From: Sean Christopherson <seanjc@xxxxxxxxxx>
Add MSR_IA32_XSS to list of MSRs reported to userspace if supported_xss
is non-zero, i.e. KVM supports at least one XSS based feature.
Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
Signed-off-by: Yang Weijiang <weijiang.yang@xxxxxxxxx>
---
arch/x86/kvm/x86.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index e0b55c043dab..1258d1d6dd52 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1464,6 +1464,7 @@ static const u32 msrs_to_save_base[] = {
MSR_IA32_UMWAIT_CONTROL,
MSR_IA32_XFD, MSR_IA32_XFD_ERR,
+ MSR_IA32_XSS,
};
static const u32 msrs_to_save_pmu[] = {
@@ -7195,6 +7196,10 @@ static void kvm_probe_msr_to_save(u32 msr_index)
if (!(kvm_get_arch_capabilities() & ARCH_CAP_TSX_CTRL_MSR))
return;
break;
+ case MSR_IA32_XSS:
+ if (!kvm_caps.supported_xss)
+ return;
+ break;
default:
break;
}
--
2.27.0
