[AMD Official Use Only - General]
-----Original Message----- From: Meng, Li (Jassmine) Li.Meng@amd.com Sent: Wednesday, November 29, 2023 2:55 PM To: Rafael J . Wysocki rafael.j.wysocki@intel.com; Huang, Ray Ray.Huang@amd.com Cc: linux-pm@vger.kernel.org; linux-kernel@vger.kernel.org; x86@kernel.org; linux-acpi@vger.kernel.org; Shuah Khan skhan@linuxfoundation.org; linux- kselftest@vger.kernel.org; Fontenot, Nathan Nathan.Fontenot@amd.com; Sharma, Deepak Deepak.Sharma@amd.com; Deucher, Alexander Alexander.Deucher@amd.com; Limonciello, Mario Mario.Limonciello@amd.com; Huang, Shimmer Shimmer.Huang@amd.com; Yuan, Perry Perry.Yuan@amd.com; Du, Xiaojian Xiaojian.Du@amd.com; Viresh Kumar viresh.kumar@linaro.org; Borislav Petkov bp@alien8.de; Oleksandr Natalenko oleksandr@natalenko.name; Meng, Li (Jassmine) Li.Meng@amd.com Subject: [PATCH V11 4/7] cpufreq: Add a notification message that the highest perf has changed
ACPI 6.5 section 8.4.6.1.1.1 specifies that Notify event 0x85 can be emmitted to cause the the OSPM to re-evaluate the highest performance register. Add support for this event.
Tested-by: Oleksandr Natalenko oleksandr@natalenko.name Reviewed-by: Mario Limonciello mario.limonciello@amd.com Reviewed-by: Huang Rui ray.huang@amd.com Signed-off-by: Meng Li li.meng@amd.com Link: https://uefi.org/specs/ACPI/6.5/05_ACPI_Software_Programming_Model.ht ml#processor-device-notification-values
drivers/acpi/processor_driver.c | 6 ++++++ drivers/cpufreq/cpufreq.c | 13 +++++++++++++ include/linux/cpufreq.h | 5 +++++ 3 files changed, 24 insertions(+)
diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c index 4bd16b3f0781..29b2fb68a35d 100644 --- a/drivers/acpi/processor_driver.c +++ b/drivers/acpi/processor_driver.c @@ -27,6 +27,7 @@ #define ACPI_PROCESSOR_NOTIFY_PERFORMANCE 0x80 #define ACPI_PROCESSOR_NOTIFY_POWER 0x81 #define ACPI_PROCESSOR_NOTIFY_THROTTLING 0x82 +#define ACPI_PROCESSOR_NOTIFY_HIGEST_PERF_CHANGED 0x85
MODULE_AUTHOR("Paul Diefenbaugh"); MODULE_DESCRIPTION("ACPI Processor Driver"); @@ -83,6 +84,11 @@ static void acpi_processor_notify(acpi_handle handle, u32 event, void *data) acpi_bus_generate_netlink_event(device->pnp.device_class, dev_name(&device->dev), event, 0); break;
case ACPI_PROCESSOR_NOTIFY_HIGEST_PERF_CHANGED:cpufreq_update_highest_perf(pr->id);acpi_bus_generate_netlink_event(device->pnp.device_class,dev_name(&device->dev),event, 0);
break; default: acpi_handle_debug(handle, "Unsupported event [0x%x]\n",event); break; diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 934d35f570b7..14a4cbc6dd05 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -2717,6 +2717,19 @@ void cpufreq_update_limits(unsigned int cpu) } EXPORT_SYMBOL_GPL(cpufreq_update_limits);
+/**
- cpufreq_update_highest_perf - Update highest performance for a given
CPU.
- @cpu: CPU to update the highest performance for.
- Invoke the driver's ->update_highest_perf callback if present */
+void cpufreq_update_highest_perf(unsigned int cpu) {
if (cpufreq_driver->update_highest_perf)cpufreq_driver->update_highest_perf(cpu);+} +EXPORT_SYMBOL_GPL(cpufreq_update_highest_perf);
/******************************************************************
BOOST *
**/ diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index 1c5ca92a0555..f62257b2a42f 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -235,6 +235,7 @@ int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu); void refresh_frequency_limits(struct cpufreq_policy *policy); void cpufreq_update_policy(unsigned int cpu); void cpufreq_update_limits(unsigned int cpu); +void cpufreq_update_highest_perf(unsigned int cpu); bool have_governor_per_policy(void); bool cpufreq_supports_freq_invariance(void); struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy); @@ -263,6 +264,7 @@ static inline bool cpufreq_supports_freq_invariance(void) return false; } static inline void disable_cpufreq(void) { } +static inline void cpufreq_update_highest_perf(unsigned int cpu) { } #endif
#ifdef CONFIG_CPU_FREQ_STAT @@ -380,6 +382,9 @@ struct cpufreq_driver { /* Called to update policy limits on firmware notifications. */ void (*update_limits)(unsigned int cpu);
/* Called to update highest performance on firmware notifications. */void (*update_highest_perf)(unsigned int cpu);/* optional */ int (*bios_limit)(int cpu, unsigned int *limit);-- 2.34.1
Reviewed-by: Perry Yuan perry.yuan@amd.com