From: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
Add MSR_IA32_XSS to the 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 <sean.j.christopherson@xxxxxxxxx>
Signed-off-by: Yang Weijiang <weijiang.yang@xxxxxxxxx>
Message-Id: <20210203113421.5759-2-weijiang.yang@xxxxxxxxx>
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
---
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 08a58ef8bec2..2ebb05212652 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1328,6 +1328,7 @@ static const u32 msrs_to_save_all[] = {
MSR_ARCH_PERFMON_EVENTSEL0 + 14, MSR_ARCH_PERFMON_EVENTSEL0 + 15,
MSR_ARCH_PERFMON_EVENTSEL0 + 16, MSR_ARCH_PERFMON_EVENTSEL0 + 17,
MSR_ARCH_LBR_CTL, MSR_ARCH_LBR_DEPTH,
+ MSR_IA32_XSS,
};
static u32 msrs_to_save[ARRAY_SIZE(msrs_to_save_all)];
@@ -6238,6 +6239,10 @@ static void kvm_init_msr_list(void)
if (!kvm_cpu_cap_has(X86_FEATURE_ARCH_LBR))
continue;
break;
+ case MSR_IA32_XSS:
+ if (!supported_xss)
+ continue;
+ break;
default:
break;
}
--
2.25.1
