From: Isaku Yamahata <isaku.yamahata@intel.com>

Add checks of VMX controls for APIC timer virtualization on VM entries.

The spec adds some checks on VMX controls related to the APIC timer
virtualization on VM entry.

Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com>
---
 arch/x86/kvm/vmx/nested.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 66adc1821671..c8b42c880300 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -3064,6 +3064,12 @@ static int nested_check_vm_execution_controls(struct kvm_vcpu *vcpu,
 	    CC(!vmcs12->tsc_multiplier))
 		return -EINVAL;
 
+	if (nested_cpu_has_guest_apic_timer(vmcs12) &&
+	    (CC(!nested_cpu_has_vid(vmcs12)) ||
+	     CC(nested_cpu_has(vmcs12, CPU_BASED_RDTSC_EXITING)) ||
+	     CC(vmcs12->virtual_timer_vector > 255)))
+		return -EINVAL;
+
 	return 0;
 }
 
-- 
2.45.2