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cpufreq: intel_pstate: Set non-turbo capacity to HWP_GUARANTEED_PERF()

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Setting cpu->capacity_perf to cpu->pstate.max_pstate_physical in the
"no turbo" case is inconsistent with what happens elsewhere in the
driver and causes arch_scale_cpu_capacity() to be incorrect.  It also
skews arch_scale_freq_capacity() which ends up differing from 1024 for
the guaranteed P-state.

Address that by setting capacity_perf to HWP_GUARANTEED_PERF() in the
"no turbo" case.

Fixes: 929ebc93cc ("cpufreq: intel_pstate: Set asymmetric CPU capacity on hybrid systems")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Cc: All applicable <stable@vger.kernel.org>
Link: https://patch.msgid.link/12928972.O9o76ZdvQC@rafael.j.wysocki
This commit is contained in:
Rafael J. Wysocki 2026-07-07 19:19:55 +02:00
parent 8cdeaa50ea
commit 27d80e0f8b
1 changed files with 4 additions and 2 deletions
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6
drivers/cpufreq/intel_pstate.c
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@ -1058,12 +1058,14 @@ static void hybrid_clear_cpu_capacity(unsigned int cpunum)
static void hybrid_get_capacity_perf(struct cpudata *cpu)
{
u64 hwp_cap = READ_ONCE(cpu->hwp_cap_cached);
if (READ_ONCE(global.no_turbo)) {
cpu->capacity_perf = cpu->pstate.max_pstate_physical;
cpu->capacity_perf = HWP_GUARANTEED_PERF(hwp_cap);
return;
}
cpu->capacity_perf = HWP_HIGHEST_PERF(READ_ONCE(cpu->hwp_cap_cached));
cpu->capacity_perf = HWP_HIGHEST_PERF(hwp_cap);
}
static void hybrid_set_capacity_of_cpus(void)