[AMD Official Use Only - General] > -----Original Message----- > From: Meng, Li (Jassmine) <Li.Meng@xxxxxxx> > Sent: Wednesday, November 29, 2023 2:55 PM > To: Rafael J . Wysocki <rafael.j.wysocki@xxxxxxxxx>; Huang, Ray > <Ray.Huang@xxxxxxx> > Cc: linux-pm@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; x86@xxxxxxxxxx; > linux-acpi@xxxxxxxxxxxxxxx; Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>; linux- > kselftest@xxxxxxxxxxxxxxx; Fontenot, Nathan <Nathan.Fontenot@xxxxxxx>; > Sharma, Deepak <Deepak.Sharma@xxxxxxx>; Deucher, Alexander > <Alexander.Deucher@xxxxxxx>; Limonciello, Mario > <Mario.Limonciello@xxxxxxx>; Huang, Shimmer > <Shimmer.Huang@xxxxxxx>; Yuan, Perry <Perry.Yuan@xxxxxxx>; Du, > Xiaojian <Xiaojian.Du@xxxxxxx>; Viresh Kumar <viresh.kumar@xxxxxxxxxx>; > Borislav Petkov <bp@xxxxxxxxx>; Oleksandr Natalenko > <oleksandr@xxxxxxxxxxxxxx>; Meng, Li (Jassmine) <Li.Meng@xxxxxxx> > 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@xxxxxxxxxxxxxx> > Reviewed-by: Mario Limonciello <mario.limonciello@xxxxxxx> > Reviewed-by: Huang Rui <ray.huang@xxxxxxx> > Signed-off-by: Meng Li <li.meng@xxxxxxx> > 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@xxxxxxx>
