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629149fae4
linux/arch/powerpc/mm
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Aneesh Kumar K.V 629149fae4 powerpc/thp: Invalidate old 64K based hash page mapping before insert of 4k pte 
If we changed base page size of the segment, either via sub_page_protect
or via remap_4k_pfn, we do a demote_segment which doesn't flush the hash
table entries. We do a lazy hash page table flush for all mapped pages
in the demoted segment. This happens when we handle hash page fault
for these pages.

We use _PAGE_COMBO bit along with _PAGE_HASHPTE to indicate whether a
pte is backed by 4K hash pte. If we find _PAGE_COMBO not set on the pte,
that implies that we could possibly have older 64K hash pte entries in
the hash page table and we need to invalidate those entries.

Handle this correctly for 16M pages

CC: <stable@vger.kernel.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-08-13 18:20:39 +10:00
..
40x_mmu.c
44x_mmu.c powerpc: Delete __cpuinit usage from all users 2013-07-01 11:10:36 +10:00
dma-noncoherent.c lib/scatterlist: make ARCH_HAS_SG_CHAIN an actual Kconfig 2014-08-08 15:57:26 -07:00
fault.c arch: mm: pass userspace fault flag to generic fault handler 2013-09-12 15:38:01 -07:00
fsl_booke_mmu.c powerpc/e6500: TLB miss handler with hardware tablewalk support 2014-01-09 17:52:19 -06:00
gup.c powerpc/mm: NUMA pte should be handled via slow path in get_user_pages_fast() 2014-04-09 12:53:03 +10:00
hash_low_32.S powerpc: Use CURRENT_THREAD_INFO instead of open coded assembly 2012-07-11 14:18:22 +10:00
hash_low_64.S powerpc: Fix branch patching code for ABIv2 2014-04-23 10:05:22 +10:00
hash_native_64.c powerpc/thp: Don't recompute vsid and ssize in loop on invalidate 2014-08-13 18:20:38 +10:00
hash_utils_64.c powerpc: implement vmemmap_remove_mapping() for BOOK3S 2014-08-05 16:34:15 +10:00
highmem.c
hugepage-hash64.c powerpc/thp: Invalidate old 64K based hash page mapping before insert of 4k pte 2014-08-13 18:20:39 +10:00
hugetlbpage-book3e.c powerpc/fsl-book3e-64: Use paca for hugetlb TLB1 entry selection 2014-01-09 17:52:20 -06:00
hugetlbpage-hash64.c powerpc/mm: Free up _PAGE_COHERENCE for numa fault use later 2013-12-09 11:40:28 +11:00
hugetlbpage.c hugetlb: restrict hugepage_migration_support() to x86_64 2014-06-04 16:53:51 -07:00
icswx_pid.c powerpc: Split ICSWX ACOP and PID processing 2011-11-25 14:11:27 +11:00
icswx.c powerpc: Fix typo "CONFIG_ICSWX_PID" 2013-04-18 13:03:54 +10:00
icswx.h powerpc/icswx: Fix race condition with IPI setting ACOP 2012-03-07 17:06:09 +11:00
init_32.c powerpc/8xx: Fixing memory init issue with CONFIG_PIN_TLB 2013-10-28 21:11:22 -05:00
init_64.c powerpc: start loop at section start of start in vmemmap_populated() 2014-08-05 16:34:23 +10:00
Makefile powerpc: Remove STAB code 2014-07-28 14:10:22 +10:00
mem.c memory-hotplug: ppc: suitable memory should go to ZONE_MOVABLE 2014-08-06 18:01:21 -07:00
mmap.c mm: remove free_area_cache 2013-07-10 18:11:34 -07:00
mmu_context_hash32.c powerpc: Remove power3 from comments 2014-07-28 14:10:26 +10:00
mmu_context_hash64.c powerpc: Reduce PTE table memory wastage 2013-04-30 16:00:07 +10:00
mmu_context_nohash.c powerpc: Clean up MMU_FTRS_A2 and MMU_FTR_TYPE_3E 2014-07-11 12:55:05 +10:00
mmu_decl.h powerpc/fsl_booke: smp support for booting a relocatable kernel above 64M 2014-01-09 17:52:18 -06:00
numa.c powerpc: reorder per-cpu NUMA information's initialization 2014-08-13 15:14:05 +10:00
pgtable_32.c powerpc: Remove CONFIG_POWER3 2014-07-28 14:10:24 +10:00
pgtable_64.c powerpc/thp: Don't recompute vsid and ssize in loop on invalidate 2014-08-13 18:20:38 +10:00
pgtable.c powerpc: Delete non-required instances of include <linux/init.h> 2014-01-15 13:46:44 +11:00
ppc_mmu_32.c powerpc: Remove power3 from comments 2014-07-28 14:10:26 +10:00
slb_low.S Merge remote-tracking branch 'anton/abiv2' into next 2014-05-05 20:57:12 +10:00
slb.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2014-06-10 18:54:22 -07:00
slice.c powerpc/mm: Fix mmap errno when MAP_FIXED is set and mapping exceeds the allowed address space 2014-01-29 17:02:25 +11:00
subpage-prot.c powerpc/mm: Add new "set" flag argument to pte/pmd update function 2014-02-17 11:19:35 +11:00
tlb_hash32.c
tlb_hash64.c powerpc: Delete non-required instances of include <linux/init.h> 2014-01-15 13:46:44 +11:00
tlb_low_64e.S powerpc/e6500: Work around erratum A-008139 2014-07-29 19:26:29 -05:00
tlb_nohash_low.S powerpc/fsl_booke: smp support for booting a relocatable kernel above 64M 2014-01-09 17:52:18 -06:00
tlb_nohash.c powerpc/nohash: Split __early_init_mmu() into boot and secondary 2014-08-13 15:13:25 +10:00