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powerpc/mm: handle hugepage size correctly when invalidating hpte entries

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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 0608d69246
"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>
This commit is contained in:
Aneesh Kumar K.V
2013-06-20 14:30:13 +05:30
committed by Benjamin Herrenschmidt
parent 8998897b8f
commit db3d853490
9 changed files with 95 additions and 107 deletions
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8
arch/powerpc/include/asm/machdep.h
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@@ -36,13 +36,13 @@ struct machdep_calls {
#ifdef CONFIG_PPC64
void (*hpte_invalidate)(unsigned long slot,
unsigned long vpn,
int psize, int ssize,
int local);
int bpsize, int apsize,
int ssize, int local);
long (*hpte_updatepp)(unsigned long slot,
unsigned long newpp,
unsigned long vpn,
int psize, int ssize,
int local);
int bpsize, int apsize,
int ssize, int local);
void (*hpte_updateboltedpp)(unsigned long newpp,
unsigned long ea,
int psize, int ssize);