KVM: MMU: Fix auditing code

Fix build breakage of hpa lookup in audit_mappings_page. Moreover, make
this function robust against shadow_notrap_nonpresent_pte entries.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index b39ec62..3592aea 100644 (file)
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -3029,11 +3029,13 @@ static void audit_mappings_page(struct kvm_vcpu *vcpu, u64 page_pte,
                                       " in nonleaf level: levels %d gva %lx"
                                       " level %d pte %llx\n", audit_msg,
                                       vcpu->arch.mmu.root_level, va, level, ent);
-
-                       audit_mappings_page(vcpu, ent, va, level - 1);
+                       else
+                               audit_mappings_page(vcpu, ent, va, level - 1);
                } else {
                        gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, va);
-                       hpa_t hpa = (hpa_t)gpa_to_pfn(vcpu, gpa) << PAGE_SHIFT;
+                       gfn_t gfn = gpa >> PAGE_SHIFT;
+                       pfn_t pfn = gfn_to_pfn(vcpu->kvm, gfn);
+                       hpa_t hpa = (hpa_t)pfn << PAGE_SHIFT;
 
                        if (is_shadow_present_pte(ent)
                            && (ent & PT64_BASE_ADDR_MASK) != hpa)