1. 02 Oct, 2014 8 commits
  2. 01 Oct, 2014 1 commit
  3. 30 Sep, 2014 25 commits
  4. 25 Sep, 2014 6 commits
    • Joe Perches's avatar
      powerpc: pci-ioda: Use a single function to emit logging messages · 6d31c2fa
      Joe Perches authored
      No need for 3 functions when a single one will do.
      
      Modify the function declaring macros to call the single function.
      
      Reduces object code size a little:
      
      $ size arch/powerpc/platforms/powernv/pci-ioda.o*
         text	   data	    bss	    dec	    hex	filename
        22303	   1073	   6680	  30056	   7568	arch/powerpc/platforms/powernv/pci-ioda.o.new
        22840	   1121	   6776	  30737	   7811	arch/powerpc/platforms/powernv/pci-ioda.o.old
      Signed-off-by: default avatarJoe Perches <joe@perches.com>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      6d31c2fa
    • Joe Perches's avatar
      powerpc: pci-ioda: Remove unnecessary return value from printk · 45eb4724
      Joe Perches authored
      The return value is unnecessary and unused, so make the functions
      void instead of int.
      Signed-off-by: default avatarJoe Perches <joe@perches.com>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      45eb4724
    • Wei Yang's avatar
      powerpc/eeh: Fix kernel crash when passing through VF · 2a58222f
      Wei Yang authored
      When doing vfio passthrough a VF, the kernel will crash with following
      message:
      
      [  442.656459] Unable to handle kernel paging request for data at address 0x00000060
      [  442.656593] Faulting instruction address: 0xc000000000038b88
      [  442.656706] Oops: Kernel access of bad area, sig: 11 [#1]
      [  442.656798] SMP NR_CPUS=1024 NUMA PowerNV
      [  442.656890] Modules linked in: vfio_pci mlx4_core nf_conntrack_netbios_ns nf_conntrack_broadcast ipt_MASQUERADE ip6t_REJECT xt_conntrack bnep bluetooth rfkill ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw tg3 nfsd be2net nfs_acl ses lockd ptp enclosure pps_core kvm_hv kvm_pr shpchp binfmt_misc kvm sunrpc uinput lpfc scsi_transport_fc ipr scsi_tgt [last unloaded: mlx4_core]
      [  442.658152] CPU: 40 PID: 14948 Comm: qemu-system-ppc Not tainted 3.10.42yw-pkvm+ #37
      [  442.658219] task: c000000f7e2a9a00 ti: c000000f6dc3c000 task.ti: c000000f6dc3c000
      [  442.658287] NIP: c000000000038b88 LR: c0000000004435a8 CTR: c000000000455bc0
      [  442.658352] REGS: c000000f6dc3f580 TRAP: 0300   Not tainted  (3.10.42yw-pkvm+)
      [  442.658419] MSR: 9000000000009032 <SF,HV,EE,ME,IR,DR,RI>  CR: 28004882  XER: 20000000
      [  442.658577] CFAR: c00000000000908c DAR: 0000000000000060 DSISR: 40000000 SOFTE: 1
      GPR00: c0000000004435a8 c000000f6dc3f800 c0000000012b1c10 c00000000da24000
      GPR04: 0000000000000003 0000000000001004 00000000000015b3 000000000000ffff
      GPR08: c00000000127f5d8 0000000000000000 000000000000ffff 0000000000000000
      GPR12: c000000000068078 c00000000fdd6800 000001003c320c80 000001003c3607f0
      GPR16: 0000000000000001 00000000105480c8 000000001055aaa8 000001003c31ab18
      GPR20: 000001003c10fb40 000001003c360ae8 000000001063bcf0 000000001063bdb0
      GPR24: 000001003c15ed70 0000000010548f40 c000001fe5514c88 c000001fe5514cb0
      GPR28: c00000000da24000 0000000000000000 c00000000da24000 0000000000000003
      [  442.659471] NIP [c000000000038b88] .pcibios_set_pcie_reset_state+0x28/0x130
      [  442.659530] LR [c0000000004435a8] .pci_set_pcie_reset_state+0x28/0x40
      [  442.659585] Call Trace:
      [  442.659610] [c000000f6dc3f800] [00000000000719e0] 0x719e0 (unreliable)
      [  442.659677] [c000000f6dc3f880] [c0000000004435a8] .pci_set_pcie_reset_state+0x28/0x40
      [  442.659757] [c000000f6dc3f900] [c000000000455bf8] .reset_fundamental+0x38/0x80
      [  442.659835] [c000000f6dc3f980] [c0000000004562a8] .pci_dev_specific_reset+0xa8/0xf0
      [  442.659913] [c000000f6dc3fa00] [c0000000004448c4] .__pci_dev_reset+0x44/0x430
      [  442.659980] [c000000f6dc3fab0] [c000000000444d5c] .pci_reset_function+0x7c/0xc0
      [  442.660059] [c000000f6dc3fb30] [d00000001c141ab8] .vfio_pci_open+0xe8/0x2b0 [vfio_pci]
      [  442.660139] [c000000f6dc3fbd0] [c000000000586c30] .vfio_group_fops_unl_ioctl+0x3a0/0x630
      [  442.660219] [c000000f6dc3fc90] [c000000000255fbc] .do_vfs_ioctl+0x4ec/0x7c0
      [  442.660286] [c000000f6dc3fd80] [c000000000256364] .SyS_ioctl+0xd4/0xf0
      [  442.660354] [c000000f6dc3fe30] [c000000000009e54] syscall_exit+0x0/0x98
      [  442.660420] Instruction dump:
      [  442.660454] 4bfffce9 4bfffee4 7c0802a6 fbc1fff0 fbe1fff8 f8010010 f821ff81 7c7e1b78
      [  442.660566] 7c9f2378 60000000 60000000 e93e02c8 <e8690060> 2fa30000 41de00c4 2b9f0002
      [  442.660679] ---[ end trace a64ac9546bcf0328 ]---
      [  442.660724]
      
