diff options
| author | Wei Huang <wei.huang2@amd.com> | 2020-10-18 22:57:41 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-11-10 10:22:15 +0100 |
| commit | aec3d9d432d9aac82e3dab4cdd5cc7314601f2a8 (patch) | |
| tree | 3c84ae7ab04c07a5917fc1238593bcd64961edeb /drivers/cpufreq | |
| parent | fa0562e23c438f2616aed8174ae05bcdc255389a (diff) | |
acpi-cpufreq: Honor _PSD table setting on new AMD CPUs
commit 5368512abe08a28525d9b24abbfc2a72493e8dba upstream.
acpi-cpufreq has a old quirk that overrides the _PSD table supplied by
BIOS on AMD CPUs. However the _PSD table of new AMD CPUs (Family 19h+)
now accurately reports the P-state dependency of CPU cores. Hence this
quirk needs to be fixed in order to support new CPUs' frequency control.
Fixes: acd316248205 ("acpi-cpufreq: Add quirk to disable _PSD usage on all AMD CPUs")
Signed-off-by: Wei Huang <wei.huang2@amd.com>
[ rjw: Subject edit ]
Cc: 3.10+ <stable@vger.kernel.org> # 3.10+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/cpufreq')
| -rw-r--r-- | drivers/cpufreq/acpi-cpufreq.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c index c2598381fbc8..9738244a18dd 100644 --- a/drivers/cpufreq/acpi-cpufreq.c +++ b/drivers/cpufreq/acpi-cpufreq.c @@ -713,7 +713,8 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy) cpumask_copy(policy->cpus, topology_core_cpumask(cpu)); } - if (check_amd_hwpstate_cpu(cpu) && !acpi_pstate_strict) { + if (check_amd_hwpstate_cpu(cpu) && boot_cpu_data.x86 < 0x19 && + !acpi_pstate_strict) { cpumask_clear(policy->cpus); cpumask_set_cpu(cpu, policy->cpus); cpumask_copy(data->freqdomain_cpus, |