From: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Date: Fri, 4 Mar 2011 10:58:02 +0000 (+0800)
Subject: KVM: MMU: set spte accessed bit properly
X-Git-Tag: v3.12-rc1~6893^2~14
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=1b7fd45c32fcc170246bf10ba8d33871840319b8;p=kernel%2Fkernel-generic.git

KVM: MMU: set spte accessed bit properly

Set spte accessed bit only if guest_initiated == 1 that means the really
accessed

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
---

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index b9bf016..d5455b1 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -3307,11 +3307,11 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
 	spin_lock(&vcpu->kvm->mmu_lock);
 	if (atomic_read(&vcpu->kvm->arch.invlpg_counter) != invlpg_counter)
 		gentry = 0;
-	kvm_mmu_access_page(vcpu, gfn);
 	kvm_mmu_free_some_pages(vcpu);
 	++vcpu->kvm->stat.mmu_pte_write;
 	trace_kvm_mmu_audit(vcpu, AUDIT_PRE_PTE_WRITE);
 	if (guest_initiated) {
+		kvm_mmu_access_page(vcpu, gfn);
 		if (gfn == vcpu->arch.last_pt_write_gfn
 		    && !last_updated_pte_accessed(vcpu)) {
 			++vcpu->arch.last_pt_write_count;