y
CONFIG_BLK_DEV_GENERIC=y
CONFIG_BLK_DEV_PIIX=y
CONFIG_BLK_DEV_IT8213=m
CONFIG_BLK_DEV_TC86C001=m
CONFIG_RAID_ATTRS=m
CONFIG_SCSI=m
CONFIG_SCSI_TGT=m
CONFIG_BLK_DEV_SD=m
CONFIG_CHR_DEV_ST=m
CONFIG_CHR_DEV_OSST=m
CONFIG_BLK_DEV_SR=m
CONFIG_BLK_DEV_SR_VENDOR=y
CONFIG_CHR_DEV_SG=m
CONFIG_SCSI_MULTI_LUN=y
CONFIG_SCSI_CONSTANTS=y
CONFIG_SCSI_LOGGING=y
CONFIG_SCSI_SCAN_ASYNC=y
CONFIG_SCSI_FC_ATTRS=m
CONFIG_ISCSI_TCP=m
CONFIG_BLK_DEV_3W_XXXX_RAID=m
CONFIG_SCSI_3W_9XXX=m
CONFIG_SCSI_ACARD=m
CONFIG_SCSI_AACRAID=m
CONFIG_SCSI_AIC7XXX=m
CONFIG_AIC7XXX_RESET_DELAY_MS=15000
# CONFIG_AIC7XXX_DEBUG_ENABLE is not set
CONFIG_MD=y
CONFIG_BLK_DEV_MD=m
CONFIG_MD_LINEAR=m
CONFIG_MD_RAID0=m
CONFIG_MD_RAID1=m
CONFIG_MD_RAID10=m
CONFIG_MD_RAID456=m
CONFIG_MD_MULTIPATH=m
CONFIG_MD_FAULTY=m
CONFIG_BLK_DEV_DM=m
CONFIG_DM_CRYPT=m
CONFIG_DM_SNAPSHOT=m
CONFIG_DM_MIRROR=m
CONFIG_DM_ZERO=m
CONFIG_DM_MULTIPATH=m
CONFIG_NETDEVICES=y
CONFIG_BONDING=m
CONFIG_DUMMY=m
CONFIG_EQUALIZER=m
CONFIG_IFB=m
CONFIG_MACVLAN=m
CONFIG_TUN=m
CONFIG_VETH=m
CONFIG_PCNET32=y
CONFIG_CHELSIO_T3=m
CONFIG_AX88796=m
CONFIG_NETXEN_NIC=m
CONFIG_TC35815=m
CONFIG_MARVELL_PHY=m
CONFIG_DAVICOM_PHY=m
CONFIG_QSEMI_PHY=m
CONFIG_LXT_PHY=m
CONFIG_CICADA_PHY=m
CONFIG_VITESSE_PHY=m
CONFIG_SMSC_PHY=m
CONFIG_BROADCOM_PHY=m
CONFIG_ICPLUS_PHY=m
CONFIG_REALTEK_PHY=m
CONFIG_ATMEL=m
CONFIG_PCI_ATMEL=m
CONFIG_PRISM54=m
CONFIG_HOSTAP=m
CONFIG_HOSTAP_FIRMWARE=y
CONFIG_HOSTAP_FIRMWARE_NVRAM=y
CONFIG_HOSTAP_PLX=m
CONFIG_HOSTAP_PCI=m
CONFIG_IPW2100=m
CONFIG_IPW2100_MONITOR=y
CONFIG_LIBERTAS=m
# CONFIG_INPUT_KEYBOARD is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_SERIO_I8042 is not set
CONFIG_VT_HW_CONSOLE_BINDING=y
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
# CONFIG_HWMON is not set
CONFIG_FB=y
CONFIG_FB_CIRRUS=y
# CONFIG_VGA_CONSOLE is not set
CONFIG_FRAMEBUFFER_CONSOLE=y
CONFIG_HID=m
CONFIG_RTC_CLASS=y
CONFIG_RTC_DRV_CMOS=y
CONFIG_UIO=m
CONFIG_UIO_CIF=m
CONFIG_EXT2_FS=y
CONFIG_EXT3_FS=y
CONFIG_REISERFS_FS=m
CONFIG_REISERFS_PROC_INFO=y
CONFIG_REISERFS_FS_XATTR=y
CONFIG_REISERFS_FS_POSIX_ACL=y
CONFIG_REISERFS_FS_SECURITY=y
CONFIG_JFS_FS=m
CONFIG_JFS_POSIX_ACL=y
CONFIG_JFS_SECURITY=y
CONFIG_XFS_FS=m
CONFIG_XFS_QUOTA=y
CONFIG_XFS_POSIX_ACL=y
CONFIG_QUOTA=y
CONFIG_QFMT_V2=y
CONFIG_FUSE_FS=m
CONFIG_ISO9660_FS=m
CONFIG_JOLIET=y
CONFIG_ZISOFS=y
CONFIG_UDF_FS=m
CONFIG_MSDOS_FS=m
CONFIG_VFAT_FS=m
CONFIG_PROC_KCORE=y
CONFIG_TMPFS=y
CONFIG_CONFIGFS_FS=y
CONFIG_AFFS_FS=m
CONFIG_HFS_FS=m
CONFIG_HFSPLUS_FS=m
CONFIG_BEFS_FS=m
CONFIG_BFS_FS=m
CONFIG_EFS_FS=m
CONFIG_JFFS2_FS=m
CONFIG_JFFS2_FS_XATTR=y
CONFIG_JFFS2_COMPRESSION_OPTIONS=y
CONFIG_JFFS2_RUBIN=y
CONFIG_CRAMFS=m
CONFIG_VXFS_FS=m
CONFIG_MINIX_FS=m
CONFIG_ROMFS_FS=m
CONFIG_SYSV_FS=m
CONFIG_UFS_FS=m
CONFIG_NFS_FS=y
CONFIG_ROOT_NFS=y
CONFIG_NFSD=y
CONFIG_NFSD_V3=y
CONFIG_NLS_CODEPAGE_437=m
CONFIG_NLS_CODEPAGE_737=m
CONFIG_NLS_CODEPAGE_775=m
CONFIG_NLS_CODEPAGE_850=m
CONFIG_NLS_CODEPAGE_852=m
CONFIG_NLS_CODEPAGE_855=m
CONFIG_NLS_CODEPAGE_857=m
CONFIG_NLS_CODEPAGE_860=m
CONFIG_NLS_CODEPAGE_861=m
CONFIG_NLS_CODEPAGE_862=m
CONFIG_NLS_CODEPAGE_863=m
CONFIG_NLS_CODEPAGE_864=m
CONFIG_NLS_CODEPAGE_865=m
CONFIG_NLS_CODEPAGE_866=m
CONFIG_NLS_CODEPAGE_869=m
CONFIG_NLS_CODEPAGE_936=m
CONFIG_NLS_CODEPAGE_950=m
CONFIG_NLS_CODEPAGE_932=m
CONFIG_NLS_CODEPAGE_949=m
CONFIG_NLS_CODEPAGE_874=m
CONFIG_NLS_ISO8859_8=m
CONFIG_NLS_CODEPAGE_1250=m
CONFIG_NLS_CODEPAGE_1251=m
CONFIG_NLS_ASCII=m
CONFIG_NLS_ISO8859_1=m
CONFIG_NLS_ISO8859_2=m
CONFIG_NLS_ISO8859_3=m
CONFIG_NLS_ISO8859_4=m
CONFIG_NLS_ISO8859_5=m
CONFIG_NLS_ISO8859_6=m
CONFIG_NLS_ISO8859_7=m
CONFIG_NLS_ISO8859_9=m
CONFIG_NLS_ISO8859_13=m
CONFIG_NLS_ISO8859_14=m
CONFIG_NLS_ISO8859_15=m
CONFIG_NLS_KOI8_R=m
CONFIG_NLS_KOI8_U=m
CONFIG_RCU_CPU_STALL_TIMEOUT=60
CONFIG_ENABLE_DEFAULT_TRACERS=y
CONFIG_CRYPTO_NULL=m
CONFIG_CRYPTO_CRYPTD=m
CONFIG_CRYPTO_LRW=m
CONFIG_CRYPTO_PCBC=m
CONFIG_CRYPTO_HMAC=y
CONFIG_CRYPTO_XCBC=m
CONFIG_CRYPTO_MD4=m
CONFIG_CRYPTO_SHA256=m
CONFIG_CRYPTO_SHA512=m
CONFIG_CRYPTO_TGR192=m
CONFIG_CRYPTO_WP512=m
CONFIG_CRYPTO_ANUBIS=m
CONFIG_CRYPTO_BLOWFISH=m
CONFIG_CRYPTO_CAMELLIA=m
CONFIG_CRYPTO_CAST5=m
CONFIG_CRYPTO_CAST6=m
CONFIG_CRYPTO_FCRYPT=m
CONFIG_CRYPTO_KHAZAD=m
CONFIG_CRYPTO_SERPENT=m
CONFIG_CRYPTO_TEA=m
CONFIG_CRYPTO_TWOFISH=m
# CONFIG_CRYPTO_ANSI_CPRNG is not set
CONFIG_CRC16=m
CONFIG_VIRTUALIZATION=y
CONFIG_KVM=m
CONFIG_KVM_MIPS_DYN_TRANS=y
CONFIG_KVM_MIPS_DEBUG_COP0_COUNTERS=y
CONFIG_VHOST_NET=m
arch/mips/configs/malta_kvm_guest_defconfig 0 → 100644
View file @ 5e0e61dd
CONFIG_MIPS_MALTA=y
CONFIG_CPU_LITTLE_ENDIAN=y
CONFIG_CPU_MIPS32_R2=y
CONFIG_KVM_GUEST=y
CONFIG_PAGE_SIZE_16KB=y
CONFIG_HZ_100=y
CONFIG_SYSVIPC=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_LOG_BUF_SHIFT=15
CONFIG_NAMESPACES=y
CONFIG_RELAY=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_EXPERT=y
# CONFIG_COMPAT_BRK is not set
CONFIG_SLAB=y
CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y
CONFIG_MODVERSIONS=y
CONFIG_MODULE_SRCVERSION_ALL=y
CONFIG_PCI=y
CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_XFRM_USER=m
CONFIG_NET_KEY=y
CONFIG_NET_KEY_MIGRATE=y
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
CONFIG_IP_ADVANCED_ROUTER=y
CONFIG_IP_MULTIPLE_TABLES=y
CONFIG_IP_ROUTE_MULTIPATH=y
CONFIG_IP_ROUTE_VERBOSE=y
CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
CONFIG_IP_PNP_BOOTP=y
CONFIG_NET_IPIP=m
CONFIG_IP_MROUTE=y
CONFIG_IP_PIMSM_V1=y
CONFIG_IP_PIMSM_V2=y
CONFIG_SYN_COOKIES=y
CONFIG_INET_AH=m
CONFIG_INET_ESP=m
CONFIG_INET_IPCOMP=m
CONFIG_INET_XFRM_MODE_TRANSPORT=m
CONFIG_INET_XFRM_MODE_TUNNEL=m
CONFIG_TCP_MD5SIG=y
CONFIG_IPV6_PRIVACY=y
CONFIG_IPV6_ROUTER_PREF=y
CONFIG_IPV6_ROUTE_INFO=y
CONFIG_IPV6_OPTIMISTIC_DAD=y
CONFIG_INET6_AH=m
CONFIG_INET6_ESP=m
CONFIG_INET6_IPCOMP=m
CONFIG_IPV6_TUNNEL=m
CONFIG_IPV6_MROUTE=y
CONFIG_IPV6_PIMSM_V2=y
CONFIG_NETWORK_SECMARK=y
CONFIG_NETFILTER=y
CONFIG_NF_CONNTRACK=m
CONFIG_NF_CONNTRACK_SECMARK=y
CONFIG_NF_CONNTRACK_EVENTS=y
CONFIG_NF_CT_PROTO_DCCP=m
CONFIG_NF_CT_PROTO_UDPLITE=m
CONFIG_NF_CONNTRACK_AMANDA=m
CONFIG_NF_CONNTRACK_FTP=m
CONFIG_NF_CONNTRACK_H323=m
CONFIG_NF_CONNTRACK_IRC=m
CONFIG_NF_CONNTRACK_PPTP=m
CONFIG_NF_CONNTRACK_SANE=m
CONFIG_NF_CONNTRACK_SIP=m
CONFIG_NF_CONNTRACK_TFTP=m
CONFIG_NF_CT_NETLINK=m
CONFIG_NETFILTER_TPROXY=m
CONFIG_NETFILTER_XT_TARGET_CLASSIFY=m
CONFIG_NETFILTER_XT_TARGET_CONNMARK=m
CONFIG_NETFILTER_XT_TARGET_MARK=m
CONFIG_NETFILTER_XT_TARGET_NFLOG=m
CONFIG_NETFILTER_XT_TARGET_NFQUEUE=m
CONFIG_NETFILTER_XT_TARGET_TPROXY=m
CONFIG_NETFILTER_XT_TARGET_TRACE=m
CONFIG_NETFILTER_XT_TARGET_SECMARK=m
CONFIG_NETFILTER_XT_TARGET_TCPMSS=m
CONFIG_NETFILTER_XT_TARGET_TCPOPTSTRIP=m
CONFIG_NETFILTER_XT_MATCH_COMMENT=m
CONFIG_NETFILTER_XT_MATCH_CONNBYTES=m
CONFIG_NETFILTER_XT_MATCH_CONNLIMIT=m
CONFIG_NETFILTER_XT_MATCH_CONNMARK=m
CONFIG_NETFILTER_XT_MATCH_CONNTRACK=m
CONFIG_NETFILTER_XT_MATCH_DCCP=m
CONFIG_NETFILTER_XT_MATCH_ESP=m
CONFIG_NETFILTER_XT_MATCH_HASHLIMIT=m
CONFIG_NETFILTER_XT_MATCH_HELPER=m
CONFIG_NETFILTER_XT_MATCH_IPRANGE=m
CONFIG_NETFILTER_XT_MATCH_LENGTH=m
CONFIG_NETFILTER_XT_MATCH_LIMIT=m
CONFIG_NETFILTER_XT_MATCH_MAC=m
CONFIG_NETFILTER_XT_MATCH_MARK=m
CONFIG_NETFILTER_XT_MATCH_MULTIPORT=m
CONFIG_NETFILTER_XT_MATCH_OWNER=m
CONFIG_NETFILTER_XT_MATCH_POLICY=m
CONFIG_NETFILTER_XT_MATCH_PKTTYPE=m
CONFIG_NETFILTER_XT_MATCH_QUOTA=m
CONFIG_NETFILTER_XT_MATCH_RATEEST=m
CONFIG_NETFILTER_XT_MATCH_REALM=m
CONFIG_NETFILTER_XT_MATCH_RECENT=m
CONFIG_NETFILTER_XT_MATCH_SOCKET=m
CONFIG_NETFILTER_XT_MATCH_STATE=m
CONFIG_NETFILTER_XT_MATCH_STATISTIC=m
CONFIG_NETFILTER_XT_MATCH_STRING=m
CONFIG_NETFILTER_XT_MATCH_TCPMSS=m
CONFIG_NETFILTER_XT_MATCH_TIME=m
CONFIG_NETFILTER_XT_MATCH_U32=m
CONFIG_IP_VS=m
CONFIG_IP_VS_IPV6=y
CONFIG_IP_VS_PROTO_TCP=y
CONFIG_IP_VS_PROTO_UDP=y
CONFIG_IP_VS_PROTO_ESP=y
CONFIG_IP_VS_PROTO_AH=y
CONFIG_IP_VS_RR=m
CONFIG_IP_VS_WRR=m
CONFIG_IP_VS_LC=m
CONFIG_IP_VS_WLC=m
CONFIG_IP_VS_LBLC=m
CONFIG_IP_VS_LBLCR=m
CONFIG_IP_VS_DH=m
CONFIG_IP_VS_SH=m
CONFIG_IP_VS_SED=m
CONFIG_IP_VS_NQ=m
CONFIG_NF_CONNTRACK_IPV4=m
CONFIG_IP_NF_QUEUE=m
CONFIG_IP_NF_IPTABLES=m
CONFIG_IP_NF_MATCH_AH=m
CONFIG_IP_NF_MATCH_ECN=m
CONFIG_IP_NF_MATCH_TTL=m
CONFIG_IP_NF_FILTER=m
CONFIG_IP_NF_TARGET_REJECT=m
CONFIG_IP_NF_TARGET_ULOG=m
CONFIG_IP_NF_MANGLE=m
CONFIG_IP_NF_TARGET_CLUSTERIP=m
CONFIG_IP_NF_TARGET_ECN=m
CONFIG_IP_NF_TARGET_TTL=m
CONFIG_IP_NF_RAW=m
CONFIG_IP_NF_ARPTABLES=m
CONFIG_IP_NF_ARPFILTER=m
CONFIG_IP_NF_ARP_MANGLE=m
CONFIG_NF_CONNTRACK_IPV6=m
CONFIG_IP6_NF_MATCH_AH=m
CONFIG_IP6_NF_MATCH_EUI64=m
CONFIG_IP6_NF_MATCH_FRAG=m
CONFIG_IP6_NF_MATCH_OPTS=m
CONFIG_IP6_NF_MATCH_HL=m
CONFIG_IP6_NF_MATCH_IPV6HEADER=m
CONFIG_IP6_NF_MATCH_MH=m
CONFIG_IP6_NF_MATCH_RT=m
CONFIG_IP6_NF_TARGET_HL=m
CONFIG_IP6_NF_FILTER=m
CONFIG_IP6_NF_TARGET_REJECT=m
CONFIG_IP6_NF_MANGLE=m
CONFIG_IP6_NF_RAW=m
CONFIG_BRIDGE_NF_EBTABLES=m
CONFIG_BRIDGE_EBT_BROUTE=m
CONFIG_BRIDGE_EBT_T_FILTER=m
CONFIG_BRIDGE_EBT_T_NAT=m
CONFIG_BRIDGE_EBT_802_3=m
CONFIG_BRIDGE_EBT_AMONG=m
CONFIG_BRIDGE_EBT_ARP=m
CONFIG_BRIDGE_EBT_IP=m
CONFIG_BRIDGE_EBT_IP6=m
CONFIG_BRIDGE_EBT_LIMIT=m
CONFIG_BRIDGE_EBT_MARK=m
CONFIG_BRIDGE_EBT_PKTTYPE=m
CONFIG_BRIDGE_EBT_STP=m
CONFIG_BRIDGE_EBT_VLAN=m
CONFIG_BRIDGE_EBT_ARPREPLY=m
CONFIG_BRIDGE_EBT_DNAT=m
CONFIG_BRIDGE_EBT_MARK_T=m
CONFIG_BRIDGE_EBT_REDIRECT=m
CONFIG_BRIDGE_EBT_SNAT=m
CONFIG_BRIDGE_EBT_LOG=m
CONFIG_BRIDGE_EBT_ULOG=m
CONFIG_BRIDGE_EBT_NFLOG=m
CONFIG_IP_SCTP=m
CONFIG_BRIDGE=m
CONFIG_VLAN_8021Q=m
CONFIG_VLAN_8021Q_GVRP=y
CONFIG_ATALK=m
CONFIG_DEV_APPLETALK=m
CONFIG_IPDDP=m
CONFIG_IPDDP_ENCAP=y
CONFIG_IPDDP_DECAP=y
CONFIG_PHONET=m
CONFIG_NET_SCHED=y
CONFIG_NET_SCH_CBQ=m
CONFIG_NET_SCH_HTB=m
CONFIG_NET_SCH_HFSC=m
CONFIG_NET_SCH_PRIO=m
CONFIG_NET_SCH_RED=m
CONFIG_NET_SCH_SFQ=m
CONFIG_NET_SCH_TEQL=m
CONFIG_NET_SCH_TBF=m
CONFIG_NET_SCH_GRED=m
CONFIG_NET_SCH_DSMARK=m
CONFIG_NET_SCH_NETEM=m
CONFIG_NET_SCH_INGRESS=m
CONFIG_NET_CLS_BASIC=m
CONFIG_NET_CLS_TCINDEX=m
CONFIG_NET_CLS_ROUTE4=m
CONFIG_NET_CLS_FW=m
CONFIG_NET_CLS_U32=m
CONFIG_NET_CLS_RSVP=m
CONFIG_NET_CLS_RSVP6=m
CONFIG_NET_CLS_FLOW=m
CONFIG_NET_CLS_ACT=y
CONFIG_NET_ACT_POLICE=y
CONFIG_NET_ACT_GACT=m
CONFIG_GACT_PROB=y
CONFIG_NET_ACT_MIRRED=m
CONFIG_NET_ACT_IPT=m
CONFIG_NET_ACT_NAT=m
CONFIG_NET_ACT_PEDIT=m
CONFIG_NET_ACT_SIMP=m
CONFIG_NET_ACT_SKBEDIT=m
CONFIG_NET_CLS_IND=y
CONFIG_CFG80211=m
CONFIG_MAC80211=m
CONFIG_MAC80211_RC_PID=y
CONFIG_MAC80211_RC_DEFAULT_PID=y
CONFIG_MAC80211_MESH=y
CONFIG_RFKILL=m
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
CONFIG_CONNECTOR=m
CONFIG_MTD=y
CONFIG_MTD_CHAR=y
CONFIG_MTD_BLOCK=y
CONFIG_MTD_OOPS=m
CONFIG_MTD_CFI=y
CONFIG_MTD_CFI_INTELEXT=y
CONFIG_MTD_CFI_AMDSTD=y
CONFIG_MTD_CFI_STAA=y
CONFIG_MTD_PHYSMAP=y
CONFIG_MTD_UBI=m
CONFIG_MTD_UBI_GLUEBI=m
CONFIG_BLK_DEV_FD=m
CONFIG_BLK_DEV_UMEM=m
CONFIG_BLK_DEV_LOOP=m
CONFIG_BLK_DEV_CRYPTOLOOP=m
CONFIG_BLK_DEV_NBD=m
CONFIG_BLK_DEV_RAM=y
CONFIG_CDROM_PKTCDVD=m
CONFIG_ATA_OVER_ETH=m
CONFIG_VIRTIO_BLK=y
CONFIG_IDE=y
CONFIG_BLK_DEV_IDECD=y
CONFIG_IDE_GENERIC=y
CONFIG_BLK_DEV_GENERIC=y
CONFIG_BLK_DEV_PIIX=y
CONFIG_BLK_DEV_IT8213=m
CONFIG_BLK_DEV_TC86C001=m
CONFIG_RAID_ATTRS=m
CONFIG_SCSI=m
CONFIG_SCSI_TGT=m
CONFIG_BLK_DEV_SD=m
CONFIG_CHR_DEV_ST=m
CONFIG_CHR_DEV_OSST=m
CONFIG_BLK_DEV_SR=m
CONFIG_BLK_DEV_SR_VENDOR=y
CONFIG_CHR_DEV_SG=m
CONFIG_SCSI_MULTI_LUN=y
CONFIG_SCSI_CONSTANTS=y
CONFIG_SCSI_LOGGING=y
CONFIG_SCSI_SCAN_ASYNC=y
CONFIG_SCSI_FC_ATTRS=m
CONFIG_ISCSI_TCP=m
CONFIG_BLK_DEV_3W_XXXX_RAID=m
CONFIG_SCSI_3W_9XXX=m
CONFIG_SCSI_ACARD=m
CONFIG_SCSI_AACRAID=m
CONFIG_SCSI_AIC7XXX=m
CONFIG_AIC7XXX_RESET_DELAY_MS=15000
# CONFIG_AIC7XXX_DEBUG_ENABLE is not set
CONFIG_MD=y
CONFIG_BLK_DEV_MD=m
CONFIG_MD_LINEAR=m
CONFIG_MD_RAID0=m
CONFIG_MD_RAID1=m
CONFIG_MD_RAID10=m
CONFIG_MD_RAID456=m
CONFIG_MD_MULTIPATH=m
CONFIG_MD_FAULTY=m
CONFIG_BLK_DEV_DM=m
CONFIG_DM_CRYPT=m
CONFIG_DM_SNAPSHOT=m
CONFIG_DM_MIRROR=m
CONFIG_DM_ZERO=m
CONFIG_DM_MULTIPATH=m
CONFIG_NETDEVICES=y
CONFIG_BONDING=m
CONFIG_DUMMY=m
CONFIG_EQUALIZER=m
CONFIG_IFB=m
CONFIG_MACVLAN=m
CONFIG_TUN=m
CONFIG_VETH=m
CONFIG_VIRTIO_NET=y
CONFIG_PCNET32=y
CONFIG_CHELSIO_T3=m
CONFIG_AX88796=m
CONFIG_NETXEN_NIC=m
CONFIG_TC35815=m
CONFIG_MARVELL_PHY=m
CONFIG_DAVICOM_PHY=m
CONFIG_QSEMI_PHY=m
CONFIG_LXT_PHY=m
CONFIG_CICADA_PHY=m
CONFIG_VITESSE_PHY=m
CONFIG_SMSC_PHY=m
CONFIG_BROADCOM_PHY=m
CONFIG_ICPLUS_PHY=m
CONFIG_REALTEK_PHY=m
CONFIG_ATMEL=m
CONFIG_PCI_ATMEL=m
CONFIG_PRISM54=m
CONFIG_HOSTAP=m
CONFIG_HOSTAP_FIRMWARE=y
CONFIG_HOSTAP_FIRMWARE_NVRAM=y
CONFIG_HOSTAP_PLX=m
CONFIG_HOSTAP_PCI=m
CONFIG_IPW2100=m
CONFIG_IPW2100_MONITOR=y
CONFIG_LIBERTAS=m
# CONFIG_INPUT_KEYBOARD is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_SERIO_I8042 is not set
CONFIG_VT_HW_CONSOLE_BINDING=y
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
# CONFIG_HWMON is not set
CONFIG_FB=y
CONFIG_FB_CIRRUS=y
# CONFIG_VGA_CONSOLE is not set
CONFIG_FRAMEBUFFER_CONSOLE=y
CONFIG_HID=m
CONFIG_RTC_CLASS=y
CONFIG_RTC_DRV_CMOS=y
CONFIG_UIO=m
CONFIG_UIO_CIF=m
CONFIG_VIRTIO_PCI=y
CONFIG_VIRTIO_BALLOON=y
CONFIG_VIRTIO_MMIO=y
CONFIG_EXT2_FS=y
CONFIG_EXT3_FS=y
CONFIG_REISERFS_FS=m
CONFIG_REISERFS_PROC_INFO=y
CONFIG_REISERFS_FS_XATTR=y
CONFIG_REISERFS_FS_POSIX_ACL=y
CONFIG_REISERFS_FS_SECURITY=y
CONFIG_JFS_FS=m
CONFIG_JFS_POSIX_ACL=y
CONFIG_JFS_SECURITY=y
CONFIG_XFS_FS=m
CONFIG_XFS_QUOTA=y
CONFIG_XFS_POSIX_ACL=y
CONFIG_QUOTA=y
CONFIG_QFMT_V2=y
CONFIG_FUSE_FS=m
CONFIG_ISO9660_FS=m
CONFIG_JOLIET=y
CONFIG_ZISOFS=y
CONFIG_UDF_FS=m
CONFIG_MSDOS_FS=m
CONFIG_VFAT_FS=m
CONFIG_PROC_KCORE=y
CONFIG_TMPFS=y
CONFIG_AFFS_FS=m
CONFIG_HFS_FS=m
CONFIG_HFSPLUS_FS=m
CONFIG_BEFS_FS=m
CONFIG_BFS_FS=m
CONFIG_EFS_FS=m
CONFIG_JFFS2_FS=m
CONFIG_JFFS2_FS_XATTR=y
CONFIG_JFFS2_COMPRESSION_OPTIONS=y
CONFIG_JFFS2_RUBIN=y
CONFIG_CRAMFS=m
CONFIG_VXFS_FS=m
CONFIG_MINIX_FS=m
CONFIG_ROMFS_FS=m
CONFIG_SYSV_FS=m
CONFIG_UFS_FS=m
CONFIG_NFS_FS=y
CONFIG_ROOT_NFS=y
CONFIG_NFSD=y
CONFIG_NFSD_V3=y
CONFIG_NLS_CODEPAGE_437=m
CONFIG_NLS_CODEPAGE_737=m
CONFIG_NLS_CODEPAGE_775=m
CONFIG_NLS_CODEPAGE_850=m
CONFIG_NLS_CODEPAGE_852=m
CONFIG_NLS_CODEPAGE_855=m
CONFIG_NLS_CODEPAGE_857=m
CONFIG_NLS_CODEPAGE_860=m
CONFIG_NLS_CODEPAGE_861=m
CONFIG_NLS_CODEPAGE_862=m
CONFIG_NLS_CODEPAGE_863=m
CONFIG_NLS_CODEPAGE_864=m
CONFIG_NLS_CODEPAGE_865=m
CONFIG_NLS_CODEPAGE_866=m
CONFIG_NLS_CODEPAGE_869=m
CONFIG_NLS_CODEPAGE_936=m
CONFIG_NLS_CODEPAGE_950=m
CONFIG_NLS_CODEPAGE_932=m
CONFIG_NLS_CODEPAGE_949=m
CONFIG_NLS_CODEPAGE_874=m
CONFIG_NLS_ISO8859_8=m
CONFIG_NLS_CODEPAGE_1250=m
CONFIG_NLS_CODEPAGE_1251=m
CONFIG_NLS_ASCII=m
CONFIG_NLS_ISO8859_1=m
CONFIG_NLS_ISO8859_2=m
CONFIG_NLS_ISO8859_3=m
CONFIG_NLS_ISO8859_4=m
CONFIG_NLS_ISO8859_5=m
CONFIG_NLS_ISO8859_6=m
CONFIG_NLS_ISO8859_7=m
CONFIG_NLS_ISO8859_9=m
CONFIG_NLS_ISO8859_13=m
CONFIG_NLS_ISO8859_14=m
CONFIG_NLS_ISO8859_15=m
CONFIG_NLS_KOI8_R=m
CONFIG_NLS_KOI8_U=m
CONFIG_CRYPTO_NULL=m
CONFIG_CRYPTO_CRYPTD=m
CONFIG_CRYPTO_LRW=m
CONFIG_CRYPTO_PCBC=m
CONFIG_CRYPTO_HMAC=y
CONFIG_CRYPTO_XCBC=m
CONFIG_CRYPTO_MD4=m
CONFIG_CRYPTO_SHA256=m
CONFIG_CRYPTO_SHA512=m
CONFIG_CRYPTO_TGR192=m
CONFIG_CRYPTO_WP512=m
CONFIG_CRYPTO_ANUBIS=m
CONFIG_CRYPTO_BLOWFISH=m
CONFIG_CRYPTO_CAMELLIA=m
CONFIG_CRYPTO_CAST5=m
CONFIG_CRYPTO_CAST6=m
CONFIG_CRYPTO_FCRYPT=m
CONFIG_CRYPTO_KHAZAD=m
CONFIG_CRYPTO_SERPENT=m
CONFIG_CRYPTO_TEA=m
CONFIG_CRYPTO_TWOFISH=m
# CONFIG_CRYPTO_ANSI_CPRNG is not set
CONFIG_CRC16=m
arch/mips/include/asm/kvm.h 0 → 100644
View file @ 5e0e61dd
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
* Authors: Sanjay Lal <sanjayl@kymasys.com>
*/
#ifndef __LINUX_KVM_MIPS_H
#define __LINUX_KVM_MIPS_H
#include <linux/types.h>
#define __KVM_MIPS
#define N_MIPS_COPROC_REGS 32
#define N_MIPS_COPROC_SEL 8
/* for KVM_GET_REGS and KVM_SET_REGS */
struct kvm_regs {
__u32 gprs[32];
__u32 hi;
__u32 lo;
__u32 pc;
__u32 cp0reg[N_MIPS_COPROC_REGS][N_MIPS_COPROC_SEL];
};
/* for KVM_GET_SREGS and KVM_SET_SREGS */
struct kvm_sregs {
};
/* for KVM_GET_FPU and KVM_SET_FPU */
struct kvm_fpu {
};
struct kvm_debug_exit_arch {
};
/* for KVM_SET_GUEST_DEBUG */
struct kvm_guest_debug_arch {
};
struct kvm_mips_interrupt {
/* in */
__u32 cpu;
__u32 irq;
};
/* definition of registers in kvm_run */
struct kvm_sync_regs {
};
#endif /* __LINUX_KVM_MIPS_H */
arch/mips/include/asm/kvm_host.h 0 → 100644
View file @ 5e0e61dd
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
* Authors: Sanjay Lal <sanjayl@kymasys.com>
*/
#ifndef __MIPS_KVM_HOST_H__
#define __MIPS_KVM_HOST_H__
#include <linux/mutex.h>
#include <linux/hrtimer.h>
#include <linux/interrupt.h>
#include <linux/types.h>
#include <linux/kvm.h>
#include <linux/kvm_types.h>
#include <linux/threads.h>
#include <linux/spinlock.h>
#define KVM_MAX_VCPUS 1
#define KVM_USER_MEM_SLOTS 8
/* memory slots that does not exposed to userspace */
#define KVM_PRIVATE_MEM_SLOTS 0
#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
/* Don't support huge pages */
#define KVM_HPAGE_GFN_SHIFT(x) 0
/* We don't currently support large pages. */
#define KVM_NR_PAGE_SIZES 1
#define KVM_PAGES_PER_HPAGE(x) 1
/* Special address that contains the comm page, used for reducing # of traps */
#define KVM_GUEST_COMMPAGE_ADDR 0x0
#define KVM_GUEST_KERNEL_MODE(vcpu) ((kvm_read_c0_guest_status(vcpu->arch.cop0) & (ST0_EXL | ST0_ERL)) || \
((kvm_read_c0_guest_status(vcpu->arch.cop0) & KSU_USER) == 0))
#define KVM_GUEST_KUSEG 0x00000000UL
#define KVM_GUEST_KSEG0 0x40000000UL
#define KVM_GUEST_KSEG23 0x60000000UL
#define KVM_GUEST_KSEGX(a) ((_ACAST32_(a)) & 0x60000000)
#define KVM_GUEST_CPHYSADDR(a) ((_ACAST32_(a)) & 0x1fffffff)
#define KVM_GUEST_CKSEG0ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG0)
#define KVM_GUEST_CKSEG1ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG1)
#define KVM_GUEST_CKSEG23ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG23)
/*
* Map an address to a certain kernel segment
*/
#define KVM_GUEST_KSEG0ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG0)
#define KVM_GUEST_KSEG1ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG1)
#define KVM_GUEST_KSEG23ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG23)
#define KVM_INVALID_PAGE 0xdeadbeef
#define KVM_INVALID_INST 0xdeadbeef
#define KVM_INVALID_ADDR 0xdeadbeef
#define KVM_MALTA_GUEST_RTC_ADDR 0xb8000070UL
#define GUEST_TICKS_PER_JIFFY (40000000/HZ)
#define MS_TO_NS(x) (x * 1E6L)
#define CAUSEB_DC 27
#define CAUSEF_DC (_ULCAST_(1) << 27)
struct kvm;
struct kvm_run;
struct kvm_vcpu;
struct kvm_interrupt;
extern atomic_t kvm_mips_instance;
extern pfn_t(*kvm_mips_gfn_to_pfn) (struct kvm *kvm, gfn_t gfn);
extern void (*kvm_mips_release_pfn_clean) (pfn_t pfn);
extern bool(*kvm_mips_is_error_pfn) (pfn_t pfn);
struct kvm_vm_stat {
u32 remote_tlb_flush;
};
struct kvm_vcpu_stat {
u32 wait_exits;
u32 cache_exits;
u32 signal_exits;
u32 int_exits;
u32 cop_unusable_exits;
u32 tlbmod_exits;
u32 tlbmiss_ld_exits;
u32 tlbmiss_st_exits;
u32 addrerr_st_exits;
u32 addrerr_ld_exits;
u32 syscall_exits;
u32 resvd_inst_exits;
u32 break_inst_exits;
u32 flush_dcache_exits;
u32 halt_wakeup;
};
enum kvm_mips_exit_types {
WAIT_EXITS,
CACHE_EXITS,
SIGNAL_EXITS,
INT_EXITS,
COP_UNUSABLE_EXITS,
TLBMOD_EXITS,
TLBMISS_LD_EXITS,
TLBMISS_ST_EXITS,
ADDRERR_ST_EXITS,
ADDRERR_LD_EXITS,
SYSCALL_EXITS,
RESVD_INST_EXITS,
BREAK_INST_EXITS,
FLUSH_DCACHE_EXITS,
MAX_KVM_MIPS_EXIT_TYPES
};
struct kvm_arch_memory_slot {
};
struct kvm_arch {
/* Guest GVA->HPA page table */
unsigned long *guest_pmap;
unsigned long guest_pmap_npages;
/* Wired host TLB used for the commpage */
int commpage_tlb;
};
#define N_MIPS_COPROC_REGS 32
#define N_MIPS_COPROC_SEL 8
struct mips_coproc {
unsigned long reg[N_MIPS_COPROC_REGS][N_MIPS_COPROC_SEL];
#ifdef CONFIG_KVM_MIPS_DEBUG_COP0_COUNTERS
unsigned long stat[N_MIPS_COPROC_REGS][N_MIPS_COPROC_SEL];
