From: Viresh Kumar <viresh.kumar@linaro.org>
To: Sergio P <sergio.pieiga@gmail.com>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Cc: Linux PM list <linux-pm@vger.kernel.org>
Subject: Re: cpufreq and boost with amd ryzen
Date: Wed, 5 Jul 2017 09:47:58 +0530 [thread overview]
Message-ID: <20170705041758.GJ3532@vireshk-i7> (raw)
In-Reply-To: <CAFFvMK1FuCUWjOk_hv9W+zTqWcDT86qNbybRrzx989d1gfoZKw@mail.gmail.com>
+Rafael,
On 04-07-17, 16:38, Sergio P wrote:
> To be honest, I am not very familiar on how to debug the kernel.
>
> My guess would be that X86_FEATURE_CPB is not being detected correctly
> for Ryzen family in the CPUID registers, and it returns early from
> acpi_cpufreq_boost_init(). Also, CPB was a feature in earlier AMD
> processors, but now in the new Ryzen family, I'm not sure if it's
> called something else and perhaps defined in a different CPUID bit.
@Rafael: Do you have any idea about the new Ryzen family or how to get boost
working on them ?
--
viresh
next prev parent reply other threads:[~2017-07-05 4:18 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-02 14:34 cpufreq and boost with amd ryzen Sergio P
2017-07-03 4:25 ` Viresh Kumar
2017-07-03 11:21 ` Sergio P
2017-07-04 6:10 ` Viresh Kumar
2017-07-04 20:38 ` Sergio P
2017-07-05 4:17 ` Viresh Kumar [this message]
2017-07-05 11:01 ` Rafael J. Wysocki
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