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PPC: Fix large page support in TCG

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Fix large page support in TCG. The old code would overwrite the large page
table entry with the fake 4 KB one generated here whenever the ref/change bits
were updated, causing it to point to the wrong area of memory.

Signed-off-by: Nathan Whitehorn <nwhitehorn@freebsd.org>
Acked-by: David Gibson <david@gibson.drobpear.id.au>
[agraf: fix whitespace, braces]
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Nathan Whitehorn 2012-03-09 04:30:41 +00:00 committed by Alexander Graf
parent 2e06214f22
commit eb6ea4b22e
1 changed files with 6 additions and 6 deletions
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12
target-ppc/helper.c
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@ -591,12 +591,6 @@ static inline int _find_pte(CPUPPCState *env, mmu_ctx_t *ctx, int is_64b, int h,
pte1 = ldq_phys(env->htab_base + pteg_off + (i * 16) + 8);
}
/* We have a TLB that saves 4K pages, so let's
* split a huge page to 4k chunks */
if (target_page_bits != TARGET_PAGE_BITS)
pte1 |= (ctx->eaddr & (( 1 << target_page_bits ) - 1))
& TARGET_PAGE_MASK;
r = pte64_check(ctx, pte0, pte1, h, rw, type);
LOG_MMU("Load pte from " TARGET_FMT_lx " => " TARGET_FMT_lx " "
TARGET_FMT_lx " %d %d %d " TARGET_FMT_lx "\n",
@ -672,6 +666,12 @@ static inline int _find_pte(CPUPPCState *env, mmu_ctx_t *ctx, int is_64b, int h,
}
}
/* We have a TLB that saves 4K pages, so let's
* split a huge page to 4k chunks */
if (target_page_bits != TARGET_PAGE_BITS) {
ctx->raddr |= (ctx->eaddr & ((1 << target_page_bits) - 1))
& TARGET_PAGE_MASK;
}
return ret;
}