From: Izik Eidus <[EMAIL PROTECTED]>
Right now rmap_remove won't set the page as dirty if the shadow pte
pointed to this page had write access and then it became readonly.
This patches fixes that, by setting the page as dirty for spte changes from
write to readonly access.
Signed-off-by: Izik Eidus <[EMAIL PROTECTED]>
Signed-off-by: Avi Kivity <[EMAIL PROTECTED]>
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 324ff9a..cb62ef6 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -890,6 +890,7 @@ static void mmu_set_spte(struct kvm_vcpu *vcpu, u64
*shadow_pte,
{
u64 spte;
int was_rmapped = is_rmap_pte(*shadow_pte);
+ int was_writeble = is_writeble_pte(*shadow_pte);
pgprintk("%s: spte %llx access %x write_fault %d"
" user_fault %d gfn %lx\n",
@@ -956,9 +957,12 @@ unshadowed:
rmap_add(vcpu, shadow_pte, gfn);
if (!is_rmap_pte(*shadow_pte))
kvm_release_page_clean(page);
+ } else {
+ if (was_writeble)
+ kvm_release_page_dirty(page);
+ else
+ kvm_release_page_clean(page);
}
- else
- kvm_release_page_clean(page);
if (!ptwrite || !*ptwrite)
vcpu->arch.last_pte_updated = shadow_pte;
}
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