From db62fda318a6b9082ee9d230be8b45e56b6545c0 Mon Sep 17 00:00:00 2001 From: Sudeep Holla Date: Wed, 17 Feb 2016 11:54:19 +0000 Subject: ACPI / processor : add support for ACPI0010 processor container ACPI 6.0 adds support for optional processor container device which may contain child objects that are either processor devices or other processor containers. This allows representing hierarchical processor topologies. It is declared using the _HID of ACPI0010. It is an abstract container used to represent CPU topology and should not be used to hotplug purposes. If no matching handler is found for a device in acpi_scan_attach_handler, acpi_bus_attach does a default enumeration for those devices with valid HID in the acpi namespace. This patch adds a scan handler for these ACPI processor containers to avoid default that enumeration and ensures the platform devices are not created for them. Signed-off-by: Sudeep Holla Signed-off-by: Rafael J. Wysocki --- include/acpi/processor.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/acpi') diff --git a/include/acpi/processor.h b/include/acpi/processor.h index 07fb100bcc68..54d7860cac11 100644 --- a/include/acpi/processor.h +++ b/include/acpi/processor.h @@ -9,6 +9,7 @@ #define ACPI_PROCESSOR_CLASS "processor" #define ACPI_PROCESSOR_DEVICE_NAME "Processor" #define ACPI_PROCESSOR_DEVICE_HID "ACPI0007" +#define ACPI_PROCESSOR_CONTAINER_HID "ACPI0010" #define ACPI_PROCESSOR_BUSY_METRIC 10 -- cgit v1.2.3 From 504997cf96fabf67b4768b7a8ca1a1b622abd839 Mon Sep 17 00:00:00 2001 From: Sudeep Holla Date: Wed, 17 Feb 2016 12:03:23 +0000 Subject: ACPI / sleep: move acpi_processor_sleep to sleep.c acpi_processor_sleep is neither related nor used by CPUIdle framework. It's used in system suspend/resume path as a syscore operation. It makes more sense to move it to acpi/sleep.c where all the S-state transition (a.k.a. Linux system suspend/hiberate) related code are present. Also make it depend on CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT so that it's not compiled on architecture like ARM64 where S-states are not yet defined in ACPI. Signed-off-by: Sudeep Holla Signed-off-by: Rafael J. Wysocki --- drivers/acpi/processor_driver.c | 2 -- drivers/acpi/processor_idle.c | 37 ------------------------------------- drivers/acpi/sleep.c | 35 +++++++++++++++++++++++++++++++++++ include/acpi/processor.h | 8 -------- 4 files changed, 35 insertions(+), 47 deletions(-) (limited to 'include/acpi') diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c index 11154a330f07..d2fa8cb82d2b 100644 --- a/drivers/acpi/processor_driver.c +++ b/drivers/acpi/processor_driver.c @@ -314,7 +314,6 @@ static int __init acpi_processor_driver_init(void) if (result < 0) return result; - acpi_processor_syscore_init(); register_hotcpu_notifier(&acpi_cpu_notifier); acpi_thermal_cpufreq_init(); acpi_processor_ppc_init(); @@ -330,7 +329,6 @@ static void __exit acpi_processor_driver_exit(void) acpi_processor_ppc_exit(); acpi_thermal_cpufreq_exit(); unregister_hotcpu_notifier(&acpi_cpu_notifier); - acpi_processor_syscore_exit(); driver_unregister(&acpi_processor_driver); } diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index e057aa8fafb0..fadce354d2b7 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -31,7 +31,6 @@ #include /* need_resched() */ #include #include -#include #include /* @@ -193,42 +192,6 @@ static void lapic_timer_state_broadcast(struct acpi_processor *pr, #endif -#ifdef CONFIG_PM_SLEEP -static u32 saved_bm_rld; - -static int acpi_processor_suspend(void) -{ - acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &saved_bm_rld); - return 0; -} - -static void acpi_processor_resume(void) -{ - u32 resumed_bm_rld = 0; - - acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &resumed_bm_rld); - if (resumed_bm_rld == saved_bm_rld) - return; - - acpi_write_bit_register(ACPI_BITREG_BUS_MASTER_RLD, saved_bm_rld); -} - -static struct syscore_ops acpi_processor_syscore_ops = { - .suspend = acpi_processor_suspend, - .resume = acpi_processor_resume, -}; - -void acpi_processor_syscore_init(void) -{ - register_syscore_ops(&acpi_processor_syscore_ops); -} - -void acpi_processor_syscore_exit(void) -{ - unregister_syscore_ops(&acpi_processor_syscore_ops); -} -#endif /* CONFIG_PM_SLEEP */ - #if defined(CONFIG_X86) static void tsc_check_state(int state) { diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index 9cb975200cac..fbfcce3b5227 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include @@ -677,6 +678,39 @@ static void acpi_sleep_suspend_setup(void) static inline void acpi_sleep_suspend_setup(void) {} #endif /* !CONFIG_SUSPEND */ +#ifdef CONFIG_PM_SLEEP +static u32 saved_bm_rld; + +static int acpi_save_bm_rld(void) +{ + acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &saved_bm_rld); + return 0; +} + +static void acpi_restore_bm_rld(void) +{ + u32 resumed_bm_rld = 0; + + acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &resumed_bm_rld); + if (resumed_bm_rld == saved_bm_rld) + return; + + acpi_write_bit_register(ACPI_BITREG_BUS_MASTER_RLD, saved_bm_rld); +} + +static struct syscore_ops acpi_sleep_syscore_ops = { + .suspend = acpi_save_bm_rld, + .resume = acpi_restore_bm_rld, +}; + +void acpi_sleep_syscore_init(void) +{ + register_syscore_ops(&acpi_sleep_syscore_ops); +} +#else +static inline void acpi_sleep_syscore_init(void) {} +#endif /* CONFIG_PM_SLEEP */ + #ifdef CONFIG_HIBERNATION static unsigned long s4_hardware_signature; static struct acpi_table_facs *facs; @@ -839,6 +873,7 @@ int __init acpi_sleep_init(void) sleep_states[ACPI_STATE_S0] = 1; + acpi_sleep_syscore_init(); acpi_sleep_suspend_setup(); acpi_sleep_hibernate_setup(); diff --git a/include/acpi/processor.h b/include/acpi/processor.h index 54d7860cac11..6f1805dd5d3c 100644 --- a/include/acpi/processor.h +++ b/include/acpi/processor.h @@ -395,14 +395,6 @@ static inline int acpi_processor_hotplug(struct acpi_processor *pr) } #endif /* CONFIG_ACPI_PROCESSOR_IDLE */ -#if defined(CONFIG_PM_SLEEP) & defined(CONFIG_ACPI_PROCESSOR_IDLE) -void acpi_processor_syscore_init(void); -void acpi_processor_syscore_exit(void); -#else -static inline void acpi_processor_syscore_init(void) {} -static inline void acpi_processor_syscore_exit(void) {} -#endif - /* in processor_thermal.c */ int acpi_processor_get_limit_info(struct acpi_processor *pr); extern const struct thermal_cooling_device_ops processor_cooling_ops; -- cgit v1.2.3