From 27d80e0f8b8dff97503fc0061754b1d3800cb961 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Tue, 7 Jul 2026 19:19:55 +0200 Subject: [PATCH] cpufreq: intel_pstate: Set non-turbo capacity to HWP_GUARANTEED_PERF() 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: 929ebc93ccaa ("cpufreq: intel_pstate: Set asymmetric CPU capacity on hybrid systems") Signed-off-by: Rafael J. Wysocki Tested-by: Ricardo Neri Cc: All applicable Link: https://patch.msgid.link/12928972.O9o76ZdvQC@rafael.j.wysocki --- drivers/cpufreq/intel_pstate.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 5a0eeb84d382..6e984c114d96 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -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)