#endif
};
/*
* Coprocessor 0 register names
*/
#define MIPS_CP0_TLB_INDEX 0
#define MIPS_CP0_TLB_RANDOM 1
#define MIPS_CP0_TLB_LOW 2
#define MIPS_CP0_TLB_LO0 2
#define MIPS_CP0_TLB_LO1 3
#define MIPS_CP0_TLB_CONTEXT 4
#define MIPS_CP0_TLB_PG_MASK 5
#define MIPS_CP0_TLB_WIRED 6
#define MIPS_CP0_HWRENA 7
#define MIPS_CP0_BAD_VADDR 8
#define MIPS_CP0_COUNT 9
#define MIPS_CP0_TLB_HI 10
#define MIPS_CP0_COMPARE 11
#define MIPS_CP0_STATUS 12
#define MIPS_CP0_CAUSE 13
#define MIPS_CP0_EXC_PC 14
#define MIPS_CP0_PRID 15
#define MIPS_CP0_CONFIG 16
#define MIPS_CP0_LLADDR 17
#define MIPS_CP0_WATCH_LO 18
#define MIPS_CP0_WATCH_HI 19
#define MIPS_CP0_TLB_XCONTEXT 20
#define MIPS_CP0_ECC 26
#define MIPS_CP0_CACHE_ERR 27
#define MIPS_CP0_TAG_LO 28
#define MIPS_CP0_TAG_HI 29
#define MIPS_CP0_ERROR_PC 30
#define MIPS_CP0_DEBUG 23
#define MIPS_CP0_DEPC 24
#define MIPS_CP0_PERFCNT 25
#define MIPS_CP0_ERRCTL 26
#define MIPS_CP0_DATA_LO 28
#define MIPS_CP0_DATA_HI 29
#define MIPS_CP0_DESAVE 31
#define MIPS_CP0_CONFIG_SEL 0
#define MIPS_CP0_CONFIG1_SEL 1
#define MIPS_CP0_CONFIG2_SEL 2
#define MIPS_CP0_CONFIG3_SEL 3
/* Config0 register bits */
#define CP0C0_M 31
#define CP0C0_K23 28
#define CP0C0_KU 25
#define CP0C0_MDU 20
#define CP0C0_MM 17
#define CP0C0_BM 16
#define CP0C0_BE 15
#define CP0C0_AT 13
#define CP0C0_AR 10
#define CP0C0_MT 7
#define CP0C0_VI 3
#define CP0C0_K0 0
/* Config1 register bits */
#define CP0C1_M 31
#define CP0C1_MMU 25
#define CP0C1_IS 22
#define CP0C1_IL 19
#define CP0C1_IA 16
#define CP0C1_DS 13
#define CP0C1_DL 10
#define CP0C1_DA 7
#define CP0C1_C2 6
#define CP0C1_MD 5
#define CP0C1_PC 4
#define CP0C1_WR 3
#define CP0C1_CA 2
#define CP0C1_EP 1
#define CP0C1_FP 0
/* Config2 Register bits */
#define CP0C2_M 31
#define CP0C2_TU 28
#define CP0C2_TS 24
#define CP0C2_TL 20
#define CP0C2_TA 16
#define CP0C2_SU 12
#define CP0C2_SS 8
#define CP0C2_SL 4
#define CP0C2_SA 0
/* Config3 Register bits */
#define CP0C3_M 31
#define CP0C3_ISA_ON_EXC 16
#define CP0C3_ULRI 13
#define CP0C3_DSPP 10
#define CP0C3_LPA 7
#define CP0C3_VEIC 6
#define CP0C3_VInt 5
#define CP0C3_SP 4
#define CP0C3_MT 2
#define CP0C3_SM 1
#define CP0C3_TL 0
/* Have config1, Cacheable, noncoherent, write-back, write allocate*/
#define MIPS_CONFIG0 \
((1 << CP0C0_M) | (0x3 << CP0C0_K0))
/* Have config2, no coprocessor2 attached, no MDMX support attached,
no performance counters, watch registers present,
no code compression, EJTAG present, no FPU, no watch registers */
#define MIPS_CONFIG1 \
((1 << CP0C1_M) | \
(0 << CP0C1_C2) | (0 << CP0C1_MD) | (0 << CP0C1_PC) | \
(0 << CP0C1_WR) | (0 << CP0C1_CA) | (1 << CP0C1_EP) | \
(0 << CP0C1_FP))
/* Have config3, no tertiary/secondary caches implemented */
#define MIPS_CONFIG2 \
((1 << CP0C2_M))
/* No config4, no DSP ASE, no large physaddr (PABITS),
no external interrupt controller, no vectored interrupts,
no 1kb pages, no SmartMIPS ASE, no trace logic */
#define MIPS_CONFIG3 \
((0 << CP0C3_M) | (0 << CP0C3_DSPP) | (0 << CP0C3_LPA) | \
(0 << CP0C3_VEIC) | (0 << CP0C3_VInt) | (0 << CP0C3_SP) | \
(0 << CP0C3_SM) | (0 << CP0C3_TL))
/* MMU types, the first four entries have the same layout as the
CP0C0_MT field. */
enum mips_mmu_types {
MMU_TYPE_NONE,
MMU_TYPE_R4000,
MMU_TYPE_RESERVED,
MMU_TYPE_FMT,
MMU_TYPE_R3000,
MMU_TYPE_R6000,
MMU_TYPE_R8000
};
/*
* Trap codes
*/
#define T_INT 0 /* Interrupt pending */
#define T_TLB_MOD 1 /* TLB modified fault */
#define T_TLB_LD_MISS 2 /* TLB miss on load or ifetch */
#define T_TLB_ST_MISS 3 /* TLB miss on a store */
#define T_ADDR_ERR_LD 4 /* Address error on a load or ifetch */
#define T_ADDR_ERR_ST 5 /* Address error on a store */
#define T_BUS_ERR_IFETCH 6 /* Bus error on an ifetch */
#define T_BUS_ERR_LD_ST 7 /* Bus error on a load or store */
#define T_SYSCALL 8 /* System call */
#define T_BREAK 9 /* Breakpoint */
#define T_RES_INST 10 /* Reserved instruction exception */
#define T_COP_UNUSABLE 11 /* Coprocessor unusable */
#define T_OVFLOW 12 /* Arithmetic overflow */
/*
* Trap definitions added for r4000 port.
*/
#define T_TRAP 13 /* Trap instruction */
#define T_VCEI 14 /* Virtual coherency exception */
#define T_FPE 15 /* Floating point exception */
#define T_WATCH 23 /* Watch address reference */
#define T_VCED 31 /* Virtual coherency data */
/* Resume Flags */
#define RESUME_FLAG_DR (1<<0) /* Reload guest nonvolatile state? */
#define RESUME_FLAG_HOST (1<<1) /* Resume host? */
#define RESUME_GUEST 0
#define RESUME_GUEST_DR RESUME_FLAG_DR
#define RESUME_HOST RESUME_FLAG_HOST
enum emulation_result {
EMULATE_DONE, /* no further processing */
EMULATE_DO_MMIO, /* kvm_run filled with MMIO request */
EMULATE_FAIL, /* can't emulate this instruction */
EMULATE_WAIT, /* WAIT instruction */
EMULATE_PRIV_FAIL,
};
#define MIPS3_PG_G 0x00000001 /* Global; ignore ASID if in lo0 & lo1 */
#define MIPS3_PG_V 0x00000002 /* Valid */
#define MIPS3_PG_NV 0x00000000
#define MIPS3_PG_D 0x00000004 /* Dirty */
#define mips3_paddr_to_tlbpfn(x) \
(((unsigned long)(x) >> MIPS3_PG_SHIFT) & MIPS3_PG_FRAME)
#define mips3_tlbpfn_to_paddr(x) \
((unsigned long)((x) & MIPS3_PG_FRAME) << MIPS3_PG_SHIFT)
#define MIPS3_PG_SHIFT 6
#define MIPS3_PG_FRAME 0x3fffffc0
#define VPN2_MASK 0xffffe000
#define TLB_IS_GLOBAL(x) (((x).tlb_lo0 & MIPS3_PG_G) && ((x).tlb_lo1 & MIPS3_PG_G))
#define TLB_VPN2(x) ((x).tlb_hi & VPN2_MASK)
#define TLB_ASID(x) ((x).tlb_hi & ASID_MASK)
#define TLB_IS_VALID(x, va) (((va) & (1 << PAGE_SHIFT)) ? ((x).tlb_lo1 & MIPS3_PG_V) : ((x).tlb_lo0 & MIPS3_PG_V))
struct kvm_mips_tlb {
long tlb_mask;
long tlb_hi;
long tlb_lo0;
long tlb_lo1;
};
#define KVM_MIPS_GUEST_TLB_SIZE 64
struct kvm_vcpu_arch {
void *host_ebase, *guest_ebase;
unsigned long host_stack;
unsigned long host_gp;
/* Host CP0 registers used when handling exits from guest */
unsigned long host_cp0_badvaddr;
unsigned long host_cp0_cause;
unsigned long host_cp0_epc;
unsigned long host_cp0_entryhi;
uint32_t guest_inst;
/* GPRS */
unsigned long gprs[32];
unsigned long hi;
unsigned long lo;
unsigned long pc;
/* FPU State */
struct mips_fpu_struct fpu;
/* COP0 State */
struct mips_coproc *cop0;
/* Host KSEG0 address of the EI/DI offset */
void *kseg0_commpage;
u32 io_gpr; /* GPR used as IO source/target */
/* Used to calibrate the virutal count register for the guest */
int32_t host_cp0_count;
/* Bitmask of exceptions that are pending */
unsigned long pending_exceptions;
/* Bitmask of pending exceptions to be cleared */
unsigned long pending_exceptions_clr;
unsigned long pending_load_cause;
/* Save/Restore the entryhi register when are are preempted/scheduled back in */
unsigned long preempt_entryhi;
/* S/W Based TLB for guest */
struct kvm_mips_tlb guest_tlb[KVM_MIPS_GUEST_TLB_SIZE];
/* Cached guest kernel/user ASIDs */
uint32_t guest_user_asid[NR_CPUS];
uint32_t guest_kernel_asid[NR_CPUS];
struct mm_struct guest_kernel_mm, guest_user_mm;
struct kvm_mips_tlb shadow_tlb[NR_CPUS][KVM_MIPS_GUEST_TLB_SIZE];
struct hrtimer comparecount_timer;
int last_sched_cpu;
/* WAIT executed */
int wait;
};
#define kvm_read_c0_guest_index(cop0) (cop0->reg[MIPS_CP0_TLB_INDEX][0])
#define kvm_write_c0_guest_index(cop0, val) (cop0->reg[MIPS_CP0_TLB_INDEX][0] = val)
#define kvm_read_c0_guest_entrylo0(cop0) (cop0->reg[MIPS_CP0_TLB_LO0][0])
#define kvm_read_c0_guest_entrylo1(cop0) (cop0->reg[MIPS_CP0_TLB_LO1][0])
#define kvm_read_c0_guest_context(cop0) (cop0->reg[MIPS_CP0_TLB_CONTEXT][0])
#define kvm_write_c0_guest_context(cop0, val) (cop0->reg[MIPS_CP0_TLB_CONTEXT][0] = (val))
#define kvm_read_c0_guest_userlocal(cop0) (cop0->reg[MIPS_CP0_TLB_CONTEXT][2])
#define kvm_read_c0_guest_pagemask(cop0) (cop0->reg[MIPS_CP0_TLB_PG_MASK][0])
#define kvm_write_c0_guest_pagemask(cop0, val) (cop0->reg[MIPS_CP0_TLB_PG_MASK][0] = (val))
#define kvm_read_c0_guest_wired(cop0) (cop0->reg[MIPS_CP0_TLB_WIRED][0])
#define kvm_write_c0_guest_wired(cop0, val) (cop0->reg[MIPS_CP0_TLB_WIRED][0] = (val))
#define kvm_read_c0_guest_badvaddr(cop0) (cop0->reg[MIPS_CP0_BAD_VADDR][0])
#define kvm_write_c0_guest_badvaddr(cop0, val) (cop0->reg[MIPS_CP0_BAD_VADDR][0] = (val))
#define kvm_read_c0_guest_count(cop0) (cop0->reg[MIPS_CP0_COUNT][0])
#define kvm_write_c0_guest_count(cop0, val) (cop0->reg[MIPS_CP0_COUNT][0] = (val))
#define kvm_read_c0_guest_entryhi(cop0) (cop0->reg[MIPS_CP0_TLB_HI][0])
#define kvm_write_c0_guest_entryhi(cop0, val) (cop0->reg[MIPS_CP0_TLB_HI][0] = (val))
#define kvm_read_c0_guest_compare(cop0) (cop0->reg[MIPS_CP0_COMPARE][0])
#define kvm_write_c0_guest_compare(cop0, val) (cop0->reg[MIPS_CP0_COMPARE][0] = (val))
#define kvm_read_c0_guest_status(cop0) (cop0->reg[MIPS_CP0_STATUS][0])
#define kvm_write_c0_guest_status(cop0, val) (cop0->reg[MIPS_CP0_STATUS][0] = (val))
#define kvm_read_c0_guest_intctl(cop0) (cop0->reg[MIPS_CP0_STATUS][1])
#define kvm_write_c0_guest_intctl(cop0, val) (cop0->reg[MIPS_CP0_STATUS][1] = (val))
#define kvm_read_c0_guest_cause(cop0) (cop0->reg[MIPS_CP0_CAUSE][0])
#define kvm_write_c0_guest_cause(cop0, val) (cop0->reg[MIPS_CP0_CAUSE][0] = (val))
#define kvm_read_c0_guest_epc(cop0) (cop0->reg[MIPS_CP0_EXC_PC][0])
#define kvm_write_c0_guest_epc(cop0, val) (cop0->reg[MIPS_CP0_EXC_PC][0] = (val))
#define kvm_read_c0_guest_prid(cop0) (cop0->reg[MIPS_CP0_PRID][0])
#define kvm_write_c0_guest_prid(cop0, val) (cop0->reg[MIPS_CP0_PRID][0] = (val))
#define kvm_read_c0_guest_ebase(cop0) (cop0->reg[MIPS_CP0_PRID][1])
#define kvm_write_c0_guest_ebase(cop0, val) (cop0->reg[MIPS_CP0_PRID][1] = (val))
#define kvm_read_c0_guest_config(cop0) (cop0->reg[MIPS_CP0_CONFIG][0])
#define kvm_read_c0_guest_config1(cop0) (cop0->reg[MIPS_CP0_CONFIG][1])
#define kvm_read_c0_guest_config2(cop0) (cop0->reg[MIPS_CP0_CONFIG][2])
#define kvm_read_c0_guest_config3(cop0) (cop0->reg[MIPS_CP0_CONFIG][3])
#define kvm_read_c0_guest_config7(cop0) (cop0->reg[MIPS_CP0_CONFIG][7])
#define kvm_write_c0_guest_config(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][0] = (val))
#define kvm_write_c0_guest_config1(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][1] = (val))
#define kvm_write_c0_guest_config2(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][2] = (val))
#define kvm_write_c0_guest_config3(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][3] = (val))
#define kvm_write_c0_guest_config7(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][7] = (val))
#define kvm_read_c0_guest_errorepc(cop0) (cop0->reg[MIPS_CP0_ERROR_PC][0])
#define kvm_write_c0_guest_errorepc(cop0, val) (cop0->reg[MIPS_CP0_ERROR_PC][0] = (val))
#define kvm_set_c0_guest_status(cop0, val) (cop0->reg[MIPS_CP0_STATUS][0] |= (val))
#define kvm_clear_c0_guest_status(cop0, val) (cop0->reg[MIPS_CP0_STATUS][0] &= ~(val))
#define kvm_set_c0_guest_cause(cop0, val) (cop0->reg[MIPS_CP0_CAUSE][0] |= (val))
#define kvm_clear_c0_guest_cause(cop0, val) (cop0->reg[MIPS_CP0_CAUSE][0] &= ~(val))
#define kvm_change_c0_guest_cause(cop0, change, val) \
{ \
kvm_clear_c0_guest_cause(cop0, change); \
kvm_set_c0_guest_cause(cop0, ((val) & (change))); \
}
#define kvm_set_c0_guest_ebase(cop0, val) (cop0->reg[MIPS_CP0_PRID][1] |= (val))
#define kvm_clear_c0_guest_ebase(cop0, val) (cop0->reg[MIPS_CP0_PRID][1] &= ~(val))
#define kvm_change_c0_guest_ebase(cop0, change, val) \
{ \
kvm_clear_c0_guest_ebase(cop0, change); \
kvm_set_c0_guest_ebase(cop0, ((val) & (change))); \
}
struct kvm_mips_callbacks {
int (*handle_cop_unusable) (struct kvm_vcpu *vcpu);
int (*handle_tlb_mod) (struct kvm_vcpu *vcpu);
int (*handle_tlb_ld_miss) (struct kvm_vcpu *vcpu);
int (*handle_tlb_st_miss) (struct kvm_vcpu *vcpu);
int (*handle_addr_err_st) (struct kvm_vcpu *vcpu);
int (*handle_addr_err_ld) (struct kvm_vcpu *vcpu);
int (*handle_syscall) (struct kvm_vcpu *vcpu);
int (*handle_res_inst) (struct kvm_vcpu *vcpu);
int (*handle_break) (struct kvm_vcpu *vcpu);
int (*vm_init) (struct kvm *kvm);
int (*vcpu_init) (struct kvm_vcpu *vcpu);
int (*vcpu_setup) (struct kvm_vcpu *vcpu);
gpa_t(*gva_to_gpa) (gva_t gva);
void (*queue_timer_int) (struct kvm_vcpu *vcpu);
void (*dequeue_timer_int) (struct kvm_vcpu *vcpu);
void (*queue_io_int) (struct kvm_vcpu *vcpu,
struct kvm_mips_interrupt *irq);
void (*dequeue_io_int) (struct kvm_vcpu *vcpu,
struct kvm_mips_interrupt *irq);
int (*irq_deliver) (struct kvm_vcpu *vcpu, unsigned int priority,
uint32_t cause);
int (*irq_clear) (struct kvm_vcpu *vcpu, unsigned int priority,
uint32_t cause);
int (*vcpu_ioctl_get_regs) (struct kvm_vcpu *vcpu,
struct kvm_regs *regs);
int (*vcpu_ioctl_set_regs) (struct kvm_vcpu *vcpu,
struct kvm_regs *regs);
};
extern struct kvm_mips_callbacks *kvm_mips_callbacks;
int kvm_mips_emulation_init(struct kvm_mips_callbacks **install_callbacks);
/* Debug: dump vcpu state */
int kvm_arch_vcpu_dump_regs(struct kvm_vcpu *vcpu);
/* Trampoline ASM routine to start running in "Guest" context */
extern int __kvm_mips_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu);
/* TLB handling */
uint32_t kvm_get_kernel_asid(struct kvm_vcpu *vcpu);
uint32_t kvm_get_user_asid(struct kvm_vcpu *vcpu);
uint32_t kvm_get_commpage_asid (struct kvm_vcpu *vcpu);
extern int kvm_mips_handle_kseg0_tlb_fault(unsigned long badbaddr,
struct kvm_vcpu *vcpu);
extern int kvm_mips_handle_commpage_tlb_fault(unsigned long badvaddr,
struct kvm_vcpu *vcpu);
extern int kvm_mips_handle_mapped_seg_tlb_fault(struct kvm_vcpu *vcpu,
struct kvm_mips_tlb *tlb,
unsigned long *hpa0,
unsigned long *hpa1);
extern enum emulation_result kvm_mips_handle_tlbmiss(unsigned long cause,
uint32_t *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
extern enum emulation_result kvm_mips_handle_tlbmod(unsigned long cause,
uint32_t *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
extern void kvm_mips_dump_host_tlbs(void);
extern void kvm_mips_dump_guest_tlbs(struct kvm_vcpu *vcpu);
extern void kvm_mips_dump_shadow_tlbs(struct kvm_vcpu *vcpu);
extern void kvm_mips_flush_host_tlb(int skip_kseg0);
extern int kvm_mips_host_tlb_inv(struct kvm_vcpu *vcpu, unsigned long entryhi);
extern int kvm_mips_host_tlb_inv_index(struct kvm_vcpu *vcpu, int index);
extern int kvm_mips_guest_tlb_lookup(struct kvm_vcpu *vcpu,
unsigned long entryhi);
extern int kvm_mips_host_tlb_lookup(struct kvm_vcpu *vcpu, unsigned long vaddr);
extern unsigned long kvm_mips_translate_guest_kseg0_to_hpa(struct kvm_vcpu *vcpu,
unsigned long gva);
extern void kvm_get_new_mmu_context(struct mm_struct *mm, unsigned long cpu,
struct kvm_vcpu *vcpu);
extern void kvm_shadow_tlb_put(struct kvm_vcpu *vcpu);
extern void kvm_shadow_tlb_load(struct kvm_vcpu *vcpu);
extern void kvm_local_flush_tlb_all(void);
extern void kvm_mips_init_shadow_tlb(struct kvm_vcpu *vcpu);
extern void kvm_mips_alloc_new_mmu_context(struct kvm_vcpu *vcpu);
extern void kvm_mips_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
extern void kvm_mips_vcpu_put(struct kvm_vcpu *vcpu);
/* Emulation */
uint32_t kvm_get_inst(uint32_t *opc, struct kvm_vcpu *vcpu);
enum emulation_result update_pc(struct kvm_vcpu *vcpu, uint32_t cause);
extern enum emulation_result kvm_mips_emulate_inst(unsigned long cause,
uint32_t *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
extern enum emulation_result kvm_mips_emulate_syscall(unsigned long cause,
uint32_t *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
extern enum emulation_result kvm_mips_emulate_tlbmiss_ld(unsigned long cause,
uint32_t *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
extern enum emulation_result kvm_mips_emulate_tlbinv_ld(unsigned long cause,
uint32_t *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
extern enum emulation_result kvm_mips_emulate_tlbmiss_st(unsigned long cause,
uint32_t *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
extern enum emulation_result kvm_mips_emulate_tlbinv_st(unsigned long cause,
uint32_t *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
extern enum emulation_result kvm_mips_emulate_tlbmod(unsigned long cause,
uint32_t *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
extern enum emulation_result kvm_mips_emulate_fpu_exc(unsigned long cause,
uint32_t *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
extern enum emulation_result kvm_mips_handle_ri(unsigned long cause,
uint32_t *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
extern enum emulation_result kvm_mips_emulate_ri_exc(unsigned long cause,
uint32_t *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
extern enum emulation_result kvm_mips_emulate_bp_exc(unsigned long cause,
uint32_t *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
extern enum emulation_result kvm_mips_complete_mmio_load(struct kvm_vcpu *vcpu,
struct kvm_run *run);
enum emulation_result kvm_mips_emulate_count(struct kvm_vcpu *vcpu);
enum emulation_result kvm_mips_check_privilege(unsigned long cause,
uint32_t *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
enum emulation_result kvm_mips_emulate_cache(uint32_t inst,
uint32_t *opc,
uint32_t cause,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
enum emulation_result kvm_mips_emulate_CP0(uint32_t inst,
uint32_t *opc,
uint32_t cause,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
enum emulation_result kvm_mips_emulate_store(uint32_t inst,
uint32_t cause,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
enum emulation_result kvm_mips_emulate_load(uint32_t inst,
uint32_t cause,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
/* Dynamic binary translation */
extern int kvm_mips_trans_cache_index(uint32_t inst, uint32_t *opc,
struct kvm_vcpu *vcpu);
extern int kvm_mips_trans_cache_va(uint32_t inst, uint32_t *opc,
struct kvm_vcpu *vcpu);
extern int kvm_mips_trans_mfc0(uint32_t inst, uint32_t *opc,
struct kvm_vcpu *vcpu);
extern int kvm_mips_trans_mtc0(uint32_t inst, uint32_t *opc,
struct kvm_vcpu *vcpu);
/* Misc */
extern void mips32_SyncICache(unsigned long addr, unsigned long size);
extern int kvm_mips_dump_stats(struct kvm_vcpu *vcpu);
extern unsigned long kvm_mips_get_ramsize(struct kvm *kvm);
#endif /* __MIPS_KVM_HOST_H__ */
arch/mips/include/asm/mach-generic/spaces.h
View file @ 5e0e61dd
......@@ -20,14 +20,21 @@
#endif
#ifdef CONFIG_32BIT
#ifdef CONFIG_KVM_GUEST
#define CAC_BASE _AC(0x40000000, UL)
#else
#define CAC_BASE _AC(0x80000000, UL)
#endif
#define IO_BASE _AC(0xa0000000, UL)
#define UNCAC_BASE _AC(0xa0000000, UL)
#ifndef MAP_BASE
#ifdef CONFIG_KVM_GUEST
#define MAP_BASE _AC(0x60000000, UL)
#else
#define MAP_BASE _AC(0xc0000000, UL)
#endif
#endif
/*
* Memory above this physical address will be considered highmem.
......
arch/mips/include/asm/mmu_context.h
View file @ 5e0e61dd
......@@ -111,15 +111,21 @@ static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
static inline void
get_new_mmu_context(struct mm_struct *mm, unsigned long cpu)
{
extern void kvm_local_flush_tlb_all(void);
unsigned long asid = asid_cache(cpu);
if (! ((asid += ASID_INC) & ASID_MASK) ) {
if (cpu_has_vtag_icache)
flush_icache_all();
#ifdef CONFIG_VIRTUALIZATION
kvm_local_flush_tlb_all(); /* start new asid cycle */
#else
local_flush_tlb_all(); /* start new asid cycle */
#endif
if (!asid) /* fix version if needed */
asid = ASID_FIRST_VERSION;
}
cpu_context(cpu, mm) = asid_cache(cpu) = asid;
}
......
arch/mips/include/asm/processor.h
View file @ 5e0e61dd
......@@ -44,11 +44,16 @@ extern unsigned int vced_count, vcei_count;
#define SPECIAL_PAGES_SIZE PAGE_SIZE
#ifdef CONFIG_32BIT
#ifdef CONFIG_KVM_GUEST
/* User space process size is limited to 1GB in KVM Guest Mode */
#define TASK_SIZE 0x3fff8000UL
#else
/*
* User space process size: 2GB. This is hardcoded into a few places,
* so don't change it unless you know what you are doing.
