linux-kernel - Re: [PATCH 2/6] KVM: VMX: remove bogus check for invalid EPT violation

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Date:   Wed, 12 Apr 2017 22:00:32 +0200
From:   David Hildenbrand <david@...hat.com>
To:     Paolo Bonzini <pbonzini@...hat.com>, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org
Subject: Re: [PATCH 2/6] KVM: VMX: remove bogus check for invalid EPT
 violation

On 30.03.2017 11:55, Paolo Bonzini wrote:
> handle_ept_violation is checking for "guest-linear-address invalid" +
> "not a paging-structure walk".  However, _all_ EPT violations without
> a valid guest linear address are paging structure walks, because those
> EPT violations happen when loading the guest PDPTEs.
> 
> Therefore, the check can never be true, and even if it were, KVM doesn't
> care about the guest linear address; it only uses the guest *physical*
> address VMCS field.  So, remove the check altogether.
> 
> Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>

Reviewed-by: David Hildenbrand <david@...hat.com>

-- 

Thanks,

David