Messages in this thread | | | Date | Fri, 7 Jan 2022 19:15:43 +0100 | Subject | Re: [PATCH 2/2] KVM: x86: Forbid KVM_SET_CPUID{,2} after KVM_RUN | From | Paolo Bonzini <> |
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On 1/7/22 10:02, Vitaly Kuznetsov wrote: > > I'm again leaning towards an allowlist and currently I see only two > candidates: > > CPUID.01H.EBX bits 31:24 (initial LAPIC id) > CPUID.0BH.EDX (x2APIC id) > > Anything else I'm missing?
I would also ignore completely CPUID leaves 03H, 04H, 0BH, 80000005h, 80000006h, 8000001Dh, 8000001Eh (cache and processor topology), just to err on the safe side.
We could change kvm_find_cpuid_entry to WARN if any of those leaves are passed.
Paolo
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