*/
#define TASK_SIZE 0x7fff8000UL
#endif
#ifdef __KERNEL__
#define STACK_TOP_MAX TASK_SIZE
......
arch/mips/include/asm/sn/sn_private.h
View file @ 5e0e61dd
......@@ -14,6 +14,6 @@ extern void install_cpu_nmi_handler(int slice);
extern void install_ipi(void);
extern void setup_replication_mask(void);
extern void replicate_kernel_text(void);
extern pfn_t node_getfirstfree(cnodeid_t);
extern unsigned long node_getfirstfree(cnodeid_t);
#endif /* __ASM_SN_SN_PRIVATE_H */
arch/mips/include/asm/sn/types.h
View file @ 5e0e61dd
......@@ -19,7 +19,6 @@ typedef signed char partid_t; /* partition ID type */
typedef signed short moduleid_t; /* user-visible module number type */
typedef signed short cmoduleid_t; /* kernel compact module id type */
typedef unsigned char clusterid_t; /* Clusterid of the cell */
typedef unsigned long pfn_t;
typedef dev_t vertex_hdl_t; /* hardware graph vertex handle */
......
arch/mips/include/asm/uaccess.h
View file @ 5e0e61dd
......@@ -23,7 +23,11 @@
*/
#ifdef CONFIG_32BIT
#define __UA_LIMIT 0x80000000UL
#ifdef CONFIG_KVM_GUEST
#define __UA_LIMIT 0x40000000UL
#else
#define __UA_LIMIT 0x80000000UL
#endif
#define __UA_ADDR ".word"
#define __UA_LA "la"
......@@ -55,8 +59,13 @@ extern u64 __ua_limit;
* address in this range it's the process's problem, not ours :-)
*/
#ifdef CONFIG_KVM_GUEST
#define KERNEL_DS ((mm_segment_t) { 0x80000000UL })
#define USER_DS ((mm_segment_t) { 0xC0000000UL })
#else
#define KERNEL_DS ((mm_segment_t) { 0UL })
#define USER_DS ((mm_segment_t) { __UA_LIMIT })
#endif
#define VERIFY_READ 0
#define VERIFY_WRITE 1
......
arch/mips/kernel/asm-offsets.c
View file @ 5e0e61dd
......@@ -17,6 +17,8 @@
#include <asm/ptrace.h>
#include <asm/processor.h>
#include <linux/kvm_host.h>
void output_ptreg_defines(void)
{
COMMENT("MIPS pt_regs offsets.");
......@@ -328,3 +330,67 @@ void output_pbe_defines(void)
BLANK();
}
#endif
void output_kvm_defines(void)
{
COMMENT(" KVM/MIPS Specfic offsets. ");
DEFINE(VCPU_ARCH_SIZE, sizeof(struct kvm_vcpu_arch));
OFFSET(VCPU_RUN, kvm_vcpu, run);
OFFSET(VCPU_HOST_ARCH, kvm_vcpu, arch);
OFFSET(VCPU_HOST_EBASE, kvm_vcpu_arch, host_ebase);
OFFSET(VCPU_GUEST_EBASE, kvm_vcpu_arch, guest_ebase);
OFFSET(VCPU_HOST_STACK, kvm_vcpu_arch, host_stack);
OFFSET(VCPU_HOST_GP, kvm_vcpu_arch, host_gp);
OFFSET(VCPU_HOST_CP0_BADVADDR, kvm_vcpu_arch, host_cp0_badvaddr);
OFFSET(VCPU_HOST_CP0_CAUSE, kvm_vcpu_arch, host_cp0_cause);
OFFSET(VCPU_HOST_EPC, kvm_vcpu_arch, host_cp0_epc);
OFFSET(VCPU_HOST_ENTRYHI, kvm_vcpu_arch, host_cp0_entryhi);
OFFSET(VCPU_GUEST_INST, kvm_vcpu_arch, guest_inst);
OFFSET(VCPU_R0, kvm_vcpu_arch, gprs[0]);
OFFSET(VCPU_R1, kvm_vcpu_arch, gprs[1]);
OFFSET(VCPU_R2, kvm_vcpu_arch, gprs[2]);
OFFSET(VCPU_R3, kvm_vcpu_arch, gprs[3]);
OFFSET(VCPU_R4, kvm_vcpu_arch, gprs[4]);
OFFSET(VCPU_R5, kvm_vcpu_arch, gprs[5]);
OFFSET(VCPU_R6, kvm_vcpu_arch, gprs[6]);
OFFSET(VCPU_R7, kvm_vcpu_arch, gprs[7]);
OFFSET(VCPU_R8, kvm_vcpu_arch, gprs[8]);
OFFSET(VCPU_R9, kvm_vcpu_arch, gprs[9]);
OFFSET(VCPU_R10, kvm_vcpu_arch, gprs[10]);
OFFSET(VCPU_R11, kvm_vcpu_arch, gprs[11]);
OFFSET(VCPU_R12, kvm_vcpu_arch, gprs[12]);
OFFSET(VCPU_R13, kvm_vcpu_arch, gprs[13]);
OFFSET(VCPU_R14, kvm_vcpu_arch, gprs[14]);
OFFSET(VCPU_R15, kvm_vcpu_arch, gprs[15]);
OFFSET(VCPU_R16, kvm_vcpu_arch, gprs[16]);
OFFSET(VCPU_R17, kvm_vcpu_arch, gprs[17]);
OFFSET(VCPU_R18, kvm_vcpu_arch, gprs[18]);
OFFSET(VCPU_R19, kvm_vcpu_arch, gprs[19]);
OFFSET(VCPU_R20, kvm_vcpu_arch, gprs[20]);
OFFSET(VCPU_R21, kvm_vcpu_arch, gprs[21]);
OFFSET(VCPU_R22, kvm_vcpu_arch, gprs[22]);
OFFSET(VCPU_R23, kvm_vcpu_arch, gprs[23]);
OFFSET(VCPU_R24, kvm_vcpu_arch, gprs[24]);
OFFSET(VCPU_R25, kvm_vcpu_arch, gprs[25]);
OFFSET(VCPU_R26, kvm_vcpu_arch, gprs[26]);
OFFSET(VCPU_R27, kvm_vcpu_arch, gprs[27]);
OFFSET(VCPU_R28, kvm_vcpu_arch, gprs[28]);
OFFSET(VCPU_R29, kvm_vcpu_arch, gprs[29]);
OFFSET(VCPU_R30, kvm_vcpu_arch, gprs[30]);
OFFSET(VCPU_R31, kvm_vcpu_arch, gprs[31]);
OFFSET(VCPU_LO, kvm_vcpu_arch, lo);
OFFSET(VCPU_HI, kvm_vcpu_arch, hi);
OFFSET(VCPU_PC, kvm_vcpu_arch, pc);
OFFSET(VCPU_COP0, kvm_vcpu_arch, cop0);
OFFSET(VCPU_GUEST_KERNEL_ASID, kvm_vcpu_arch, guest_kernel_asid);
OFFSET(VCPU_GUEST_USER_ASID, kvm_vcpu_arch, guest_user_asid);
OFFSET(COP0_TLB_HI, mips_coproc, reg[MIPS_CP0_TLB_HI][0]);
OFFSET(COP0_STATUS, mips_coproc, reg[MIPS_CP0_STATUS][0]);
BLANK();
}
arch/mips/kernel/binfmt_elfo32.c
View file @ 5e0e61dd
......@@ -48,7 +48,11 @@ typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
__res; \
})
#ifdef CONFIG_KVM_GUEST
#define TASK32_SIZE 0x3fff8000UL
#else
#define TASK32_SIZE 0x7fff8000UL
#endif
#undef ELF_ET_DYN_BASE
#define ELF_ET_DYN_BASE (TASK32_SIZE / 3 * 2)
......
arch/mips/kernel/cevt-r4k.c
View file @ 5e0e61dd
......@@ -118,6 +118,10 @@ int c0_compare_int_usable(void)
unsigned int delta;
unsigned int cnt;
#ifdef CONFIG_KVM_GUEST
return 1;
#endif
/*
* IP7 already pending? Try to clear it by acking the timer.
*/
......
arch/mips/kernel/smp.c
View file @ 5e0e61dd
......@@ -83,6 +83,7 @@ static inline void set_cpu_sibling_map(int cpu)
}
struct plat_smp_ops *mp_ops;
EXPORT_SYMBOL(mp_ops);
__cpuinit void register_smp_ops(struct plat_smp_ops *ops)
{
......
arch/mips/kernel/traps.c
View file @ 5e0e61dd
......@@ -1712,7 +1712,12 @@ void __init trap_init(void)
ebase = (unsigned long)
__alloc_bootmem(size, 1 << fls(size), 0);
} else {
ebase = CKSEG0;
#ifdef CONFIG_KVM_GUEST
#define KVM_GUEST_KSEG0 0x40000000
ebase = KVM_GUEST_KSEG0;
#else
ebase = CKSEG0;
#endif
if (cpu_has_mips_r2)
ebase += (read_c0_ebase() & 0x3ffff000);
}
......
arch/mips/kvm/00README.txt 0 → 100644
View file @ 5e0e61dd
KVM/MIPS Trap & Emulate Release Notes
=====================================
(1) KVM/MIPS should support MIPS32R2 and beyond. It has been tested on the following platforms:
Malta Board with FPGA based 34K
Sigma Designs TangoX board with a 24K based 8654 SoC.
Malta Board with 74K @ 1GHz
(2) Both Guest kernel and Guest Userspace execute in UM.
Guest User address space: 0x00000000 -> 0x40000000
Guest Kernel Unmapped: 0x40000000 -> 0x60000000
Guest Kernel Mapped: 0x60000000 -> 0x80000000
Guest Usermode virtual memory is limited to 1GB.
(2) 16K Page Sizes: Both Host Kernel and Guest Kernel should have the same page size, currently at least 16K.
Note that due to cache aliasing issues, 4K page sizes are NOT supported.
(3) No HugeTLB Support
Both the host kernel and Guest kernel should have the page size set to 16K.
This will be implemented in a future release.
(4) KVM/MIPS does not have support for SMP Guests
Linux-3.7-rc2 based SMP guest hangs due to the following code sequence in the generated TLB handlers:
LL/TLBP/SC. Since the TLBP instruction causes a trap the reservation gets cleared
when we ERET back to the guest. This causes the guest to hang in an infinite loop.
This will be fixed in a future release.
(5) Use Host FPU
Currently KVM/MIPS emulates a 24K CPU without a FPU.
This will be fixed in a future release
arch/mips/kvm/Kconfig 0 → 100644
View file @ 5e0e61dd
#
# KVM configuration
#
source "virt/kvm/Kconfig"
menuconfig VIRTUALIZATION
bool "Virtualization"
depends on HAVE_KVM
---help---
Say Y here to get to see options for using your Linux host to run
other operating systems inside virtual machines (guests).
This option alone does not add any kernel code.
If you say N, all options in this submenu will be skipped and disabled.
if VIRTUALIZATION
config KVM
tristate "Kernel-based Virtual Machine (KVM) support"
depends on HAVE_KVM
select PREEMPT_NOTIFIERS
select ANON_INODES
select KVM_MMIO
---help---
Support for hosting Guest kernels.
Currently supported on MIPS32 processors.
config KVM_MIPS_DYN_TRANS
bool "KVM/MIPS: Dynamic binary translation to reduce traps"
depends on KVM
---help---
When running in Trap & Emulate mode patch privileged
instructions to reduce the number of traps.
If unsure, say Y.
config KVM_MIPS_DEBUG_COP0_COUNTERS
bool "Maintain counters for COP0 accesses"
depends on KVM
---help---
Maintain statistics for Guest COP0 accesses.
A histogram of COP0 accesses is printed when the VM is
shutdown.
If unsure, say N.
source drivers/vhost/Kconfig
endif # VIRTUALIZATION
arch/mips/kvm/Makefile 0 → 100644
View file @ 5e0e61dd
# Makefile for KVM support for MIPS
#
common-objs = $(addprefix ../../../virt/kvm/, kvm_main.o coalesced_mmio.o)
EXTRA_CFLAGS += -Ivirt/kvm -Iarch/mips/kvm
kvm-objs := $(common-objs) kvm_mips.o kvm_mips_emul.o kvm_locore.o \
kvm_mips_int.o kvm_mips_stats.o kvm_mips_commpage.o \
kvm_mips_dyntrans.o kvm_trap_emul.o
obj-$(CONFIG_KVM) += kvm.o
obj-y += kvm_cb.o kvm_tlb.o
arch/mips/kvm/kvm_cb.c 0 → 100644
View file @ 5e0e61dd
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
* Authors: Yann Le Du <ledu@kymasys.com>
*/
#include <linux/export.h>
#include <linux/kvm_host.h>
struct kvm_mips_callbacks *kvm_mips_callbacks;
EXPORT_SYMBOL(kvm_mips_callbacks);
arch/mips/kvm/kvm_locore.S 0 → 100644
View file @ 5e0e61dd
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Main entry point for the guest, exception handling.
*
* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
* Authors: Sanjay Lal <sanjayl@kymasys.com>
*/
#include <asm/asm.h>
#include <asm/asmmacro.h>
#include <asm/regdef.h>
#include <asm/mipsregs.h>
#include <asm/stackframe.h>
#include <asm/asm-offsets.h>
#define _C_LABEL(x) x
#define MIPSX(name) mips32_ ## name
#define CALLFRAME_SIZ 32
/*
* VECTOR
* exception vector entrypoint
*/
#define VECTOR(x, regmask) \
.ent _C_LABEL(x),0; \
EXPORT(x);
#define VECTOR_END(x) \
EXPORT(x);
/* Overload, Danger Will Robinson!! */
#define PT_HOST_ASID PT_BVADDR
#define PT_HOST_USERLOCAL PT_EPC
#define CP0_DDATA_LO $28,3
#define CP0_EBASE $15,1
#define CP0_INTCTL $12,1
#define CP0_SRSCTL $12,2
#define CP0_SRSMAP $12,3
#define CP0_HWRENA $7,0
/* Resume Flags */
#define RESUME_FLAG_HOST (1<<1) /* Resume host? */
#define RESUME_GUEST 0
#define RESUME_HOST RESUME_FLAG_HOST
/*
* __kvm_mips_vcpu_run: entry point to the guest
* a0: run
* a1: vcpu
*/
FEXPORT(__kvm_mips_vcpu_run)
.set push
.set noreorder
.set noat
/* k0/k1 not being used in host kernel context */
addiu k1,sp, -PT_SIZE
LONG_S $0, PT_R0(k1)
LONG_S $1, PT_R1(k1)
LONG_S $2, PT_R2(k1)
LONG_S $3, PT_R3(k1)
LONG_S $4, PT_R4(k1)
LONG_S $5, PT_R5(k1)
LONG_S $6, PT_R6(k1)
LONG_S $7, PT_R7(k1)
LONG_S $8, PT_R8(k1)
LONG_S $9, PT_R9(k1)
LONG_S $10, PT_R10(k1)
LONG_S $11, PT_R11(k1)
LONG_S $12, PT_R12(k1)
LONG_S $13, PT_R13(k1)
LONG_S $14, PT_R14(k1)
LONG_S $15, PT_R15(k1)
LONG_S $16, PT_R16(k1)
LONG_S $17, PT_R17(k1)
LONG_S $18, PT_R18(k1)
LONG_S $19, PT_R19(k1)
LONG_S $20, PT_R20(k1)
LONG_S $21, PT_R21(k1)
LONG_S $22, PT_R22(k1)
LONG_S $23, PT_R23(k1)
LONG_S $24, PT_R24(k1)
LONG_S $25, PT_R25(k1)
/* XXXKYMA k0/k1 not saved, not being used if we got here through an ioctl() */
LONG_S $28, PT_R28(k1)
LONG_S $29, PT_R29(k1)
LONG_S $30, PT_R30(k1)
LONG_S $31, PT_R31(k1)
/* Save hi/lo */
mflo v0
LONG_S v0, PT_LO(k1)
mfhi v1
LONG_S v1, PT_HI(k1)
/* Save host status */
mfc0 v0, CP0_STATUS
LONG_S v0, PT_STATUS(k1)
/* Save host ASID, shove it into the BVADDR location */
mfc0 v1,CP0_ENTRYHI
andi v1, 0xff
LONG_S v1, PT_HOST_ASID(k1)
/* Save DDATA_LO, will be used to store pointer to vcpu */
mfc0 v1, CP0_DDATA_LO
LONG_S v1, PT_HOST_USERLOCAL(k1)
/* DDATA_LO has pointer to vcpu */
mtc0 a1,CP0_DDATA_LO
/* Offset into vcpu->arch */
addiu k1, a1, VCPU_HOST_ARCH
/* Save the host stack to VCPU, used for exception processing when we exit from the Guest */
LONG_S sp, VCPU_HOST_STACK(k1)
/* Save the kernel gp as well */
LONG_S gp, VCPU_HOST_GP(k1)
/* Setup status register for running the guest in UM, interrupts are disabled */
li k0,(ST0_EXL | KSU_USER| ST0_BEV)
mtc0 k0,CP0_STATUS
ehb
/* load up the new EBASE */
LONG_L k0, VCPU_GUEST_EBASE(k1)
mtc0 k0,CP0_EBASE
/* Now that the new EBASE has been loaded, unset BEV, set interrupt mask as it was
* but make sure that timer interrupts are enabled
*/
li k0,(ST0_EXL | KSU_USER | ST0_IE)
andi v0, v0, ST0_IM
or k0, k0, v0
mtc0 k0,CP0_STATUS
ehb
/* Set Guest EPC */
LONG_L t0, VCPU_PC(k1)
mtc0 t0, CP0_EPC
FEXPORT(__kvm_mips_load_asid)
/* Set the ASID for the Guest Kernel */
sll t0, t0, 1 /* with kseg0 @ 0x40000000, kernel */
/* addresses shift to 0x80000000 */
bltz t0, 1f /* If kernel */
addiu t1, k1, VCPU_GUEST_KERNEL_ASID /* (BD) */
addiu t1, k1, VCPU_GUEST_USER_ASID /* else user */
1:
/* t1: contains the base of the ASID array, need to get the cpu id */
LONG_L t2, TI_CPU($28) /* smp_processor_id */
sll t2, t2, 2 /* x4 */
addu t3, t1, t2
LONG_L k0, (t3)
andi k0, k0, 0xff
mtc0 k0,CP0_ENTRYHI
ehb
/* Disable RDHWR access */
mtc0 zero, CP0_HWRENA
/* Now load up the Guest Context from VCPU */
LONG_L $1, VCPU_R1(k1)
LONG_L $2, VCPU_R2(k1)
LONG_L $3, VCPU_R3(k1)
LONG_L $4, VCPU_R4(k1)
LONG_L $5, VCPU_R5(k1)
LONG_L $6, VCPU_R6(k1)
LONG_L $7, VCPU_R7(k1)
LONG_L $8, VCPU_R8(k1)
LONG_L $9, VCPU_R9(k1)
LONG_L $10, VCPU_R10(k1)
LONG_L $11, VCPU_R11(k1)
LONG_L $12, VCPU_R12(k1)
LONG_L $13, VCPU_R13(k1)
LONG_L $14, VCPU_R14(k1)
LONG_L $15, VCPU_R15(k1)
LONG_L $16, VCPU_R16(k1)
LONG_L $17, VCPU_R17(k1)
LONG_L $18, VCPU_R18(k1)
LONG_L $19, VCPU_R19(k1)
LONG_L $20, VCPU_R20(k1)
LONG_L $21, VCPU_R21(k1)
LONG_L $22, VCPU_R22(k1)
LONG_L $23, VCPU_R23(k1)
LONG_L $24, VCPU_R24(k1)
LONG_L $25, VCPU_R25(k1)
/* k0/k1 loaded up later */
LONG_L $28, VCPU_R28(k1)
LONG_L $29, VCPU_R29(k1)
LONG_L $30, VCPU_R30(k1)
LONG_L $31, VCPU_R31(k1)
/* Restore hi/lo */
LONG_L k0, VCPU_LO(k1)
mtlo k0
LONG_L k0, VCPU_HI(k1)
mthi k0
FEXPORT(__kvm_mips_load_k0k1)
/* Restore the guest's k0/k1 registers */
LONG_L k0, VCPU_R26(k1)
LONG_L k1, VCPU_R27(k1)
/* Jump to guest */
eret
.set pop
VECTOR(MIPSX(exception), unknown)
/*
* Find out what mode we came from and jump to the proper handler.
*/
.set push
.set noat
.set noreorder
mtc0 k0, CP0_ERROREPC #01: Save guest k0
ehb #02:
mfc0 k0, CP0_EBASE #02: Get EBASE
srl k0, k0, 10 #03: Get rid of CPUNum
sll k0, k0, 10 #04
LONG_S k1, 0x3000(k0) #05: Save k1 @ offset 0x3000
addiu k0, k0, 0x2000 #06: Exception handler is installed @ offset 0x2000
j k0 #07: jump to the function
nop #08: branch delay slot
.set push
VECTOR_END(MIPSX(exceptionEnd))
.end MIPSX(exception)
/*
* Generic Guest exception handler. We end up here when the guest
* does something that causes a trap to kernel mode.
*
*/
NESTED (MIPSX(GuestException), CALLFRAME_SIZ, ra)
.set push
.set noat
.set noreorder
/* Get the VCPU pointer from DDTATA_LO */
mfc0 k1, CP0_DDATA_LO
addiu k1, k1, VCPU_HOST_ARCH
/* Start saving Guest context to VCPU */
LONG_S $0, VCPU_R0(k1)
LONG_S $1, VCPU_R1(k1)
LONG_S $2, VCPU_R2(k1)
LONG_S $3, VCPU_R3(k1)
LONG_S $4, VCPU_R4(k1)
LONG_S $5, VCPU_R5(k1)
LONG_S $6, VCPU_R6(k1)
LONG_S $7, VCPU_R7(k1)
LONG_S $8, VCPU_R8(k1)
LONG_S $9, VCPU_R9(k1)
LONG_S $10, VCPU_R10(k1)
LONG_S $11, VCPU_R11(k1)
LONG_S $12, VCPU_R12(k1)
LONG_S $13, VCPU_R13(k1)
LONG_S $14, VCPU_R14(k1)
LONG_S $15, VCPU_R15(k1)
LONG_S $16, VCPU_R16(k1)
LONG_S $17,VCPU_R17(k1)
LONG_S $18, VCPU_R18(k1)
LONG_S $19, VCPU_R19(k1)
LONG_S $20, VCPU_R20(k1)
LONG_S $21, VCPU_R21(k1)
LONG_S $22, VCPU_R22(k1)
LONG_S $23, VCPU_R23(k1)
LONG_S $24, VCPU_R24(k1)
LONG_S $25, VCPU_R25(k1)
/* Guest k0/k1 saved later */
LONG_S $28, VCPU_R28(k1)
LONG_S $29, VCPU_R29(k1)
LONG_S $30, VCPU_R30(k1)
LONG_S $31, VCPU_R31(k1)
/* We need to save hi/lo and restore them on
* the way out
*/
mfhi t0
LONG_S t0, VCPU_HI(k1)
mflo t0
LONG_S t0, VCPU_LO(k1)
/* Finally save guest k0/k1 to VCPU */
mfc0 t0, CP0_ERROREPC
LONG_S t0, VCPU_R26(k1)
/* Get GUEST k1 and save it in VCPU */
la t1, ~0x2ff
mfc0 t0, CP0_EBASE
and t0, t0, t1
LONG_L t0, 0x3000(t0)
LONG_S t0, VCPU_R27(k1)
/* Now that context has been saved, we can use other registers */
/* Restore vcpu */
mfc0 a1, CP0_DDATA_LO
move s1, a1
/* Restore run (vcpu->run) */
LONG_L a0, VCPU_RUN(a1)
/* Save pointer to run in s0, will be saved by the compiler */
move s0, a0
/* Save Host level EPC, BadVaddr and Cause to VCPU, useful to process the exception */
mfc0 k0,CP0_EPC
LONG_S k0, VCPU_PC(k1)
mfc0 k0, CP0_BADVADDR
LONG_S k0, VCPU_HOST_CP0_BADVADDR(k1)
mfc0 k0, CP0_CAUSE
LONG_S k0, VCPU_HOST_CP0_CAUSE(k1)
mfc0 k0, CP0_ENTRYHI
LONG_S k0, VCPU_HOST_ENTRYHI(k1)
/* Now restore the host state just enough to run the handlers */
/* Swtich EBASE to the one used by Linux */
/* load up the host EBASE */
mfc0 v0, CP0_STATUS
.set at
or k0, v0, ST0_BEV
.set noat
mtc0 k0, CP0_STATUS
ehb
LONG_L k0, VCPU_HOST_EBASE(k1)
mtc0 k0,CP0_EBASE
/* Now that the new EBASE has been loaded, unset BEV and KSU_USER */
.set at
and v0, v0, ~(ST0_EXL | KSU_USER | ST0_IE)
or v0, v0, ST0_CU0
.set noat
mtc0 v0, CP0_STATUS
ehb
/* Load up host GP */
LONG_L gp, VCPU_HOST_GP(k1)
/* Need a stack before we can jump to "C" */
LONG_L sp, VCPU_HOST_STACK(k1)
/* Saved host state */
addiu sp,sp, -PT_SIZE
/* XXXKYMA do we need to load the host ASID, maybe not because the
* kernel entries are marked GLOBAL, need to verify
*/
/* Restore host DDATA_LO */
LONG_L k0, PT_HOST_USERLOCAL(sp)
mtc0 k0, CP0_DDATA_LO
/* Restore RDHWR access */
la k0, 0x2000000F
mtc0 k0, CP0_HWRENA
/* Jump to handler */
FEXPORT(__kvm_mips_jump_to_handler)
/* XXXKYMA: not sure if this is safe, how large is the stack?? */
/* Now jump to the kvm_mips_handle_exit() to see if we can deal with this in the kernel */
la t9,kvm_mips_handle_exit
jalr.hb t9
addiu sp,sp, -CALLFRAME_SIZ /* BD Slot */
/* Return from handler Make sure interrupts are disabled */
di
ehb
/* XXXKYMA: k0/k1 could have been blown away if we processed an exception
* while we were handling the exception from the guest, reload k1
*/
move k1, s1
addiu k1, k1, VCPU_HOST_ARCH
/* Check return value, should tell us if we are returning to the host (handle I/O etc)
* or resuming the guest
*/
andi t0, v0, RESUME_HOST
bnez t0, __kvm_mips_return_to_host
nop
__kvm_mips_return_to_guest:
/* Put the saved pointer to vcpu (s1) back into the DDATA_LO Register */
mtc0 s1, CP0_DDATA_LO
/* Load up the Guest EBASE to minimize the window where BEV is set */
LONG_L t0, VCPU_GUEST_EBASE(k1)
/* Switch EBASE back to the one used by KVM */
mfc0 v1, CP0_STATUS
.set at
or k0, v1, ST0_BEV
.set noat
mtc0 k0, CP0_STATUS
ehb
mtc0 t0,CP0_EBASE
/* Setup status register for running guest in UM */
.set at
or v1, v1, (ST0_EXL | KSU_USER | ST0_IE)
and v1, v1, ~ST0_CU0
.set noat
mtc0 v1, CP0_STATUS
ehb
/* Set Guest EPC */
LONG_L t0, VCPU_PC(k1)
mtc0 t0, CP0_EPC
/* Set the ASID for the Guest Kernel */
sll t0, t0, 1 /* with kseg0 @ 0x40000000, kernel */
/* addresses shift to 0x80000000 */
bltz t0, 1f /* If kernel */
addiu t1, k1, VCPU_GUEST_KERNEL_ASID /* (BD) */
addiu t1, k1, VCPU_GUEST_USER_ASID /* else user */
1:
/* t1: contains the base of the ASID array, need to get the cpu id */
LONG_L t2, TI_CPU($28) /* smp_processor_id */
sll t2, t2, 2 /* x4 */
addu t3, t1, t2
LONG_L k0, (t3)
andi k0, k0, 0xff
mtc0 k0,CP0_ENTRYHI
ehb
/* Disable RDHWR access */
mtc0 zero, CP0_HWRENA
/* load the guest context from VCPU and return */
LONG_L $0, VCPU_R0(k1)
LONG_L $1, VCPU_R1(k1)
LONG_L $2, VCPU_R2(k1)
LONG_L $3, VCPU_R3(k1)
LONG_L $4, VCPU_R4(k1)
LONG_L $5, VCPU_R5(k1)
LONG_L $6, VCPU_R6(k1)
LONG_L $7, VCPU_R7(k1)
LONG_L $8, VCPU_R8(k1)
LONG_L $9, VCPU_R9(k1)
LONG_L $10, VCPU_R10(k1)
LONG_L $11, VCPU_R11(k1)
LONG_L $12, VCPU_R12(k1)
LONG_L $13, VCPU_R13(k1)
LONG_L $14, VCPU_R14(k1)
LONG_L $15, VCPU_R15(k1)
LONG_L $16, VCPU_R16(k1)
LONG_L $17, VCPU_R17(k1)
LONG_L $18, VCPU_R18(k1)
LONG_L $19, VCPU_R19(k1)
LONG_L $20, VCPU_R20(k1)
LONG_L $21, VCPU_R21(k1)
LONG_L $22, VCPU_R22(k1)
LONG_L $23, VCPU_R23(k1)
LONG_L $24, VCPU_R24(k1)
LONG_L $25, VCPU_R25(k1)
/* $/k1 loaded later */
LONG_L $28, VCPU_R28(k1)
LONG_L $29, VCPU_R29(k1)
LONG_L $30, VCPU_R30(k1)
LONG_L $31, VCPU_R31(k1)
FEXPORT(__kvm_mips_skip_guest_restore)
LONG_L k0, VCPU_HI(k1)
mthi k0
LONG_L k0, VCPU_LO(k1)
mtlo k0
LONG_L k0, VCPU_R26(k1)
LONG_L k1, VCPU_R27(k1)
eret
__kvm_mips_return_to_host:
/* EBASE is already pointing to Linux */
LONG_L k1, VCPU_HOST_STACK(k1)
addiu k1,k1, -PT_SIZE
/* Restore host DDATA_LO */
LONG_L k0, PT_HOST_USERLOCAL(k1)
mtc0 k0, CP0_DDATA_LO
/* Restore host ASID */
LONG_L k0, PT_HOST_ASID(sp)
andi k0, 0xff
mtc0 k0,CP0_ENTRYHI
ehb
/* Load context saved on the host stack */
LONG_L $0, PT_R0(k1)
LONG_L $1, PT_R1(k1)
/* r2/v0 is the return code, shift it down by 2 (arithmetic) to recover the err code */
sra k0, v0, 2
move $2, k0
LONG_L $3, PT_R3(k1)
LONG_L $4, PT_R4(k1)
LONG_L $5, PT_R5(k1)
LONG_L $6, PT_R6(k1)
LONG_L $7, PT_R7(k1)
LONG_L $8, PT_R8(k1)
LONG_L $9, PT_R9(k1)
LONG_L $10, PT_R10(k1)
LONG_L $11, PT_R11(k1)
LONG_L $12, PT_R12(k1)
LONG_L $13, PT_R13(k1)
LONG_L $14, PT_R14(k1)
LONG_L $15, PT_R15(k1)
LONG_L $16, PT_R16(k1)
LONG_L $17, PT_R17(k1)
LONG_L $18, PT_R18(k1)
LONG_L $19, PT_R19(k1)
LONG_L $20, PT_R20(k1)
LONG_L $21, PT_R21(k1)
LONG_L $22, PT_R22(k1)
LONG_L $23, PT_R23(k1)
LONG_L $24, PT_R24(k1)
LONG_L $25, PT_R25(k1)
/* Host k0/k1 were not saved */
LONG_L $28, PT_R28(k1)
LONG_L $29, PT_R29(k1)
LONG_L $30, PT_R30(k1)
LONG_L k0, PT_HI(k1)
mthi k0
LONG_L k0, PT_LO(k1)
mtlo k0
/* Restore RDHWR access */
la k0, 0x2000000F
mtc0 k0, CP0_HWRENA
/* Restore RA, which is the address we will return to */
LONG_L ra, PT_R31(k1)
j ra
nop
.set pop
VECTOR_END(MIPSX(GuestExceptionEnd))
.end MIPSX(GuestException)
MIPSX(exceptions):
####
##### The exception handlers.
#####
.word _C_LABEL(MIPSX(GuestException)) # 0
.word _C_LABEL(MIPSX(GuestException)) # 1
.word _C_LABEL(MIPSX(GuestException)) # 2
.word _C_LABEL(MIPSX(GuestException)) # 3
.word _C_LABEL(MIPSX(GuestException)) # 4
.word _C_LABEL(MIPSX(GuestException)) # 5
.word _C_LABEL(MIPSX(GuestException)) # 6
.word _C_LABEL(MIPSX(GuestException)) # 7
.word _C_LABEL(MIPSX(GuestException)) # 8
.word _C_LABEL(MIPSX(GuestException)) # 9
.word _C_LABEL(MIPSX(GuestException)) # 10
.word _C_LABEL(MIPSX(GuestException)) # 11
.word _C_LABEL(MIPSX(GuestException)) # 12
.word _C_LABEL(MIPSX(GuestException)) # 13
.word _C_LABEL(MIPSX(GuestException)) # 14
.word _C_LABEL(MIPSX(GuestException)) # 15
.word _C_LABEL(MIPSX(GuestException)) # 16
.word _C_LABEL(MIPSX(GuestException)) # 17
.word _C_LABEL(MIPSX(GuestException)) # 18
.word _C_LABEL(MIPSX(GuestException)) # 19
.word _C_LABEL(MIPSX(GuestException)) # 20
.word _C_LABEL(MIPSX(GuestException)) # 21
.word _C_LABEL(MIPSX(GuestException)) # 22
.word _C_LABEL(MIPSX(GuestException)) # 23
.word _C_LABEL(MIPSX(GuestException)) # 24
.word _C_LABEL(MIPSX(GuestException)) # 25
.word _C_LABEL(MIPSX(GuestException)) # 26
.word _C_LABEL(MIPSX(GuestException)) # 27
.word _C_LABEL(MIPSX(GuestException)) # 28
.word _C_LABEL(MIPSX(GuestException)) # 29
.word _C_LABEL(MIPSX(GuestException)) # 30
.word _C_LABEL(MIPSX(GuestException)) # 31
/* This routine makes changes to the instruction stream effective to the hardware.
* It should be called after the instruction stream is written.
* On return, the new instructions are effective.
