linux-kernel - Re: [PATCH] KVM: SVM: Do not terminate SEV-ES guests on GHCB validation failure

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Message-ID: <62090a4e-cb7d-437e-88f9-b5f97a175c38@amd.com>
Date:   Fri, 3 Dec 2021 16:46:14 -0600
From:   Tom Lendacky <thomas.lendacky@....com>
To:     Sean Christopherson <seanjc@...gle.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org, x86@...nel.org,
        Paolo Bonzini <pbonzini@...hat.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Ingo Molnar <mingo@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Brijesh Singh <brijesh.singh@....com>
Subject: Re: [PATCH] KVM: SVM: Do not terminate SEV-ES guests on GHCB
 validation failure

On 12/3/21 12:59 PM, Tom Lendacky wrote:
> On 12/3/21 10:39 AM, Sean Christopherson wrote:
>> On Thu, Dec 02, 2021, Tom Lendacky wrote:
> 

>>
>> IMO, this should be the patch (compile tested only).
> 
> I can test this, but probably won't be able to get to it until Monday.

I did manage to get some time to test this today. Works as expected with 
an invalid scratch GPA terminating the guest.

Up to Paolo now with what he would like to see/do.

Thanks,
Tom

>