- 22 Apr, 2014 31 commits
-
-
Heiko Carstens authored
Convert handle_store_cpu_address() to new guest access functions. Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by:
Thomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by:
Christian Borntraeger <borntraeger@de.ibm.com>
-
Heiko Carstens authored
Convert handle_store_prefix() to new guest access functions. Signed-off-by:
-
Heiko Carstens authored
Convert handle_set_clock() to new guest access functions. Signed-off-by:
-
Heiko Carstens authored
Convert __sigp_set_prefix() and handle_set_prefix() to new guest access functions. Signed-off-by:
-
Heiko Carstens authored
Convert kvm_s390_store_status_unloaded() to new guest access functions. Signed-off-by:
-
Heiko Carstens authored
Convert handle_prog() to new guest access functions. Also make the code a bit more readable and look at the return code of write_guest_lc() which was missing before. Signed-off-by:
-
Heiko Carstens authored
Convert pfault code to new guest access functions. Signed-off-by:
Dominik Dingel <dingel@linux.vnet.ibm.com> Signed-off-by:
-
Heiko Carstens authored
Convert handle_stfl() to new guest access functions. Signed-off-by:
-
Jens Freimann authored
Convert local irqs in __do_deliver_interrupt() to new guest access functions. Signed-off-by:
Jens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by:
-
Heiko Carstens authored
Convert __do_deliver_interrupt() to new guest access functions. Signed-off-by:
-
Heiko Carstens authored
Signed-off-by:
-
Heiko Carstens authored
Check if siif is available before setting. Signed-off-by:
-
Heiko Carstens authored
The new guest memory access function write_guest() and read_guest() can be used to access guest memory in an architecture compliant way. These functions will look at the vcpu's PSW and select the correct address space for memory access and also perform correct address wrap around. In case DAT is turned on, page tables will be walked otherwise access will happen to real or absolute memory. Any access exception will be recognized and exception data will be stored in the vcpu's kvm_vcpu_arch.pgm member. Subsequently an exception can be injected if necessary. Missing are: - key protection checks - access register mode support - program event recording support This patch also adds write_guest_real(), read_guest_real(), write_guest_absolute() and read_guest_absolute() guest functions which can be used to access real and absolute storage. These functions currently do not perform any access checks, since there is no use case (yet?). Signed-off-by:
-
Heiko Carstens authored
put_guest_lc, read_guest_lc and write_guest_lc are guest access functions which shall only be used to access the lowcore of a vcpu. These functions should be used for e.g. interrupt handlers where no guest memory access protection facilities, like key or low address protection, are applicable. At a later point guest vcpu lowcore access should happen via pinned prefix pages, so that these pages can be accessed directly via the kernel mapping. All of these *_lc functions can be removed then. Signed-off-by:
Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by:
-
Heiko Carstens authored
Add a 'struct kvm_s390_pgm_info pgm' member to kvm_vcpu_arch. This structure will be used if during instruction emulation in the context of a vcpu exception data needs to be stored somewhere. Also add a helper function kvm_s390_inject_prog_cond() which can inject vcpu's last exception if needed. Signed-off-by:
-
Heiko Carstens authored
Add kvm_s390_logical_to_effective() helper which converts a guest vcpu's logical storage address to a guest vcpu effective address by applying the rules of the vcpu's addressing mode defined by PSW bits 31 and 32 (extendended and basic addressing mode). Depending on the vcpu's addressing mode the upper 40 bits (24 bit addressing mode), 33 bits (31 bit addressing mode) or no bits (64 bit addressing mode) will be zeroed and the remaining bits will be returned. Signed-off-by:
-
Heiko Carstens authored
Add 'union ctlreg0_bits' to easily allow setting and testing bits of control register 0 bits. This patch only adds the bits needed for the new guest access functions. Other bits and control registers can be added when needed. Signed-off-by:
-
Heiko Carstens authored
