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Date:   Tue, 1 Sep 2020 14:09:56 +0200
From:   Joerg Roedel <joro@8bytes.org>
To:     Borislav Petkov <bp@alien8.de>
Cc:     x86@kernel.org, Joerg Roedel <jroedel@suse.de>,
        Kees Cook <keescook@chromium.org>, hpa@zytor.com,
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Subject: Re: [PATCH v6 31/76] x86/head/64: Setup MSR_GS_BASE before calling
 into C code
Message-ID: <20200901120956.GA22385@8bytes.org>
References: <20200824085511.7553-1-joro@8bytes.org>
 <20200824085511.7553-32-joro@8bytes.org>
 <20200828181346.GB19342@zn.tnic>
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On Fri, Aug 28, 2020 at 08:13:46PM +0200, Borislav Petkov wrote:
> On Mon, Aug 24, 2020 at 10:54:26AM +0200, Joerg Roedel wrote:
> > +	movl	$MSR_GS_BASE,%ecx
> 
> I'm confused: is this missing those three lines:
> 
>         movl    initial_gs(%rip),%eax
>         movl    initial_gs+4(%rip),%edx
>         wrmsr
> 
> as it is done in secondary_startup_64 ?

No, it is a leftover from before I moved the MSR write into
startup_64_setup_env(). I removed it, thanks for catching this.

Regards,

	Joerg