qiurui/Centos-kernel-stream-10
1
0
Fork 0
mirror of https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-10.git synced 2026-09-09 00:07:04 +08:00
Code Issues Packages Projects Releases Wiki Activity

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

Browse Source 
JIRA: https://redhat.atlassian.net/browse/RHEL-212894

commit 27d80e0f8b8dff97503fc0061754b1d3800cb961
Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Date:   Tue Jul 7 19:19:55 2026 +0200

    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: 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

Signed-off-by: Steve Best <sbest@redhat.com>
This commit is contained in:
Steve Best
2026-07-21 09:19:02 -04:00
parent d0cac83ece
commit c32e06f28c
1 changed files with 4 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/cpufreq/intel_pstate.c
+4 -2
View File
@@ -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)