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| author | Doug Smythies <dsmythies@telus.net> | 2024-02-18 00:30:10 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-03-06 17:48:34 +0300 |
| commit | 1a868273760040b746518aca7fea4f8c07366884 (patch) | |
| tree | 548ff9988b8ca54d4078e3fc6aa78482990b9bd4 /drivers/cpufreq | |
| parent | 7322b217c6f037adf00b29e4bcc202c5b54b6dde (diff) | |
| download | linux-1a868273760040b746518aca7fea4f8c07366884.tar.xz | |
cpufreq: intel_pstate: fix pstate limits enforcement for adjust_perf call back
[ Upstream commit f0a0fc10abb062d122db5ac4ed42f6d1ca342649 ]
There is a loophole in pstate limit clamping for the intel_cpufreq CPU
frequency scaling driver (intel_pstate in passive mode), schedutil CPU
frequency scaling governor, HWP (HardWare Pstate) control enabled, when
the adjust_perf call back path is used.
Fix it.
Fixes: a365ab6b9dfb cpufreq: intel_pstate: Implement the ->adjust_perf() callback
Signed-off-by: Doug Smythies <dsmythies@telus.net>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/cpufreq')
| -rw-r--r-- | drivers/cpufreq/intel_pstate.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index c352a593e5d8..586a58d761bb 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -2987,6 +2987,9 @@ static void intel_cpufreq_adjust_perf(unsigned int cpunum, if (min_pstate < cpu->min_perf_ratio) min_pstate = cpu->min_perf_ratio; + if (min_pstate > cpu->max_perf_ratio) + min_pstate = cpu->max_perf_ratio; + max_pstate = min(cap_pstate, cpu->max_perf_ratio); if (max_pstate < min_pstate) max_pstate = min_pstate; |