KVM: MMU: audit: check whether have unsync sps after root sync

After root synced, all unsync sps are synced, this patch add a check to make
sure it's no unsync sps in VCPU's page table

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

1 files changed, 9 insertions, 2 deletions

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index afde64ba118d..ba7e7646fb78 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -53,14 +53,18 @@ enum {
         AUDIT_PRE_PAGE_FAULT,
         AUDIT_POST_PAGE_FAULT,
         AUDIT_PRE_PTE_WRITE,
-        AUDIT_POST_PTE_WRITE
+        AUDIT_POST_PTE_WRITE,
+        AUDIT_PRE_SYNC,
+        AUDIT_POST_SYNC
 };
 
 char *audit_point_name[] = {
         "pre page fault",
         "post page fault",
         "pre pte write",
-        "post pte write"
+        "post pte write",
+        "pre sync",
+        "post sync"
 };
 
 #undef MMU_DEBUG
@@ -2516,6 +2520,8 @@ static void mmu_sync_roots(struct kvm_vcpu *vcpu)
 
         if (!VALID_PAGE(vcpu->arch.mmu.root_hpa))
                 return;
+
+        trace_kvm_mmu_audit(vcpu, AUDIT_PRE_SYNC);
         if (vcpu->arch.mmu.root_level == PT64_ROOT_LEVEL) {
                 hpa_t root = vcpu->arch.mmu.root_hpa;
                 sp = page_header(root);
@@ -2531,6 +2537,7 @@ static void mmu_sync_roots(struct kvm_vcpu *vcpu)
                         mmu_sync_children(vcpu, sp);
                 }
         }
+        trace_kvm_mmu_audit(vcpu, AUDIT_POST_SYNC);
 }
 
 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu)