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[PATCH] KVM: MMU: If an empty shadow page is not empty, report more info

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Signed-off-by: Avi Kivity <[email protected]>
Acked-by: Ingo Molnar <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Avi Kivity 2007-01-05 16:36:50 -08:00 • committed by Linus Torvalds
commit 139bdb2d9e
1 changed files with 8 additions and 4 deletions
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12
drivers/kvm/mmu.c
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@ -305,12 +305,16 @@ static void rmap_write_protect(struct kvm *kvm, u64 gfn)
static int is_empty_shadow_page(hpa_t page_hpa)
{
u32 *pos;
u32 *end;
for (pos = __va(page_hpa), end = pos + PAGE_SIZE / sizeof(u32);
u64 *pos;
u64 *end;
for (pos = __va(page_hpa), end = pos + PAGE_SIZE / sizeof(u64);
pos != end; pos++)
if (*pos != 0)
if (*pos != 0) {
printk(KERN_ERR "%s: %p %llx\n", __FUNCTION__,
pos, *pos);
return 0;
}
return 1;
}