linux-kernel - Re: [tip: x86/fpu] x86/fpu: Deactivate FPU state after failure during state load

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Message-ID: <20200108114651.GF27363@zn.tnic>
Date:   Wed, 8 Jan 2020 12:46:51 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Andy Lutomirski <luto@...capital.net>
Cc:     linux-kernel@...r.kernel.org, linux-tip-commits@...r.kernel.org,
        Yu-cheng Yu <yu-cheng.yu@...el.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Borislav Petkov <bp@...e.de>,
        Andy Lutomirski <luto@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        "H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
        Jann Horn <jannh@...gle.com>,
        Peter Zijlstra <peterz@...radead.org>,
        "Ravi V. Shankar" <ravi.v.shankar@...el.com>,
        Rik van Riel <riel@...riel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Tony Luck <tony.luck@...el.com>, x86-ml <x86@...nel.org>
Subject: Re: [tip: x86/fpu] x86/fpu: Deactivate FPU state after failure
 during state load

On Tue, Jan 07, 2020 at 10:41:52AM -1000, Andy Lutomirski wrote:
> Wow, __fpu__restore_sig is a mess.

FWIW, I share your sentiment and I'd very much take patches which
simplify that flow. It is causing me headaches each time I have to look
at it.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette