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linux/arch/powerpc/mm
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Jimi Xenidis de801de139 powerpc/icswx: Fix race condition with IPI setting ACOP 
There is a race where a thread causes a coprocessor type to be valid
in its own ACOP _and_ in the current context, but it does not
propagate to the ACOP register of other threads in time for them to
use it.  The original code tries to solve this by sending an IPI to
all threads on the system, which is heavy handed, but unfortunately
still provides a window where the icswx is issued by other threads and
the ACOP is not up to date.

This patch detects that the ACOP DSI fault was a "false positive" and
syncs the ACOP and causes the icswx to be replayed.

Signed-off-by: Jimi Xenidis <jimix@pobox.com>
Cc: Anton Blanchard <anton@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-03-07 17:06:09 +11:00
..
40x_mmu.c memblock: Remove rmo_size, burry it in arch/powerpc where it belongs 2010-08-05 12:56:08 +10:00
44x_mmu.c powerpc: Rename mapping based RELOCATABLE to DYNAMIC_MEMSTART for BookE 2011-12-20 10:20:19 -05:00
dma-noncoherent.c powerpc: include export.h for files using EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:30:38 -04:00
fault.c powerpc/icswx: Simple ACOP fault handler 2011-11-25 14:11:28 +11:00
fsl_booke_mmu.c powerpc/fsl-booke: Fix settlbcam for 64-bit 2011-10-12 23:39:10 -05:00
gup.c powerpc: remove superfluous PageTail checks on the pte gup_fast 2011-11-02 16:06:57 -07:00
hash_low_32.S powerpc: Use names rather than numbers for SPRGs (v2) 2009-08-20 10:12:27 +10:00
hash_low_64.S powerpc: Free up some CPU feature bits by moving out MMU-related features 2011-04-27 14:18:52 +10:00
hash_native_64.c KVM: PPC: book3s_hv: Add support for PPC970-family processors 2011-07-12 13:16:59 +03:00
hash_utils_64.c fadump: Register for firmware assisted dump. 2012-02-23 10:50:01 +11:00
highmem.c mm: fix race in kunmap_atomic() 2010-10-27 18:03:05 -07:00
hugetlbpage-book3e.c powerpc/book3e: Change hugetlb preload to take vma argument 2011-12-07 16:26:24 +11:00
hugetlbpage-hash64.c powerpc/mm: Add some debug output when hash insertion fails 2010-07-23 12:56:56 +10:00
hugetlbpage.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2012-01-06 17:58:22 -08:00
icswx.c powerpc/icswx: Fix race condition with IPI setting ACOP 2012-03-07 17:06:09 +11:00
icswx.h powerpc/icswx: Fix race condition with IPI setting ACOP 2012-03-07 17:06:09 +11:00
icswx_pid.c powerpc: Split ICSWX ACOP and PID processing 2011-11-25 14:11:27 +11:00
init_32.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2012-01-06 17:58:22 -08:00
init_64.c powerpc: Move free_initmem to common code 2011-06-30 15:28:05 +10:00
Makefile powerpc: Split ICSWX ACOP and PID processing 2011-11-25 14:11:27 +11:00
mem.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2012-01-06 17:58:22 -08:00
mmap_64.c powerpc+sparc64/mm: Remove hack in mmap randomize layout 2011-11-28 11:42:09 +11:00
mmu_context_hash32.c powerpc: include export.h for files using EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:30:38 -04:00
mmu_context_hash64.c powerpc: Split ICSWX ACOP and PID processing 2011-11-25 14:11:27 +11:00
mmu_context_nohash.c powerpc: Hugetlb for BookE 2011-09-20 09:19:40 +10:00
mmu_decl.h powerpc/fsl-booke: Fix setup_initial_memory_limit to not blindly map 2011-10-11 23:30:41 -05:00
numa.c cpumask: update setup_node_to_cpumask_map() comments 2012-01-12 20:13:11 -08:00
pgtable.c powerpc: Hugetlb for BookE 2011-09-20 09:19:40 +10:00
pgtable_32.c powerpc: Remove ioremap_flags 2011-05-19 14:30:43 +10:00
pgtable_64.c powerpc: add export.h to files making use of EXPORT_SYMBOL 2011-10-31 19:30:37 -04:00
ppc_mmu_32.c memblock: Remove rmo_size, burry it in arch/powerpc where it belongs 2010-08-05 12:56:08 +10:00
slb.c powerpc: Free up some CPU feature bits by moving out MMU-related features 2011-04-27 14:18:52 +10:00
slb_low.S powerpc: Free up some CPU feature bits by moving out MMU-related features 2011-04-27 14:18:52 +10:00
slice.c powerpc: various straight conversions from module.h --> export.h 2011-10-31 19:30:44 -04:00
stab.c powerpc: Free up some CPU feature bits by moving out MMU-related features 2011-04-27 14:18:52 +10:00
subpage-prot.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
tlb_hash32.c powerpc: include export.h for files using EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:30:38 -04:00
tlb_hash64.c mm, powerpc: move the RCU page-table freeing into generic code 2011-05-25 08:39:16 -07:00
tlb_low_64e.S powerpc: Add hugepage support to 64-bit tablewalk code for FSL_BOOK3E 2011-12-07 16:26:22 +11:00
tlb_nohash.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2012-01-06 17:58:22 -08:00
tlb_nohash_low.S powerpc/476: Workaround for PLB6 hang 2011-02-02 06:59:02 -05:00