[PATCH v5 16/20] KVM: x86: Add APX in supported XCR0

[Chang S. Bae]

Set kvm_caps.supported_xcr0[APX] when the host has enabled the APX state
along with CONFIG_KVM_APX=y.

Signed-off-by: Chang S. Bae <chang.seok.bae@xxxxxxxxx>
---
V4 -> V5: Separate out from userspace exposure (Sean)
---
 arch/x86/kvm/x86.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 266d7a02855b..48f8a2d69987 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -7082,6 +7082,8 @@ int kvm_x86_vendor_init(struct kvm_x86_init_ops *ops)
 	if (boot_cpu_has(X86_FEATURE_XSAVE)) {
 		kvm_host.xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK);
 		kvm_caps.supported_xcr0 = kvm_host.xcr0 & KVM_SUPPORTED_XCR0;
+		if (IS_ENABLED(CONFIG_KVM_APX))
+			kvm_caps.supported_xcr0 |= kvm_host.xcr0 & XFEATURE_MASK_APX;
 	}
 
 	if (boot_cpu_has(X86_FEATURE_XSAVES)) {
-- 
2.53.0