Commit 700e1b12 authored Dec 06, 2010 by Takuya Yoshikawa Committed by Avi Kivity Jan 12, 2011

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



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>

parent a295673a

arch/x86/kvm/mmu.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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);
		}