linux-kernel - Re: [PATCH] x86/sev: Check whether SEV or SME is supported first

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Message-ID: <YLZGuTYXDin2K9wx@zn.tnic>
Date:   Tue, 1 Jun 2021 16:39:53 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Pu Wen <puwen@...on.cn>
Cc:     Joerg Roedel <jroedel@...e.de>,
        Sean Christopherson <seanjc@...gle.com>, x86@...nel.org,
        joro@...tes.org, thomas.lendacky@....com,
        dave.hansen@...ux.intel.com, peterz@...radead.org,
        tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
        sashal@...nel.org, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH] x86/sev: Check whether SEV or SME is supported first

On Mon, May 31, 2021 at 10:56:50PM +0800, Pu Wen wrote:
> Thanks for your suggestion, I'll try to set up early #GP handler to fix
> the problem.

Why? AFAICT, you only need to return early in sme_enable() if CPUID is
not "AuthenticAMD". Just do that please.

Thx.

-- 
Regards/Gruss,
    Boris.

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