KVM/nSVM: properly map nested VMCB

Commit 8c5fbf1a7231 ("KVM/nSVM: Use the new mapping API for mapping guest
memory") broke nested SVM completely: kvm_vcpu_map()'s second parameter is
GFN so vmcb_gpa needs to be converted with gpa_to_gfn(), not the other way
around.

Fixes: 8c5fbf1a7231 ("KVM/nSVM: Use the new mapping API for mapping guest memory")
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 735b8c0..5beca10 100644 (file)
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -3293,7 +3293,7 @@ static int nested_svm_vmexit(struct vcpu_svm *svm)
                                       vmcb->control.exit_int_info_err,
                                       KVM_ISA_SVM);
 
-       rc = kvm_vcpu_map(&svm->vcpu, gfn_to_gpa(svm->nested.vmcb), &map);
+       rc = kvm_vcpu_map(&svm->vcpu, gpa_to_gfn(svm->nested.vmcb), &map);
        if (rc) {
                if (rc == -EINVAL)
                        kvm_inject_gp(&svm->vcpu, 0);
@@ -3583,7 +3583,7 @@ static bool nested_svm_vmrun(struct vcpu_svm *svm)
 
        vmcb_gpa = svm->vmcb->save.rax;
 
-       rc = kvm_vcpu_map(&svm->vcpu, gfn_to_gpa(vmcb_gpa), &map);
+       rc = kvm_vcpu_map(&svm->vcpu, gpa_to_gfn(vmcb_gpa), &map);
        if (rc) {
                if (rc == -EINVAL)
                        kvm_inject_gp(&svm->vcpu, 0);