linux-kernel - Re: [PATCH] cpufreq: acpi: Only set boost MSRs on supported CPUs

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Message-ID: <CAJZ5v0gfVgUOqJxyxDuNhNAhZoi3ODZBeUL_iz0o5eA+ZgfQng@mail.gmail.com>
Date:   Tue, 6 Dec 2022 12:17:54 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Borislav Petkov <bp@...en8.de>,
        stuart hayes <stuart.w.hayes@...il.com>
Cc:     Viresh Kumar <viresh.kumar@...aro.org>,
        Kyle Meyer <kyle.meyer@....com>, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] cpufreq: acpi: Only set boost MSRs on supported CPUs

On Tue, Dec 6, 2022 at 11:20 AM Borislav Petkov <bp@...en8.de> wrote:
>
> On Mon, Dec 05, 2022 at 12:07:05PM -0600, stuart hayes wrote:
> >
> >
> > On 12/5/2022 11:57 AM, Stuart Hayes wrote:
> > > Stop trying to set boost MSRs on CPUs that don't support boost.
> > >
> > > This corrects a bug in the recent patch "Defer setting boost MSRs".
> > >
> > > Signed-off-by: Stuart Hayes <stuart.w.hayes@...il.com>
> > > ---
> > >   drivers/cpufreq/acpi-cpufreq.c | 3 ++-
> > >   1 file changed, 2 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
> > > index bb58175a8d40..a7c5e312340e 100644
> > > --- a/drivers/cpufreq/acpi-cpufreq.c
> > > +++ b/drivers/cpufreq/acpi-cpufreq.c
> > > @@ -888,7 +888,8 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
> > >     if (perf->states[0].core_frequency * 1000 != freq_table[0].frequency)
> > >             pr_warn(FW_WARN "P-state 0 is not max freq\n");
> > > -   set_boost(policy, acpi_cpufreq_driver.boost_enabled);
> > > +   if (acpi_cpufreq_driver.set_boost)
> > > +           set_boost(policy, acpi_cpufreq_driver.boost_enabled);
> > >     return result;
> >
> > My apologies--adding Boris, I forgot to put him on the "to" list.
>
> Yap, that does it.
>
> Reported-by: Borislav Petkov (AMD) <bp@...en8.de>
> Tested-by: Borislav Petkov (AMD) <bp@...en8.de>

OK, applied, thanks!