* Inputs:
* a0 = Start address of new instruction stream
* a1 = Size, in bytes, of new instruction stream
*/
#define HW_SYNCI_Step $1
LEAF(MIPSX(SyncICache))
.set push
.set mips32r2
beq a1, zero, 20f
nop
addu a1, a0, a1
rdhwr v0, HW_SYNCI_Step
beq v0, zero, 20f
nop
10:
synci 0(a0)
addu a0, a0, v0
sltu v1, a0, a1
bne v1, zero, 10b
nop
sync
20:
jr.hb ra
nop
.set pop
END(MIPSX(SyncICache))
arch/mips/kvm/kvm_mips.c 0 → 100644
View file @ 5e0e61dd
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* KVM/MIPS: MIPS specific KVM APIs
*
* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
* Authors: Sanjay Lal <sanjayl@kymasys.com>
*/
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/vmalloc.h>
#include <linux/fs.h>
#include <linux/bootmem.h>
#include <asm/page.h>
#include <asm/cacheflush.h>
#include <asm/mmu_context.h>
#include <linux/kvm_host.h>
#include "kvm_mips_int.h"
#include "kvm_mips_comm.h"
#define CREATE_TRACE_POINTS
#include "trace.h"
#ifndef VECTORSPACING
#define VECTORSPACING 0x100 /* for EI/VI mode */
#endif
#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
struct kvm_stats_debugfs_item debugfs_entries[] = {
{ "wait", VCPU_STAT(wait_exits) },
{ "cache", VCPU_STAT(cache_exits) },
{ "signal", VCPU_STAT(signal_exits) },
{ "interrupt", VCPU_STAT(int_exits) },
{ "cop_unsuable", VCPU_STAT(cop_unusable_exits) },
{ "tlbmod", VCPU_STAT(tlbmod_exits) },
{ "tlbmiss_ld", VCPU_STAT(tlbmiss_ld_exits) },
{ "tlbmiss_st", VCPU_STAT(tlbmiss_st_exits) },
{ "addrerr_st", VCPU_STAT(addrerr_st_exits) },
{ "addrerr_ld", VCPU_STAT(addrerr_ld_exits) },
{ "syscall", VCPU_STAT(syscall_exits) },
{ "resvd_inst", VCPU_STAT(resvd_inst_exits) },
{ "break_inst", VCPU_STAT(break_inst_exits) },
{ "flush_dcache", VCPU_STAT(flush_dcache_exits) },
{ "halt_wakeup", VCPU_STAT(halt_wakeup) },
{NULL}
};
static int kvm_mips_reset_vcpu(struct kvm_vcpu *vcpu)
{
int i;
for_each_possible_cpu(i) {
vcpu->arch.guest_kernel_asid[i] = 0;
vcpu->arch.guest_user_asid[i] = 0;
}
return 0;
}
gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
{
return gfn;
}
/* XXXKYMA: We are simulatoring a processor that has the WII bit set in Config7, so we
* are "runnable" if interrupts are pending
*/
int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
{
return !!(vcpu->arch.pending_exceptions);
}
int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
{
return 1;
}
int kvm_arch_hardware_enable(void *garbage)
{
return 0;
}
void kvm_arch_hardware_disable(void *garbage)
{
}
int kvm_arch_hardware_setup(void)
{
return 0;
}
void kvm_arch_hardware_unsetup(void)
{
}
void kvm_arch_check_processor_compat(void *rtn)
{
int *r = (int *)rtn;
*r = 0;
return;
}
static void kvm_mips_init_tlbs(struct kvm *kvm)
{
unsigned long wired;
/* Add a wired entry to the TLB, it is used to map the commpage to the Guest kernel */
wired = read_c0_wired();
write_c0_wired(wired + 1);
mtc0_tlbw_hazard();
kvm->arch.commpage_tlb = wired;
kvm_debug("[%d] commpage TLB: %d\n", smp_processor_id(),
kvm->arch.commpage_tlb);
}
static void kvm_mips_init_vm_percpu(void *arg)
{
struct kvm *kvm = (struct kvm *)arg;
kvm_mips_init_tlbs(kvm);
kvm_mips_callbacks->vm_init(kvm);
}
int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
{
if (atomic_inc_return(&kvm_mips_instance) == 1) {
kvm_info("%s: 1st KVM instance, setup host TLB parameters\n",
__func__);
on_each_cpu(kvm_mips_init_vm_percpu, kvm, 1);
}
return 0;
}
void kvm_mips_free_vcpus(struct kvm *kvm)
{
unsigned int i;
struct kvm_vcpu *vcpu;
/* Put the pages we reserved for the guest pmap */
for (i = 0; i < kvm->arch.guest_pmap_npages; i++) {
if (kvm->arch.guest_pmap[i] != KVM_INVALID_PAGE)
kvm_mips_release_pfn_clean(kvm->arch.guest_pmap[i]);
}
if (kvm->arch.guest_pmap)
kfree(kvm->arch.guest_pmap);
kvm_for_each_vcpu(i, vcpu, kvm) {
kvm_arch_vcpu_free(vcpu);
}
mutex_lock(&kvm->lock);
for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
kvm->vcpus[i] = NULL;
atomic_set(&kvm->online_vcpus, 0);
mutex_unlock(&kvm->lock);
}
void kvm_arch_sync_events(struct kvm *kvm)
{
}
static void kvm_mips_uninit_tlbs(void *arg)
{
/* Restore wired count */
write_c0_wired(0);
mtc0_tlbw_hazard();
/* Clear out all the TLBs */
kvm_local_flush_tlb_all();
}
void kvm_arch_destroy_vm(struct kvm *kvm)
{
kvm_mips_free_vcpus(kvm);
/* If this is the last instance, restore wired count */
if (atomic_dec_return(&kvm_mips_instance) == 0) {
kvm_info("%s: last KVM instance, restoring TLB parameters\n",
__func__);
on_each_cpu(kvm_mips_uninit_tlbs, NULL, 1);
}
}
long
kvm_arch_dev_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
{
return -EINVAL;
}
void kvm_arch_free_memslot(struct kvm_memory_slot *free,
struct kvm_memory_slot *dont)
{
}
int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
{
return 0;
}
int kvm_arch_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,
struct kvm_memory_slot old,
struct kvm_userspace_memory_region *mem,
bool user_alloc)
{
return 0;
}
void kvm_arch_commit_memory_region(struct kvm *kvm,
struct kvm_userspace_memory_region *mem,
struct kvm_memory_slot old, bool user_alloc)
{
unsigned long npages = 0;
int i, err = 0;
kvm_debug("%s: kvm: %p slot: %d, GPA: %llx, size: %llx, QVA: %llx\n",
__func__, kvm, mem->slot, mem->guest_phys_addr,
mem->memory_size, mem->userspace_addr);
/* Setup Guest PMAP table */
if (!kvm->arch.guest_pmap) {
if (mem->slot == 0)
npages = mem->memory_size >> PAGE_SHIFT;
if (npages) {
kvm->arch.guest_pmap_npages = npages;
kvm->arch.guest_pmap =
kzalloc(npages * sizeof(unsigned long), GFP_KERNEL);
if (!kvm->arch.guest_pmap) {
kvm_err("Failed to allocate guest PMAP");
err = -ENOMEM;
goto out;
}
kvm_info
("Allocated space for Guest PMAP Table (%ld pages) @ %p\n",
npages, kvm->arch.guest_pmap);
/* Now setup the page table */
for (i = 0; i < npages; i++) {
kvm->arch.guest_pmap[i] = KVM_INVALID_PAGE;
}
}
}
out:
return;
}
void kvm_arch_flush_shadow_all(struct kvm *kvm)
{
}
void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
struct kvm_memory_slot *slot)
{
}
void kvm_arch_flush_shadow(struct kvm *kvm)
{
}
struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
{
extern char mips32_exception[], mips32_exceptionEnd[];
extern char mips32_GuestException[], mips32_GuestExceptionEnd[];
int err, size, offset;
void *gebase;
int i;
struct kvm_vcpu *vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL);
if (!vcpu) {
err = -ENOMEM;
goto out;
}
err = kvm_vcpu_init(vcpu, kvm, id);
if (err)
goto out_free_cpu;
kvm_info("kvm @ %p: create cpu %d at %p\n", kvm, id, vcpu);
/* Allocate space for host mode exception handlers that handle
* guest mode exits
*/
if (cpu_has_veic || cpu_has_vint) {
size = 0x200 + VECTORSPACING * 64;
} else {
size = 0x200;
}
/* Save Linux EBASE */
vcpu->arch.host_ebase = (void *)read_c0_ebase();
gebase = kzalloc(ALIGN(size, PAGE_SIZE), GFP_KERNEL);
if (!gebase) {
err = -ENOMEM;
goto out_free_cpu;
}
kvm_info("Allocated %d bytes for KVM Exception Handlers @ %p\n",
ALIGN(size, PAGE_SIZE), gebase);
/* Save new ebase */
vcpu->arch.guest_ebase = gebase;
/* Copy L1 Guest Exception handler to correct offset */
/* TLB Refill, EXL = 0 */
memcpy(gebase, mips32_exception,
mips32_exceptionEnd - mips32_exception);
/* General Exception Entry point */
memcpy(gebase + 0x180, mips32_exception,
mips32_exceptionEnd - mips32_exception);
/* For vectored interrupts poke the exception code @ all offsets 0-7 */
for (i = 0; i < 8; i++) {
kvm_debug("L1 Vectored handler @ %p\n",
gebase + 0x200 + (i * VECTORSPACING));
memcpy(gebase + 0x200 + (i * VECTORSPACING), mips32_exception,
mips32_exceptionEnd - mips32_exception);
}
/* General handler, relocate to unmapped space for sanity's sake */
offset = 0x2000;
kvm_info("Installing KVM Exception handlers @ %p, %#x bytes\n",
gebase + offset,
mips32_GuestExceptionEnd - mips32_GuestException);
memcpy(gebase + offset, mips32_GuestException,
mips32_GuestExceptionEnd - mips32_GuestException);
/* Invalidate the icache for these ranges */
mips32_SyncICache((unsigned long) gebase, ALIGN(size, PAGE_SIZE));
/* Allocate comm page for guest kernel, a TLB will be reserved for mapping GVA @ 0xFFFF8000 to this page */
vcpu->arch.kseg0_commpage = kzalloc(PAGE_SIZE << 1, GFP_KERNEL);
if (!vcpu->arch.kseg0_commpage) {
err = -ENOMEM;
goto out_free_gebase;
}
kvm_info("Allocated COMM page @ %p\n", vcpu->arch.kseg0_commpage);
kvm_mips_commpage_init(vcpu);
/* Init */
vcpu->arch.last_sched_cpu = -1;
/* Start off the timer */
kvm_mips_emulate_count(vcpu);
return vcpu;
out_free_gebase:
kfree(gebase);
out_free_cpu:
kfree(vcpu);
out:
return ERR_PTR(err);
}
void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
{
hrtimer_cancel(&vcpu->arch.comparecount_timer);
kvm_vcpu_uninit(vcpu);
kvm_mips_dump_stats(vcpu);
if (vcpu->arch.guest_ebase)
kfree(vcpu->arch.guest_ebase);
if (vcpu->arch.kseg0_commpage)
kfree(vcpu->arch.kseg0_commpage);
}
void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
{
kvm_arch_vcpu_free(vcpu);
}
int
kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
struct kvm_guest_debug *dbg)
{
return -EINVAL;
}
int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
{
int r = 0;
sigset_t sigsaved;
if (vcpu->sigset_active)
sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
if (vcpu->mmio_needed) {
if (!vcpu->mmio_is_write)
kvm_mips_complete_mmio_load(vcpu, run);
vcpu->mmio_needed = 0;
}
/* Check if we have any exceptions/interrupts pending */
kvm_mips_deliver_interrupts(vcpu,
kvm_read_c0_guest_cause(vcpu->arch.cop0));
local_irq_disable();
kvm_guest_enter();
r = __kvm_mips_vcpu_run(run, vcpu);
kvm_guest_exit();
local_irq_enable();
if (vcpu->sigset_active)
sigprocmask(SIG_SETMASK, &sigsaved, NULL);
return r;
}
int
kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_mips_interrupt *irq)
{
int intr = (int)irq->irq;
struct kvm_vcpu *dvcpu = NULL;
if (intr == 3 || intr == -3 || intr == 4 || intr == -4)
kvm_debug("%s: CPU: %d, INTR: %d\n", __func__, irq->cpu,
(int)intr);
if (irq->cpu == -1)
dvcpu = vcpu;
else
dvcpu = vcpu->kvm->vcpus[irq->cpu];
if (intr == 2 || intr == 3 || intr == 4) {
kvm_mips_callbacks->queue_io_int(dvcpu, irq);
} else if (intr == -2 || intr == -3 || intr == -4) {
kvm_mips_callbacks->dequeue_io_int(dvcpu, irq);
} else {
kvm_err("%s: invalid interrupt ioctl (%d:%d)\n", __func__,
irq->cpu, irq->irq);
return -EINVAL;
}
dvcpu->arch.wait = 0;
if (waitqueue_active(&dvcpu->wq)) {
wake_up_interruptible(&dvcpu->wq);
}
return 0;
}
int
kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
struct kvm_mp_state *mp_state)
{
return -EINVAL;
}
int
kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
struct kvm_mp_state *mp_state)
{
return -EINVAL;
}
long
kvm_arch_vcpu_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
{
struct kvm_vcpu *vcpu = filp->private_data;
void __user *argp = (void __user *)arg;
long r;
int intr;
switch (ioctl) {
case KVM_NMI:
/* Treat the NMI as a CPU reset */
r = kvm_mips_reset_vcpu(vcpu);
break;
case KVM_INTERRUPT:
{
struct kvm_mips_interrupt irq;
r = -EFAULT;
if (copy_from_user(&irq, argp, sizeof(irq)))
goto out;
intr = (int)irq.irq;
kvm_debug("[%d] %s: irq: %d\n", vcpu->vcpu_id, __func__,
irq.irq);
r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
break;
}
default:
r = -EINVAL;
}
out:
return r;
}
/*
* Get (and clear) the dirty memory log for a memory slot.
*/
int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
{
struct kvm_memory_slot *memslot;
unsigned long ga, ga_end;
int is_dirty = 0;
int r;
unsigned long n;
mutex_lock(&kvm->slots_lock);
r = kvm_get_dirty_log(kvm, log, &is_dirty);
if (r)
goto out;
/* If nothing is dirty, don't bother messing with page tables. */
if (is_dirty) {
memslot = &kvm->memslots->memslots[log->slot];
ga = memslot->base_gfn << PAGE_SHIFT;
ga_end = ga + (memslot->npages << PAGE_SHIFT);
printk("%s: dirty, ga: %#lx, ga_end %#lx\n", __func__, ga,
ga_end);
n = kvm_dirty_bitmap_bytes(memslot);
memset(memslot->dirty_bitmap, 0, n);
}
r = 0;
out:
mutex_unlock(&kvm->slots_lock);
return r;
}
long kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
{
long r;
switch (ioctl) {
default:
r = -EINVAL;
}
return r;
}
int kvm_arch_init(void *opaque)
{
int ret;
if (kvm_mips_callbacks) {
kvm_err("kvm: module already exists\n");
return -EEXIST;
}
ret = kvm_mips_emulation_init(&kvm_mips_callbacks);
return ret;
}
void kvm_arch_exit(void)
{
kvm_mips_callbacks = NULL;
}
int
kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
{
return -ENOTSUPP;
}
int
kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
{
return -ENOTSUPP;
}
int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
{
return 0;
}
int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
{
return -ENOTSUPP;
}
int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
{
return -ENOTSUPP;
}
int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
{
return VM_FAULT_SIGBUS;
}
int kvm_dev_ioctl_check_extension(long ext)
{
int r;
switch (ext) {
case KVM_CAP_COALESCED_MMIO:
r = KVM_COALESCED_MMIO_PAGE_OFFSET;
break;
default:
r = 0;
break;
}
return r;
}
int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
{
return kvm_mips_pending_timer(vcpu);
}
int kvm_arch_vcpu_dump_regs(struct kvm_vcpu *vcpu)
{
int i;
struct mips_coproc *cop0;
if (!vcpu)
return -1;
printk("VCPU Register Dump:\n");
printk("\tpc = 0x%08lx\n", vcpu->arch.pc);;
printk("\texceptions: %08lx\n", vcpu->arch.pending_exceptions);
for (i = 0; i < 32; i += 4) {
printk("\tgpr%02d: %08lx %08lx %08lx %08lx\n", i,
vcpu->arch.gprs[i],
vcpu->arch.gprs[i + 1],
vcpu->arch.gprs[i + 2], vcpu->arch.gprs[i + 3]);
}
printk("\thi: 0x%08lx\n", vcpu->arch.hi);
printk("\tlo: 0x%08lx\n", vcpu->arch.lo);
cop0 = vcpu->arch.cop0;
printk("\tStatus: 0x%08lx, Cause: 0x%08lx\n",
kvm_read_c0_guest_status(cop0), kvm_read_c0_guest_cause(cop0));
printk("\tEPC: 0x%08lx\n", kvm_read_c0_guest_epc(cop0));
return 0;
}
int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
{
int i;
for (i = 0; i < 32; i++)
vcpu->arch.gprs[i] = regs->gprs[i];
vcpu->arch.hi = regs->hi;
vcpu->arch.lo = regs->lo;
vcpu->arch.pc = regs->pc;
return kvm_mips_callbacks->vcpu_ioctl_set_regs(vcpu, regs);
}
int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
{
int i;
for (i = 0; i < 32; i++)
regs->gprs[i] = vcpu->arch.gprs[i];
regs->hi = vcpu->arch.hi;
regs->lo = vcpu->arch.lo;
regs->pc = vcpu->arch.pc;
return kvm_mips_callbacks->vcpu_ioctl_get_regs(vcpu, regs);
}
void kvm_mips_comparecount_func(unsigned long data)
{
struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
kvm_mips_callbacks->queue_timer_int(vcpu);
vcpu->arch.wait = 0;
if (waitqueue_active(&vcpu->wq)) {
wake_up_interruptible(&vcpu->wq);
}
}
/*
* low level hrtimer wake routine.
*/
enum hrtimer_restart kvm_mips_comparecount_wakeup(struct hrtimer *timer)
{
struct kvm_vcpu *vcpu;
vcpu = container_of(timer, struct kvm_vcpu, arch.comparecount_timer);
kvm_mips_comparecount_func((unsigned long) vcpu);
hrtimer_forward_now(&vcpu->arch.comparecount_timer,
ktime_set(0, MS_TO_NS(10)));
return HRTIMER_RESTART;
}
int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
{
kvm_mips_callbacks->vcpu_init(vcpu);
hrtimer_init(&vcpu->arch.comparecount_timer, CLOCK_MONOTONIC,
HRTIMER_MODE_REL);
vcpu->arch.comparecount_timer.function = kvm_mips_comparecount_wakeup;
kvm_mips_init_shadow_tlb(vcpu);
return 0;
}
void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
{
return;
}
int
kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, struct kvm_translation *tr)
{
return 0;
}
/* Initial guest state */
int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
{
return kvm_mips_callbacks->vcpu_setup(vcpu);
}
static
void kvm_mips_set_c0_status(void)
{
uint32_t status = read_c0_status();
if (cpu_has_fpu)
status |= (ST0_CU1);
if (cpu_has_dsp)
status |= (ST0_MX);
write_c0_status(status);
ehb();
}
/*
* Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
*/
int kvm_mips_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu)
{
uint32_t cause = vcpu->arch.host_cp0_cause;
uint32_t exccode = (cause >> CAUSEB_EXCCODE) & 0x1f;
uint32_t __user *opc = (uint32_t __user *) vcpu->arch.pc;
unsigned long badvaddr = vcpu->arch.host_cp0_badvaddr;
enum emulation_result er = EMULATE_DONE;
int ret = RESUME_GUEST;
/* Set a default exit reason */
run->exit_reason = KVM_EXIT_UNKNOWN;
run->ready_for_interrupt_injection = 1;
/* Set the appropriate status bits based on host CPU features, before we hit the scheduler */
kvm_mips_set_c0_status();
local_irq_enable();
kvm_debug("kvm_mips_handle_exit: cause: %#x, PC: %p, kvm_run: %p, kvm_vcpu: %p\n",
cause, opc, run, vcpu);
/* Do a privilege check, if in UM most of these exit conditions end up
* causing an exception to be delivered to the Guest Kernel
*/
er = kvm_mips_check_privilege(cause, opc, run, vcpu);
if (er == EMULATE_PRIV_FAIL) {
goto skip_emul;
} else if (er == EMULATE_FAIL) {
run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
ret = RESUME_HOST;
goto skip_emul;
}
switch (exccode) {
case T_INT:
kvm_debug("[%d]T_INT @ %p\n", vcpu->vcpu_id, opc);
++vcpu->stat.int_exits;
trace_kvm_exit(vcpu, INT_EXITS);
if (need_resched()) {
cond_resched();
}
ret = RESUME_GUEST;
break;
case T_COP_UNUSABLE:
kvm_debug("T_COP_UNUSABLE: @ PC: %p\n", opc);
++vcpu->stat.cop_unusable_exits;
trace_kvm_exit(vcpu, COP_UNUSABLE_EXITS);
ret = kvm_mips_callbacks->handle_cop_unusable(vcpu);
/* XXXKYMA: Might need to return to user space */
if (run->exit_reason == KVM_EXIT_IRQ_WINDOW_OPEN) {
ret = RESUME_HOST;
}
break;
case T_TLB_MOD:
++vcpu->stat.tlbmod_exits;
trace_kvm_exit(vcpu, TLBMOD_EXITS);
ret = kvm_mips_callbacks->handle_tlb_mod(vcpu);
break;
case T_TLB_ST_MISS:
kvm_debug
("TLB ST fault: cause %#x, status %#lx, PC: %p, BadVaddr: %#lx\n",
cause, kvm_read_c0_guest_status(vcpu->arch.cop0), opc,
badvaddr);
++vcpu->stat.tlbmiss_st_exits;
trace_kvm_exit(vcpu, TLBMISS_ST_EXITS);
ret = kvm_mips_callbacks->handle_tlb_st_miss(vcpu);
break;
case T_TLB_LD_MISS:
kvm_debug("TLB LD fault: cause %#x, PC: %p, BadVaddr: %#lx\n",
cause, opc, badvaddr);
++vcpu->stat.tlbmiss_ld_exits;
trace_kvm_exit(vcpu, TLBMISS_LD_EXITS);
ret = kvm_mips_callbacks->handle_tlb_ld_miss(vcpu);
break;
case T_ADDR_ERR_ST:
++vcpu->stat.addrerr_st_exits;
trace_kvm_exit(vcpu, ADDRERR_ST_EXITS);
ret = kvm_mips_callbacks->handle_addr_err_st(vcpu);
break;
case T_ADDR_ERR_LD:
++vcpu->stat.addrerr_ld_exits;
trace_kvm_exit(vcpu, ADDRERR_LD_EXITS);
ret = kvm_mips_callbacks->handle_addr_err_ld(vcpu);
break;
case T_SYSCALL:
++vcpu->stat.syscall_exits;
trace_kvm_exit(vcpu, SYSCALL_EXITS);
ret = kvm_mips_callbacks->handle_syscall(vcpu);
break;
case T_RES_INST:
++vcpu->stat.resvd_inst_exits;
trace_kvm_exit(vcpu, RESVD_INST_EXITS);
ret = kvm_mips_callbacks->handle_res_inst(vcpu);
break;
case T_BREAK:
++vcpu->stat.break_inst_exits;
trace_kvm_exit(vcpu, BREAK_INST_EXITS);
ret = kvm_mips_callbacks->handle_break(vcpu);
break;
default:
kvm_err
("Exception Code: %d, not yet handled, @ PC: %p, inst: 0x%08x BadVaddr: %#lx Status: %#lx\n",
exccode, opc, kvm_get_inst(opc, vcpu), badvaddr,
kvm_read_c0_guest_status(vcpu->arch.cop0));
kvm_arch_vcpu_dump_regs(vcpu);
run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
ret = RESUME_HOST;
break;
}
skip_emul:
local_irq_disable();
if (er == EMULATE_DONE && !(ret & RESUME_HOST))
kvm_mips_deliver_interrupts(vcpu, cause);
if (!(ret & RESUME_HOST)) {
/* Only check for signals if not already exiting to userspace */
if (signal_pending(current)) {
run->exit_reason = KVM_EXIT_INTR;
ret = (-EINTR << 2) | RESUME_HOST;
++vcpu->stat.signal_exits;
trace_kvm_exit(vcpu, SIGNAL_EXITS);
}
}
return ret;
}
int __init kvm_mips_init(void)
{
int ret;
ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
if (ret)
return ret;
/* On MIPS, kernel modules are executed from "mapped space", which requires TLBs.
* The TLB handling code is statically linked with the rest of the kernel (kvm_tlb.c)
* to avoid the possibility of double faulting. The issue is that the TLB code
* references routines that are part of the the KVM module,
* which are only available once the module is loaded.
*/
kvm_mips_gfn_to_pfn = gfn_to_pfn;
kvm_mips_release_pfn_clean = kvm_release_pfn_clean;
kvm_mips_is_error_pfn = is_error_pfn;
pr_info("KVM/MIPS Initialized\n");
return 0;
}
void __exit kvm_mips_exit(void)
{
kvm_exit();
kvm_mips_gfn_to_pfn = NULL;
kvm_mips_release_pfn_clean = NULL;
kvm_mips_is_error_pfn = NULL;
pr_info("KVM/MIPS unloaded\n");
}
module_init(kvm_mips_init);
module_exit(kvm_mips_exit);
EXPORT_TRACEPOINT_SYMBOL(kvm_exit);
arch/mips/kvm/kvm_mips_comm.h 0 → 100644
View file @ 5e0e61dd
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* KVM/MIPS: commpage: mapped into get kernel space
*
* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
* Authors: Sanjay Lal <sanjayl@kymasys.com>
*/
#ifndef __KVM_MIPS_COMMPAGE_H__
#define __KVM_MIPS_COMMPAGE_H__
struct kvm_mips_commpage {
struct mips_coproc cop0; /* COP0 state is mapped into Guest kernel via commpage */
};
#define KVM_MIPS_COMM_EIDI_OFFSET 0x0
extern void kvm_mips_commpage_init(struct kvm_vcpu *vcpu);
#endif /* __KVM_MIPS_COMMPAGE_H__ */
arch/mips/kvm/kvm_mips_commpage.c 0 → 100644
View file @ 5e0e61dd
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* commpage, currently used for Virtual COP0 registers.
* Mapped into the guest kernel @ 0x0.
*
* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
* Authors: Sanjay Lal <sanjayl@kymasys.com>
*/
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/vmalloc.h>
#include <linux/fs.h>
#include <linux/bootmem.h>
#include <asm/page.h>
#include <asm/cacheflush.h>
#include <asm/mmu_context.h>
#include <linux/kvm_host.h>
#include "kvm_mips_comm.h"
void kvm_mips_commpage_init(struct kvm_vcpu *vcpu)
{
struct kvm_mips_commpage *page = vcpu->arch.kseg0_commpage;
memset(page, 0, sizeof(struct kvm_mips_commpage));
/* Specific init values for fields */
vcpu->arch.cop0 = &page->cop0;
memset(vcpu->arch.cop0, 0, sizeof(struct mips_coproc));
return;
}
arch/mips/kvm/kvm_mips_dyntrans.c 0 → 100644
View file @ 5e0e61dd
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* KVM/MIPS: Binary Patching for privileged instructions, reduces traps.
*
* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
* Authors: Sanjay Lal <sanjayl@kymasys.com>
*/
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/kvm_host.h>
#include <linux/module.h>
#include <linux/vmalloc.h>
#include <linux/fs.h>
#include <linux/bootmem.h>
#include "kvm_mips_comm.h"
#define SYNCI_TEMPLATE 0x041f0000
#define SYNCI_BASE(x) (((x) >> 21) & 0x1f)
#define SYNCI_OFFSET ((x) & 0xffff)
#define LW_TEMPLATE 0x8c000000
#define CLEAR_TEMPLATE 0x00000020
#define SW_TEMPLATE 0xac000000
int
kvm_mips_trans_cache_index(uint32_t inst, uint32_t *opc,
struct kvm_vcpu *vcpu)
{
int result = 0;
unsigned long kseg0_opc;
uint32_t synci_inst = 0x0;
/* Replace the CACHE instruction, with a NOP */
kseg0_opc =
CKSEG0ADDR(kvm_mips_translate_guest_kseg0_to_hpa
(vcpu, (unsigned long) opc));
memcpy((void *)kseg0_opc, (void *)&synci_inst, sizeof(uint32_t));
mips32_SyncICache(kseg0_opc, 32);
return result;
}
/*
* Address based CACHE instructions are transformed into synci(s). A little heavy
* for just D-cache invalidates, but avoids an expensive trap
*/
int
kvm_mips_trans_cache_va(uint32_t inst, uint32_t *opc,
struct kvm_vcpu *vcpu)
{
int result = 0;
unsigned long kseg0_opc;
uint32_t synci_inst = SYNCI_TEMPLATE, base, offset;
base = (inst >> 21) & 0x1f;
offset = inst & 0xffff;
synci_inst |= (base << 21);
synci_inst |= offset;
kseg0_opc =
CKSEG0ADDR(kvm_mips_translate_guest_kseg0_to_hpa
(vcpu, (unsigned long) opc));
memcpy((void *)kseg0_opc, (void *)&synci_inst, sizeof(uint32_t));
mips32_SyncICache(kseg0_opc, 32);
return result;
}
int
kvm_mips_trans_mfc0(uint32_t inst, uint32_t *opc, struct kvm_vcpu *vcpu)
{
int32_t rt, rd, sel;
uint32_t mfc0_inst;
unsigned long kseg0_opc, flags;
rt = (inst >> 16) & 0x1f;
rd = (inst >> 11) & 0x1f;
sel = inst & 0x7;
if ((rd == MIPS_CP0_ERRCTL) && (sel == 0)) {
mfc0_inst = CLEAR_TEMPLATE;
mfc0_inst |= ((rt & 0x1f) << 16);
} else {
mfc0_inst = LW_TEMPLATE;
mfc0_inst |= ((rt & 0x1f) << 16);
mfc0_inst |=
offsetof(struct mips_coproc,
reg[rd][sel]) + offsetof(struct kvm_mips_commpage,
cop0);
}
if (KVM_GUEST_KSEGX(opc) == KVM_GUEST_KSEG0) {
kseg0_opc =
CKSEG0ADDR(kvm_mips_translate_guest_kseg0_to_hpa
(vcpu, (unsigned long) opc));
memcpy((void *)kseg0_opc, (void *)&mfc0_inst, sizeof(uint32_t));
mips32_SyncICache(kseg0_opc, 32);
} else if (KVM_GUEST_KSEGX((unsigned long) opc) == KVM_GUEST_KSEG23) {
local_irq_save(flags);
memcpy((void *)opc, (void *)&mfc0_inst, sizeof(uint32_t));
mips32_SyncICache((unsigned long) opc, 32);
local_irq_restore(flags);
} else {
kvm_err("%s: Invalid address: %p\n", __func__, opc);
return -EFAULT;
}
return 0;
}
int
kvm_mips_trans_mtc0(uint32_t inst, uint32_t *opc, struct kvm_vcpu *vcpu)
{
int32_t rt, rd, sel;
uint32_t mtc0_inst = SW_TEMPLATE;
unsigned long kseg0_opc, flags;
rt = (inst >> 16) & 0x1f;
rd = (inst >> 11) & 0x1f;
sel = inst & 0x7;
mtc0_inst |= ((rt & 0x1f) << 16);
mtc0_inst |=
offsetof(struct mips_coproc,
reg[rd][sel]) + offsetof(struct kvm_mips_commpage, cop0);
if (KVM_GUEST_KSEGX(opc) == KVM_GUEST_KSEG0) {
kseg0_opc =
CKSEG0ADDR(kvm_mips_translate_guest_kseg0_to_hpa
(vcpu, (unsigned long) opc));
memcpy((void *)kseg0_opc, (void *)&mtc0_inst, sizeof(uint32_t));
mips32_SyncICache(kseg0_opc, 32);
} else if (KVM_GUEST_KSEGX((unsigned long) opc) == KVM_GUEST_KSEG23) {
local_irq_save(flags);
memcpy((void *)opc, (void *)&mtc0_inst, sizeof(uint32_t));
mips32_SyncICache((unsigned long) opc, 32);
local_irq_restore(flags);
} else {
kvm_err("%s: Invalid address: %p\n", __func__, opc);
return -EFAULT;
}
return 0;
}
arch/mips/kvm/kvm_mips_emul.c 0 → 100644
View file @ 5e0e61dd
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* KVM/MIPS: Instruction/Exception emulation
*
* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
* Authors: Sanjay Lal <sanjayl@kymasys.com>
*/
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/kvm_host.h>
#include <linux/module.h>
#include <linux/vmalloc.h>
#include <linux/fs.h>
#include <linux/bootmem.h>
#include <linux/random.h>
#include <asm/page.h>
#include <asm/cacheflush.h>
#include <asm/cpu-info.h>
#include <asm/mmu_context.h>
#include <asm/tlbflush.h>
#include <asm/inst.h>
#undef CONFIG_MIPS_MT
#include <asm/r4kcache.h>
#define CONFIG_MIPS_MT
#include "kvm_mips_opcode.h"
#include "kvm_mips_int.h"
#include "kvm_mips_comm.h"
#include "trace.h"
/*
* Compute the return address and do emulate branch simulation, if required.
* This function should be called only in branch delay slot active.
*/
unsigned long kvm_compute_return_epc(struct kvm_vcpu *vcpu,
unsigned long instpc)
{
unsigned int dspcontrol;
union mips_instruction insn;
struct kvm_vcpu_arch *arch = &vcpu->arch;
long epc = instpc;
long nextpc = KVM_INVALID_INST;
if (epc & 3)
goto unaligned;
/*
* Read the instruction
*/
insn.word = kvm_get_inst((uint32_t *) epc, vcpu);
if (insn.word == KVM_INVALID_INST)
return KVM_INVALID_INST;
switch (insn.i_format.opcode) {
/*
* jr and jalr are in r_format format.
