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authorWei Huang <wei.huang2@amd.com>2020-10-19 06:57:41 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2020-10-19 18:28:43 +0300
commit5368512abe08a28525d9b24abbfc2a72493e8dba (patch)
treec3a881094bc0a242c34f086418392fe609768c1a /drivers/cpufreq/acpi-cpufreq.c
parentcdc1719cd885ef490e30c14c01a6e7fee42bf2e2 (diff)
downloadlinux-5368512abe08a28525d9b24abbfc2a72493e8dba.tar.xz
acpi-cpufreq: Honor _PSD table setting on new AMD CPUs
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>
Diffstat (limited to 'drivers/cpufreq/acpi-cpufreq.c')
-rw-r--r--drivers/cpufreq/acpi-cpufreq.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
index e4ff681faaaa..1e4fbb002a31 100644
--- a/drivers/cpufreq/acpi-cpufreq.c
+++ b/drivers/cpufreq/acpi-cpufreq.c
@@ -691,7 +691,8 @@ 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,