diff mbox series

[RFC,v3,8/8] KVM: SVM: Add CET features to supported_xss

Message ID 20230817181820.15315-9-john.allen@amd.com (mailing list archive)
State New, archived
Headers show
Series SVM guest shadow stack support | expand

Commit Message

John Allen Aug. 17, 2023, 6:18 p.m. UTC 
If the CPU supports CET, add CET XSAVES feature bits to the
supported_xss mask.

Signed-off-by: John Allen <john.allen@amd.com>
---
v2:
  - Remove curly braces around if statement
---
 arch/x86/kvm/svm/svm.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 683bf18b965d..685f8715a716 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -5105,6 +5105,10 @@  static __init void svm_set_cpu_caps(void)
 	    boot_cpu_has(X86_FEATURE_AMD_SSBD))
 		kvm_cpu_cap_set(X86_FEATURE_VIRT_SSBD);
 
+	if (kvm_cpu_cap_has(X86_FEATURE_SHSTK))
+		kvm_caps.supported_xss |= XFEATURE_MASK_CET_USER |
+					  XFEATURE_MASK_CET_KERNEL;
+
 	if (enable_pmu) {
 		/*
 		 * Enumerate support for PERFCTR_CORE if and only if KVM has