linux-kernel - [PATCH 0/2] intel_pstate: fix turbo not being used after a processor is rebooted

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Message-ID: <20221221155203.11347-1-ptyadav@amazon.de>
Date:   Wed, 21 Dec 2022 16:52:01 +0100
From:   Pratyush Yadav <ptyadav@...zon.de>
To:     <linux-pm@...r.kernel.org>
CC:     Pratyush Yadav <ptyadav@...zon.de>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Robert Moore <robert.moore@...el.com>,
        <linux-acpi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <devel@...ica.org>
Subject: [PATCH 0/2] intel_pstate: fix turbo not being used after a processor is rebooted

When a processor is brought offline and online again, it is unable to
use Turbo mode because the _PSS table does not contain the whole turbo
frequency range, but only +1 MHz above the max non-turbo frequency. This
causes problems when ACPI processor driver tries to set frequency
constraints. See patch 2 for more details.

Pratyush Yadav (2):
  acpi: processor: allow fixing up the frequency for a performance state
  cpufreq: intel_pstate: use acpi perflib to update turbo frequency

 drivers/acpi/processor_perflib.c | 40 ++++++++++++++++++++++++++++++++
 drivers/cpufreq/intel_pstate.c   |  5 ++--
 include/acpi/processor.h         |  2 ++
 3 files changed, 45 insertions(+), 2 deletions(-)

--
2.38.1