*/
case spec_op:
switch (insn.r_format.func) {
case jalr_op:
arch->gprs[insn.r_format.rd] = epc + 8;
/* Fall through */
case jr_op:
nextpc = arch->gprs[insn.r_format.rs];
break;
}
break;
/*
* This group contains:
* bltz_op, bgez_op, bltzl_op, bgezl_op,
* bltzal_op, bgezal_op, bltzall_op, bgezall_op.
*/
case bcond_op:
switch (insn.i_format.rt) {
case bltz_op:
case bltzl_op:
if ((long)arch->gprs[insn.i_format.rs] < 0)
epc = epc + 4 + (insn.i_format.simmediate << 2);
else
epc += 8;
nextpc = epc;
break;
case bgez_op:
case bgezl_op:
if ((long)arch->gprs[insn.i_format.rs] >= 0)
epc = epc + 4 + (insn.i_format.simmediate << 2);
else
epc += 8;
nextpc = epc;
break;
case bltzal_op:
case bltzall_op:
arch->gprs[31] = epc + 8;
if ((long)arch->gprs[insn.i_format.rs] < 0)
epc = epc + 4 + (insn.i_format.simmediate << 2);
else
epc += 8;
nextpc = epc;
break;
case bgezal_op:
case bgezall_op:
arch->gprs[31] = epc + 8;
if ((long)arch->gprs[insn.i_format.rs] >= 0)
epc = epc + 4 + (insn.i_format.simmediate << 2);
else
epc += 8;
nextpc = epc;
break;
case bposge32_op:
if (!cpu_has_dsp)
goto sigill;
dspcontrol = rddsp(0x01);
if (dspcontrol >= 32) {
epc = epc + 4 + (insn.i_format.simmediate << 2);
} else
epc += 8;
nextpc = epc;
break;
}
break;
/*
* These are unconditional and in j_format.
*/
case jal_op:
arch->gprs[31] = instpc + 8;
case j_op:
epc += 4;
epc >>= 28;
epc <<= 28;
epc |= (insn.j_format.target << 2);
nextpc = epc;
break;
/*
* These are conditional and in i_format.
*/
case beq_op:
case beql_op:
if (arch->gprs[insn.i_format.rs] ==
arch->gprs[insn.i_format.rt])
epc = epc + 4 + (insn.i_format.simmediate << 2);
else
epc += 8;
nextpc = epc;
break;
case bne_op:
case bnel_op:
if (arch->gprs[insn.i_format.rs] !=
arch->gprs[insn.i_format.rt])
epc = epc + 4 + (insn.i_format.simmediate << 2);
else
epc += 8;
nextpc = epc;
break;
case blez_op: /* not really i_format */
case blezl_op:
/* rt field assumed to be zero */
if ((long)arch->gprs[insn.i_format.rs] <= 0)
epc = epc + 4 + (insn.i_format.simmediate << 2);
else
epc += 8;
nextpc = epc;
break;
case bgtz_op:
case bgtzl_op:
/* rt field assumed to be zero */
if ((long)arch->gprs[insn.i_format.rs] > 0)
epc = epc + 4 + (insn.i_format.simmediate << 2);
else
epc += 8;
nextpc = epc;
break;
/*
* And now the FPA/cp1 branch instructions.
*/
case cop1_op:
printk("%s: unsupported cop1_op\n", __func__);
break;
}
return nextpc;
unaligned:
printk("%s: unaligned epc\n", __func__);
return nextpc;
sigill:
printk("%s: DSP branch but not DSP ASE\n", __func__);
return nextpc;
}
enum emulation_result update_pc(struct kvm_vcpu *vcpu, uint32_t cause)
{
unsigned long branch_pc;
enum emulation_result er = EMULATE_DONE;
if (cause & CAUSEF_BD) {
branch_pc = kvm_compute_return_epc(vcpu, vcpu->arch.pc);
if (branch_pc == KVM_INVALID_INST) {
er = EMULATE_FAIL;
} else {
vcpu->arch.pc = branch_pc;
kvm_debug("BD update_pc(): New PC: %#lx\n", vcpu->arch.pc);
}
} else
vcpu->arch.pc += 4;
kvm_debug("update_pc(): New PC: %#lx\n", vcpu->arch.pc);
return er;
}
/* Everytime the compare register is written to, we need to decide when to fire
* the timer that represents timer ticks to the GUEST.
*
*/
enum emulation_result kvm_mips_emulate_count(struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
enum emulation_result er = EMULATE_DONE;
/* If COUNT is enabled */
if (!(kvm_read_c0_guest_cause(cop0) & CAUSEF_DC)) {
hrtimer_try_to_cancel(&vcpu->arch.comparecount_timer);
hrtimer_start(&vcpu->arch.comparecount_timer,
ktime_set(0, MS_TO_NS(10)), HRTIMER_MODE_REL);
} else {
hrtimer_try_to_cancel(&vcpu->arch.comparecount_timer);
}
return er;
}
enum emulation_result kvm_mips_emul_eret(struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
enum emulation_result er = EMULATE_DONE;
if (kvm_read_c0_guest_status(cop0) & ST0_EXL) {
kvm_debug("[%#lx] ERET to %#lx\n", vcpu->arch.pc,
kvm_read_c0_guest_epc(cop0));
kvm_clear_c0_guest_status(cop0, ST0_EXL);
vcpu->arch.pc = kvm_read_c0_guest_epc(cop0);
} else if (kvm_read_c0_guest_status(cop0) & ST0_ERL) {
kvm_clear_c0_guest_status(cop0, ST0_ERL);
vcpu->arch.pc = kvm_read_c0_guest_errorepc(cop0);
} else {
printk("[%#lx] ERET when MIPS_SR_EXL|MIPS_SR_ERL == 0\n",
vcpu->arch.pc);
er = EMULATE_FAIL;
}
return er;
}
enum emulation_result kvm_mips_emul_wait(struct kvm_vcpu *vcpu)
{
enum emulation_result er = EMULATE_DONE;
kvm_debug("[%#lx] !!!WAIT!!! (%#lx)\n", vcpu->arch.pc,
vcpu->arch.pending_exceptions);
++vcpu->stat.wait_exits;
trace_kvm_exit(vcpu, WAIT_EXITS);
if (!vcpu->arch.pending_exceptions) {
vcpu->arch.wait = 1;
kvm_vcpu_block(vcpu);
/* We we are runnable, then definitely go off to user space to check if any
* I/O interrupts are pending.
*/
if (kvm_check_request(KVM_REQ_UNHALT, vcpu)) {
clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
vcpu->run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
}
}
return er;
}
/* XXXKYMA: Linux doesn't seem to use TLBR, return EMULATE_FAIL for now so that we can catch
* this, if things ever change
*/
enum emulation_result kvm_mips_emul_tlbr(struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
enum emulation_result er = EMULATE_FAIL;
uint32_t pc = vcpu->arch.pc;
printk("[%#x] COP0_TLBR [%ld]\n", pc, kvm_read_c0_guest_index(cop0));
return er;
}
/* Write Guest TLB Entry @ Index */
enum emulation_result kvm_mips_emul_tlbwi(struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
int index = kvm_read_c0_guest_index(cop0);
enum emulation_result er = EMULATE_DONE;
struct kvm_mips_tlb *tlb = NULL;
uint32_t pc = vcpu->arch.pc;
if (index < 0 || index >= KVM_MIPS_GUEST_TLB_SIZE) {
printk("%s: illegal index: %d\n", __func__, index);
printk
("[%#x] COP0_TLBWI [%d] (entryhi: %#lx, entrylo0: %#lx entrylo1: %#lx, mask: %#lx)\n",
pc, index, kvm_read_c0_guest_entryhi(cop0),
kvm_read_c0_guest_entrylo0(cop0),
kvm_read_c0_guest_entrylo1(cop0),
kvm_read_c0_guest_pagemask(cop0));
index = (index & ~0x80000000) % KVM_MIPS_GUEST_TLB_SIZE;
}
tlb = &vcpu->arch.guest_tlb[index];
#if 1
/* Probe the shadow host TLB for the entry being overwritten, if one matches, invalidate it */
kvm_mips_host_tlb_inv(vcpu, tlb->tlb_hi);
#endif
tlb->tlb_mask = kvm_read_c0_guest_pagemask(cop0);
tlb->tlb_hi = kvm_read_c0_guest_entryhi(cop0);
tlb->tlb_lo0 = kvm_read_c0_guest_entrylo0(cop0);
tlb->tlb_lo1 = kvm_read_c0_guest_entrylo1(cop0);
kvm_debug
("[%#x] COP0_TLBWI [%d] (entryhi: %#lx, entrylo0: %#lx entrylo1: %#lx, mask: %#lx)\n",
pc, index, kvm_read_c0_guest_entryhi(cop0),
kvm_read_c0_guest_entrylo0(cop0), kvm_read_c0_guest_entrylo1(cop0),
kvm_read_c0_guest_pagemask(cop0));
return er;
}
/* Write Guest TLB Entry @ Random Index */
enum emulation_result kvm_mips_emul_tlbwr(struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
enum emulation_result er = EMULATE_DONE;
struct kvm_mips_tlb *tlb = NULL;
uint32_t pc = vcpu->arch.pc;
int index;
#if 1
get_random_bytes(&index, sizeof(index));
index &= (KVM_MIPS_GUEST_TLB_SIZE - 1);
#else
index = jiffies % KVM_MIPS_GUEST_TLB_SIZE;
#endif
if (index < 0 || index >= KVM_MIPS_GUEST_TLB_SIZE) {
printk("%s: illegal index: %d\n", __func__, index);
return EMULATE_FAIL;
}
tlb = &vcpu->arch.guest_tlb[index];
#if 1
/* Probe the shadow host TLB for the entry being overwritten, if one matches, invalidate it */
kvm_mips_host_tlb_inv(vcpu, tlb->tlb_hi);
#endif
tlb->tlb_mask = kvm_read_c0_guest_pagemask(cop0);
tlb->tlb_hi = kvm_read_c0_guest_entryhi(cop0);
tlb->tlb_lo0 = kvm_read_c0_guest_entrylo0(cop0);
tlb->tlb_lo1 = kvm_read_c0_guest_entrylo1(cop0);
kvm_debug
("[%#x] COP0_TLBWR[%d] (entryhi: %#lx, entrylo0: %#lx entrylo1: %#lx)\n",
pc, index, kvm_read_c0_guest_entryhi(cop0),
kvm_read_c0_guest_entrylo0(cop0),
kvm_read_c0_guest_entrylo1(cop0));
return er;
}
enum emulation_result kvm_mips_emul_tlbp(struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
long entryhi = kvm_read_c0_guest_entryhi(cop0);
enum emulation_result er = EMULATE_DONE;
uint32_t pc = vcpu->arch.pc;
int index = -1;
index = kvm_mips_guest_tlb_lookup(vcpu, entryhi);
kvm_write_c0_guest_index(cop0, index);
kvm_debug("[%#x] COP0_TLBP (entryhi: %#lx), index: %d\n", pc, entryhi,
index);
return er;
}
enum emulation_result
kvm_mips_emulate_CP0(uint32_t inst, uint32_t *opc, uint32_t cause,
struct kvm_run *run, struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
enum emulation_result er = EMULATE_DONE;
int32_t rt, rd, copz, sel, co_bit, op;
uint32_t pc = vcpu->arch.pc;
unsigned long curr_pc;
/*
* Update PC and hold onto current PC in case there is
* an error and we want to rollback the PC
*/
curr_pc = vcpu->arch.pc;
er = update_pc(vcpu, cause);
if (er == EMULATE_FAIL) {
return er;
}
copz = (inst >> 21) & 0x1f;
rt = (inst >> 16) & 0x1f;
rd = (inst >> 11) & 0x1f;
sel = inst & 0x7;
co_bit = (inst >> 25) & 1;
/* Verify that the register is valid */
if (rd > MIPS_CP0_DESAVE) {
printk("Invalid rd: %d\n", rd);
er = EMULATE_FAIL;
goto done;
}
if (co_bit) {
op = (inst) & 0xff;
switch (op) {
case tlbr_op: /* Read indexed TLB entry */
er = kvm_mips_emul_tlbr(vcpu);
break;
case tlbwi_op: /* Write indexed */
er = kvm_mips_emul_tlbwi(vcpu);
break;
case tlbwr_op: /* Write random */
er = kvm_mips_emul_tlbwr(vcpu);
break;
case tlbp_op: /* TLB Probe */
er = kvm_mips_emul_tlbp(vcpu);
break;
case rfe_op:
printk("!!!COP0_RFE!!!\n");
break;
case eret_op:
er = kvm_mips_emul_eret(vcpu);
goto dont_update_pc;
break;
case wait_op:
er = kvm_mips_emul_wait(vcpu);
break;
}
} else {
switch (copz) {
case mfc_op:
#ifdef CONFIG_KVM_MIPS_DEBUG_COP0_COUNTERS
cop0->stat[rd][sel]++;
#endif
/* Get reg */
if ((rd == MIPS_CP0_COUNT) && (sel == 0)) {
/* XXXKYMA: Run the Guest count register @ 1/4 the rate of the host */
vcpu->arch.gprs[rt] = (read_c0_count() >> 2);
} else if ((rd == MIPS_CP0_ERRCTL) && (sel == 0)) {
vcpu->arch.gprs[rt] = 0x0;
#ifdef CONFIG_KVM_MIPS_DYN_TRANS
kvm_mips_trans_mfc0(inst, opc, vcpu);
#endif
}
else {
vcpu->arch.gprs[rt] = cop0->reg[rd][sel];
#ifdef CONFIG_KVM_MIPS_DYN_TRANS
kvm_mips_trans_mfc0(inst, opc, vcpu);
#endif
}
kvm_debug
("[%#x] MFCz[%d][%d], vcpu->arch.gprs[%d]: %#lx\n",
pc, rd, sel, rt, vcpu->arch.gprs[rt]);
break;
case dmfc_op:
vcpu->arch.gprs[rt] = cop0->reg[rd][sel];
break;
case mtc_op:
#ifdef CONFIG_KVM_MIPS_DEBUG_COP0_COUNTERS
cop0->stat[rd][sel]++;
#endif
if ((rd == MIPS_CP0_TLB_INDEX)
&& (vcpu->arch.gprs[rt] >=
KVM_MIPS_GUEST_TLB_SIZE)) {
printk("Invalid TLB Index: %ld",
vcpu->arch.gprs[rt]);
er = EMULATE_FAIL;
break;
}
#define C0_EBASE_CORE_MASK 0xff
if ((rd == MIPS_CP0_PRID) && (sel == 1)) {
/* Preserve CORE number */
kvm_change_c0_guest_ebase(cop0,
~(C0_EBASE_CORE_MASK),
vcpu->arch.gprs[rt]);
printk("MTCz, cop0->reg[EBASE]: %#lx\n",
kvm_read_c0_guest_ebase(cop0));
} else if (rd == MIPS_CP0_TLB_HI && sel == 0) {
uint32_t nasid =
vcpu->arch.gprs[rt] & ASID_MASK;
if ((KSEGX(vcpu->arch.gprs[rt]) != CKSEG0)
&&
((kvm_read_c0_guest_entryhi(cop0) &
ASID_MASK) != nasid)) {
kvm_debug
("MTCz, change ASID from %#lx to %#lx\n",
kvm_read_c0_guest_entryhi(cop0) &
ASID_MASK,
vcpu->arch.gprs[rt] & ASID_MASK);
/* Blow away the shadow host TLBs */
kvm_mips_flush_host_tlb(1);
}
kvm_write_c0_guest_entryhi(cop0,
vcpu->arch.gprs[rt]);
}
/* Are we writing to COUNT */
else if ((rd == MIPS_CP0_COUNT) && (sel == 0)) {
/* Linux doesn't seem to write into COUNT, we throw an error
* if we notice a write to COUNT
*/
/*er = EMULATE_FAIL; */
goto done;
} else if ((rd == MIPS_CP0_COMPARE) && (sel == 0)) {
kvm_debug("[%#x] MTCz, COMPARE %#lx <- %#lx\n",
pc, kvm_read_c0_guest_compare(cop0),
vcpu->arch.gprs[rt]);
/* If we are writing to COMPARE */
/* Clear pending timer interrupt, if any */
kvm_mips_callbacks->dequeue_timer_int(vcpu);
kvm_write_c0_guest_compare(cop0,
vcpu->arch.gprs[rt]);
} else if ((rd == MIPS_CP0_STATUS) && (sel == 0)) {
kvm_write_c0_guest_status(cop0,
vcpu->arch.gprs[rt]);
/* Make sure that CU1 and NMI bits are never set */
kvm_clear_c0_guest_status(cop0,
(ST0_CU1 | ST0_NMI));
#ifdef CONFIG_KVM_MIPS_DYN_TRANS
kvm_mips_trans_mtc0(inst, opc, vcpu);
#endif
} else {
cop0->reg[rd][sel] = vcpu->arch.gprs[rt];
#ifdef CONFIG_KVM_MIPS_DYN_TRANS
kvm_mips_trans_mtc0(inst, opc, vcpu);
#endif
}
kvm_debug("[%#x] MTCz, cop0->reg[%d][%d]: %#lx\n", pc,
rd, sel, cop0->reg[rd][sel]);
break;
case dmtc_op:
printk
("!!!!!!![%#lx]dmtc_op: rt: %d, rd: %d, sel: %d!!!!!!\n",
vcpu->arch.pc, rt, rd, sel);
er = EMULATE_FAIL;
break;
case mfmcz_op:
#ifdef KVM_MIPS_DEBUG_COP0_COUNTERS
cop0->stat[MIPS_CP0_STATUS][0]++;
#endif
if (rt != 0) {
vcpu->arch.gprs[rt] =
kvm_read_c0_guest_status(cop0);
}
/* EI */
if (inst & 0x20) {
kvm_debug("[%#lx] mfmcz_op: EI\n",
vcpu->arch.pc);
kvm_set_c0_guest_status(cop0, ST0_IE);
} else {
kvm_debug("[%#lx] mfmcz_op: DI\n",
vcpu->arch.pc);
kvm_clear_c0_guest_status(cop0, ST0_IE);
}
break;
case wrpgpr_op:
{
uint32_t css =
cop0->reg[MIPS_CP0_STATUS][2] & 0xf;
uint32_t pss =
(cop0->reg[MIPS_CP0_STATUS][2] >> 6) & 0xf;
/* We don't support any shadow register sets, so SRSCtl[PSS] == SRSCtl[CSS] = 0 */
if (css || pss) {
er = EMULATE_FAIL;
break;
}
kvm_debug("WRPGPR[%d][%d] = %#lx\n", pss, rd,
vcpu->arch.gprs[rt]);
vcpu->arch.gprs[rd] = vcpu->arch.gprs[rt];
}
break;
default:
printk
("[%#lx]MachEmulateCP0: unsupported COP0, copz: 0x%x\n",
vcpu->arch.pc, copz);
er = EMULATE_FAIL;
break;
}
}
done:
/*
* Rollback PC only if emulation was unsuccessful
*/
if (er == EMULATE_FAIL) {
vcpu->arch.pc = curr_pc;
}
dont_update_pc:
/*
* This is for special instructions whose emulation
* updates the PC, so do not overwrite the PC under
* any circumstances
*/
return er;
}
enum emulation_result
kvm_mips_emulate_store(uint32_t inst, uint32_t cause,
struct kvm_run *run, struct kvm_vcpu *vcpu)
{
enum emulation_result er = EMULATE_DO_MMIO;
int32_t op, base, rt, offset;
uint32_t bytes;
void *data = run->mmio.data;
unsigned long curr_pc;
/*
* Update PC and hold onto current PC in case there is
* an error and we want to rollback the PC
*/
curr_pc = vcpu->arch.pc;
er = update_pc(vcpu, cause);
if (er == EMULATE_FAIL)
return er;
rt = (inst >> 16) & 0x1f;
base = (inst >> 21) & 0x1f;
offset = inst & 0xffff;
op = (inst >> 26) & 0x3f;
switch (op) {
case sb_op:
bytes = 1;
if (bytes > sizeof(run->mmio.data)) {
kvm_err("%s: bad MMIO length: %d\n", __func__,
run->mmio.len);
}
run->mmio.phys_addr =
kvm_mips_callbacks->gva_to_gpa(vcpu->arch.
host_cp0_badvaddr);
if (run->mmio.phys_addr == KVM_INVALID_ADDR) {
er = EMULATE_FAIL;
break;
}
run->mmio.len = bytes;
run->mmio.is_write = 1;
vcpu->mmio_needed = 1;
vcpu->mmio_is_write = 1;
*(u8 *) data = vcpu->arch.gprs[rt];
kvm_debug("OP_SB: eaddr: %#lx, gpr: %#lx, data: %#x\n",
vcpu->arch.host_cp0_badvaddr, vcpu->arch.gprs[rt],
*(uint8_t *) data);
break;
case sw_op:
bytes = 4;
if (bytes > sizeof(run->mmio.data)) {
kvm_err("%s: bad MMIO length: %d\n", __func__,
run->mmio.len);
}
run->mmio.phys_addr =
kvm_mips_callbacks->gva_to_gpa(vcpu->arch.
host_cp0_badvaddr);
if (run->mmio.phys_addr == KVM_INVALID_ADDR) {
er = EMULATE_FAIL;
break;
}
run->mmio.len = bytes;
run->mmio.is_write = 1;
vcpu->mmio_needed = 1;
vcpu->mmio_is_write = 1;
*(uint32_t *) data = vcpu->arch.gprs[rt];
kvm_debug("[%#lx] OP_SW: eaddr: %#lx, gpr: %#lx, data: %#x\n",
vcpu->arch.pc, vcpu->arch.host_cp0_badvaddr,
vcpu->arch.gprs[rt], *(uint32_t *) data);
break;
case sh_op:
bytes = 2;
if (bytes > sizeof(run->mmio.data)) {
kvm_err("%s: bad MMIO length: %d\n", __func__,
run->mmio.len);
}
run->mmio.phys_addr =
kvm_mips_callbacks->gva_to_gpa(vcpu->arch.
host_cp0_badvaddr);
if (run->mmio.phys_addr == KVM_INVALID_ADDR) {
er = EMULATE_FAIL;
break;
}
run->mmio.len = bytes;
run->mmio.is_write = 1;
vcpu->mmio_needed = 1;
vcpu->mmio_is_write = 1;
*(uint16_t *) data = vcpu->arch.gprs[rt];
kvm_debug("[%#lx] OP_SH: eaddr: %#lx, gpr: %#lx, data: %#x\n",
vcpu->arch.pc, vcpu->arch.host_cp0_badvaddr,
vcpu->arch.gprs[rt], *(uint32_t *) data);
break;
default:
printk("Store not yet supported");
er = EMULATE_FAIL;
break;
}
/*
* Rollback PC if emulation was unsuccessful
*/
if (er == EMULATE_FAIL) {
vcpu->arch.pc = curr_pc;
}
return er;
}
enum emulation_result
kvm_mips_emulate_load(uint32_t inst, uint32_t cause,
struct kvm_run *run, struct kvm_vcpu *vcpu)
{
enum emulation_result er = EMULATE_DO_MMIO;
int32_t op, base, rt, offset;
uint32_t bytes;
rt = (inst >> 16) & 0x1f;
base = (inst >> 21) & 0x1f;
offset = inst & 0xffff;
op = (inst >> 26) & 0x3f;
vcpu->arch.pending_load_cause = cause;
vcpu->arch.io_gpr = rt;
switch (op) {
case lw_op:
bytes = 4;
if (bytes > sizeof(run->mmio.data)) {
kvm_err("%s: bad MMIO length: %d\n", __func__,
run->mmio.len);
er = EMULATE_FAIL;
break;
}
run->mmio.phys_addr =
kvm_mips_callbacks->gva_to_gpa(vcpu->arch.
host_cp0_badvaddr);
if (run->mmio.phys_addr == KVM_INVALID_ADDR) {
er = EMULATE_FAIL;
break;
}
run->mmio.len = bytes;
run->mmio.is_write = 0;
vcpu->mmio_needed = 1;
vcpu->mmio_is_write = 0;
break;
case lh_op:
case lhu_op:
bytes = 2;
if (bytes > sizeof(run->mmio.data)) {
kvm_err("%s: bad MMIO length: %d\n", __func__,
run->mmio.len);
er = EMULATE_FAIL;
break;
}
run->mmio.phys_addr =
kvm_mips_callbacks->gva_to_gpa(vcpu->arch.
host_cp0_badvaddr);
if (run->mmio.phys_addr == KVM_INVALID_ADDR) {
er = EMULATE_FAIL;
break;
}
run->mmio.len = bytes;
run->mmio.is_write = 0;
vcpu->mmio_needed = 1;
vcpu->mmio_is_write = 0;
if (op == lh_op)
vcpu->mmio_needed = 2;
else
vcpu->mmio_needed = 1;
break;
case lbu_op:
case lb_op:
bytes = 1;
if (bytes > sizeof(run->mmio.data)) {
kvm_err("%s: bad MMIO length: %d\n", __func__,
run->mmio.len);
er = EMULATE_FAIL;
break;
}
run->mmio.phys_addr =
kvm_mips_callbacks->gva_to_gpa(vcpu->arch.
host_cp0_badvaddr);
if (run->mmio.phys_addr == KVM_INVALID_ADDR) {
er = EMULATE_FAIL;
break;
}
run->mmio.len = bytes;
run->mmio.is_write = 0;
vcpu->mmio_is_write = 0;
if (op == lb_op)
vcpu->mmio_needed = 2;
else
vcpu->mmio_needed = 1;
break;
default:
printk("Load not yet supported");
er = EMULATE_FAIL;
break;
}
return er;
}
int kvm_mips_sync_icache(unsigned long va, struct kvm_vcpu *vcpu)
{
unsigned long offset = (va & ~PAGE_MASK);
struct kvm *kvm = vcpu->kvm;
unsigned long pa;
gfn_t gfn;
pfn_t pfn;
gfn = va >> PAGE_SHIFT;
if (gfn >= kvm->arch.guest_pmap_npages) {
printk("%s: Invalid gfn: %#llx\n", __func__, gfn);
kvm_mips_dump_host_tlbs();
kvm_arch_vcpu_dump_regs(vcpu);
return -1;
}
pfn = kvm->arch.guest_pmap[gfn];
pa = (pfn << PAGE_SHIFT) | offset;
printk("%s: va: %#lx, unmapped: %#x\n", __func__, va, CKSEG0ADDR(pa));
mips32_SyncICache(CKSEG0ADDR(pa), 32);
return 0;
}
#define MIPS_CACHE_OP_INDEX_INV 0x0
#define MIPS_CACHE_OP_INDEX_LD_TAG 0x1
#define MIPS_CACHE_OP_INDEX_ST_TAG 0x2
#define MIPS_CACHE_OP_IMP 0x3
#define MIPS_CACHE_OP_HIT_INV 0x4
#define MIPS_CACHE_OP_FILL_WB_INV 0x5
#define MIPS_CACHE_OP_HIT_HB 0x6
#define MIPS_CACHE_OP_FETCH_LOCK 0x7
#define MIPS_CACHE_ICACHE 0x0
#define MIPS_CACHE_DCACHE 0x1
#define MIPS_CACHE_SEC 0x3
enum emulation_result
kvm_mips_emulate_cache(uint32_t inst, uint32_t *opc, uint32_t cause,
struct kvm_run *run, struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
extern void (*r4k_blast_dcache) (void);
extern void (*r4k_blast_icache) (void);
enum emulation_result er = EMULATE_DONE;
int32_t offset, cache, op_inst, op, base;
struct kvm_vcpu_arch *arch = &vcpu->arch;
unsigned long va;
unsigned long curr_pc;
/*
* Update PC and hold onto current PC in case there is
* an error and we want to rollback the PC
*/
curr_pc = vcpu->arch.pc;
er = update_pc(vcpu, cause);
if (er == EMULATE_FAIL)
return er;
base = (inst >> 21) & 0x1f;
op_inst = (inst >> 16) & 0x1f;
offset = inst & 0xffff;
cache = (inst >> 16) & 0x3;
op = (inst >> 18) & 0x7;
va = arch->gprs[base] + offset;
kvm_debug("CACHE (cache: %#x, op: %#x, base[%d]: %#lx, offset: %#x\n",
cache, op, base, arch->gprs[base], offset);
/* Treat INDEX_INV as a nop, basically issued by Linux on startup to invalidate
* the caches entirely by stepping through all the ways/indexes
*/
if (op == MIPS_CACHE_OP_INDEX_INV) {
kvm_debug
("@ %#lx/%#lx CACHE (cache: %#x, op: %#x, base[%d]: %#lx, offset: %#x\n",
vcpu->arch.pc, vcpu->arch.gprs[31], cache, op, base,
arch->gprs[base], offset);
if (cache == MIPS_CACHE_DCACHE)
r4k_blast_dcache();
else if (cache == MIPS_CACHE_ICACHE)
r4k_blast_icache();
else {
printk("%s: unsupported CACHE INDEX operation\n",
__func__);
return EMULATE_FAIL;
}
#ifdef CONFIG_KVM_MIPS_DYN_TRANS
kvm_mips_trans_cache_index(inst, opc, vcpu);
#endif
goto done;
}
preempt_disable();
if (KVM_GUEST_KSEGX(va) == KVM_GUEST_KSEG0) {
if (kvm_mips_host_tlb_lookup(vcpu, va) < 0) {
kvm_mips_handle_kseg0_tlb_fault(va, vcpu);
}
} else if ((KVM_GUEST_KSEGX(va) < KVM_GUEST_KSEG0) ||
KVM_GUEST_KSEGX(va) == KVM_GUEST_KSEG23) {
int index;
/* If an entry already exists then skip */
if (kvm_mips_host_tlb_lookup(vcpu, va) >= 0) {
goto skip_fault;
}
/* If address not in the guest TLB, then give the guest a fault, the
* resulting handler will do the right thing
*/
index = kvm_mips_guest_tlb_lookup(vcpu, (va & VPN2_MASK) |
(kvm_read_c0_guest_entryhi
(cop0) & ASID_MASK));
if (index < 0) {
vcpu->arch.host_cp0_entryhi = (va & VPN2_MASK);
vcpu->arch.host_cp0_badvaddr = va;
er = kvm_mips_emulate_tlbmiss_ld(cause, NULL, run,
vcpu);
preempt_enable();
goto dont_update_pc;
} else {
struct kvm_mips_tlb *tlb = &vcpu->arch.guest_tlb[index];
/* Check if the entry is valid, if not then setup a TLB invalid exception to the guest */
if (!TLB_IS_VALID(*tlb, va)) {
er = kvm_mips_emulate_tlbinv_ld(cause, NULL,
run, vcpu);
preempt_enable();
goto dont_update_pc;
} else {
/* We fault an entry from the guest tlb to the shadow host TLB */
kvm_mips_handle_mapped_seg_tlb_fault(vcpu, tlb,
NULL,
NULL);
}
}
} else {
printk
("INVALID CACHE INDEX/ADDRESS (cache: %#x, op: %#x, base[%d]: %#lx, offset: %#x\n",
cache, op, base, arch->gprs[base], offset);
er = EMULATE_FAIL;
preempt_enable();
goto dont_update_pc;
}
skip_fault:
/* XXXKYMA: Only a subset of cache ops are supported, used by Linux */
if (cache == MIPS_CACHE_DCACHE
&& (op == MIPS_CACHE_OP_FILL_WB_INV
|| op == MIPS_CACHE_OP_HIT_INV)) {
flush_dcache_line(va);
#ifdef CONFIG_KVM_MIPS_DYN_TRANS
/* Replace the CACHE instruction, with a SYNCI, not the same, but avoids a trap */
kvm_mips_trans_cache_va(inst, opc, vcpu);
#endif
} else if (op == MIPS_CACHE_OP_HIT_INV && cache == MIPS_CACHE_ICACHE) {
flush_dcache_line(va);
flush_icache_line(va);
#ifdef CONFIG_KVM_MIPS_DYN_TRANS
/* Replace the CACHE instruction, with a SYNCI */
kvm_mips_trans_cache_va(inst, opc, vcpu);
#endif
} else {
printk
("NO-OP CACHE (cache: %#x, op: %#x, base[%d]: %#lx, offset: %#x\n",
cache, op, base, arch->gprs[base], offset);
er = EMULATE_FAIL;
preempt_enable();
goto dont_update_pc;
}
preempt_enable();
dont_update_pc:
/*
* Rollback PC
*/
vcpu->arch.pc = curr_pc;
done:
return er;
}
enum emulation_result
kvm_mips_emulate_inst(unsigned long cause, uint32_t *opc,
struct kvm_run *run, struct kvm_vcpu *vcpu)
{
enum emulation_result er = EMULATE_DONE;
uint32_t inst;
/*
* Fetch the instruction.
