[PATCH] KVM: MMU: add audit code to check mappings, etc are correct

Signed-off-by: Avi Kivity <avi@qumranet.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/kvm/paging_tmpl.h b/drivers/kvm/paging_tmpl.h
index 32b385188454..c894b51ba3f8 100644
--- a/drivers/kvm/paging_tmpl.h
+++ b/drivers/kvm/paging_tmpl.h
@@ -355,6 +355,7 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr,
         int r;
 
         pgprintk("%s: addr %lx err %x\n", __FUNCTION__, addr, error_code);
+        kvm_mmu_audit(vcpu, "pre page fault");
 
         r = mmu_topup_memory_caches(vcpu);
         if (r)
@@ -402,6 +403,7 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr,
                 pgprintk("%s: io work, no access\n", __FUNCTION__);
                 inject_page_fault(vcpu, addr,
                                   error_code | PFERR_PRESENT_MASK);
+                kvm_mmu_audit(vcpu, "post page fault (io)");
                 return 0;
         }
 
@@ -410,10 +412,12 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr,
          */
         if (pte_present && !fixed && !write_pt) {
                 inject_page_fault(vcpu, addr, error_code);
+                kvm_mmu_audit(vcpu, "post page fault (guest)");
                 return 0;
         }
 
         ++kvm_stat.pf_fixed;
+        kvm_mmu_audit(vcpu, "post page fault (fixed)");
 
         return write_pt;
 }