Re: [PATCH] x86/coco, x86/sev: Use cpu_feature_enabled() to detect SEV guest flavor

[Borislav Petkov]

On Tue, Dec 05, 2023 at 05:37:38PM +0300, Kirill A. Shutemov wrote:
> The SEV code uses cc_platform_has() checks to detect the SEV flavor.
> However, these checks can sometimes produce false positives depending on
> the context.
> 
> For example, sev_map_percpu_data() uses CC_ATTR_GUEST_MEM_ENCRYPT to
> detect SEV guest, but this check will also pass for TDX guests.

Well, a function prefixed with "sev_" should check cc_vendor first...

-- 
Regards/Gruss,
    Boris.

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