*/
if (cause & CAUSEF_BD) {
opc += 1;
}
inst = kvm_get_inst(opc, vcpu);
switch (((union mips_instruction)inst).r_format.opcode) {
case cop0_op:
er = kvm_mips_emulate_CP0(inst, opc, cause, run, vcpu);
break;
case sb_op:
case sh_op:
case sw_op:
er = kvm_mips_emulate_store(inst, cause, run, vcpu);
break;
case lb_op:
case lbu_op:
case lhu_op:
case lh_op:
case lw_op:
er = kvm_mips_emulate_load(inst, cause, run, vcpu);
break;
case cache_op:
++vcpu->stat.cache_exits;
trace_kvm_exit(vcpu, CACHE_EXITS);
er = kvm_mips_emulate_cache(inst, opc, cause, run, vcpu);
break;
default:
printk("Instruction emulation not supported (%p/%#x)\n", opc,
inst);
kvm_arch_vcpu_dump_regs(vcpu);
er = EMULATE_FAIL;
break;
}
return er;
}
enum emulation_result
kvm_mips_emulate_syscall(unsigned long cause, uint32_t *opc,
struct kvm_run *run, struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
struct kvm_vcpu_arch *arch = &vcpu->arch;
enum emulation_result er = EMULATE_DONE;
if ((kvm_read_c0_guest_status(cop0) & ST0_EXL) == 0) {
/* save old pc */
kvm_write_c0_guest_epc(cop0, arch->pc);
kvm_set_c0_guest_status(cop0, ST0_EXL);
if (cause & CAUSEF_BD)
kvm_set_c0_guest_cause(cop0, CAUSEF_BD);
else
kvm_clear_c0_guest_cause(cop0, CAUSEF_BD);
kvm_debug("Delivering SYSCALL @ pc %#lx\n", arch->pc);
kvm_change_c0_guest_cause(cop0, (0xff),
(T_SYSCALL << CAUSEB_EXCCODE));
/* Set PC to the exception entry point */
arch->pc = KVM_GUEST_KSEG0 + 0x180;
} else {
printk("Trying to deliver SYSCALL when EXL is already set\n");
er = EMULATE_FAIL;
}
return er;
}
enum emulation_result
kvm_mips_emulate_tlbmiss_ld(unsigned long cause, uint32_t *opc,
struct kvm_run *run, struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
struct kvm_vcpu_arch *arch = &vcpu->arch;
enum emulation_result er = EMULATE_DONE;
unsigned long entryhi = (vcpu->arch. host_cp0_badvaddr & VPN2_MASK) |
(kvm_read_c0_guest_entryhi(cop0) & ASID_MASK);
if ((kvm_read_c0_guest_status(cop0) & ST0_EXL) == 0) {
/* save old pc */
kvm_write_c0_guest_epc(cop0, arch->pc);
kvm_set_c0_guest_status(cop0, ST0_EXL);
if (cause & CAUSEF_BD)
kvm_set_c0_guest_cause(cop0, CAUSEF_BD);
else
kvm_clear_c0_guest_cause(cop0, CAUSEF_BD);
kvm_debug("[EXL == 0] delivering TLB MISS @ pc %#lx\n",
arch->pc);
/* set pc to the exception entry point */
arch->pc = KVM_GUEST_KSEG0 + 0x0;
} else {
kvm_debug("[EXL == 1] delivering TLB MISS @ pc %#lx\n",
arch->pc);
arch->pc = KVM_GUEST_KSEG0 + 0x180;
}
kvm_change_c0_guest_cause(cop0, (0xff),
(T_TLB_LD_MISS << CAUSEB_EXCCODE));
/* setup badvaddr, context and entryhi registers for the guest */
kvm_write_c0_guest_badvaddr(cop0, vcpu->arch.host_cp0_badvaddr);
/* XXXKYMA: is the context register used by linux??? */
kvm_write_c0_guest_entryhi(cop0, entryhi);
/* Blow away the shadow host TLBs */
kvm_mips_flush_host_tlb(1);
return er;
}
enum emulation_result
kvm_mips_emulate_tlbinv_ld(unsigned long cause, uint32_t *opc,
struct kvm_run *run, struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
struct kvm_vcpu_arch *arch = &vcpu->arch;
enum emulation_result er = EMULATE_DONE;
unsigned long entryhi =
(vcpu->arch.host_cp0_badvaddr & VPN2_MASK) |
(kvm_read_c0_guest_entryhi(cop0) & ASID_MASK);
if ((kvm_read_c0_guest_status(cop0) & ST0_EXL) == 0) {
/* save old pc */
kvm_write_c0_guest_epc(cop0, arch->pc);
kvm_set_c0_guest_status(cop0, ST0_EXL);
if (cause & CAUSEF_BD)
kvm_set_c0_guest_cause(cop0, CAUSEF_BD);
else
kvm_clear_c0_guest_cause(cop0, CAUSEF_BD);
kvm_debug("[EXL == 0] delivering TLB INV @ pc %#lx\n",
arch->pc);
/* set pc to the exception entry point */
arch->pc = KVM_GUEST_KSEG0 + 0x180;
} else {
kvm_debug("[EXL == 1] delivering TLB MISS @ pc %#lx\n",
arch->pc);
arch->pc = KVM_GUEST_KSEG0 + 0x180;
}
kvm_change_c0_guest_cause(cop0, (0xff),
(T_TLB_LD_MISS << CAUSEB_EXCCODE));
/* setup badvaddr, context and entryhi registers for the guest */
kvm_write_c0_guest_badvaddr(cop0, vcpu->arch.host_cp0_badvaddr);
/* XXXKYMA: is the context register used by linux??? */
kvm_write_c0_guest_entryhi(cop0, entryhi);
/* Blow away the shadow host TLBs */
kvm_mips_flush_host_tlb(1);
return er;
}
enum emulation_result
kvm_mips_emulate_tlbmiss_st(unsigned long cause, uint32_t *opc,
struct kvm_run *run, struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
struct kvm_vcpu_arch *arch = &vcpu->arch;
enum emulation_result er = EMULATE_DONE;
unsigned long entryhi = (vcpu->arch.host_cp0_badvaddr & VPN2_MASK) |
(kvm_read_c0_guest_entryhi(cop0) & ASID_MASK);
if ((kvm_read_c0_guest_status(cop0) & ST0_EXL) == 0) {
/* save old pc */
kvm_write_c0_guest_epc(cop0, arch->pc);
kvm_set_c0_guest_status(cop0, ST0_EXL);
if (cause & CAUSEF_BD)
kvm_set_c0_guest_cause(cop0, CAUSEF_BD);
else
kvm_clear_c0_guest_cause(cop0, CAUSEF_BD);
kvm_debug("[EXL == 0] Delivering TLB MISS @ pc %#lx\n",
arch->pc);
/* Set PC to the exception entry point */
arch->pc = KVM_GUEST_KSEG0 + 0x0;
} else {
kvm_debug("[EXL == 1] Delivering TLB MISS @ pc %#lx\n",
arch->pc);
arch->pc = KVM_GUEST_KSEG0 + 0x180;
}
kvm_change_c0_guest_cause(cop0, (0xff),
(T_TLB_ST_MISS << CAUSEB_EXCCODE));
/* setup badvaddr, context and entryhi registers for the guest */
kvm_write_c0_guest_badvaddr(cop0, vcpu->arch.host_cp0_badvaddr);
/* XXXKYMA: is the context register used by linux??? */
kvm_write_c0_guest_entryhi(cop0, entryhi);
/* Blow away the shadow host TLBs */
kvm_mips_flush_host_tlb(1);
return er;
}
enum emulation_result
kvm_mips_emulate_tlbinv_st(unsigned long cause, uint32_t *opc,
struct kvm_run *run, struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
struct kvm_vcpu_arch *arch = &vcpu->arch;
enum emulation_result er = EMULATE_DONE;
unsigned long entryhi = (vcpu->arch.host_cp0_badvaddr & VPN2_MASK) |
(kvm_read_c0_guest_entryhi(cop0) & ASID_MASK);
if ((kvm_read_c0_guest_status(cop0) & ST0_EXL) == 0) {
/* save old pc */
kvm_write_c0_guest_epc(cop0, arch->pc);
kvm_set_c0_guest_status(cop0, ST0_EXL);
if (cause & CAUSEF_BD)
kvm_set_c0_guest_cause(cop0, CAUSEF_BD);
else
kvm_clear_c0_guest_cause(cop0, CAUSEF_BD);
kvm_debug("[EXL == 0] Delivering TLB MISS @ pc %#lx\n",
arch->pc);
/* Set PC to the exception entry point */
arch->pc = KVM_GUEST_KSEG0 + 0x180;
} else {
kvm_debug("[EXL == 1] Delivering TLB MISS @ pc %#lx\n",
arch->pc);
arch->pc = KVM_GUEST_KSEG0 + 0x180;
}
kvm_change_c0_guest_cause(cop0, (0xff),
(T_TLB_ST_MISS << CAUSEB_EXCCODE));
/* setup badvaddr, context and entryhi registers for the guest */
kvm_write_c0_guest_badvaddr(cop0, vcpu->arch.host_cp0_badvaddr);
/* XXXKYMA: is the context register used by linux??? */
kvm_write_c0_guest_entryhi(cop0, entryhi);
/* Blow away the shadow host TLBs */
kvm_mips_flush_host_tlb(1);
return er;
}
/* TLBMOD: store into address matching TLB with Dirty bit off */
enum emulation_result
kvm_mips_handle_tlbmod(unsigned long cause, uint32_t *opc,
struct kvm_run *run, struct kvm_vcpu *vcpu)
{
enum emulation_result er = EMULATE_DONE;
#ifdef DEBUG
/*
* If address not in the guest TLB, then we are in trouble
*/
index = kvm_mips_guest_tlb_lookup(vcpu, entryhi);
if (index < 0) {
/* XXXKYMA Invalidate and retry */
kvm_mips_host_tlb_inv(vcpu, vcpu->arch.host_cp0_badvaddr);
kvm_err("%s: host got TLBMOD for %#lx but entry not present in Guest TLB\n",
__func__, entryhi);
kvm_mips_dump_guest_tlbs(vcpu);
kvm_mips_dump_host_tlbs();
return EMULATE_FAIL;
}
#endif
er = kvm_mips_emulate_tlbmod(cause, opc, run, vcpu);
return er;
}
enum emulation_result
kvm_mips_emulate_tlbmod(unsigned long cause, uint32_t *opc,
struct kvm_run *run, struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
unsigned long entryhi = (vcpu->arch.host_cp0_badvaddr & VPN2_MASK) |
(kvm_read_c0_guest_entryhi(cop0) & ASID_MASK);
struct kvm_vcpu_arch *arch = &vcpu->arch;
enum emulation_result er = EMULATE_DONE;
if ((kvm_read_c0_guest_status(cop0) & ST0_EXL) == 0) {
/* save old pc */
kvm_write_c0_guest_epc(cop0, arch->pc);
kvm_set_c0_guest_status(cop0, ST0_EXL);
if (cause & CAUSEF_BD)
kvm_set_c0_guest_cause(cop0, CAUSEF_BD);
else
kvm_clear_c0_guest_cause(cop0, CAUSEF_BD);
kvm_debug("[EXL == 0] Delivering TLB MOD @ pc %#lx\n",
arch->pc);
arch->pc = KVM_GUEST_KSEG0 + 0x180;
} else {
kvm_debug("[EXL == 1] Delivering TLB MOD @ pc %#lx\n",
arch->pc);
arch->pc = KVM_GUEST_KSEG0 + 0x180;
}
kvm_change_c0_guest_cause(cop0, (0xff), (T_TLB_MOD << CAUSEB_EXCCODE));
/* setup badvaddr, context and entryhi registers for the guest */
kvm_write_c0_guest_badvaddr(cop0, vcpu->arch.host_cp0_badvaddr);
/* XXXKYMA: is the context register used by linux??? */
kvm_write_c0_guest_entryhi(cop0, entryhi);
/* Blow away the shadow host TLBs */
kvm_mips_flush_host_tlb(1);
return er;
}
enum emulation_result
kvm_mips_emulate_fpu_exc(unsigned long cause, uint32_t *opc,
struct kvm_run *run, struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
struct kvm_vcpu_arch *arch = &vcpu->arch;
enum emulation_result er = EMULATE_DONE;
if ((kvm_read_c0_guest_status(cop0) & ST0_EXL) == 0) {
/* save old pc */
kvm_write_c0_guest_epc(cop0, arch->pc);
kvm_set_c0_guest_status(cop0, ST0_EXL);
if (cause & CAUSEF_BD)
kvm_set_c0_guest_cause(cop0, CAUSEF_BD);
else
kvm_clear_c0_guest_cause(cop0, CAUSEF_BD);
}
arch->pc = KVM_GUEST_KSEG0 + 0x180;
kvm_change_c0_guest_cause(cop0, (0xff),
(T_COP_UNUSABLE << CAUSEB_EXCCODE));
kvm_change_c0_guest_cause(cop0, (CAUSEF_CE), (0x1 << CAUSEB_CE));
return er;
}
enum emulation_result
kvm_mips_emulate_ri_exc(unsigned long cause, uint32_t *opc,
struct kvm_run *run, struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
struct kvm_vcpu_arch *arch = &vcpu->arch;
enum emulation_result er = EMULATE_DONE;
if ((kvm_read_c0_guest_status(cop0) & ST0_EXL) == 0) {
/* save old pc */
kvm_write_c0_guest_epc(cop0, arch->pc);
kvm_set_c0_guest_status(cop0, ST0_EXL);
if (cause & CAUSEF_BD)
kvm_set_c0_guest_cause(cop0, CAUSEF_BD);
else
kvm_clear_c0_guest_cause(cop0, CAUSEF_BD);
kvm_debug("Delivering RI @ pc %#lx\n", arch->pc);
kvm_change_c0_guest_cause(cop0, (0xff),
(T_RES_INST << CAUSEB_EXCCODE));
/* Set PC to the exception entry point */
arch->pc = KVM_GUEST_KSEG0 + 0x180;
} else {
kvm_err("Trying to deliver RI when EXL is already set\n");
er = EMULATE_FAIL;
}
return er;
}
enum emulation_result
kvm_mips_emulate_bp_exc(unsigned long cause, uint32_t *opc,
struct kvm_run *run, struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
struct kvm_vcpu_arch *arch = &vcpu->arch;
enum emulation_result er = EMULATE_DONE;
if ((kvm_read_c0_guest_status(cop0) & ST0_EXL) == 0) {
/* save old pc */
kvm_write_c0_guest_epc(cop0, arch->pc);
kvm_set_c0_guest_status(cop0, ST0_EXL);
if (cause & CAUSEF_BD)
kvm_set_c0_guest_cause(cop0, CAUSEF_BD);
else
kvm_clear_c0_guest_cause(cop0, CAUSEF_BD);
kvm_debug("Delivering BP @ pc %#lx\n", arch->pc);
kvm_change_c0_guest_cause(cop0, (0xff),
(T_BREAK << CAUSEB_EXCCODE));
/* Set PC to the exception entry point */
arch->pc = KVM_GUEST_KSEG0 + 0x180;
} else {
printk("Trying to deliver BP when EXL is already set\n");
er = EMULATE_FAIL;
}
return er;
}
/*
* ll/sc, rdhwr, sync emulation
*/
#define OPCODE 0xfc000000
#define BASE 0x03e00000
#define RT 0x001f0000
#define OFFSET 0x0000ffff
#define LL 0xc0000000
#define SC 0xe0000000
#define SPEC0 0x00000000
#define SPEC3 0x7c000000
#define RD 0x0000f800
#define FUNC 0x0000003f
#define SYNC 0x0000000f
#define RDHWR 0x0000003b
enum emulation_result
kvm_mips_handle_ri(unsigned long cause, uint32_t *opc,
struct kvm_run *run, struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
struct kvm_vcpu_arch *arch = &vcpu->arch;
enum emulation_result er = EMULATE_DONE;
unsigned long curr_pc;
uint32_t inst;
/*
* Update PC and hold onto current PC in case there is
* an error and we want to rollback the PC
*/
curr_pc = vcpu->arch.pc;
er = update_pc(vcpu, cause);
if (er == EMULATE_FAIL)
return er;
/*
* Fetch the instruction.
*/
if (cause & CAUSEF_BD)
opc += 1;
inst = kvm_get_inst(opc, vcpu);
if (inst == KVM_INVALID_INST) {
printk("%s: Cannot get inst @ %p\n", __func__, opc);
return EMULATE_FAIL;
}
if ((inst & OPCODE) == SPEC3 && (inst & FUNC) == RDHWR) {
int rd = (inst & RD) >> 11;
int rt = (inst & RT) >> 16;
switch (rd) {
case 0: /* CPU number */
arch->gprs[rt] = 0;
break;
case 1: /* SYNCI length */
arch->gprs[rt] = min(current_cpu_data.dcache.linesz,
current_cpu_data.icache.linesz);
break;
case 2: /* Read count register */
printk("RDHWR: Cont register\n");
arch->gprs[rt] = kvm_read_c0_guest_count(cop0);
break;
case 3: /* Count register resolution */
switch (current_cpu_data.cputype) {
case CPU_20KC:
case CPU_25KF:
arch->gprs[rt] = 1;
break;
default:
arch->gprs[rt] = 2;
}
break;
case 29:
#if 1
arch->gprs[rt] = kvm_read_c0_guest_userlocal(cop0);
#else
/* UserLocal not implemented */
er = kvm_mips_emulate_ri_exc(cause, opc, run, vcpu);
#endif
break;
default:
printk("RDHWR not supported\n");
er = EMULATE_FAIL;
break;
}
} else {
printk("Emulate RI not supported @ %p: %#x\n", opc, inst);
er = EMULATE_FAIL;
}
/*
* Rollback PC only if emulation was unsuccessful
*/
if (er == EMULATE_FAIL) {
vcpu->arch.pc = curr_pc;
}
return er;
}
enum emulation_result
kvm_mips_complete_mmio_load(struct kvm_vcpu *vcpu, struct kvm_run *run)
{
unsigned long *gpr = &vcpu->arch.gprs[vcpu->arch.io_gpr];
enum emulation_result er = EMULATE_DONE;
unsigned long curr_pc;
if (run->mmio.len > sizeof(*gpr)) {
printk("Bad MMIO length: %d", run->mmio.len);
er = EMULATE_FAIL;
goto done;
}
/*
* Update PC and hold onto current PC in case there is
* an error and we want to rollback the PC
*/
curr_pc = vcpu->arch.pc;
er = update_pc(vcpu, vcpu->arch.pending_load_cause);
if (er == EMULATE_FAIL)
return er;
switch (run->mmio.len) {
case 4:
*gpr = *(int32_t *) run->mmio.data;
break;
case 2:
if (vcpu->mmio_needed == 2)
*gpr = *(int16_t *) run->mmio.data;
else
*gpr = *(int16_t *) run->mmio.data;
break;
case 1:
if (vcpu->mmio_needed == 2)
*gpr = *(int8_t *) run->mmio.data;
else
*gpr = *(u8 *) run->mmio.data;
break;
}
if (vcpu->arch.pending_load_cause & CAUSEF_BD)
kvm_debug
("[%#lx] Completing %d byte BD Load to gpr %d (0x%08lx) type %d\n",
vcpu->arch.pc, run->mmio.len, vcpu->arch.io_gpr, *gpr,
vcpu->mmio_needed);
done:
return er;
}
static enum emulation_result
kvm_mips_emulate_exc(unsigned long cause, uint32_t *opc,
struct kvm_run *run, struct kvm_vcpu *vcpu)
{
uint32_t exccode = (cause >> CAUSEB_EXCCODE) & 0x1f;
struct mips_coproc *cop0 = vcpu->arch.cop0;
struct kvm_vcpu_arch *arch = &vcpu->arch;
enum emulation_result er = EMULATE_DONE;
if ((kvm_read_c0_guest_status(cop0) & ST0_EXL) == 0) {
/* save old pc */
kvm_write_c0_guest_epc(cop0, arch->pc);
kvm_set_c0_guest_status(cop0, ST0_EXL);
if (cause & CAUSEF_BD)
kvm_set_c0_guest_cause(cop0, CAUSEF_BD);
else
kvm_clear_c0_guest_cause(cop0, CAUSEF_BD);
kvm_change_c0_guest_cause(cop0, (0xff),
(exccode << CAUSEB_EXCCODE));
/* Set PC to the exception entry point */
arch->pc = KVM_GUEST_KSEG0 + 0x180;
kvm_write_c0_guest_badvaddr(cop0, vcpu->arch.host_cp0_badvaddr);
kvm_debug("Delivering EXC %d @ pc %#lx, badVaddr: %#lx\n",
exccode, kvm_read_c0_guest_epc(cop0),
kvm_read_c0_guest_badvaddr(cop0));
} else {
printk("Trying to deliver EXC when EXL is already set\n");
er = EMULATE_FAIL;
}
return er;
}
enum emulation_result
kvm_mips_check_privilege(unsigned long cause, uint32_t *opc,
struct kvm_run *run, struct kvm_vcpu *vcpu)
{
enum emulation_result er = EMULATE_DONE;
uint32_t exccode = (cause >> CAUSEB_EXCCODE) & 0x1f;
unsigned long badvaddr = vcpu->arch.host_cp0_badvaddr;
int usermode = !KVM_GUEST_KERNEL_MODE(vcpu);
if (usermode) {
switch (exccode) {
case T_INT:
case T_SYSCALL:
case T_BREAK:
case T_RES_INST:
break;
case T_COP_UNUSABLE:
if (((cause & CAUSEF_CE) >> CAUSEB_CE) == 0)
er = EMULATE_PRIV_FAIL;
break;
case T_TLB_MOD:
break;
case T_TLB_LD_MISS:
/* We we are accessing Guest kernel space, then send an address error exception to the guest */
if (badvaddr >= (unsigned long) KVM_GUEST_KSEG0) {
printk("%s: LD MISS @ %#lx\n", __func__,
badvaddr);
cause &= ~0xff;
cause |= (T_ADDR_ERR_LD << CAUSEB_EXCCODE);
er = EMULATE_PRIV_FAIL;
}
break;
case T_TLB_ST_MISS:
/* We we are accessing Guest kernel space, then send an address error exception to the guest */
if (badvaddr >= (unsigned long) KVM_GUEST_KSEG0) {
printk("%s: ST MISS @ %#lx\n", __func__,
badvaddr);
cause &= ~0xff;
cause |= (T_ADDR_ERR_ST << CAUSEB_EXCCODE);
er = EMULATE_PRIV_FAIL;
}
break;
case T_ADDR_ERR_ST:
printk("%s: address error ST @ %#lx\n", __func__,
badvaddr);
if ((badvaddr & PAGE_MASK) == KVM_GUEST_COMMPAGE_ADDR) {
cause &= ~0xff;
cause |= (T_TLB_ST_MISS << CAUSEB_EXCCODE);
}
er = EMULATE_PRIV_FAIL;
break;
case T_ADDR_ERR_LD:
printk("%s: address error LD @ %#lx\n", __func__,
badvaddr);
if ((badvaddr & PAGE_MASK) == KVM_GUEST_COMMPAGE_ADDR) {
cause &= ~0xff;
cause |= (T_TLB_LD_MISS << CAUSEB_EXCCODE);
}
er = EMULATE_PRIV_FAIL;
break;
default:
er = EMULATE_PRIV_FAIL;
break;
}
}
if (er == EMULATE_PRIV_FAIL) {
kvm_mips_emulate_exc(cause, opc, run, vcpu);
}
return er;
}
/* User Address (UA) fault, this could happen if
* (1) TLB entry not present/valid in both Guest and shadow host TLBs, in this
* case we pass on the fault to the guest kernel and let it handle it.
* (2) TLB entry is present in the Guest TLB but not in the shadow, in this
* case we inject the TLB from the Guest TLB into the shadow host TLB
*/
enum emulation_result
kvm_mips_handle_tlbmiss(unsigned long cause, uint32_t *opc,
struct kvm_run *run, struct kvm_vcpu *vcpu)
{
enum emulation_result er = EMULATE_DONE;
uint32_t exccode = (cause >> CAUSEB_EXCCODE) & 0x1f;
unsigned long va = vcpu->arch.host_cp0_badvaddr;
int index;
kvm_debug("kvm_mips_handle_tlbmiss: badvaddr: %#lx, entryhi: %#lx\n",
vcpu->arch.host_cp0_badvaddr, vcpu->arch.host_cp0_entryhi);
/* KVM would not have got the exception if this entry was valid in the shadow host TLB
* Check the Guest TLB, if the entry is not there then send the guest an
* exception. The guest exc handler should then inject an entry into the
* guest TLB
*/
index = kvm_mips_guest_tlb_lookup(vcpu,
(va & VPN2_MASK) |
(kvm_read_c0_guest_entryhi
(vcpu->arch.cop0) & ASID_MASK));
if (index < 0) {
if (exccode == T_TLB_LD_MISS) {
er = kvm_mips_emulate_tlbmiss_ld(cause, opc, run, vcpu);
} else if (exccode == T_TLB_ST_MISS) {
er = kvm_mips_emulate_tlbmiss_st(cause, opc, run, vcpu);
} else {
printk("%s: invalid exc code: %d\n", __func__, exccode);
er = EMULATE_FAIL;
}
} else {
struct kvm_mips_tlb *tlb = &vcpu->arch.guest_tlb[index];
/* Check if the entry is valid, if not then setup a TLB invalid exception to the guest */
if (!TLB_IS_VALID(*tlb, va)) {
if (exccode == T_TLB_LD_MISS) {
er = kvm_mips_emulate_tlbinv_ld(cause, opc, run,
vcpu);
} else if (exccode == T_TLB_ST_MISS) {
er = kvm_mips_emulate_tlbinv_st(cause, opc, run,
vcpu);
} else {
printk("%s: invalid exc code: %d\n", __func__,
exccode);
er = EMULATE_FAIL;
}
} else {
#ifdef DEBUG
kvm_debug
("Injecting hi: %#lx, lo0: %#lx, lo1: %#lx into shadow host TLB\n",
tlb->tlb_hi, tlb->tlb_lo0, tlb->tlb_lo1);
#endif
/* OK we have a Guest TLB entry, now inject it into the shadow host TLB */
kvm_mips_handle_mapped_seg_tlb_fault(vcpu, tlb, NULL,
NULL);
}
}
return er;
}
arch/mips/kvm/kvm_mips_int.c 0 → 100644
View file @ 5e0e61dd
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* KVM/MIPS: Interrupt delivery
*
* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
* Authors: Sanjay Lal <sanjayl@kymasys.com>
*/
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/vmalloc.h>
#include <linux/fs.h>
#include <linux/bootmem.h>
#include <asm/page.h>
#include <asm/cacheflush.h>
#include <linux/kvm_host.h>
#include "kvm_mips_int.h"
void kvm_mips_queue_irq(struct kvm_vcpu *vcpu, uint32_t priority)
{
set_bit(priority, &vcpu->arch.pending_exceptions);
}
void kvm_mips_dequeue_irq(struct kvm_vcpu *vcpu, uint32_t priority)
{
clear_bit(priority, &vcpu->arch.pending_exceptions);
}
void kvm_mips_queue_timer_int_cb(struct kvm_vcpu *vcpu)
{
/* Cause bits to reflect the pending timer interrupt,
* the EXC code will be set when we are actually
* delivering the interrupt:
*/
kvm_set_c0_guest_cause(vcpu->arch.cop0, (C_IRQ5 | C_TI));
/* Queue up an INT exception for the core */
kvm_mips_queue_irq(vcpu, MIPS_EXC_INT_TIMER);
}
void kvm_mips_dequeue_timer_int_cb(struct kvm_vcpu *vcpu)
{
kvm_clear_c0_guest_cause(vcpu->arch.cop0, (C_IRQ5 | C_TI));
kvm_mips_dequeue_irq(vcpu, MIPS_EXC_INT_TIMER);
}
void
kvm_mips_queue_io_int_cb(struct kvm_vcpu *vcpu, struct kvm_mips_interrupt *irq)
{
int intr = (int)irq->irq;
/* Cause bits to reflect the pending IO interrupt,
* the EXC code will be set when we are actually
* delivering the interrupt:
*/
switch (intr) {
case 2:
kvm_set_c0_guest_cause(vcpu->arch.cop0, (C_IRQ0));
/* Queue up an INT exception for the core */
kvm_mips_queue_irq(vcpu, MIPS_EXC_INT_IO);
break;
case 3:
kvm_set_c0_guest_cause(vcpu->arch.cop0, (C_IRQ1));
kvm_mips_queue_irq(vcpu, MIPS_EXC_INT_IPI_1);
break;
case 4:
kvm_set_c0_guest_cause(vcpu->arch.cop0, (C_IRQ2));
kvm_mips_queue_irq(vcpu, MIPS_EXC_INT_IPI_2);
break;
default:
break;
}
}
void
kvm_mips_dequeue_io_int_cb(struct kvm_vcpu *vcpu,
struct kvm_mips_interrupt *irq)
{
int intr = (int)irq->irq;
switch (intr) {
case -2:
kvm_clear_c0_guest_cause(vcpu->arch.cop0, (C_IRQ0));
kvm_mips_dequeue_irq(vcpu, MIPS_EXC_INT_IO);
break;
case -3:
kvm_clear_c0_guest_cause(vcpu->arch.cop0, (C_IRQ1));
kvm_mips_dequeue_irq(vcpu, MIPS_EXC_INT_IPI_1);
break;
case -4:
kvm_clear_c0_guest_cause(vcpu->arch.cop0, (C_IRQ2));
kvm_mips_dequeue_irq(vcpu, MIPS_EXC_INT_IPI_2);
break;
default:
break;
}
}
/* Deliver the interrupt of the corresponding priority, if possible. */
int
kvm_mips_irq_deliver_cb(struct kvm_vcpu *vcpu, unsigned int priority,
uint32_t cause)
{
int allowed = 0;
uint32_t exccode;
struct kvm_vcpu_arch *arch = &vcpu->arch;
struct mips_coproc *cop0 = vcpu->arch.cop0;
switch (priority) {
case MIPS_EXC_INT_TIMER:
if ((kvm_read_c0_guest_status(cop0) & ST0_IE)
&& (!(kvm_read_c0_guest_status(cop0) & (ST0_EXL | ST0_ERL)))
&& (kvm_read_c0_guest_status(cop0) & IE_IRQ5)) {
allowed = 1;
exccode = T_INT;
}
break;
case MIPS_EXC_INT_IO:
if ((kvm_read_c0_guest_status(cop0) & ST0_IE)
&& (!(kvm_read_c0_guest_status(cop0) & (ST0_EXL | ST0_ERL)))
&& (kvm_read_c0_guest_status(cop0) & IE_IRQ0)) {
allowed = 1;
exccode = T_INT;
}
break;
case MIPS_EXC_INT_IPI_1:
if ((kvm_read_c0_guest_status(cop0) & ST0_IE)
&& (!(kvm_read_c0_guest_status(cop0) & (ST0_EXL | ST0_ERL)))
&& (kvm_read_c0_guest_status(cop0) & IE_IRQ1)) {
allowed = 1;
exccode = T_INT;
}
break;
case MIPS_EXC_INT_IPI_2:
if ((kvm_read_c0_guest_status(cop0) & ST0_IE)
&& (!(kvm_read_c0_guest_status(cop0) & (ST0_EXL | ST0_ERL)))
&& (kvm_read_c0_guest_status(cop0) & IE_IRQ2)) {
allowed = 1;
exccode = T_INT;
}
break;
default:
break;
}
/* Are we allowed to deliver the interrupt ??? */
if (allowed) {
if ((kvm_read_c0_guest_status(cop0) & ST0_EXL) == 0) {
/* save old pc */
kvm_write_c0_guest_epc(cop0, arch->pc);
kvm_set_c0_guest_status(cop0, ST0_EXL);
if (cause & CAUSEF_BD)
kvm_set_c0_guest_cause(cop0, CAUSEF_BD);
else
kvm_clear_c0_guest_cause(cop0, CAUSEF_BD);
kvm_debug("Delivering INT @ pc %#lx\n", arch->pc);
} else
kvm_err("Trying to deliver interrupt when EXL is already set\n");
kvm_change_c0_guest_cause(cop0, CAUSEF_EXCCODE,
(exccode << CAUSEB_EXCCODE));
/* XXXSL Set PC to the interrupt exception entry point */
if (kvm_read_c0_guest_cause(cop0) & CAUSEF_IV)
arch->pc = KVM_GUEST_KSEG0 + 0x200;
else
arch->pc = KVM_GUEST_KSEG0 + 0x180;
clear_bit(priority, &vcpu->arch.pending_exceptions);
}
return allowed;
}
int
kvm_mips_irq_clear_cb(struct kvm_vcpu *vcpu, unsigned int priority,
uint32_t cause)
{
return 1;
}
void kvm_mips_deliver_interrupts(struct kvm_vcpu *vcpu, uint32_t cause)
{
unsigned long *pending = &vcpu->arch.pending_exceptions;
unsigned long *pending_clr = &vcpu->arch.pending_exceptions_clr;
unsigned int priority;
if (!(*pending) && !(*pending_clr))
return;
priority = __ffs(*pending_clr);
while (priority <= MIPS_EXC_MAX) {
if (kvm_mips_callbacks->irq_clear(vcpu, priority, cause)) {
if (!KVM_MIPS_IRQ_CLEAR_ALL_AT_ONCE)
break;
}
priority = find_next_bit(pending_clr,
BITS_PER_BYTE * sizeof(*pending_clr),
priority + 1);
}
priority = __ffs(*pending);
while (priority <= MIPS_EXC_MAX) {
if (kvm_mips_callbacks->irq_deliver(vcpu, priority, cause)) {
if (!KVM_MIPS_IRQ_DELIVER_ALL_AT_ONCE)
break;
}
priority = find_next_bit(pending,
BITS_PER_BYTE * sizeof(*pending),
priority + 1);
}
}
int kvm_mips_pending_timer(struct kvm_vcpu *vcpu)
{
return test_bit(MIPS_EXC_INT_TIMER, &vcpu->arch.pending_exceptions);
}
arch/mips/kvm/kvm_mips_int.h 0 → 100644
View file @ 5e0e61dd
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* KVM/MIPS: Interrupts
* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
* Authors: Sanjay Lal <sanjayl@kymasys.com>
*/
/* MIPS Exception Priorities, exceptions (including interrupts) are queued up
* for the guest in the order specified by their priorities
*/
#define MIPS_EXC_RESET 0
#define MIPS_EXC_SRESET 1
#define MIPS_EXC_DEBUG_ST 2
#define MIPS_EXC_DEBUG 3
#define MIPS_EXC_DDB 4
#define MIPS_EXC_NMI 5
#define MIPS_EXC_MCHK 6
#define MIPS_EXC_INT_TIMER 7
#define MIPS_EXC_INT_IO 8
#define MIPS_EXC_EXECUTE 9
#define MIPS_EXC_INT_IPI_1 10
#define MIPS_EXC_INT_IPI_2 11
#define MIPS_EXC_MAX 12
/* XXXSL More to follow */
#define C_TI (_ULCAST_(1) << 30)
#define KVM_MIPS_IRQ_DELIVER_ALL_AT_ONCE (0)
#define KVM_MIPS_IRQ_CLEAR_ALL_AT_ONCE (0)
void kvm_mips_queue_irq(struct kvm_vcpu *vcpu, uint32_t priority);
void kvm_mips_dequeue_irq(struct kvm_vcpu *vcpu, uint32_t priority);
int kvm_mips_pending_timer(struct kvm_vcpu *vcpu);
void kvm_mips_queue_timer_int_cb(struct kvm_vcpu *vcpu);
void kvm_mips_dequeue_timer_int_cb(struct kvm_vcpu *vcpu);
void kvm_mips_queue_io_int_cb(struct kvm_vcpu *vcpu,
struct kvm_mips_interrupt *irq);
void kvm_mips_dequeue_io_int_cb(struct kvm_vcpu *vcpu,
struct kvm_mips_interrupt *irq);
int kvm_mips_irq_deliver_cb(struct kvm_vcpu *vcpu, unsigned int priority,
uint32_t cause);
int kvm_mips_irq_clear_cb(struct kvm_vcpu *vcpu, unsigned int priority,
uint32_t cause);
void kvm_mips_deliver_interrupts(struct kvm_vcpu *vcpu, uint32_t cause);
arch/mips/kvm/kvm_mips_opcode.h 0 → 100644
View file @ 5e0e61dd
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
* Authors: Sanjay Lal <sanjayl@kymasys.com>
*/
/*
* Define opcode values not defined in <asm/isnt.h>
*/
#ifndef __KVM_MIPS_OPCODE_H__
#define __KVM_MIPS_OPCODE_H__
/* COP0 Ops */
#define mfmcz_op 0x0b /* 01011 */
#define wrpgpr_op 0x0e /* 01110 */
/* COP0 opcodes (only if COP0 and CO=1): */
#define wait_op 0x20 /* 100000 */
#endif /* __KVM_MIPS_OPCODE_H__ */
arch/mips/kvm/kvm_mips_stats.c 0 → 100644
View file @ 5e0e61dd
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* KVM/MIPS: COP0 access histogram
*
* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
* Authors: Sanjay Lal <sanjayl@kymasys.com>
*/
#include <linux/kvm_host.h>
char *kvm_mips_exit_types_str[MAX_KVM_MIPS_EXIT_TYPES] = {
"WAIT",
"CACHE",
"Signal",
"Interrupt",
"COP0/1 Unusable",
"TLB Mod",
"TLB Miss (LD)",
"TLB Miss (ST)",
"Address Err (ST)",
"Address Error (LD)",
"System Call",
"Reserved Inst",
"Break Inst",
"D-Cache Flushes",
};
char *kvm_cop0_str[N_MIPS_COPROC_REGS] = {
"Index",
"Random",
"EntryLo0",
"EntryLo1",
"Context",
"PG Mask",
"Wired",
"HWREna",
"BadVAddr",
"Count",
"EntryHI",
"Compare",
"Status",
"Cause",
"EXC PC",
"PRID",
"Config",
"LLAddr",
"Watch Lo",
"Watch Hi",
"X Context",
"Reserved",
"Impl Dep",
"Debug",
"DEPC",
"PerfCnt",
"ErrCtl",
"CacheErr",
"TagLo",
"TagHi",
"ErrorEPC",
"DESAVE"
};
int kvm_mips_dump_stats(struct kvm_vcpu *vcpu)
{
#ifdef CONFIG_KVM_MIPS_DEBUG_COP0_COUNTERS
int i, j;
printk("\nKVM VCPU[%d] COP0 Access Profile:\n", vcpu->vcpu_id);
for (i = 0; i < N_MIPS_COPROC_REGS; i++) {
for (j = 0; j < N_MIPS_COPROC_SEL; j++) {
if (vcpu->arch.cop0->stat[i][j])
printk("%s[%d]: %lu\n", kvm_cop0_str[i], j,
vcpu->arch.cop0->stat[i][j]);
}
}
#endif
return 0;
}
arch/mips/kvm/kvm_tlb.c 0 → 100644
View file @ 5e0e61dd
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* KVM/MIPS TLB handling, this file is part of the Linux host kernel so that
* TLB handlers run from KSEG0
*
* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
* Authors: Sanjay Lal <sanjayl@kymasys.com>
*/
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/smp.h>
#include <linux/mm.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/kvm_host.h>
#include <asm/cpu.h>
#include <asm/bootinfo.h>
#include <asm/mmu_context.h>
#include <asm/pgtable.h>
#include <asm/cacheflush.h>
#undef CONFIG_MIPS_MT
#include <asm/r4kcache.h>
#define CONFIG_MIPS_MT
#define KVM_GUEST_PC_TLB 0
#define KVM_GUEST_SP_TLB 1
#define PRIx64 "llx"
/* Use VZ EntryHi.EHINV to invalidate TLB entries */
#define UNIQUE_ENTRYHI(idx) (CKSEG0 + ((idx) << (PAGE_SHIFT + 1)))
atomic_t kvm_mips_instance;
EXPORT_SYMBOL(kvm_mips_instance);
/* These function pointers are initialized once the KVM module is loaded */
pfn_t(*kvm_mips_gfn_to_pfn) (struct kvm *kvm, gfn_t gfn);
EXPORT_SYMBOL(kvm_mips_gfn_to_pfn);
void (*kvm_mips_release_pfn_clean) (pfn_t pfn);
EXPORT_SYMBOL(kvm_mips_release_pfn_clean);
bool(*kvm_mips_is_error_pfn) (pfn_t pfn);
EXPORT_SYMBOL(kvm_mips_is_error_pfn);
uint32_t kvm_mips_get_kernel_asid(struct kvm_vcpu *vcpu)
{
return vcpu->arch.guest_kernel_asid[smp_processor_id()] & ASID_MASK;
}
uint32_t kvm_mips_get_user_asid(struct kvm_vcpu *vcpu)
{
return vcpu->arch.guest_user_asid[smp_processor_id()] & ASID_MASK;
}
inline uint32_t kvm_mips_get_commpage_asid (struct kvm_vcpu *vcpu)
{
return vcpu->kvm->arch.commpage_tlb;
}
/*
* Structure defining an tlb entry data set.
