linux-kernel - Re: [PATCH 2/2] x86/sev: Get rid of special sev_es_enable

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Date:   Thu, 23 Mar 2023 10:17:15 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Borislav Petkov <bp@...en8.de>, Joerg Roedel <joro@...tes.org>,
        Tom Lendacky <thomas.lendacky@....com>
Cc:     X86 ML <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] x86/sev: Get rid of special sev_es_enable_key

On Sat, Mar 18 2023 at 12:56, Borislav Petkov wrote:
> -bool cc_platform_has(enum cc_attr attr)
> +bool noinstr cc_platform_has(enum cc_attr attr)

That's not sufficient. This function invokes static functions which the
compiler can rightfully put out of line resulting in a noinstr violation.

Thanks,

        tglx