linux-kernel - Re: [PATCH v3 08/10] x86/setcpuid: Add kernel option setcpuid

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Message-ID: <20190204195704.GJ29639@zn.tnic>
Date:   Mon, 4 Feb 2019 20:57:04 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Dave Hansen <dave.hansen@...el.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Ingo Molnar <mingo@...hat.com>, H Peter Anvin <hpa@...or.com>,
        Ashok Raj <ashok.raj@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Michael Chan <michael.chan@...adcom.com>,
        Ravi V Shankar <ravi.v.shankar@...el.com>,
        Ricardo Neri <ricardo.neri@...el.com>,
        linux-kernel <linux-kernel@...r.kernel.org>, x86 <x86@...nel.org>
Subject: Re: [PATCH v3 08/10] x86/setcpuid: Add kernel option setcpuid

On Mon, Feb 04, 2019 at 11:05:52AM -0800, Dave Hansen wrote:
> But, we're not being very persuasive because we kinda forgot about the
> "if and only if" condition that you mentioned.

But why does it have to be a cmdline parameter instead of
being an automatic thing which sets the proper bits in
arch/x86/kernel/cpu/intel.c based on f/m/s or MSR or whatever ?

-- 
Regards/Gruss,
    Boris.

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