linux-kernel - Re: [PATCH] x86/tsx: Use MSR_TSX

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Message-ID: <20220216190342.fzbwof5s3x64ln4u@guptapa-mobl1.amr.corp.intel.com>
Date:   Wed, 16 Feb 2022 11:03:42 -0800
From:   Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     Andrew Cooper <Andrew.Cooper3@...rix.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "x86@...nel.org" <x86@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>, Andi Kleen <ak@...ux.intel.com>,
        Tony Luck <tony.luck@...el.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "antonio.gomez.iglesias@...ux.intel.com" 
        <antonio.gomez.iglesias@...ux.intel.com>,
        "neelima.krishnan@...el.com" <neelima.krishnan@...el.com>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Subject: Re: [PATCH] x86/tsx: Use MSR_TSX_CTRL to clear CPUID bits

On 16.02.2022 11:30, Borislav Petkov wrote:
>On Tue, Feb 15, 2022 at 10:08:26PM -0800, Pawan Gupta wrote:
>> Alternatively, we can reset RTM_ALLOW,
>
>I'd vote for that. Considering how plagued TSX is, I'm sceptical anyone
>would be interested in doing development with it so we can reset it for
>now and allow enabling it later if there's an actual use case for it...

Okay, I will add RTM_ALLOW reset logic in the next revision.

Thanks,
Pawan