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Date: Wed, 31 Aug 2022 18:34:25 -0400 From: Yang Weijiang <weijiang.yang@...el.com> To: pbonzini@...hat.com, seanjc@...gle.com, kvm@...r.kernel.org Cc: like.xu.linux@...il.com, kan.liang@...ux.intel.com, wei.w.wang@...el.com, linux-kernel@...r.kernel.org Subject: [PATCH 02/15] KVM: x86: Report XSS as an MSR to be saved if there are supported features From: Sean Christopherson <sean.j.christopherson@...el.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 <sean.j.christopherson@...el.com> Signed-off-by: Yang Weijiang <weijiang.yang@...el.com> Message-Id: <20220517154100.29983-4-weijiang.yang@...el.com> Signed-off-by: Paolo Bonzini <pbonzini@...hat.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 d7374d768296..17663cade3fa 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1451,6 +1451,7 @@ static const u32 msrs_to_save_all[] = { MSR_F15H_PERF_CTR0, MSR_F15H_PERF_CTR1, MSR_F15H_PERF_CTR2, MSR_F15H_PERF_CTR3, MSR_F15H_PERF_CTR4, MSR_F15H_PERF_CTR5, MSR_IA32_XFD, MSR_IA32_XFD_ERR, + MSR_IA32_XSS, }; static u32 msrs_to_save[ARRAY_SIZE(msrs_to_save_all)]; @@ -6941,6 +6942,10 @@ static void kvm_init_msr_list(void) if (!kvm_cpu_cap_has(X86_FEATURE_XFD)) continue; break; + case MSR_IA32_XSS: + if (!kvm_caps.supported_xss) + continue; + break; default: break; } -- 2.27.0
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