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Date: Tue, 17 Aug 2021 20:39:43 +0200
From: Borislav Petkov <bp@alien8.de>
Subject: Re: [PATCH v2 03/12] x86/sev: Add an x86 version of prot_guest_has()
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To: Tom Lendacky <thomas.lendacky@amd.com>
Cc: linux-kernel@vger.kernel.org, x86@kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, iommu@lists.linux-foundation.org, kvm@vger.kernel.org, linux-efi@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-graphics-maintainer@vmware.com, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, kexec@lists.infradead.org, linux-fsdevel@vger.kernel.org, Brijesh Singh <brijesh.singh@amd.com>, Joerg Roedel <joro@8bytes.org>, Andi Kleen <ak@linux.intel.com>, Sathyanarayanan Kuppuswamy <sathyanarayanan.kuppuswamy@linux.intel.com>, Tianyu Lan <Tianyu.Lan@microsoft.com>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, Dave Hansen <dave.hansen@linux.intel.com>, Andy Lutomirski <luto@kernel.org>, Peter Zijlstra <peterz@infradead.org>, Joerg Roedel <jroedel@suse.de>

On Tue, Aug 17, 2021 at 10:22:52AM -0500, Tom Lendacky wrote:
> I can change it to be an AMD/HYGON check...  although, I'll have to check
> to see if any (very) early use of the function will work with that.

We can always change it later if really needed. It is just that I'm not
a fan of such "preemptive" changes.

> At a minimum, the check in arch/x86/kernel/head64.c will have to be
> changed or removed. I'll take a closer look.

Yeah, sme_me_mask, already discussed on IRC.

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette

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