[RFC PATCH 04/18] KVM: VMX: add cpu_has_vmx_mbec helper

[Jon Kohler]

From: Mickaël Salaün <mic@xxxxxxxxxxx>

Add 'cpu_has_vmx_mbec' helper to determine whether the cpu based VMCS
from hardware has Intel Mode Based Execution Control exposed, which is
secondary execution control bit 22.

Signed-off-by: Mickaël Salaün <mic@xxxxxxxxxxx>
Co-developed-by: Jon Kohler <jon@xxxxxxxxxxx>
Signed-off-by: Jon Kohler <jon@xxxxxxxxxxx>

---
 arch/x86/kvm/vmx/capabilities.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/x86/kvm/vmx/capabilities.h b/arch/x86/kvm/vmx/capabilities.h
index cb6588238f46..f83592272920 100644
--- a/arch/x86/kvm/vmx/capabilities.h
+++ b/arch/x86/kvm/vmx/capabilities.h
@@ -253,6 +253,12 @@ static inline bool cpu_has_vmx_xsaves(void)
 		SECONDARY_EXEC_ENABLE_XSAVES;
 }
 
+static inline bool cpu_has_vmx_mbec(void)
+{
+	return vmcs_config.cpu_based_2nd_exec_ctrl &
+		SECONDARY_EXEC_MODE_BASED_EPT_EXEC;
+}
+
 static inline bool cpu_has_vmx_waitpkg(void)
 {
 	return vmcs_config.cpu_based_2nd_exec_ctrl &
-- 
2.43.0