[PATCH v2 2/2] KVM: nVMX: Check host support for MSR bitmaps

[Jim Mattson <jmattson@xxxxxxxxxx>]

If the host doesn't support MSR bitmaps, but the L2 guest is
configured to use MSR bitmaps, fail the emulated VM-entry.

Fixes: 3af18d9c5fe95 ("KVM: nVMX: Prepare for using hardware MSR bitmap")
Signed-off-by: Jim Mattson <jmattson@xxxxxxxxxx>
---
 arch/x86/kvm/vmx.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 0d72b4064a80..639188037744 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -9587,12 +9587,10 @@ static void vmx_start_preemption_timer(struct kvm_vcpu *vcpu)
 static int nested_vmx_check_msr_bitmap_controls(struct kvm_vcpu *vcpu,
 						struct vmcs12 *vmcs12)
 {
-	u64 addr;
-
 	if (!nested_cpu_has(vmcs12, CPU_BASED_USE_MSR_BITMAPS))
 		return 0;
 
-	if (vmcs12_read_any(vcpu, MSR_BITMAP, &addr)) {
+	if (!cpu_has_vmx_msr_bitmap()) {
 		WARN_ON(1);
 		return -EINVAL;
 	}
-- 
2.13.0.219.gdb65acc882-goog