Re: [PATCH] kvm: vmx: Validate INVPCID bit in the CPUID supplied to the guest

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Subject: Re: [PATCH] kvm: vmx: Validate INVPCID bit in the CPUID supplied to the guest
From: Jim Mattson <jmattson@xxxxxxxxxx>
Date: Thu, 26 Apr 2018 16:16:11 -0700
Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>, kvm list <kvm@xxxxxxxxxxxxxxx>, Andres Lagar-Cavilla <andreslc@xxxxxxxxxx>
In-reply-to: <20180426224332.36626-1-junaids@google.com>
References: <20180426224332.36626-1-junaids@google.com>

On Thu, Apr 26, 2018 at 3:43 PM, Junaid Shahid <junaids@xxxxxxxxxx> wrote:
> When INVPCID is not supported, KVM should clear the INVPCID bit from the
> guest CPUID.

This seems to be the only guest CPUID bit that's verified in this way.
That seems...odd. Why enforce this one constraint?

Follow-Ups:
- Re: [PATCH] kvm: vmx: Validate INVPCID bit in the CPUID supplied to the guest
  - From: Junaid Shahid

References:
- [PATCH] kvm: vmx: Validate INVPCID bit in the CPUID supplied to the guest
  - From: Junaid Shahid

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