linux-kernel - Re: [PATCH v7 035/102] KVM: x86/mmu: Explicitly check for MMIO spte in fast page fault

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Message-ID: <753184425e9d613841f4870a8a69f8cf96832f8d.camel@intel.com>
Date:   Wed, 13 Jul 2022 22:29:51 +1200
From:   Kai Huang <kai.huang@...el.com>
To:     Isaku Yamahata <isaku.yamahata@...il.com>
Cc:     isaku.yamahata@...el.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <sean.j.christopherson@...el.com>
Subject: Re: [PATCH v7 035/102] KVM: x86/mmu: Explicitly check for MMIO spte
 in fast page fault

> 
> Although it was needed, I noticed the following commit made this patch
> unnecessary.  So I'll drop this patch. Kudos to Sean.
> 
> edea7c4fc215c7ee1cc98363b016ad505cbac9f7
> "KVM: x86/mmu: Use a dedicated bit to track shadow/MMU-present SPTEs"
> 

Yes is_shadow_present_pte() always return false for MMIO so this patch isn't
needed anymore.