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Message-ID: <YQFaM7nOhD2d6SUQ@infradead.org>
Date: Wed, 28 Jul 2021 14:22:59 +0100
From: Christoph Hellwig <hch@...radead.org>
To: Tom Lendacky <thomas.lendacky@....com>
Cc: linux-kernel@...r.kernel.org, x86@...nel.org,
linuxppc-dev@...ts.ozlabs.org, linux-s390@...r.kernel.org,
iommu@...ts.linux-foundation.org, kvm@...r.kernel.org,
linux-efi@...r.kernel.org, platform-driver-x86@...r.kernel.org,
linux-graphics-maintainer@...are.com,
amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
kexec@...ts.infradead.org, linux-fsdevel@...r.kernel.org,
Andi Kleen <ak@...ux.intel.com>,
Tianyu Lan <Tianyu.Lan@...rosoft.com>,
Peter Zijlstra <peterz@...radead.org>,
Dave Hansen <dave.hansen@...ux.intel.com>,
Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
Andy Lutomirski <luto@...nel.org>,
Brijesh Singh <brijesh.singh@....com>,
Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 02/11] x86/sev: Add an x86 version of prot_guest_has()
On Tue, Jul 27, 2021 at 05:26:05PM -0500, Tom Lendacky via iommu wrote:
> Introduce an x86 version of the prot_guest_has() function. This will be
> used in the more generic x86 code to replace vendor specific calls like
> sev_active(), etc.
>
> While the name suggests this is intended mainly for guests, it will
> also be used for host memory encryption checks in place of sme_active().
>
> The amd_prot_guest_has() function does not use EXPORT_SYMBOL_GPL for the
> same reasons previously stated when changing sme_active(), sev_active and
None of that applies here as none of the callers get pulled into
random macros. The only case of that is sme_me_mask through
sme_mask, but that's not something this series replaces as far as I can
tell.
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