Introduce a 'struct psw' which makes it easier to decode and test if certain bits in a psw are set or are not set. In addition also add a 'psw_bits()' helper define which allows to directly modify and test a psw_t structure. E.g. psw_t psw; psw_bits(psw).t = 1; /* set dat bit */ Signed-off-by:
-
Heiko Carstens authored
Make test_vfacility() available for other files. This is needed for the new guest access functions, which test if certain facilities are available for a guest. Signed-off-by:
-
Heiko Carstens authored
It's quite common (in the s390 guest access code) to test if a guest physical address points to a valid guest memory area or not. So add a simple helper function in common code, since this might be of interest for other architectures as well. Signed-off-by:
-
Jens Freimann authored
Add a new data structure and function that allows to inject all kinds of interrupt as defined in the PoP Signed-off-by:
-
Dominik Dingel authored
To enable CMMA and to reset its state we use the vm kvm_device ioctls, encapsulating attributes within the KVM_S390_VM_MEM_CTRL group. Signed-off-by:
-
Dominik Dingel authored
When userspace reset the guest without notifying kvm, the CMMA state of the pages might be unused, resulting in guest data corruption. To avoid this, CMMA must be enabled only if userspace understands the implications. CMMA must be enabled before vCPU creation. It can't be switched off once enabled. All subsequently created vCPUs will be enabled for CMMA according to the CMMA state of the VM. Signed-off-by:
-
Dominik Dingel authored
We sometimes need to get/set attributes specific to a virtual machine and so need something else than ONE_REG. Let's copy the KVM_DEVICE approach, and define the respective ioctls for the vm file descriptor. Signed-off-by:
Alexander Graf <agraf@suse.de> Signed-off-by:
-
Jason J. Herne authored
Replace the kvm_s390_sync_dirty_log() stub with code to construct the KVM dirty_bitmap from S390 memory change bits. Also add code to properly clear the dirty_bitmap size when clearing the bitmap. Signed-off-by:
Jason J. Herne <jjherne@us.ibm.com> CC: Dominik Dingel <dingel@linux.vnet.ibm.com> [Dominik Dingel: use gmap_test_and_clear_dirty, locking fixes] Signed-off-by:
-
Dominik Dingel authored
For live migration kvm needs to test and clear the dirty bit of guest pages. That for is ptep_test_and_clear_user_dirty, to be sure we are not racing with other code, we protect the pte. This needs to be done within the architecture memory management code. Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by:
-
Martin Schwidefsky authored
Switch the user dirty bit detection used for migration from the hardware provided host change-bit in the pgste to a fault based detection method. This reduced the dependency of the host from the storage key to a point where it becomes possible to enable the RCP bypass for KVM guests. The fault based dirty detection will only indicate changes caused by accesses via the guest address space. The hardware based method can detect all changes, even those caused by I/O or accesses via the kernel page table. The KVM/qemu code needs to take this into account. Signed-off-by:
-
Dominik Dingel authored
The first invocation of storage key operations on a given cpu will be intercepted. On these intercepts we will enable storage keys for the guest and remove the previously added intercepts. Signed-off-by:
-
Dominik Dingel authored
Introduce a new function s390_enable_skey(), which enables storage key handling via setting the use_skey flag in the mmu context. This function is only useful within the context of kvm. Note that enabling storage keys will cause a one-time hickup when walking the page table; however, it saves us special effort for cases like clear reset while making it possible for us to be architecture conform. s390_enable_skey() takes the page table lock to prevent reseting storage keys triggered from multiple vcpus. Signed-off-by:
-
Dominik Dingel authored
page_table_reset_pgste() already does a complete page table walk to reset the pgste. Enhance it to initialize the storage keys to PAGE_DEFAULT_KEY if requested by the caller. This will be used for lazy storage key handling. Also provide an empty stub for !CONFIG_PGSTE Lets adopt the current code (diag 308) to not clear the keys. Signed-off-by:
-
Dominik Dingel authored
For lazy storage key handling, we need a mechanism to track if the process ever issued a storage key operation. This patch adds the basic infrastructure for making the storage key handling optional, but still leaves it enabled for now by default. Signed-off-by:
