Re: [PATCH v5 13/19] KVM:VMX: Set up interception for CET MSRs

Chao Gao
2023-08-07T01:16:43Z

>> > + if (kvm_cpu_cap_has(X86_FEATURE_IBT)) {
>> > + incpt = !guest_can_use(vcpu, X86_FEATURE_IBT);
>> can you use guest_can_use() or guest_cpuid_has() consistently?
>Hmm, the inspiration actually came from Sean:
>Re: [RFC PATCH v2 3/6] KVM: x86: SVM: Pass through shadow stack MSRs - Sean Christopherson (kernel.org) <https://lore.kernel.org/all/ZMk14YiPw9l7ZTXP@google.com/>
>it would make the code more reasonable on non-CET platforms.

then, can you switch to use guest_cpuid_has() for IBT here as you do a few
lines above for the SHSTK? that's why I said "consistently".