1. 28 Jul, 2014 35 commits
  2. 23 Jul, 2014 1 commit
  3. 22 Jul, 2014 4 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