linux-kernel - Re: [PATCH] x86/cpufeatures: make bits in cpu_caps_cleared[] and cpu_cpus

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Message-ID: <20200318103219.GA4377@zn.tnic>
Date:   Wed, 18 Mar 2020 11:32:19 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Xiaoyao Li <xiaoyao.li@...el.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86/cpufeatures: make bits in cpu_caps_cleared[] and
 cpu_cpus_set[] exclusive

On Wed, Mar 18, 2020 at 02:16:24PM +0800, Xiaoyao Li wrote:
> In apply_forced_caps(), cpu_caps_set[] overrides cpu_caps_cleared[], so
> that setup_clear_cpu_cap() cannot clear one cap if setup_force_cpu_cap()
> sets the cap before it.

Context pls: what is the observation, what are you trying to do,
reproducer, etc?

Thx.

-- 
Regards/Gruss,
    Boris.

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