      The reason is current VF is not EEH enabled.
      
      This patch introduces a macro to convert eeh_dev to eeh_pe. By doing so, it
      will prevent converting with NULL pointer.
      Signed-off-by: default avatarWei Yang <weiyang@linux.vnet.ibm.com>
      Acked-by: default avatarGavin Shan <gwshan@linux.vnet.ibm.com>
      CC: Michael Ellerman <mpe@ellerman.id.au>
      
      V3 -> V4:
         1. move the macro definition from include/linux/pci.h to
            arch/powerpc/include/asm/eeh.h
      
      V2 -> V3:
         1. rebased on 3.17-rc4
         2. introduce a macro
         3. use this macro in several other places
      
      V1 -> V2:
         1. code style and patch subject adjustment
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      2a58222f
    • Michael Ellerman's avatar
      powerpc/mm: Unindent htab_dt_scan_page_sizes() · 9e34992a
      Michael Ellerman authored
      We can unindent the bulk of htab_dt_scan_page_sizes() by returning early
      if the property is not found. That is nice in and of itself, but also
      has the advantage of making it clear that we always return success once
      we have found the ibm,segment-page-sizes property.
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      9e34992a
    • Michael Ellerman's avatar
      powerpc/ppc64: Print CPU/MMU/FW features at boot · 87d99c0e
      Michael Ellerman authored
      "Helps debug funky firmware issues".
      
      After:
        Starting Linux PPC64 #108 SMP Wed Aug 6 19:04:51 EST 2014
        -----------------------------------------------------
        ppc64_pft_size    = 0x1a
        phys_mem_size     = 0x200000000
        cpu_features      = 0x17fc7a6c18500249
          possible        = 0x1fffffff18700649
          always          = 0x0000000000000040
        cpu_user_features = 0xdc0065c2 0xee000000
        mmu_features      = 0x5a000001
        firmware_features = 0x00000001405a440b
        htab_hash_mask    = 0x7ffff
        -----------------------------------------------------
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      87d99c0e
    • Michael Ellerman's avatar
      powerpc/ppc64: Clean up the boot-time settings display · bdce97e9
      Michael Ellerman authored
      At boot we display a bunch of low level settings which can be useful to
      know, and can help to spot bugs when things are fundamentally
      misconfigured.
      
      At the moment they are very widely spaced, so that we can accommodate
      the line:
      
        ppc64_caches.dcache_line_size = 0xYY
      
      But we only print that line when the cache line size is not 128, ie.
      almost never, so it just makes the display look odd usually.
      
      The ppc64_caches prefix is redundant so remove it, which means we can
      align things a bit closer for the common case. While we're there
      replace the last use of camelCase (physicalMemorySize), and use
      phys_mem_size.
      
      Before:
        Starting Linux PPC64 #104 SMP Wed Aug 6 18:41:34 EST 2014
        -----------------------------------------------------
        ppc64_pft_size                = 0x1a
        physicalMemorySize            = 0x200000000
        ppc64_caches.dcache_line_size = 0xf0
        ppc64_caches.icache_line_size = 0xf0
        htab_address                  = 0xdeadbeef
        htab_hash_mask                = 0x7ffff
        physical_start                = 0xf000bar
        -----------------------------------------------------
      
      After:
        Starting Linux PPC64 #103 SMP Wed Aug 6 18:38:04 EST 2014
        -----------------------------------------------------
        ppc64_pft_size    = 0x1a
        phys_mem_size     = 0x200000000
        dcache_line_size  = 0xf0
        icache_line_size  = 0xf0
        htab_address      = 0xdeadbeef
        htab_hash_mask    = 0x7ffff
        physical_start    = 0xf000bar
        -----------------------------------------------------
      
      This patch is final, no bike shedding ;)
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      bdce97e9