linux-kernel - Re: [PATCH v2 09/14] KVM: SVM: Unconditionally invoke sev_hardware

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Message-ID: <a0ce54d2-7fc1-0357-26a4-e2bbba417699@amd.com>
Date:   Thu, 14 Jan 2021 15:26:45 -0600
From:   Tom Lendacky <thomas.lendacky@....com>
To:     Sean Christopherson <seanjc@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>
Cc:     Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Borislav Petkov <bp@...e.de>,
        Brijesh Singh <brijesh.singh@....com>
Subject: Re: [PATCH v2 09/14] KVM: SVM: Unconditionally invoke
 sev_hardware_teardown()

On 1/13/21 6:37 PM, Sean Christopherson wrote:
> Remove the redundant svm_sev_enabled() check when calling
> sev_hardware_teardown(), the teardown helper itself does the check.
> Removing the check from svm.c will eventually allow dropping
> svm_sev_enabled() entirely.
> 
> No functional change intended.
> 
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>

Reviewed-by: Tom Lendacky <thomas.lendacky@....com>

> ---
>   arch/x86/kvm/svm/svm.c | 3 +--
>   1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
> index f89f702b2a58..bb7b99743bea 100644
> --- a/arch/x86/kvm/svm/svm.c
> +++ b/arch/x86/kvm/svm/svm.c
> @@ -887,8 +887,7 @@ static void svm_hardware_teardown(void)
>   {
>   	int cpu;
>   
> -	if (svm_sev_enabled())
> -		sev_hardware_teardown();
> +	sev_hardware_teardown();
>   
>   	for_each_possible_cpu(cpu)
>   		svm_cpu_uninit(cpu);
>