linux-kernel - tools/power/x86/intel-speed-select: Fixes for regression

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Message-Id: <20201221071859.2783957-1-srinivas.pandruvada@linux.intel.com>
Date:   Sun, 20 Dec 2020 23:18:57 -0800
From:   Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
To:     hdegoede@...hat.com, mgross@...ux.intel.com
Cc:     platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
Subject: tools/power/x86/intel-speed-select: Fixes for regression

One side-effect of fixing the scaling frequency limits using the
commit eacc9c5a927e ("cpufreq: intel_pstate: Fix intel_pstate_get_hwp_max()
for turbo disabled") causes stale HWP_CAP.GUARANTEED to be used as max.
Without processing HWP interrupts, user space needs to be able to update
a new max while Intel SST is in use. This is not a problem as the
change of guaranteed is caused by user space action, so user space knows
that guarantee will change.

This series causes user space to trigger scaling_max_freq update with
the new base_frequency.

Srinivas Pandruvada (2):
  tools/power/x86/intel-speed-select: Set scaling_max_freq to
    base_frequency
  tools/power/x86/intel-speed-select: Set higher of cpuinfo_max_freq or
    base_frequency

 .../x86/intel-speed-select/isst-config.c      | 32 +++++++++++++++++++
 1 file changed, 32 insertions(+)

-- 
2.29.2