-
- 16 Apr, 2014 4 commits
-
-
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linuxLinus Torvalds authored
Pull s390 patches from Martin Schwidefsky: "An update to the oops output with additional information about the crash. The renameat2 system call is enabled. Two patches in regard to the PTR_ERR_OR_ZERO cleanup. And a bunch of bug fixes" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/sclp_cmd: replace PTR_RET with PTR_ERR_OR_ZERO s390/sclp: replace PTR_RET with PTR_ERR_OR_ZERO s390/sclp_vt220: Fix kernel panic due to early terminal input s390/compat: fix typo s390/uaccess: fix possible register corruption in strnlen_user_srst() s390: add 31 bit warning message s390: wire up sys_renameat2 s390: show_registers() should not map user space addresses to kernel symbols s390/mm: print control registers and page table walk on crash s390/smp: fix smp_stop_cpu() for !CONFIG_SMP s390: fix control register update
-
git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linuxLinus Torvalds authored
Pull itanium erratum fix from Tony Luck: "Small workaround for a rare, but annoying, erratum #237" * tag 'please-pull-ia64-erratum' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux: [IA64] Change default PSR.ac from '1' to '0' (Fix erratum #237)
-
Tony Luck authored
April 2014 Itanium processor specification update: http://www.intel.com/content/www/us/en/processors/itanium/itanium-specification-update.html describes this erratum: ========================================================================= 237. Under a complex set of conditions, store to load forwarding for a sub 8-byte load may complete incorrectly Problem: A load instruction may complete incorrectly when a code sequence using 4-byte or smaller load and store operations to the same address is executed in combination with specific timing of all the following concurrent conditions: store to load forwarding, alignment checking enabled, a mis-predicted branch, and complex cache utilization activity. Implication: The affected sub 8-byte instruction may complete incorrectly resulting in unpredictable system behavior. There is an extremely low probability of exposure due to the significant number of complex microarchitectural concurrent conditions required to encounter the erratum. Workaround: Set PSR.ac = 0 to completely avoid the erratum. Disabling Hyper-Threading will significantly reduce exposure to the conditions that contribute to encountering the erratum. Status: See the Summary Table of Changes for the affected steppings. ========================================================================= [Table of changes essentially lists all models from McKinley to Tukwila] The PSR.ac bit controls whether the processor will always generate an unaligned reference trap (0x5a00) for a misaligned data access (when PSR.ac=1) or if it will let the access succeed when running on a cpu that implements logic to handle some unaligned accesses. Way back in 2008 in commit b704882e [IA64] Rationalize kernel mode alignment checking we made the decision to always enable strict checking. We were already doing so in trap/interrupt context because the common preamble code set this bit - but the rest of supervisor code (and by inheritance user code) ran with PSR.ac=0. We now reverse that decision and set PSR.ac=0 everywhere in the kernel (also inherited by user processes). This will avoid the erratum using the method described in the Itanium specification update. Net effect for users is that the processor will handle unaligned access when it can (typically with a tiny performance bubble in the pipeline ... but much less invasive than taking a trap and having the OS perform the access). Signed-off-by:
Tony Luck <tony.luck@intel.com>
-
git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds authored
