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    SubjectRe: [PATCH v14 09/13] KVM: x86: Report CET MSRs as to-be-saved if CET is supported
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    Date
    On 06/11/20 02:16, Yang Weijiang wrote:
    > Report all CET MSRs, including the synthetic GUEST_SSP MSR, as
    > to-be-saved, e.g. for migration, if CET is supported by KVM.
    >
    > Co-developed-by: Sean Christopherson <sean.j.christopherson@intel.com>
    > Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
    > Signed-off-by: Yang Weijiang <weijiang.yang@intel.com>
    > ---
    > arch/x86/kvm/x86.c | 9 +++++++++
    > 1 file changed, 9 insertions(+)
    >
    > diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
    > index 751b62e871e5..d573cadf5baf 100644
    > --- a/arch/x86/kvm/x86.c
    > +++ b/arch/x86/kvm/x86.c
    > @@ -1248,6 +1248,8 @@ static const u32 msrs_to_save_all[] = {
    > MSR_ARCH_PERFMON_EVENTSEL0 + 16, MSR_ARCH_PERFMON_EVENTSEL0 + 17,
    >
    > MSR_IA32_XSS,
    > + MSR_IA32_U_CET, MSR_IA32_S_CET, MSR_IA32_INT_SSP_TAB, MSR_KVM_GUEST_SSP,
    > + MSR_IA32_PL0_SSP, MSR_IA32_PL1_SSP, MSR_IA32_PL2_SSP, MSR_IA32_PL3_SSP,
    > };
    >
    > static u32 msrs_to_save[ARRAY_SIZE(msrs_to_save_all)];
    > @@ -5761,6 +5763,13 @@ static void kvm_init_msr_list(void)
    > if (!supported_xss)
    > continue;
    > break;
    > + case MSR_IA32_U_CET:
    > + case MSR_IA32_S_CET:
    > + case MSR_IA32_INT_SSP_TAB:
    > + case MSR_IA32_PL0_SSP ... MSR_IA32_PL3_SSP:
    > + if (!kvm_cet_supported())
    > + continue;
    > + break;
    > default:
    > break;
    > }
    >

    Missing "case MSR_KVM_GUEST_SSP".

    Paolo

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