*/
void kvm_mips_dump_host_tlbs(void)
{
unsigned long old_entryhi;
unsigned long old_pagemask;
struct kvm_mips_tlb tlb;
unsigned long flags;
int i;
local_irq_save(flags);
old_entryhi = read_c0_entryhi();
old_pagemask = read_c0_pagemask();
printk("HOST TLBs:\n");
printk("ASID: %#lx\n", read_c0_entryhi() & ASID_MASK);
for (i = 0; i < current_cpu_data.tlbsize; i++) {
write_c0_index(i);
mtc0_tlbw_hazard();
tlb_read();
tlbw_use_hazard();
tlb.tlb_hi = read_c0_entryhi();
tlb.tlb_lo0 = read_c0_entrylo0();
tlb.tlb_lo1 = read_c0_entrylo1();
tlb.tlb_mask = read_c0_pagemask();
printk("TLB%c%3d Hi 0x%08lx ",
(tlb.tlb_lo0 | tlb.tlb_lo1) & MIPS3_PG_V ? ' ' : '*',
i, tlb.tlb_hi);
printk("Lo0=0x%09" PRIx64 " %c%c attr %lx ",
(uint64_t) mips3_tlbpfn_to_paddr(tlb.tlb_lo0),
(tlb.tlb_lo0 & MIPS3_PG_D) ? 'D' : ' ',
(tlb.tlb_lo0 & MIPS3_PG_G) ? 'G' : ' ',
(tlb.tlb_lo0 >> 3) & 7);
printk("Lo1=0x%09" PRIx64 " %c%c attr %lx sz=%lx\n",
(uint64_t) mips3_tlbpfn_to_paddr(tlb.tlb_lo1),
(tlb.tlb_lo1 & MIPS3_PG_D) ? 'D' : ' ',
(tlb.tlb_lo1 & MIPS3_PG_G) ? 'G' : ' ',
(tlb.tlb_lo1 >> 3) & 7, tlb.tlb_mask);
}
write_c0_entryhi(old_entryhi);
write_c0_pagemask(old_pagemask);
mtc0_tlbw_hazard();
local_irq_restore(flags);
}
void kvm_mips_dump_guest_tlbs(struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
struct kvm_mips_tlb tlb;
int i;
printk("Guest TLBs:\n");
printk("Guest EntryHi: %#lx\n", kvm_read_c0_guest_entryhi(cop0));
for (i = 0; i < KVM_MIPS_GUEST_TLB_SIZE; i++) {
tlb = vcpu->arch.guest_tlb[i];
printk("TLB%c%3d Hi 0x%08lx ",
(tlb.tlb_lo0 | tlb.tlb_lo1) & MIPS3_PG_V ? ' ' : '*',
i, tlb.tlb_hi);
printk("Lo0=0x%09" PRIx64 " %c%c attr %lx ",
(uint64_t) mips3_tlbpfn_to_paddr(tlb.tlb_lo0),
(tlb.tlb_lo0 & MIPS3_PG_D) ? 'D' : ' ',
(tlb.tlb_lo0 & MIPS3_PG_G) ? 'G' : ' ',
(tlb.tlb_lo0 >> 3) & 7);
printk("Lo1=0x%09" PRIx64 " %c%c attr %lx sz=%lx\n",
(uint64_t) mips3_tlbpfn_to_paddr(tlb.tlb_lo1),
(tlb.tlb_lo1 & MIPS3_PG_D) ? 'D' : ' ',
(tlb.tlb_lo1 & MIPS3_PG_G) ? 'G' : ' ',
(tlb.tlb_lo1 >> 3) & 7, tlb.tlb_mask);
}
}
void kvm_mips_dump_shadow_tlbs(struct kvm_vcpu *vcpu)
{
int i;
volatile struct kvm_mips_tlb tlb;
printk("Shadow TLBs:\n");
for (i = 0; i < KVM_MIPS_GUEST_TLB_SIZE; i++) {
tlb = vcpu->arch.shadow_tlb[smp_processor_id()][i];
printk("TLB%c%3d Hi 0x%08lx ",
(tlb.tlb_lo0 | tlb.tlb_lo1) & MIPS3_PG_V ? ' ' : '*',
i, tlb.tlb_hi);
printk("Lo0=0x%09" PRIx64 " %c%c attr %lx ",
(uint64_t) mips3_tlbpfn_to_paddr(tlb.tlb_lo0),
(tlb.tlb_lo0 & MIPS3_PG_D) ? 'D' : ' ',
(tlb.tlb_lo0 & MIPS3_PG_G) ? 'G' : ' ',
(tlb.tlb_lo0 >> 3) & 7);
printk("Lo1=0x%09" PRIx64 " %c%c attr %lx sz=%lx\n",
(uint64_t) mips3_tlbpfn_to_paddr(tlb.tlb_lo1),
(tlb.tlb_lo1 & MIPS3_PG_D) ? 'D' : ' ',
(tlb.tlb_lo1 & MIPS3_PG_G) ? 'G' : ' ',
(tlb.tlb_lo1 >> 3) & 7, tlb.tlb_mask);
}
}
static void kvm_mips_map_page(struct kvm *kvm, gfn_t gfn)
{
pfn_t pfn;
if (kvm->arch.guest_pmap[gfn] != KVM_INVALID_PAGE)
return;
pfn = kvm_mips_gfn_to_pfn(kvm, gfn);
if (kvm_mips_is_error_pfn(pfn)) {
panic("Couldn't get pfn for gfn %#" PRIx64 "!\n", gfn);
}
kvm->arch.guest_pmap[gfn] = pfn;
return;
}
/* Translate guest KSEG0 addresses to Host PA */
unsigned long kvm_mips_translate_guest_kseg0_to_hpa(struct kvm_vcpu *vcpu,
unsigned long gva)
{
gfn_t gfn;
uint32_t offset = gva & ~PAGE_MASK;
struct kvm *kvm = vcpu->kvm;
if (KVM_GUEST_KSEGX(gva) != KVM_GUEST_KSEG0) {
kvm_err("%s/%p: Invalid gva: %#lx\n", __func__,
__builtin_return_address(0), gva);
return KVM_INVALID_PAGE;
}
gfn = (KVM_GUEST_CPHYSADDR(gva) >> PAGE_SHIFT);
if (gfn >= kvm->arch.guest_pmap_npages) {
kvm_err("%s: Invalid gfn: %#llx, GVA: %#lx\n", __func__, gfn,
gva);
return KVM_INVALID_PAGE;
}
kvm_mips_map_page(vcpu->kvm, gfn);
return (kvm->arch.guest_pmap[gfn] << PAGE_SHIFT) + offset;
}
/* XXXKYMA: Must be called with interrupts disabled */
/* set flush_dcache_mask == 0 if no dcache flush required */
int
kvm_mips_host_tlb_write(struct kvm_vcpu *vcpu, unsigned long entryhi,
unsigned long entrylo0, unsigned long entrylo1, int flush_dcache_mask)
{
unsigned long flags;
unsigned long old_entryhi;
volatile int idx;
local_irq_save(flags);
old_entryhi = read_c0_entryhi();
write_c0_entryhi(entryhi);
mtc0_tlbw_hazard();
tlb_probe();
tlb_probe_hazard();
idx = read_c0_index();
if (idx > current_cpu_data.tlbsize) {
kvm_err("%s: Invalid Index: %d\n", __func__, idx);
kvm_mips_dump_host_tlbs();
return -1;
}
if (idx < 0) {
idx = read_c0_random() % current_cpu_data.tlbsize;
write_c0_index(idx);
mtc0_tlbw_hazard();
}
write_c0_entrylo0(entrylo0);
write_c0_entrylo1(entrylo1);
mtc0_tlbw_hazard();
tlb_write_indexed();
tlbw_use_hazard();
#ifdef DEBUG
if (debug) {
kvm_debug("@ %#lx idx: %2d [entryhi(R): %#lx] "
"entrylo0(R): 0x%08lx, entrylo1(R): 0x%08lx\n",
vcpu->arch.pc, idx, read_c0_entryhi(),
read_c0_entrylo0(), read_c0_entrylo1());
}
#endif
/* Flush D-cache */
if (flush_dcache_mask) {
if (entrylo0 & MIPS3_PG_V) {
++vcpu->stat.flush_dcache_exits;
flush_data_cache_page((entryhi & VPN2_MASK) & ~flush_dcache_mask);
}
if (entrylo1 & MIPS3_PG_V) {
++vcpu->stat.flush_dcache_exits;
flush_data_cache_page(((entryhi & VPN2_MASK) & ~flush_dcache_mask) |
(0x1 << PAGE_SHIFT));
}
}
/* Restore old ASID */
write_c0_entryhi(old_entryhi);
mtc0_tlbw_hazard();
tlbw_use_hazard();
local_irq_restore(flags);
return 0;
}
/* XXXKYMA: Must be called with interrupts disabled */
int kvm_mips_handle_kseg0_tlb_fault(unsigned long badvaddr,
struct kvm_vcpu *vcpu)
{
gfn_t gfn;
pfn_t pfn0, pfn1;
unsigned long vaddr = 0;
unsigned long entryhi = 0, entrylo0 = 0, entrylo1 = 0;
int even;
struct kvm *kvm = vcpu->kvm;
const int flush_dcache_mask = 0;
if (KVM_GUEST_KSEGX(badvaddr) != KVM_GUEST_KSEG0) {
kvm_err("%s: Invalid BadVaddr: %#lx\n", __func__, badvaddr);
kvm_mips_dump_host_tlbs();
return -1;
}
gfn = (KVM_GUEST_CPHYSADDR(badvaddr) >> PAGE_SHIFT);
if (gfn >= kvm->arch.guest_pmap_npages) {
kvm_err("%s: Invalid gfn: %#llx, BadVaddr: %#lx\n", __func__,
gfn, badvaddr);
kvm_mips_dump_host_tlbs();
return -1;
}
even = !(gfn & 0x1);
vaddr = badvaddr & (PAGE_MASK << 1);
kvm_mips_map_page(vcpu->kvm, gfn);
kvm_mips_map_page(vcpu->kvm, gfn ^ 0x1);
if (even) {
pfn0 = kvm->arch.guest_pmap[gfn];
pfn1 = kvm->arch.guest_pmap[gfn ^ 0x1];
} else {
pfn0 = kvm->arch.guest_pmap[gfn ^ 0x1];
pfn1 = kvm->arch.guest_pmap[gfn];
}
entryhi = (vaddr | kvm_mips_get_kernel_asid(vcpu));
entrylo0 = mips3_paddr_to_tlbpfn(pfn0 << PAGE_SHIFT) | (0x3 << 3) | (1 << 2) |
(0x1 << 1);
entrylo1 = mips3_paddr_to_tlbpfn(pfn1 << PAGE_SHIFT) | (0x3 << 3) | (1 << 2) |
(0x1 << 1);
return kvm_mips_host_tlb_write(vcpu, entryhi, entrylo0, entrylo1,
flush_dcache_mask);
}
int kvm_mips_handle_commpage_tlb_fault(unsigned long badvaddr,
struct kvm_vcpu *vcpu)
{
pfn_t pfn0, pfn1;
unsigned long flags, old_entryhi = 0, vaddr = 0;
unsigned long entrylo0 = 0, entrylo1 = 0;
pfn0 = CPHYSADDR(vcpu->arch.kseg0_commpage) >> PAGE_SHIFT;
pfn1 = 0;
entrylo0 = mips3_paddr_to_tlbpfn(pfn0 << PAGE_SHIFT) | (0x3 << 3) | (1 << 2) |
(0x1 << 1);
entrylo1 = 0;
local_irq_save(flags);
old_entryhi = read_c0_entryhi();
vaddr = badvaddr & (PAGE_MASK << 1);
write_c0_entryhi(vaddr | kvm_mips_get_kernel_asid(vcpu));
mtc0_tlbw_hazard();
write_c0_entrylo0(entrylo0);
mtc0_tlbw_hazard();
write_c0_entrylo1(entrylo1);
mtc0_tlbw_hazard();
write_c0_index(kvm_mips_get_commpage_asid(vcpu));
mtc0_tlbw_hazard();
tlb_write_indexed();
mtc0_tlbw_hazard();
tlbw_use_hazard();
#ifdef DEBUG
kvm_debug ("@ %#lx idx: %2d [entryhi(R): %#lx] entrylo0 (R): 0x%08lx, entrylo1(R): 0x%08lx\n",
vcpu->arch.pc, read_c0_index(), read_c0_entryhi(),
read_c0_entrylo0(), read_c0_entrylo1());
#endif
/* Restore old ASID */
write_c0_entryhi(old_entryhi);
mtc0_tlbw_hazard();
tlbw_use_hazard();
local_irq_restore(flags);
return 0;
}
int
kvm_mips_handle_mapped_seg_tlb_fault(struct kvm_vcpu *vcpu,
struct kvm_mips_tlb *tlb, unsigned long *hpa0, unsigned long *hpa1)
{
unsigned long entryhi = 0, entrylo0 = 0, entrylo1 = 0;
struct kvm *kvm = vcpu->kvm;
pfn_t pfn0, pfn1;
if ((tlb->tlb_hi & VPN2_MASK) == 0) {
pfn0 = 0;
pfn1 = 0;
} else {
kvm_mips_map_page(kvm, mips3_tlbpfn_to_paddr(tlb->tlb_lo0) >> PAGE_SHIFT);
kvm_mips_map_page(kvm, mips3_tlbpfn_to_paddr(tlb->tlb_lo1) >> PAGE_SHIFT);
pfn0 = kvm->arch.guest_pmap[mips3_tlbpfn_to_paddr(tlb->tlb_lo0) >> PAGE_SHIFT];
pfn1 = kvm->arch.guest_pmap[mips3_tlbpfn_to_paddr(tlb->tlb_lo1) >> PAGE_SHIFT];
}
if (hpa0)
*hpa0 = pfn0 << PAGE_SHIFT;
if (hpa1)
*hpa1 = pfn1 << PAGE_SHIFT;
/* Get attributes from the Guest TLB */
entryhi = (tlb->tlb_hi & VPN2_MASK) | (KVM_GUEST_KERNEL_MODE(vcpu) ?
kvm_mips_get_kernel_asid(vcpu) : kvm_mips_get_user_asid(vcpu));
entrylo0 = mips3_paddr_to_tlbpfn(pfn0 << PAGE_SHIFT) | (0x3 << 3) |
(tlb->tlb_lo0 & MIPS3_PG_D) | (tlb->tlb_lo0 & MIPS3_PG_V);
entrylo1 = mips3_paddr_to_tlbpfn(pfn1 << PAGE_SHIFT) | (0x3 << 3) |
(tlb->tlb_lo1 & MIPS3_PG_D) | (tlb->tlb_lo1 & MIPS3_PG_V);
#ifdef DEBUG
kvm_debug("@ %#lx tlb_lo0: 0x%08lx tlb_lo1: 0x%08lx\n", vcpu->arch.pc,
tlb->tlb_lo0, tlb->tlb_lo1);
#endif
return kvm_mips_host_tlb_write(vcpu, entryhi, entrylo0, entrylo1,
tlb->tlb_mask);
}
int kvm_mips_guest_tlb_lookup(struct kvm_vcpu *vcpu, unsigned long entryhi)
{
int i;
int index = -1;
struct kvm_mips_tlb *tlb = vcpu->arch.guest_tlb;
for (i = 0; i < KVM_MIPS_GUEST_TLB_SIZE; i++) {
if (((TLB_VPN2(tlb[i]) & ~tlb[i].tlb_mask) == ((entryhi & VPN2_MASK) & ~tlb[i].tlb_mask)) &&
(TLB_IS_GLOBAL(tlb[i]) || (TLB_ASID(tlb[i]) == (entryhi & ASID_MASK)))) {
index = i;
break;
}
}
#ifdef DEBUG
kvm_debug("%s: entryhi: %#lx, index: %d lo0: %#lx, lo1: %#lx\n",
__func__, entryhi, index, tlb[i].tlb_lo0, tlb[i].tlb_lo1);
#endif
return index;
}
int kvm_mips_host_tlb_lookup(struct kvm_vcpu *vcpu, unsigned long vaddr)
{
unsigned long old_entryhi, flags;
volatile int idx;
local_irq_save(flags);
old_entryhi = read_c0_entryhi();
if (KVM_GUEST_KERNEL_MODE(vcpu))
write_c0_entryhi((vaddr & VPN2_MASK) | kvm_mips_get_kernel_asid(vcpu));
else {
write_c0_entryhi((vaddr & VPN2_MASK) | kvm_mips_get_user_asid(vcpu));
}
mtc0_tlbw_hazard();
tlb_probe();
tlb_probe_hazard();
idx = read_c0_index();
/* Restore old ASID */
write_c0_entryhi(old_entryhi);
mtc0_tlbw_hazard();
tlbw_use_hazard();
local_irq_restore(flags);
#ifdef DEBUG
kvm_debug("Host TLB lookup, %#lx, idx: %2d\n", vaddr, idx);
#endif
return idx;
}
int kvm_mips_host_tlb_inv(struct kvm_vcpu *vcpu, unsigned long va)
{
int idx;
unsigned long flags, old_entryhi;
local_irq_save(flags);
old_entryhi = read_c0_entryhi();
write_c0_entryhi((va & VPN2_MASK) | kvm_mips_get_user_asid(vcpu));
mtc0_tlbw_hazard();
tlb_probe();
tlb_probe_hazard();
idx = read_c0_index();
if (idx >= current_cpu_data.tlbsize)
BUG();
if (idx > 0) {
write_c0_entryhi(UNIQUE_ENTRYHI(idx));
mtc0_tlbw_hazard();
write_c0_entrylo0(0);
mtc0_tlbw_hazard();
write_c0_entrylo1(0);
mtc0_tlbw_hazard();
tlb_write_indexed();
mtc0_tlbw_hazard();
}
write_c0_entryhi(old_entryhi);
mtc0_tlbw_hazard();
tlbw_use_hazard();
local_irq_restore(flags);
#ifdef DEBUG
if (idx > 0) {
kvm_debug("%s: Invalidated entryhi %#lx @ idx %d\n", __func__,
(va & VPN2_MASK) | (vcpu->arch.asid_map[va & ASID_MASK] & ASID_MASK), idx);
}
#endif
return 0;
}
/* XXXKYMA: Fix Guest USER/KERNEL no longer share the same ASID*/
int kvm_mips_host_tlb_inv_index(struct kvm_vcpu *vcpu, int index)
{
unsigned long flags, old_entryhi;
if (index >= current_cpu_data.tlbsize)
BUG();
local_irq_save(flags);
old_entryhi = read_c0_entryhi();
write_c0_entryhi(UNIQUE_ENTRYHI(index));
mtc0_tlbw_hazard();
write_c0_index(index);
mtc0_tlbw_hazard();
write_c0_entrylo0(0);
mtc0_tlbw_hazard();
write_c0_entrylo1(0);
mtc0_tlbw_hazard();
tlb_write_indexed();
mtc0_tlbw_hazard();
tlbw_use_hazard();
write_c0_entryhi(old_entryhi);
mtc0_tlbw_hazard();
tlbw_use_hazard();
local_irq_restore(flags);
return 0;
}
void kvm_mips_flush_host_tlb(int skip_kseg0)
{
unsigned long flags;
unsigned long old_entryhi, entryhi;
unsigned long old_pagemask;
int entry = 0;
int maxentry = current_cpu_data.tlbsize;
local_irq_save(flags);
old_entryhi = read_c0_entryhi();
old_pagemask = read_c0_pagemask();
/* Blast 'em all away. */
for (entry = 0; entry < maxentry; entry++) {
write_c0_index(entry);
mtc0_tlbw_hazard();
if (skip_kseg0) {
tlb_read();
tlbw_use_hazard();
entryhi = read_c0_entryhi();
/* Don't blow away guest kernel entries */
if (KVM_GUEST_KSEGX(entryhi) == KVM_GUEST_KSEG0) {
continue;
}
}
/* Make sure all entries differ. */
write_c0_entryhi(UNIQUE_ENTRYHI(entry));
mtc0_tlbw_hazard();
write_c0_entrylo0(0);
mtc0_tlbw_hazard();
write_c0_entrylo1(0);
mtc0_tlbw_hazard();
tlb_write_indexed();
mtc0_tlbw_hazard();
}
tlbw_use_hazard();
write_c0_entryhi(old_entryhi);
write_c0_pagemask(old_pagemask);
mtc0_tlbw_hazard();
tlbw_use_hazard();
local_irq_restore(flags);
}
void
kvm_get_new_mmu_context(struct mm_struct *mm, unsigned long cpu,
struct kvm_vcpu *vcpu)
{
unsigned long asid = asid_cache(cpu);
if (!((asid += ASID_INC) & ASID_MASK)) {
if (cpu_has_vtag_icache) {
flush_icache_all();
}
kvm_local_flush_tlb_all(); /* start new asid cycle */
if (!asid) /* fix version if needed */
asid = ASID_FIRST_VERSION;
}
cpu_context(cpu, mm) = asid_cache(cpu) = asid;
}
void kvm_shadow_tlb_put(struct kvm_vcpu *vcpu)
{
unsigned long flags;
unsigned long old_entryhi;
unsigned long old_pagemask;
int entry = 0;
int cpu = smp_processor_id();
local_irq_save(flags);
old_entryhi = read_c0_entryhi();
old_pagemask = read_c0_pagemask();
for (entry = 0; entry < current_cpu_data.tlbsize; entry++) {
write_c0_index(entry);
mtc0_tlbw_hazard();
tlb_read();
tlbw_use_hazard();
vcpu->arch.shadow_tlb[cpu][entry].tlb_hi = read_c0_entryhi();
vcpu->arch.shadow_tlb[cpu][entry].tlb_lo0 = read_c0_entrylo0();
vcpu->arch.shadow_tlb[cpu][entry].tlb_lo1 = read_c0_entrylo1();
vcpu->arch.shadow_tlb[cpu][entry].tlb_mask = read_c0_pagemask();
}
write_c0_entryhi(old_entryhi);
write_c0_pagemask(old_pagemask);
mtc0_tlbw_hazard();
local_irq_restore(flags);
}
void kvm_shadow_tlb_load(struct kvm_vcpu *vcpu)
{
unsigned long flags;
unsigned long old_ctx;
int entry;
int cpu = smp_processor_id();
local_irq_save(flags);
old_ctx = read_c0_entryhi();
for (entry = 0; entry < current_cpu_data.tlbsize; entry++) {
write_c0_entryhi(vcpu->arch.shadow_tlb[cpu][entry].tlb_hi);
mtc0_tlbw_hazard();
write_c0_entrylo0(vcpu->arch.shadow_tlb[cpu][entry].tlb_lo0);
write_c0_entrylo1(vcpu->arch.shadow_tlb[cpu][entry].tlb_lo1);
write_c0_index(entry);
mtc0_tlbw_hazard();
tlb_write_indexed();
tlbw_use_hazard();
}
tlbw_use_hazard();
write_c0_entryhi(old_ctx);
mtc0_tlbw_hazard();
local_irq_restore(flags);
}
void kvm_local_flush_tlb_all(void)
{
unsigned long flags;
unsigned long old_ctx;
int entry = 0;
local_irq_save(flags);
/* Save old context and create impossible VPN2 value */
old_ctx = read_c0_entryhi();
write_c0_entrylo0(0);
write_c0_entrylo1(0);
/* Blast 'em all away. */
while (entry < current_cpu_data.tlbsize) {
/* Make sure all entries differ. */
write_c0_entryhi(UNIQUE_ENTRYHI(entry));
write_c0_index(entry);
mtc0_tlbw_hazard();
tlb_write_indexed();
entry++;
}
tlbw_use_hazard();
write_c0_entryhi(old_ctx);
mtc0_tlbw_hazard();
local_irq_restore(flags);
}
void kvm_mips_init_shadow_tlb(struct kvm_vcpu *vcpu)
{
int cpu, entry;
for_each_possible_cpu(cpu) {
for (entry = 0; entry < current_cpu_data.tlbsize; entry++) {
vcpu->arch.shadow_tlb[cpu][entry].tlb_hi =
UNIQUE_ENTRYHI(entry);
vcpu->arch.shadow_tlb[cpu][entry].tlb_lo0 = 0x0;
vcpu->arch.shadow_tlb[cpu][entry].tlb_lo1 = 0x0;
vcpu->arch.shadow_tlb[cpu][entry].tlb_mask =
read_c0_pagemask();
#ifdef DEBUG
kvm_debug
("shadow_tlb[%d][%d]: tlb_hi: %#lx, lo0: %#lx, lo1: %#lx\n",
cpu, entry,
vcpu->arch.shadow_tlb[cpu][entry].tlb_hi,
vcpu->arch.shadow_tlb[cpu][entry].tlb_lo0,
vcpu->arch.shadow_tlb[cpu][entry].tlb_lo1);
#endif
}
}
}
/* Restore ASID once we are scheduled back after preemption */
void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
unsigned long flags;
int newasid = 0;
#ifdef DEBUG
kvm_debug("%s: vcpu %p, cpu: %d\n", __func__, vcpu, cpu);
#endif
/* Alocate new kernel and user ASIDs if needed */
local_irq_save(flags);
if (((vcpu->arch.
