linux-kernel - Re: [RFC PATCH 22/23] x86/hreset: Configure history reset

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Message-ID: <20221002223413.GA17697@ranerica-svr.sc.intel.com>
Date:   Sun, 2 Oct 2022 15:34:13 -0700
From:   Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Ricardo Neri <ricardo.neri@...el.com>,
        "Ravi V. Shankar" <ravi.v.shankar@...el.com>,
        Ben Segall <bsegall@...gle.com>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Len Brown <len.brown@...el.com>, Mel Gorman <mgorman@...e.de>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        Valentin Schneider <vschneid@...hat.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org, "Tim C . Chen" <tim.c.chen@...el.com>
Subject: Re: [RFC PATCH 22/23] x86/hreset: Configure history reset

On Tue, Sep 27, 2022 at 02:03:59PM +0200, Peter Zijlstra wrote:
> On Fri, Sep 09, 2022 at 04:12:04PM -0700, Ricardo Neri wrote:
> 
> > +static u32 hardware_history_features __read_mostly;
> 
> __ro_after_init ?

Yes! You are correct. the HRESET features are only set once.

Thanks and BR,
Ricardo