linux-kernel - Re: [PATCH 8/9] KVM: SVM: Use KVM-governed features to track SHSTK

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Message-ID: <963fbc8076172bd430621446070cfd6ca8f165b8.camel@redhat.com>
Date:   Thu, 02 Nov 2023 20:07:35 +0200
From:   Maxim Levitsky <mlevitsk@...hat.com>
To:     John Allen <john.allen@....com>, kvm@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, pbonzini@...hat.com,
        weijiang.yang@...el.com, rick.p.edgecombe@...el.com,
        seanjc@...gle.com, x86@...nel.org, thomas.lendacky@....com,
        bp@...en8.de
Subject: Re: [PATCH 8/9] KVM: SVM: Use KVM-governed features to track SHSTK

On Tue, 2023-10-10 at 20:02 +0000, John Allen wrote:
> Use the KVM-governed features framework to track whether SHSTK can be by
> both userspace and guest for SVM.
> 
> Signed-off-by: John Allen <john.allen@....com>
> ---
>  arch/x86/kvm/svm/svm.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
> index ee7c7d0a09ab..00a8cef3cbb8 100644
> --- a/arch/x86/kvm/svm/svm.c
> +++ b/arch/x86/kvm/svm/svm.c
> @@ -4366,6 +4366,7 @@ static void svm_vcpu_after_set_cpuid(struct kvm_vcpu *vcpu)
>  	kvm_governed_feature_check_and_set(vcpu, X86_FEATURE_PFTHRESHOLD);
>  	kvm_governed_feature_check_and_set(vcpu, X86_FEATURE_VGIF);
>  	kvm_governed_feature_check_and_set(vcpu, X86_FEATURE_VNMI);
> +	kvm_governed_feature_check_and_set(vcpu, X86_FEATURE_SHSTK);
>  
>  	svm_recalc_instruction_intercepts(vcpu, svm);
>  

Reviewed-by: Maxim Levitsky <mlevitsk@...hat.com>

Best regards,
	Maxim Levitsky