Re: [RFC PATCH 36/41] KVM: x86/pmu: Intercept FIXED_CTR_CTRL MSR

From: Sean Christopherson
Date: Thu Apr 11 2024 - 17:56:51 EST


On Fri, Jan 26, 2024, Xiong Zhang wrote:
> From: Xiong Zhang <xiong.y.zhang@xxxxxxxxx>
>
> Fixed counters control MSR are still intercepted for the purpose of
> security, i.e., preventing guest from using unallowed Fixed Counter
> to steal information or take advantages of any CPU errata.

Same comments as earlier patches. Don't introduce bugs and then immediately fix
said bugs.