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cpufreq: intel_pstate: Update asym capacity for CPUs that were offline initially

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Commit 929ebc93cc ("cpufreq: intel_pstate: Set asymmetric CPU
capacity on hybrid systems") overlooked a corner case in which some
CPUs may be offline to start with and brought back online later,
after the intel_pstate driver has been registered, so their asymmetric
capacity will not be set.

Address this by calling hybrid_update_capacity() in the CPU
initialization path that is executed instead of the online path
for those CPUs.

Note that this asymmetric capacity update will be skipped during
driver initialization and mode switches because hybrid_max_perf_cpu
is NULL in those cases.

Fixes: 929ebc93cc ("cpufreq: intel_pstate: Set asymmetric CPU capacity on hybrid systems")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/1913414.tdWV9SEqCh@rjwysocki.net
This commit is contained in:
Rafael J. Wysocki 2024-11-04 19:53:53 +01:00
parent a97e293e07
commit 92447aa5f6
1 changed files with 5 additions and 0 deletions
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5
drivers/cpufreq/intel_pstate.c
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@ -2275,6 +2275,11 @@ static void intel_pstate_get_cpu_pstates(struct cpudata *cpu)
} else {
cpu->pstate.scaling = perf_ctl_scaling;
}
/*
* If the CPU is going online for the first time and it was
* offline initially, asym capacity scaling needs to be updated.
*/
hybrid_update_capacity(cpu);
} else {
cpu->pstate.scaling = perf_ctl_scaling;
cpu->pstate.max_pstate = pstate_funcs.get_max(cpu->cpu);