linux-kernel - Re: [Patch V1 3/7] x86/microcode/core: Move microcode

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Message-ID: <Y45iM/jUjdYOPQrC@zn.tnic>
Date:   Mon, 5 Dec 2022 22:27:15 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Ashok Raj <ashok.raj@...el.com>
Cc:     X86-kernel <x86@...nel.org>,
        LKML Mailing List <linux-kernel@...r.kernel.org>,
        Dave Hansen <dave.hansen@...el.com>,
        Tony Luck <tony.luck@...el.com>, alison.schofield@...el.com,
        reinette.chatre@...el.com
Subject: Re: [Patch V1 3/7] x86/microcode/core: Move microcode_check() to
 cpu/microcode/core.c

On Mon, Dec 05, 2022 at 09:05:54AM -0800, Ashok Raj wrote:
> I was trying to move this similar to how x86_read_arch_cap_msr()
> moved from x86/kernel/cpu/cpu.h -> asm/cpu.h.

But that is only a function prototype - not the *actual* function.

> Keeping the usage local since there is just one caller to microcode_check()
> but there are other users of get_cpu_cap() like in
> arch/x86/xen/enlighten_pv.c which seems to be reaching out to
> ../kernel/cpu/cpu.h. 

Yah, that's the single use outside of kernel/cpu/. Looks like a hack to me. :)

But no worries, we will clean all that up sooner or later and
get_cpu_cap() will disappear someday soon hopefully.

> That said, what you say also makes sense. I'm fine with what you decide how
> this should look.

Yes pls.

Thx.

-- 
Regards/Gruss,
    Boris.

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