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| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2013-06-20 14:30:13 +0530 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-06-21 16:01:52 +1000 |
| commit | db3d8534903c8a9617142975bec6db95acaba753 (patch) | |
| tree | eea268dcfdd5cce84aa9b32025528dbc2d71d5aa /arch/powerpc/mm/hash_low_64.S | |
| parent | 8998897b8f966c9036307b5130494d4bf1e6cb18 (diff) | |
| download | linux-db3d8534903c8a9617142975bec6db95acaba753.tar.gz | |
powerpc/mm: handle hugepage size correctly when invalidating hpte entries
If a hash bucket gets full, we "evict" a more/less random entry from it. When we do that we don't invalidate the TLB (hpte_remove) because we assume the old translation is still technically "valid". This implies that when we are invalidating or updating pte, even if HPTE entry is not valid we should do a tlb invalidate. With hugepages, we need to pass the correct actual page size value for tlb invalidation. This change update the patch 0608d692463598c1d6e826d9dd7283381b4f246c "powerpc/mm: Always invalidate tlb on hpte invalidate and update" to handle transparent hugepages correctly. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/mm/hash_low_64.S')
| -rw-r--r-- | arch/powerpc/mm/hash_low_64.S | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/arch/powerpc/mm/hash_low_64.S b/arch/powerpc/mm/hash_low_64.S index 0e980acae67c..d3cbda62857b 100644 --- a/arch/powerpc/mm/hash_low_64.S +++ b/arch/powerpc/mm/hash_low_64.S @@ -289,9 +289,10 @@ htab_modify_pte: /* Call ppc_md.hpte_updatepp */ mr r5,r29 /* vpn */ - li r6,MMU_PAGE_4K /* page size */ - ld r7,STK_PARAM(R9)(r1) /* segment size */ - ld r8,STK_PARAM(R8)(r1) /* get "local" param */ + li r6,MMU_PAGE_4K /* base page size */ + li r7,MMU_PAGE_4K /* actual page size */ + ld r8,STK_PARAM(R9)(r1) /* segment size */ + ld r9,STK_PARAM(R8)(r1) /* get "local" param */ _GLOBAL(htab_call_hpte_updatepp) bl . /* Patched by htab_finish_init() */ @@ -649,9 +650,10 @@ htab_modify_pte: /* Call ppc_md.hpte_updatepp */ mr r5,r29 /* vpn */ - li r6,MMU_PAGE_4K /* page size */ - ld r7,STK_PARAM(R9)(r1) /* segment size */ - ld r8,STK_PARAM(R8)(r1) /* get "local" param */ + li r6,MMU_PAGE_4K /* base page size */ + li r7,MMU_PAGE_4K /* actual page size */ + ld r8,STK_PARAM(R9)(r1) /* segment size */ + ld r9,STK_PARAM(R8)(r1) /* get "local" param */ _GLOBAL(htab_call_hpte_updatepp) bl . /* patched by htab_finish_init() */ @@ -937,9 +939,10 @@ ht64_modify_pte: /* Call ppc_md.hpte_updatepp */ mr r5,r29 /* vpn */ - li r6,MMU_PAGE_64K - ld r7,STK_PARAM(R9)(r1) /* segment size */ - ld r8,STK_PARAM(R8)(r1) /* get "local" param */ + li r6,MMU_PAGE_64K /* base page size */ + li r7,MMU_PAGE_64K /* actual page size */ + ld r8,STK_PARAM(R9)(r1) /* segment size */ + ld r9,STK_PARAM(R8)(r1) /* get "local" param */ _GLOBAL(ht64_call_hpte_updatepp) bl . /* patched by htab_finish_init() */ |