Re: [PATCH] KVM: x86: fix overlap between SPTE_MMIO_MASK and generation

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Subject: Re: [PATCH] KVM: x86: fix overlap between SPTE_MMIO_MASK and generation
From: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Date: Wed, 22 Jan 2020 15:35:36 +0100
Cc: linux-kernel@xxxxxxxxxxxxxxx, kvm@xxxxxxxxxxxxxxx, Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
In-reply-to: <CANgfPd8fq7pWe00fKm7QEiOAVFuubSQ-jJxEM1sCKzqJk9rSzw@mail.gmail.com>
References: <1579623061-47141-1-git-send-email-pbonzini@redhat.com> <CANgfPd8fq7pWe00fKm7QEiOAVFuubSQ-jJxEM1sCKzqJk9rSzw@mail.gmail.com>
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.1

On 21/01/20 18:24, Ben Gardon wrote:
> BUILD_BUG_ON((MMIO_SPTE_GEN_HIGH_MASK |
> MMIO_SPTE_GEN_LOW_MASK) & SPTE_SPECIAL_MASK)
> 

Yes, this is a better assertion.  I've replaced it in the patch.

Paolo

References:
- [PATCH] KVM: x86: fix overlap between SPTE_MMIO_MASK and generation
  - From: Paolo Bonzini
- Re: [PATCH] KVM: x86: fix overlap between SPTE_MMIO_MASK and generation
  - From: Ben Gardon

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