1. 28 Jul, 2014 19 commits
  2. 23 Jul, 2014 1 commit
  3. 22 Jul, 2014 5 commits
    • Li Zhong's avatar
      powerpc: use _GLOBAL_TOC for memmove · 6f5405bc
      Li Zhong authored
      
      
      memmove may be called from module code copy_pages(btrfs), and it may
      call memcpy, which may call back to C code, so it needs to use
      _GLOBAL_TOC to set up r2 correctly.
      
      This fixes following error when I tried to boot an le guest:
      
      Vector: 300 (Data Access) at [c000000073f97210]
          pc: c000000000015004: enable_kernel_altivec+0x24/0x80
          lr: c000000000058fbc: enter_vmx_copy+0x3c/0x60
          sp: c000000073f97490
         msr: 8000000002009033
         dar: d000000001d50170
       dsisr: 40000000
        current = 0xc0000000734c0000
        paca    = 0xc00000000fff0000	 softe: 0	 irq_happened: 0x01
          pid   = 815, comm = mktemp
      enter ? for help
      [c000000073f974f0] c000000000058fbc enter_vmx_copy+0x3c/0x60
      [c000000073f97510] c000000000057d34 memcpy_power7+0x274/0x840
      [c000000073f97610] d000000001c3179c copy_pages+0xfc/0x110 [btrfs]
      [c000000073f97660] d000000001c3c248 memcpy_extent_buffer+0xe8/0x160 [btrfs]
      [c000000073f97700] d000000001be4be8 setup_items_for_insert+0x208/0x4a0 [btrfs]
      [c000000073f97820] d000000001be50b4 btrfs_insert_empty_items+0xf4/0x140 [btrfs]
      [c000000073f97890] d000000001bfed30 insert_with_overflow+0x70/0x180 [btrfs]
      [c000000073f97900] d000000001bff174 btrfs_insert_dir_item+0x114/0x2f0 [btrfs]
      [c000000073f979a0] d000000001c1f92c btrfs_add_link+0x10c/0x370 [btrfs]
      [c000000073f97a40] d000000001c20e94 btrfs_create+0x204/0x270 [btrfs]
      [c000000073f97b00] c00000000026d438 vfs_create+0x178/0x210
      [c000000073f97b50] c000000000270a70 do_last+0x9f0/0xe90
      [c000000073f97c20] c000000000271010 path_openat+0x100/0x810
      [c000000073f97ce0] c000000000272ea8 do_filp_open+0x58/0xd0
      [c000000073f97dc0] c00000000025ade8 do_sys_open+0x1b8/0x300
      [c000000073f97e30] c00000000000a008 syscall_exit+0x0/0x7c
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      6f5405bc
    • Tyrel Datwyler's avatar
      powerpc/pseries: dynamically added OF nodes need to call of_node_init · 97a9a717
      Tyrel Datwyler authored
      Commit 75b57ecf refactored device tree nodes to use kobjects such that they
      can be exposed via /sysfs. A secondary commit 0829f6d1 furthered this rework
      by moving the kobect initialization logic out of of_node_add into its own
      of_node_init function. The inital commit removed the existing kref_init calls
      in the pseries dlpar code with the assumption kobject initialization would
      occur in of_node_add. The second commit had the side effect of triggering a
      BUG_ON during DLPAR, migration and suspend/resume operations as a result of
      dynamically added nodes being uninitialized.
      
      This patch fixes this by adding of_node_init calls in place of the previously
      removed kref_init calls.
      
      Fixes: 0829f6d1
      
       ("of: device_node kobject lifecycle fixes")
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarTyrel Datwyler <tyreld@linux.vnet.ibm.com>
      Acked-by: default avatarNathan Fontenot <nfont@linux.vnet.ibm.com>
      Acked-by: default avatarGrant Likely <grant.likely@linaro.org>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      97a9a717
    • Aneesh Kumar K.V's avatar
      powerpc: subpage_protect: Increase the array size to take care of 64TB · dad6f37c
      Aneesh Kumar K.V authored
      
      
      We now support TASK_SIZE of 16TB, hence the array should be 8.
      
      Fixes the below crash:
      
      Unable to handle kernel paging request for data at address 0x000100bd
      Faulting instruction address: 0xc00000000004f914
      cpu 0x13: Vector: 300 (Data Access) at [c000000fea75fa90]
          pc: c00000000004f914: .sys_subpage_prot+0x2d4/0x5c0
          lr: c00000000004fb5c: .sys_subpage_prot+0x51c/0x5c0
          sp: c000000fea75fd10
         msr: 9000000000009032
         dar: 100bd
       dsisr: 40000000
        current = 0xc000000fea6ae490
        paca    = 0xc00000000fb8ab00   softe: 0        irq_happened: 0x00
          pid   = 8237, comm = a.out
      enter ? for help
      [c000000fea75fe30] c00000000000a164 syscall_exit+0x0/0x98
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      dad6f37c
    • Paul Mackerras's avatar
      powerpc: Fix bugs in emulate_step() · e698b966
      Paul Mackerras authored
      
      
      This fixes some bugs in emulate_step().  First, the setting of the carry
      bit for the arithmetic right-shift instructions was not correct on 64-bit
      machines because we were masking with a mask of type int rather than
      unsigned long.  Secondly, the sld (shift left doubleword) instruction was
      using the wrong instruction field for the register containing the shift
      count.
      Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      e698b966
    • Joel Stanley's avatar
      powerpc: Disable doorbells on Power8 DD1.x · bd6ba351
      Joel Stanley authored
      These processors do not currently support doorbell IPIs, so remove them
      from the feature list if we are at DD 1.xx for the 0x004d part.
      
      This fixes a regression caused by d4e58e59 (powerpc/powernv: Enable
      POWER8 doorbell IPIs). With that patch the kernel would hang at boot
      when calling smp_call_function_many, as the doorbell would not be
      received by the target CPUs:
      
        .smp_call_function_many+0x2bc/0x3c0 (unreliable)
        .on_each_cpu_mask+0x30/0x100
        .cpuidle_register_driver+0x158/0x1a0
        .cpuidle_register+0x2c/0x110
        .powernv_processor_idle_init+0x23c/0x2c0
        .do_one_initcall+0xd4/0x260
        .kernel_init_freeable+0x25c/0x33c
        .kernel_init+0x1c/0x120
        .ret_from_kernel_thread+0x58/0x7c
      
      Fixes: d4e58e59
      
       (powerpc/powernv: Enable POWER8 doorbell IPIs)
      Signed-off-by: default avatarJoel Stanley <joel@jms.id.au>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      bd6ba351
  4. 11 Jul, 2014 15 commits