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authorMarcelo Tosatti <mtosatti@redhat.com>2009-06-10 12:27:07 -0300
committerAvi Kivity <avi@redhat.com>2009-09-10 08:32:54 +0300
commit2aaf65e8c40468b198b709a765abe311f91c1a1d (patch)
treebdd3804ee2c76136c914798850ed760be40e8dc8 /arch
parent48fc03174b125238c541cf00acd5e9b9dff6b9ba (diff)
KVM: MMU audit: audit_mappings tweaks
- Fail early in case gfn_to_pfn returns is_error_pfn. - For the pre pte write case, avoid spurious "gva is valid but spte is notrap" messages (the emulation code does the guest write first, so this particular case is OK). Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kvm/mmu.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 86433513fb7..50fe8541ed3 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -3117,6 +3117,11 @@ static void audit_mappings_page(struct kvm_vcpu *vcpu, u64 page_pte,
pfn_t pfn = gfn_to_pfn(vcpu->kvm, gfn);
hpa_t hpa = (hpa_t)pfn << PAGE_SHIFT;
+ if (is_error_pfn(pfn)) {
+ kvm_release_pfn_clean(pfn);
+ continue;
+ }
+
if (is_shadow_present_pte(ent)
&& (ent & PT64_BASE_ADDR_MASK) != hpa)
printk(KERN_ERR "xx audit error: (%s) levels %d"
@@ -3288,7 +3293,8 @@ static void kvm_mmu_audit(struct kvm_vcpu *vcpu, const char *msg)
audit_msg = msg;
audit_rmap(vcpu);
audit_write_protection(vcpu);
- audit_mappings(vcpu);
+ if (strcmp("pre pte write", audit_msg) != 0)
+ audit_mappings(vcpu);
audit_writable_sptes_have_rmaps(vcpu);
dbg = olddbg;
}