Messages in this thread | | | Date | Mon, 6 Mar 2023 22:25:29 +0100 | Subject | Re: [PATCH 0/2] KVM: x86: Propagate AMD-specific IBRS bits to guests | From | Paolo Bonzini <> |
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On 3/6/23 22:16, Sean Christopherson wrote: >> Not harmless - cpufeatures.h should contain flags which the kernel uses >> and not*every* CPUID bit out there. > > I thought that the consensus was that adding unused-by-the-kernel flags to > cpufeatures.h is ok so long as the feature is hidden from /proc/cpuinfo and the > kernel already dedicates a word to the CPUID leaf? Yeah, I understand adding no new CPUID leaf just for KVM, but you don't gain anything really from not having X86_FEATURE_* defines.
Paolo
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