guest_kernel_asid[cpu] ^ asid_cache(cpu)) & ASID_VERSION_MASK)) {
kvm_get_new_mmu_context(&vcpu->arch.guest_kernel_mm, cpu, vcpu);
vcpu->arch.guest_kernel_asid[cpu] =
vcpu->arch.guest_kernel_mm.context.asid[cpu];
kvm_get_new_mmu_context(&vcpu->arch.guest_user_mm, cpu, vcpu);
vcpu->arch.guest_user_asid[cpu] =
vcpu->arch.guest_user_mm.context.asid[cpu];
newasid++;
kvm_info("[%d]: cpu_context: %#lx\n", cpu,
cpu_context(cpu, current->mm));
kvm_info("[%d]: Allocated new ASID for Guest Kernel: %#x\n",
cpu, vcpu->arch.guest_kernel_asid[cpu]);
kvm_info("[%d]: Allocated new ASID for Guest User: %#x\n", cpu,
vcpu->arch.guest_user_asid[cpu]);
}
if (vcpu->arch.last_sched_cpu != cpu) {
kvm_info("[%d->%d]KVM VCPU[%d] switch\n",
vcpu->arch.last_sched_cpu, cpu, vcpu->vcpu_id);
}
/* Only reload shadow host TLB if new ASIDs haven't been allocated */
#if 0
if ((atomic_read(&kvm_mips_instance) > 1) && !newasid) {
kvm_mips_flush_host_tlb(0);
kvm_shadow_tlb_load(vcpu);
}
#endif
if (!newasid) {
/* If we preempted while the guest was executing, then reload the pre-empted ASID */
if (current->flags & PF_VCPU) {
write_c0_entryhi(vcpu->arch.
preempt_entryhi & ASID_MASK);
ehb();
}
} else {
/* New ASIDs were allocated for the VM */
/* Were we in guest context? If so then the pre-empted ASID is no longer
* valid, we need to set it to what it should be based on the mode of
* the Guest (Kernel/User)
*/
if (current->flags & PF_VCPU) {
if (KVM_GUEST_KERNEL_MODE(vcpu))
write_c0_entryhi(vcpu->arch.
guest_kernel_asid[cpu] &
ASID_MASK);
else
write_c0_entryhi(vcpu->arch.
guest_user_asid[cpu] &
ASID_MASK);
ehb();
}
}
local_irq_restore(flags);
}
/* ASID can change if another task is scheduled during preemption */
void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
{
unsigned long flags;
uint32_t cpu;
local_irq_save(flags);
cpu = smp_processor_id();
vcpu->arch.preempt_entryhi = read_c0_entryhi();
vcpu->arch.last_sched_cpu = cpu;
#if 0
if ((atomic_read(&kvm_mips_instance) > 1)) {
kvm_shadow_tlb_put(vcpu);
}
#endif
if (((cpu_context(cpu, current->mm) ^ asid_cache(cpu)) &
ASID_VERSION_MASK)) {
kvm_debug("%s: Dropping MMU Context: %#lx\n", __func__,
cpu_context(cpu, current->mm));
drop_mmu_context(current->mm, cpu);
}
write_c0_entryhi(cpu_asid(cpu, current->mm));
ehb();
local_irq_restore(flags);
}
uint32_t kvm_get_inst(uint32_t *opc, struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
unsigned long paddr, flags;
uint32_t inst;
int index;
if (KVM_GUEST_KSEGX((unsigned long) opc) < KVM_GUEST_KSEG0 ||
KVM_GUEST_KSEGX((unsigned long) opc) == KVM_GUEST_KSEG23) {
local_irq_save(flags);
index = kvm_mips_host_tlb_lookup(vcpu, (unsigned long) opc);
if (index >= 0) {
inst = *(opc);
} else {
index =
kvm_mips_guest_tlb_lookup(vcpu,
((unsigned long) opc & VPN2_MASK)
|
(kvm_read_c0_guest_entryhi
(cop0) & ASID_MASK));
if (index < 0) {
kvm_err
("%s: get_user_failed for %p, vcpu: %p, ASID: %#lx\n",
__func__, opc, vcpu, read_c0_entryhi());
kvm_mips_dump_host_tlbs();
local_irq_restore(flags);
return KVM_INVALID_INST;
}
kvm_mips_handle_mapped_seg_tlb_fault(vcpu,
&vcpu->arch.
guest_tlb[index],
NULL, NULL);
inst = *(opc);
}
local_irq_restore(flags);
} else if (KVM_GUEST_KSEGX(opc) == KVM_GUEST_KSEG0) {
paddr =
kvm_mips_translate_guest_kseg0_to_hpa(vcpu,
(unsigned long) opc);
inst = *(uint32_t *) CKSEG0ADDR(paddr);
} else {
kvm_err("%s: illegal address: %p\n", __func__, opc);
return KVM_INVALID_INST;
}
return inst;
}
EXPORT_SYMBOL(kvm_local_flush_tlb_all);
EXPORT_SYMBOL(kvm_shadow_tlb_put);
EXPORT_SYMBOL(kvm_mips_handle_mapped_seg_tlb_fault);
EXPORT_SYMBOL(kvm_mips_handle_commpage_tlb_fault);
EXPORT_SYMBOL(kvm_mips_init_shadow_tlb);
EXPORT_SYMBOL(kvm_mips_dump_host_tlbs);
EXPORT_SYMBOL(kvm_mips_handle_kseg0_tlb_fault);
EXPORT_SYMBOL(kvm_mips_host_tlb_lookup);
EXPORT_SYMBOL(kvm_mips_flush_host_tlb);
EXPORT_SYMBOL(kvm_mips_guest_tlb_lookup);
EXPORT_SYMBOL(kvm_mips_host_tlb_inv);
EXPORT_SYMBOL(kvm_mips_translate_guest_kseg0_to_hpa);
EXPORT_SYMBOL(kvm_shadow_tlb_load);
EXPORT_SYMBOL(kvm_mips_dump_shadow_tlbs);
EXPORT_SYMBOL(kvm_mips_dump_guest_tlbs);
EXPORT_SYMBOL(kvm_get_inst);
EXPORT_SYMBOL(kvm_arch_vcpu_load);
EXPORT_SYMBOL(kvm_arch_vcpu_put);
arch/mips/kvm/kvm_trap_emul.c 0 → 100644
View file @ 5e0e61dd
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* KVM/MIPS: Deliver/Emulate exceptions to the guest kernel
*
* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
* Authors: Sanjay Lal <sanjayl@kymasys.com>
*/
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/vmalloc.h>
#include <linux/kvm_host.h>
#include "kvm_mips_opcode.h"
#include "kvm_mips_int.h"
static gpa_t kvm_trap_emul_gva_to_gpa_cb(gva_t gva)
{
gpa_t gpa;
uint32_t kseg = KSEGX(gva);
if ((kseg == CKSEG0) || (kseg == CKSEG1))
gpa = CPHYSADDR(gva);
else {
printk("%s: cannot find GPA for GVA: %#lx\n", __func__, gva);
kvm_mips_dump_host_tlbs();
gpa = KVM_INVALID_ADDR;
}
#ifdef DEBUG
kvm_debug("%s: gva %#lx, gpa: %#llx\n", __func__, gva, gpa);
#endif
return gpa;
}
static int kvm_trap_emul_handle_cop_unusable(struct kvm_vcpu *vcpu)
{
struct kvm_run *run = vcpu->run;
uint32_t __user *opc = (uint32_t __user *) vcpu->arch.pc;
unsigned long cause = vcpu->arch.host_cp0_cause;
enum emulation_result er = EMULATE_DONE;
int ret = RESUME_GUEST;
if (((cause & CAUSEF_CE) >> CAUSEB_CE) == 1) {
er = kvm_mips_emulate_fpu_exc(cause, opc, run, vcpu);
} else
er = kvm_mips_emulate_inst(cause, opc, run, vcpu);
switch (er) {
case EMULATE_DONE:
ret = RESUME_GUEST;
break;
case EMULATE_FAIL:
run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
ret = RESUME_HOST;
break;
case EMULATE_WAIT:
run->exit_reason = KVM_EXIT_INTR;
ret = RESUME_HOST;
break;
default:
BUG();
}
return ret;
}
static int kvm_trap_emul_handle_tlb_mod(struct kvm_vcpu *vcpu)
{
struct kvm_run *run = vcpu->run;
uint32_t __user *opc = (uint32_t __user *) vcpu->arch.pc;
unsigned long badvaddr = vcpu->arch.host_cp0_badvaddr;
unsigned long cause = vcpu->arch.host_cp0_cause;
enum emulation_result er = EMULATE_DONE;
int ret = RESUME_GUEST;
if (KVM_GUEST_KSEGX(badvaddr) < KVM_GUEST_KSEG0
|| KVM_GUEST_KSEGX(badvaddr) == KVM_GUEST_KSEG23) {
#ifdef DEBUG
kvm_debug
("USER/KSEG23 ADDR TLB MOD fault: cause %#lx, PC: %p, BadVaddr: %#lx\n",
cause, opc, badvaddr);
#endif
er = kvm_mips_handle_tlbmod(cause, opc, run, vcpu);
if (er == EMULATE_DONE)
ret = RESUME_GUEST;
else {
run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
ret = RESUME_HOST;
}
} else if (KVM_GUEST_KSEGX(badvaddr) == KVM_GUEST_KSEG0) {
/* XXXKYMA: The guest kernel does not expect to get this fault when we are not
* using HIGHMEM. Need to address this in a HIGHMEM kernel
*/
printk
("TLB MOD fault not handled, cause %#lx, PC: %p, BadVaddr: %#lx\n",
cause, opc, badvaddr);
kvm_mips_dump_host_tlbs();
kvm_arch_vcpu_dump_regs(vcpu);
run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
ret = RESUME_HOST;
} else {
printk
("Illegal TLB Mod fault address , cause %#lx, PC: %p, BadVaddr: %#lx\n",
cause, opc, badvaddr);
kvm_mips_dump_host_tlbs();
kvm_arch_vcpu_dump_regs(vcpu);
run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
ret = RESUME_HOST;
}
return ret;
}
static int kvm_trap_emul_handle_tlb_st_miss(struct kvm_vcpu *vcpu)
{
struct kvm_run *run = vcpu->run;
uint32_t __user *opc = (uint32_t __user *) vcpu->arch.pc;
unsigned long badvaddr = vcpu->arch.host_cp0_badvaddr;
unsigned long cause = vcpu->arch.host_cp0_cause;
enum emulation_result er = EMULATE_DONE;
int ret = RESUME_GUEST;
if (((badvaddr & PAGE_MASK) == KVM_GUEST_COMMPAGE_ADDR)
&& KVM_GUEST_KERNEL_MODE(vcpu)) {
if (kvm_mips_handle_commpage_tlb_fault(badvaddr, vcpu) < 0) {
run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
ret = RESUME_HOST;
}
} else if (KVM_GUEST_KSEGX(badvaddr) < KVM_GUEST_KSEG0
|| KVM_GUEST_KSEGX(badvaddr) == KVM_GUEST_KSEG23) {
#ifdef DEBUG
kvm_debug
("USER ADDR TLB LD fault: cause %#lx, PC: %p, BadVaddr: %#lx\n",
cause, opc, badvaddr);
#endif
er = kvm_mips_handle_tlbmiss(cause, opc, run, vcpu);
if (er == EMULATE_DONE)
ret = RESUME_GUEST;
else {
run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
ret = RESUME_HOST;
}
} else if (KVM_GUEST_KSEGX(badvaddr) == KVM_GUEST_KSEG0) {
/* All KSEG0 faults are handled by KVM, as the guest kernel does not
* expect to ever get them
*/
if (kvm_mips_handle_kseg0_tlb_fault
(vcpu->arch.host_cp0_badvaddr, vcpu) < 0) {
run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
ret = RESUME_HOST;
}
} else {
kvm_err
("Illegal TLB LD fault address , cause %#lx, PC: %p, BadVaddr: %#lx\n",
cause, opc, badvaddr);
kvm_mips_dump_host_tlbs();
kvm_arch_vcpu_dump_regs(vcpu);
run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
ret = RESUME_HOST;
}
return ret;
}
static int kvm_trap_emul_handle_tlb_ld_miss(struct kvm_vcpu *vcpu)
{
struct kvm_run *run = vcpu->run;
uint32_t __user *opc = (uint32_t __user *) vcpu->arch.pc;
unsigned long badvaddr = vcpu->arch.host_cp0_badvaddr;
unsigned long cause = vcpu->arch.host_cp0_cause;
enum emulation_result er = EMULATE_DONE;
int ret = RESUME_GUEST;
if (((badvaddr & PAGE_MASK) == KVM_GUEST_COMMPAGE_ADDR)
&& KVM_GUEST_KERNEL_MODE(vcpu)) {
if (kvm_mips_handle_commpage_tlb_fault(badvaddr, vcpu) < 0) {
run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
ret = RESUME_HOST;
}
} else if (KVM_GUEST_KSEGX(badvaddr) < KVM_GUEST_KSEG0
|| KVM_GUEST_KSEGX(badvaddr) == KVM_GUEST_KSEG23) {
#ifdef DEBUG
kvm_debug("USER ADDR TLB ST fault: PC: %#lx, BadVaddr: %#lx\n",
vcpu->arch.pc, badvaddr);
#endif
/* User Address (UA) fault, this could happen if
* (1) TLB entry not present/valid in both Guest and shadow host TLBs, in this
* case we pass on the fault to the guest kernel and let it handle it.
* (2) TLB entry is present in the Guest TLB but not in the shadow, in this
* case we inject the TLB from the Guest TLB into the shadow host TLB
*/
er = kvm_mips_handle_tlbmiss(cause, opc, run, vcpu);
if (er == EMULATE_DONE)
ret = RESUME_GUEST;
else {
run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
ret = RESUME_HOST;
}
} else if (KVM_GUEST_KSEGX(badvaddr) == KVM_GUEST_KSEG0) {
if (kvm_mips_handle_kseg0_tlb_fault
(vcpu->arch.host_cp0_badvaddr, vcpu) < 0) {
run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
ret = RESUME_HOST;
}
} else {
printk
("Illegal TLB ST fault address , cause %#lx, PC: %p, BadVaddr: %#lx\n",
cause, opc, badvaddr);
kvm_mips_dump_host_tlbs();
kvm_arch_vcpu_dump_regs(vcpu);
run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
ret = RESUME_HOST;
}
return ret;
}
static int kvm_trap_emul_handle_addr_err_st(struct kvm_vcpu *vcpu)
{
struct kvm_run *run = vcpu->run;
uint32_t __user *opc = (uint32_t __user *) vcpu->arch.pc;
unsigned long badvaddr = vcpu->arch.host_cp0_badvaddr;
unsigned long cause = vcpu->arch.host_cp0_cause;
enum emulation_result er = EMULATE_DONE;
int ret = RESUME_GUEST;
if (KVM_GUEST_KERNEL_MODE(vcpu)
&& (KSEGX(badvaddr) == CKSEG0 || KSEGX(badvaddr) == CKSEG1)) {
#ifdef DEBUG
kvm_debug("Emulate Store to MMIO space\n");
#endif
er = kvm_mips_emulate_inst(cause, opc, run, vcpu);
if (er == EMULATE_FAIL) {
printk("Emulate Store to MMIO space failed\n");
run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
ret = RESUME_HOST;
} else {
run->exit_reason = KVM_EXIT_MMIO;
ret = RESUME_HOST;
}
} else {
printk
("Address Error (STORE): cause %#lx, PC: %p, BadVaddr: %#lx\n",
cause, opc, badvaddr);
run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
ret = RESUME_HOST;
}
return ret;
}
static int kvm_trap_emul_handle_addr_err_ld(struct kvm_vcpu *vcpu)
{
struct kvm_run *run = vcpu->run;
uint32_t __user *opc = (uint32_t __user *) vcpu->arch.pc;
unsigned long badvaddr = vcpu->arch.host_cp0_badvaddr;
unsigned long cause = vcpu->arch.host_cp0_cause;
enum emulation_result er = EMULATE_DONE;
int ret = RESUME_GUEST;
if (KSEGX(badvaddr) == CKSEG0 || KSEGX(badvaddr) == CKSEG1) {
#ifdef DEBUG
kvm_debug("Emulate Load from MMIO space @ %#lx\n", badvaddr);
#endif
er = kvm_mips_emulate_inst(cause, opc, run, vcpu);
if (er == EMULATE_FAIL) {
printk("Emulate Load from MMIO space failed\n");
run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
ret = RESUME_HOST;
} else {
run->exit_reason = KVM_EXIT_MMIO;
ret = RESUME_HOST;
}
} else {
printk
("Address Error (LOAD): cause %#lx, PC: %p, BadVaddr: %#lx\n",
cause, opc, badvaddr);
run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
ret = RESUME_HOST;
er = EMULATE_FAIL;
}
return ret;
}
static int kvm_trap_emul_handle_syscall(struct kvm_vcpu *vcpu)
{
struct kvm_run *run = vcpu->run;
uint32_t __user *opc = (uint32_t __user *) vcpu->arch.pc;
unsigned long cause = vcpu->arch.host_cp0_cause;
enum emulation_result er = EMULATE_DONE;
int ret = RESUME_GUEST;
er = kvm_mips_emulate_syscall(cause, opc, run, vcpu);
if (er == EMULATE_DONE)
ret = RESUME_GUEST;
else {
run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
ret = RESUME_HOST;
}
return ret;
}
static int kvm_trap_emul_handle_res_inst(struct kvm_vcpu *vcpu)
{
struct kvm_run *run = vcpu->run;
uint32_t __user *opc = (uint32_t __user *) vcpu->arch.pc;
unsigned long cause = vcpu->arch.host_cp0_cause;
enum emulation_result er = EMULATE_DONE;
int ret = RESUME_GUEST;
er = kvm_mips_handle_ri(cause, opc, run, vcpu);
if (er == EMULATE_DONE)
ret = RESUME_GUEST;
else {
run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
ret = RESUME_HOST;
}
return ret;
}
static int kvm_trap_emul_handle_break(struct kvm_vcpu *vcpu)
{
struct kvm_run *run = vcpu->run;
uint32_t __user *opc = (uint32_t __user *) vcpu->arch.pc;
unsigned long cause = vcpu->arch.host_cp0_cause;
enum emulation_result er = EMULATE_DONE;
int ret = RESUME_GUEST;
er = kvm_mips_emulate_bp_exc(cause, opc, run, vcpu);
if (er == EMULATE_DONE)
ret = RESUME_GUEST;
else {
run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
ret = RESUME_HOST;
}
return ret;
}
static int
kvm_trap_emul_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
kvm_write_c0_guest_index(cop0, regs->cp0reg[MIPS_CP0_TLB_INDEX][0]);
kvm_write_c0_guest_context(cop0, regs->cp0reg[MIPS_CP0_TLB_CONTEXT][0]);
kvm_write_c0_guest_badvaddr(cop0, regs->cp0reg[MIPS_CP0_BAD_VADDR][0]);
kvm_write_c0_guest_entryhi(cop0, regs->cp0reg[MIPS_CP0_TLB_HI][0]);
kvm_write_c0_guest_epc(cop0, regs->cp0reg[MIPS_CP0_EXC_PC][0]);
kvm_write_c0_guest_status(cop0, regs->cp0reg[MIPS_CP0_STATUS][0]);
kvm_write_c0_guest_cause(cop0, regs->cp0reg[MIPS_CP0_CAUSE][0]);
kvm_write_c0_guest_pagemask(cop0,
regs->cp0reg[MIPS_CP0_TLB_PG_MASK][0]);
kvm_write_c0_guest_wired(cop0, regs->cp0reg[MIPS_CP0_TLB_WIRED][0]);
kvm_write_c0_guest_errorepc(cop0, regs->cp0reg[MIPS_CP0_ERROR_PC][0]);
return 0;
}
static int
kvm_trap_emul_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
regs->cp0reg[MIPS_CP0_TLB_INDEX][0] = kvm_read_c0_guest_index(cop0);
regs->cp0reg[MIPS_CP0_TLB_CONTEXT][0] = kvm_read_c0_guest_context(cop0);
regs->cp0reg[MIPS_CP0_BAD_VADDR][0] = kvm_read_c0_guest_badvaddr(cop0);
regs->cp0reg[MIPS_CP0_TLB_HI][0] = kvm_read_c0_guest_entryhi(cop0);
regs->cp0reg[MIPS_CP0_EXC_PC][0] = kvm_read_c0_guest_epc(cop0);
regs->cp0reg[MIPS_CP0_STATUS][0] = kvm_read_c0_guest_status(cop0);
regs->cp0reg[MIPS_CP0_CAUSE][0] = kvm_read_c0_guest_cause(cop0);
regs->cp0reg[MIPS_CP0_TLB_PG_MASK][0] =
kvm_read_c0_guest_pagemask(cop0);
regs->cp0reg[MIPS_CP0_TLB_WIRED][0] = kvm_read_c0_guest_wired(cop0);
regs->cp0reg[MIPS_CP0_ERROR_PC][0] = kvm_read_c0_guest_errorepc(cop0);
regs->cp0reg[MIPS_CP0_CONFIG][0] = kvm_read_c0_guest_config(cop0);
regs->cp0reg[MIPS_CP0_CONFIG][1] = kvm_read_c0_guest_config1(cop0);
regs->cp0reg[MIPS_CP0_CONFIG][2] = kvm_read_c0_guest_config2(cop0);
regs->cp0reg[MIPS_CP0_CONFIG][3] = kvm_read_c0_guest_config3(cop0);
regs->cp0reg[MIPS_CP0_CONFIG][7] = kvm_read_c0_guest_config7(cop0);
return 0;
}
static int kvm_trap_emul_vm_init(struct kvm *kvm)
{
return 0;
}
static int kvm_trap_emul_vcpu_init(struct kvm_vcpu *vcpu)
{
return 0;
}
static int kvm_trap_emul_vcpu_setup(struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
uint32_t config1;
int vcpu_id = vcpu->vcpu_id;
/* Arch specific stuff, set up config registers properly so that the
* guest will come up as expected, for now we simulate a
* MIPS 24kc
*/
kvm_write_c0_guest_prid(cop0, 0x00019300);
kvm_write_c0_guest_config(cop0,
MIPS_CONFIG0 | (0x1 << CP0C0_AR) |
(MMU_TYPE_R4000 << CP0C0_MT));
/* Read the cache characteristics from the host Config1 Register */
config1 = (read_c0_config1() & ~0x7f);
/* Set up MMU size */
config1 &= ~(0x3f << 25);
config1 |= ((KVM_MIPS_GUEST_TLB_SIZE - 1) << 25);
/* We unset some bits that we aren't emulating */
config1 &=
~((1 << CP0C1_C2) | (1 << CP0C1_MD) | (1 << CP0C1_PC) |
(1 << CP0C1_WR) | (1 << CP0C1_CA));
kvm_write_c0_guest_config1(cop0, config1);
kvm_write_c0_guest_config2(cop0, MIPS_CONFIG2);
/* MIPS_CONFIG2 | (read_c0_config2() & 0xfff) */
kvm_write_c0_guest_config3(cop0,
MIPS_CONFIG3 | (0 << CP0C3_VInt) | (1 <<
CP0C3_ULRI));
/* Set Wait IE/IXMT Ignore in Config7, IAR, AR */
kvm_write_c0_guest_config7(cop0, (MIPS_CONF7_WII) | (1 << 10));
/* Setup IntCtl defaults, compatibilty mode for timer interrupts (HW5) */
kvm_write_c0_guest_intctl(cop0, 0xFC000000);
/* Put in vcpu id as CPUNum into Ebase Reg to handle SMP Guests */
kvm_write_c0_guest_ebase(cop0, KVM_GUEST_KSEG0 | (vcpu_id & 0xFF));
return 0;
}
static struct kvm_mips_callbacks kvm_trap_emul_callbacks = {
/* exit handlers */
.handle_cop_unusable = kvm_trap_emul_handle_cop_unusable,
.handle_tlb_mod = kvm_trap_emul_handle_tlb_mod,
.handle_tlb_st_miss = kvm_trap_emul_handle_tlb_st_miss,
.handle_tlb_ld_miss = kvm_trap_emul_handle_tlb_ld_miss,
.handle_addr_err_st = kvm_trap_emul_handle_addr_err_st,
.handle_addr_err_ld = kvm_trap_emul_handle_addr_err_ld,
.handle_syscall = kvm_trap_emul_handle_syscall,
.handle_res_inst = kvm_trap_emul_handle_res_inst,
.handle_break = kvm_trap_emul_handle_break,
.vm_init = kvm_trap_emul_vm_init,
.vcpu_init = kvm_trap_emul_vcpu_init,
.vcpu_setup = kvm_trap_emul_vcpu_setup,
.gva_to_gpa = kvm_trap_emul_gva_to_gpa_cb,
.queue_timer_int = kvm_mips_queue_timer_int_cb,
.dequeue_timer_int = kvm_mips_dequeue_timer_int_cb,
.queue_io_int = kvm_mips_queue_io_int_cb,
.dequeue_io_int = kvm_mips_dequeue_io_int_cb,
.irq_deliver = kvm_mips_irq_deliver_cb,
.irq_clear = kvm_mips_irq_clear_cb,
.vcpu_ioctl_get_regs = kvm_trap_emul_ioctl_get_regs,
.vcpu_ioctl_set_regs = kvm_trap_emul_ioctl_set_regs,
};
int kvm_mips_emulation_init(struct kvm_mips_callbacks **install_callbacks)
{
*install_callbacks = &kvm_trap_emul_callbacks;
return 0;
}
arch/mips/kvm/trace.h 0 → 100644
View file @ 5e0e61dd
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
* Authors: Sanjay Lal <sanjayl@kymasys.com>
*/
#if !defined(_TRACE_KVM_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_KVM_H
#include <linux/tracepoint.h>
#undef TRACE_SYSTEM
#define TRACE_SYSTEM kvm
#define TRACE_INCLUDE_PATH .
#define TRACE_INCLUDE_FILE trace
/*
* Tracepoints for VM eists
*/
extern char *kvm_mips_exit_types_str[MAX_KVM_MIPS_EXIT_TYPES];
TRACE_EVENT(kvm_exit,
TP_PROTO(struct kvm_vcpu *vcpu, unsigned int reason),
TP_ARGS(vcpu, reason),
TP_STRUCT__entry(
__field(struct kvm_vcpu *, vcpu)
__field(unsigned int, reason)
),
TP_fast_assign(
__entry->vcpu = vcpu;
__entry->reason = reason;
),
TP_printk("[%s]PC: 0x%08lx",
kvm_mips_exit_types_str[__entry->reason],
__entry->vcpu->arch.pc)
);
#endif /* _TRACE_KVM_H */
/* This part must be outside protection */
#include <trace/define_trace.h>
arch/mips/mm/c-r4k.c
View file @ 5e0e61dd
......@@ -136,7 +136,8 @@ static void __cpuinit r4k_blast_dcache_page_indexed_setup(void)
r4k_blast_dcache_page_indexed = blast_dcache64_page_indexed;
}
static void (* r4k_blast_dcache)(void);
void (* r4k_blast_dcache)(void);
EXPORT_SYMBOL(r4k_blast_dcache);
static void __cpuinit r4k_blast_dcache_setup(void)
{
......@@ -264,7 +265,8 @@ static void __cpuinit r4k_blast_icache_page_indexed_setup(void)
r4k_blast_icache_page_indexed = blast_icache64_page_indexed;
}
static void (* r4k_blast_icache)(void);
void (* r4k_blast_icache)(void);
EXPORT_SYMBOL(r4k_blast_icache);
static void __cpuinit r4k_blast_icache_setup(void)
{
......
arch/mips/mm/cache.c
View file @ 5e0e61dd
......@@ -48,6 +48,7 @@ void (*flush_icache_all)(void);
EXPORT_SYMBOL_GPL(local_flush_data_cache_page);
EXPORT_SYMBOL(flush_data_cache_page);
EXPORT_SYMBOL(flush_icache_all);
#ifdef CONFIG_DMA_NONCOHERENT
......
arch/mips/mm/tlb-r4k.c
View file @ 5e0e61dd
......@@ -13,6 +13,7 @@
#include <linux/smp.h>
#include <linux/mm.h>
#include <linux/hugetlb.h>
#include <linux/module.h>
#include <asm/cpu.h>
#include <asm/bootinfo.h>
......@@ -94,6 +95,7 @@ void local_flush_tlb_all(void)
FLUSH_ITLB;
EXIT_CRITICAL(flags);
}
EXPORT_SYMBOL(local_flush_tlb_all);
/* All entries common to a mm share an asid. To effectively flush
these entries, we just bump the asid. */
......
arch/mips/mti-malta/Platform
View file @ 5e0e61dd
......@@ -3,5 +3,9 @@
#
platform-$(CONFIG_MIPS_MALTA) += mti-malta/
cflags-$(CONFIG_MIPS_MALTA) += -I$(srctree)/arch/mips/include/asm/mach-malta
load-$(CONFIG_MIPS_MALTA) += 0xffffffff80100000
ifdef CONFIG_KVM_GUEST
load-$(CONFIG_MIPS_MALTA) += 0x0000000040100000
else
load-$(CONFIG_MIPS_MALTA) += 0xffffffff80100000
endif
all-$(CONFIG_MIPS_MALTA) := $(COMPRESSION_FNAME).bin
arch/mips/mti-malta/malta-time.c
View file @ 5e0e61dd
......@@ -76,6 +76,21 @@ static void __init estimate_frequencies(void)
unsigned int count, start;
unsigned int giccount = 0, gicstart = 0;
#if defined (CONFIG_KVM_GUEST) && defined (CONFIG_KVM_HOST_FREQ)
unsigned int prid = read_c0_prid() & 0xffff00;
/*
* XXXKYMA: hardwire the CPU frequency to Host Freq/4
*/
count = (CONFIG_KVM_HOST_FREQ * 1000000) >> 3;
if ((prid != (PRID_COMP_MIPS | PRID_IMP_20KC)) &&
(prid != (PRID_COMP_MIPS | PRID_IMP_25KF)))
count *= 2;
mips_hpt_frequency = count;
return;
#endif
local_irq_save(flags);
/* Start counter exactly on falling edge of update flag. */
......
arch/mips/sgi-ip27/ip27-klnuma.c
View file @ 5e0e61dd
......@@ -114,7 +114,7 @@ void __init replicate_kernel_text()
* data structures on the first couple of pages of the first slot of each
* node. If this is the case, getfirstfree(node) > getslotstart(node, 0).
*/
pfn_t node_getfirstfree(cnodeid_t cnode)
unsigned long node_getfirstfree(cnodeid_t cnode)
{
unsigned long loadbase = REP_BASE;
nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode);
......
arch/mips/sgi-ip27/ip27-memory.c
View file @ 5e0e61dd
......@@ -255,14 +255,14 @@ static void __init dump_topology(void)
}
}
static pfn_t __init slot_getbasepfn(cnodeid_t cnode, int slot)
static unsigned long __init slot_getbasepfn(cnodeid_t cnode, int slot)
{
nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode);
return ((pfn_t)nasid << PFN_NASIDSHFT) | (slot << SLOT_PFNSHIFT);
return ((unsigned long)nasid << PFN_NASIDSHFT) | (slot << SLOT_PFNSHIFT);
}
static pfn_t __init slot_psize_compute(cnodeid_t node, int slot)
static unsigned long __init slot_psize_compute(cnodeid_t node, int slot)
{
nasid_t nasid;
lboard_t *brd;
......@@ -353,7 +353,7 @@ static void __init mlreset(void)
static void __init szmem(void)
{
pfn_t slot_psize, slot0sz = 0, nodebytes; /* Hack to detect problem configs */
unsigned long slot_psize, slot0sz = 0, nodebytes; /* Hack to detect problem configs */
int slot;
cnodeid_t node;
......@@ -390,10 +390,10 @@ static void __init szmem(void)
static void __init node_mem_init(cnodeid_t node)
{
pfn_t slot_firstpfn = slot_getbasepfn(node, 0);
pfn_t slot_freepfn = node_getfirstfree(node);
unsigned long slot_firstpfn = slot_getbasepfn(node, 0);
unsigned long slot_freepfn = node_getfirstfree(node);
unsigned long bootmap_size;
pfn_t start_pfn, end_pfn;
unsigned long start_pfn, end_pfn;
get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
......@@ -467,7 +467,7 @@ void __init paging_init(void)
pagetable_init();
for_each_online_node(node) {
pfn_t start_pfn, end_pfn;
unsigned long start_pfn, end_pfn;
get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
......
virt/kvm/kvm_main.c
View file @ 5e0e61dd
......@@ -1981,7 +1981,7 @@ static long kvm_vcpu_ioctl(struct file *filp,
if (vcpu->kvm->mm != current->mm)
return -EIO;
#if defined(CONFIG_S390) || defined(CONFIG_PPC)
#if defined(CONFIG_S390) || defined(CONFIG_PPC) || defined(CONFIG_MIPS)
/*
* Special cases: vcpu ioctls that are asynchronous to vcpu execution,
* so vcpu_load() would break it.
......
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