Messages in this thread Patch in this message | | | From | Yang Weijiang <> | Subject | [PATCH v5 03/19] KVM:x86: Report XSS as to-be-saved if there are supported features | Date | Thu, 3 Aug 2023 00:27:16 -0400 |
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From: Sean Christopherson <seanjc@google.com>
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 <seanjc@google.com> Signed-off-by: Yang Weijiang <weijiang.yang@intel.com> --- 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 a6b9bea62fb8..0b9033551d8c 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1451,6 +1451,7 @@ 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[] = { @@ -7172,6 +7173,10 @@ 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
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