linux-kernel - Re: [PATCH v3 02/37] KVM: nVMX: Validate the EPTP when emulating INVEPT(EXTENT

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Message-ID: <b6fdc5db-2d50-5e4d-cfe8-4d4624c046e0@redhat.com>
Date:   Tue, 24 Mar 2020 00:46:53 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Sean Christopherson <sean.j.christopherson@...el.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>
Cc:     Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Ben Gardon <bgardon@...gle.com>,
        Junaid Shahid <junaids@...gle.com>,
        Liran Alon <liran.alon@...cle.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        John Haxby <john.haxby@...cle.com>,
        Miaohe Lin <linmiaohe@...wei.com>,
        Tom Lendacky <thomas.lendacky@....com>
Subject: Re: [PATCH v3 02/37] KVM: nVMX: Validate the EPTP when emulating
 INVEPT(EXTENT_CONTEXT)

On 23/03/20 16:45, Sean Christopherson wrote:
>> My question, however, transforms into "would it
>> make sense to introduce nested_vmx_fail() implementing the logic from
>> SDM:
>>
>> VMfail(ErrorNumber):
>> 	IF VMCS pointer is valid
>> 		THEN VMfailValid(ErrorNumber);
>> 	ELSE VMfailInvalid;
>> 	FI;
>>
> Hmm, I wouldn't be opposed to such a wrapper.  It would pair with
> nested_vmx_succeed().
> 

Neither would I.

Paolo