Pull networking fixes from David Miller: 1) Fix BPF filter validation of netlink attribute accesses, from Mathias Kruase. 2) Netfilter conntrack generation seqcount not initialized properly, from Andrey Vagin. 3) Fix comparison mask computation on big-endian in nft_cmp_fast(), from Patrick McHardy. 4) Properly limit MTU over ipv6, from Eric Dumazet. 5) Fix seccomp system call argument population on 32-bit, from Daniel Borkmann. 6) skb_network_protocol() should not use hard-coded ETH_HLEN, instead skb->mac_len needs to be used. From Vlad Yasevich. 7) We have several cases of using socket based communications to implement a tunnel. For example, some tunnels are encapsulations over UDP so we use an internal kernel UDP socket to do the transmits. These tunnels should behave just like other software devices and pass the packets on down to the next layer. Most importantly we want the top-level socket (eg TCP) that created the traffic to be charged for the SKB memory. However, once you get into the IP output path, we have code that assumed that whatever was attached to skb->sk is an IP socket. To keep the top-level socket being charged for the SKB memory, whilst satisfying the needs of the IP output path, we now pass in an explicit 'sk' argument. From Eric Dumazet. 8) ping_init_sock() leaks group info, from Xiaoming Wang. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (33 commits) cxgb4: use the correct max size for firmware flash qlcnic: Fix MSI-X initialization code ip6_gre: don't allow to remove the fb_tunnel_dev ipv4: add a sock pointer to dst->output() path. ipv4: add a sock pointer to ip_queue_xmit() driver/net: cosa driver uses udelay incorrectly at86rf230: fix __at86rf230_read_subreg function at86rf230: remove check if AVDD settled net: cadence: Add architecture dependencies net: Start with correct mac_len in skb_network_protocol Revert "net: sctp: Fix a_rwnd/rwnd management to reflect real state of the receiver's buffer" cxgb4: Save the correct mac addr for hw-loopback connections in the L2T net: filter: seccomp: fix wrong decoding of BPF_S_ANC_SECCOMP_LD_W seccomp: fix populating a0-a5 syscall args in 32-bit x86 BPF qlcnic: Do not disable SR-IOV when VFs are assigned to VMs qlcnic: Fix QLogic application/driver interface for virtual NIC configuration qlcnic: Fix PVID configuration on eSwitch port. qlcnic: Fix max ring count calculation qlcnic: Fix to send INIT_NIC_FUNC as first mailbox. qlcnic: Fix panic due to uninitialzed delayed_work struct in use. ...
-
- 15 Apr, 2014 5 commits
-
-
Steve Wise authored
The wrong max fw size was being used and causing false "too big" errors running ethtool -f. Signed-off-by:
Steve Wise <swise@opengridcomputing.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
-
Alexander Gordeev authored
Function qlcnic_setup_tss_rss_intr() might enter endless loop in case pci_enable_msix() contiguously returns a positive number of MSI-Xs that could have been allocated. Besides, the function contains 'err = -EIO;' assignment that never could be reached. This update fixes the aforementioned issues. Cc: Shahed Shaikh <shahed.shaikh@qlogic.com> Cc: Dept-HSGLinuxNICDev@qlogic.com Cc: netdev@vger.kernel.org Cc: linux-pci@vger.kernel.org Signed-off-by:
Alexander Gordeev <agordeev@redhat.com> Acked-by:
Shahed Shaikh <shahed.shaikh@qlogic.com> Signed-off-by:
-
Nicolas Dichtel authored
It's possible to remove the FB tunnel with the command 'ip link del ip6gre0' but this is unsafe, the module always supposes that this device exists. For example, ip6gre_tunnel_lookup() may use it unconditionally. Let's add a rtnl handler for dellink, which will never remove the FB tunnel (we let ip6gre_destroy_tunnels() do the job). Introduced by commit c12b395a ("gre: Support GRE over IPv6"). CC: Dmitry Kozlov <xeb@mail.ru> Signed-off-by:
Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by:
-
Eric Dumazet authored
In the dst->output() path for ipv4, the code assumes the skb it has to transmit is attached to an inet socket, specifically via ip_mc_output() : The sk_mc_loop() test triggers a WARN_ON() when the provider of the packet is an AF_PACKET socket. The dst->output() method gets an additional 'struct sock *sk' parameter. This needs a cascade of changes so that this parameter can be propagated from vxlan to final consumer. Fixes: 8f646c92 ("vxlan: keep original skb ownership") Reported-by:
lucien xin <lucien.xin@gmail.com> Signed-off-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
-
Eric Dumazet authored
ip_queue_xmit() assumes the skb it has to transmit is attached to an inet socket. Commit 31c70d59 ("l2tp: keep original skb ownership") changed l2tp to not change skb ownership and thus broke this assumption. One fix is to add a new 'struct sock *sk' parameter to ip_queue_xmit(), so that we do not assume skb->sk points to the socket used by l2tp tunnel. Fixes: 31c70d59 ("l2tp: keep original skb ownership") Reported-by:
Zhan Jianyu <nasa4836@gmail.com> Tested-by:
-
