Re: [PATCH v10 04/50] x86/cpufeatures: Add SEV-SNP CPU feature

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On 12/13/23 14:36, Borislav Petkov wrote:
Sure, I only queued it because you gave Acked-by for 05/50 and this is an
obvious dependency.  I would like to get things in as they are ready
(whenever it makes sense), so if you want to include those two in the x86
tree for 6.8, that would work for me.

It doesn't make sense to include them into 6.8 because the two alone are
simply dead code in 6.8.

Why are they dead code? X86_FEATURE_SEV_SNP is set automatically based on CPUID, therefore patch 5 is a performance improvement on all processors that support SEV-SNP. This is independent of whether KVM can create SEV-SNP guests or not.

If this is wrong, there is a problem in the commit messages.

Paolo

The plan is to put the x86 patches first in the next submission, I'll
pick them up for 6.9 and then give you an immutable branch to apply the
KVM bits ontop. This way it all goes together.





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