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KVM: MMU: Avoid dropping accessed bit while removing write access

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One more "KVM: MMU: Don't drop accessed bit while updating an spte."

Sptes are accessed by both kvm and hardware.
This patch uses update_spte() to fix the way of removing write access.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Takuya Yoshikawa 2010-12-06 01:11:33 +09:00 committed by Avi Kivity
parent a295673aba
commit 700e1b1219
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kvm/mmu.c
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@ -3447,7 +3447,7 @@ void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot)
for (i = 0; i < PT64_ENT_PER_PAGE; ++i)
/* avoid RMW */
if (is_writable_pte(pt[i]))
pt[i] &= ~PT_WRITABLE_MASK;
update_spte(&pt[i], pt[i] & ~PT_WRITABLE_MASK);
}
kvm_flush_remote_tlbs(kvm);
}