linux-kernel - Re: [PATCH] x86/sev: Fix SEV check in sev_map_percpu

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Date: Tue, 2 Jan 2024 10:27:34 -0800 (PST)
From: David Rientjes <rientjes@...gle.com>
To: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
cc: Paolo Bonzini <pbonzini@...hat.com>, Wanpeng Li <wanpengli@...cent.com>, 
    Vitaly Kuznetsov <vkuznets@...hat.com>, 
    Sean Christopherson <seanjc@...gle.com>, 
    Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, 
    Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>, 
    Tom Lendacky <thomas.lendacky@....com>, x86@...nel.org, 
    kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86/sev: Fix SEV check in sev_map_percpu_data()

On Tue, 2 Jan 2024, Kirill A. Shutemov wrote:

> The function sev_map_percpu_data() checks if it is running on an SEV
> platform by checking the CC_ATTR_GUEST_MEM_ENCRYPT attribute. However,
> this attribute is also defined for TDX.
> 
> To avoid false positives, add a cc_vendor check.
> 
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>

Acked-by: David Rientjes <rientjes@...gle.com>