diff options
Diffstat (limited to 'kernel/power/power.h')
| -rw-r--r-- | kernel/power/power.h | 120 |
1 files changed, 89 insertions, 31 deletions
diff --git a/kernel/power/power.h b/kernel/power/power.h index 7d4b7ffb3c1d..75b63843886e 100644 --- a/kernel/power/power.h +++ b/kernel/power/power.h @@ -1,7 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #include <linux/suspend.h> #include <linux/suspend_ioctls.h> #include <linux/utsname.h> #include <linux/freezer.h> +#include <linux/compiler.h> +#include <linux/cpu.h> +#include <linux/cpuidle.h> +#include <linux/crypto.h> struct swsusp_info { struct new_utsname uts; @@ -11,7 +16,12 @@ struct swsusp_info { unsigned long image_pages; unsigned long pages; unsigned long size; -} __attribute__((aligned(PAGE_SIZE))); +} __aligned(PAGE_SIZE); + +#if defined(CONFIG_SUSPEND) || defined(CONFIG_HIBERNATION) +extern int pm_sleep_fs_sync(void); +extern bool filesystem_freeze_enabled; +#endif #ifdef CONFIG_HIBERNATION /* kernel/power/snapshot.c */ @@ -22,15 +32,12 @@ extern void __init hibernate_image_size_init(void); /* Maximum size of architecture specific data in a hibernation header */ #define MAX_ARCH_HEADER_SIZE (sizeof(struct new_utsname) + 4) -extern int arch_hibernation_header_save(void *addr, unsigned int max_size); -extern int arch_hibernation_header_restore(void *addr); - static inline int init_header_complete(struct swsusp_info *info) { return arch_hibernation_header_save(info, MAX_ARCH_HEADER_SIZE); } -static inline char *check_image_kernel(struct swsusp_info *info) +static inline const char *check_image_kernel(struct swsusp_info *info) { return arch_hibernation_header_restore(info) ? "architecture specific data" : NULL; @@ -49,20 +56,35 @@ static inline char *check_image_kernel(struct swsusp_info *info) */ #define SPARE_PAGES ((1024 * 1024) >> PAGE_SHIFT) +asmlinkage int swsusp_save(void); + /* kernel/power/hibernate.c */ extern bool freezer_test_done; +extern char hib_comp_algo[CRYPTO_MAX_ALG_NAME]; + +/* kernel/power/swap.c */ +extern unsigned int swsusp_header_flags; extern int hibernation_snapshot(int platform_mode); extern int hibernation_restore(int platform_mode); extern int hibernation_platform_enter(void); +#ifdef CONFIG_STRICT_KERNEL_RWX +/* kernel/power/snapshot.c */ +extern void enable_restore_image_protection(void); +#else +static inline void enable_restore_image_protection(void) {} +#endif /* CONFIG_STRICT_KERNEL_RWX */ + +extern bool hibernation_in_progress(void); + #else /* !CONFIG_HIBERNATION */ static inline void hibernate_reserved_size_init(void) {} static inline void hibernate_image_size_init(void) {} -#endif /* !CONFIG_HIBERNATION */ -extern int pfn_is_nosave(unsigned long); +static inline bool hibernation_in_progress(void) { return false; } +#endif /* !CONFIG_HIBERNATION */ #define power_attr(_name) \ static struct kobj_attribute _name##_attr = { \ @@ -74,6 +96,15 @@ static struct kobj_attribute _name##_attr = { \ .store = _name##_store, \ } +#define power_attr_ro(_name) \ +static struct kobj_attribute _name##_attr = { \ + .attr = { \ + .name = __stringify(_name), \ + .mode = S_IRUGO, \ + }, \ + .show = _name##_show, \ +} + /* Preferred image size in bytes (default 500 MB) */ extern unsigned long image_size; /* Size of memory reserved for drivers (default SPARE_PAGES x PAGE_SIZE) */ @@ -82,14 +113,13 @@ extern int in_suspend; extern dev_t swsusp_resume_device; extern sector_t swsusp_resume_block; -extern asmlinkage int swsusp_arch_suspend(void); -extern asmlinkage int swsusp_arch_resume(void); - extern int create_basic_memory_bitmaps(void); extern void free_basic_memory_bitmaps(void); extern int hibernate_preallocate_memory(void); -/** +extern void clear_or_poison_free_pages(void); + +/* * Auxiliary structure used for reading the snapshot image data and * metadata from and writing them to the list of page backup entries * (PBEs) which is the main data structure of swsusp. @@ -132,11 +162,11 @@ extern unsigned int snapshot_additional_pages(struct zone *zone); extern unsigned long snapshot_get_image_size(void); extern int snapshot_read_next(struct snapshot_handle *handle); extern int snapshot_write_next(struct snapshot_handle *handle); -extern void snapshot_write_finalize(struct snapshot_handle *handle); +int snapshot_write_finalize(struct snapshot_handle *handle); extern int snapshot_image_loaded(struct snapshot_handle *handle); -/* If unset, the snapshot device cannot be open. */ -extern atomic_t snapshot_device_available; +extern bool hibernate_acquire(void); +extern void hibernate_release(void); extern sector_t alloc_swapdev_block(int swap); extern void free_all_swap_pages(int swap); @@ -146,46 +176,55 @@ extern int swsusp_swap_in_use(void); * Flags that can be passed from the hibernatig hernel to the "boot" kernel in * the image header. */ +#define SF_COMPRESSION_ALG_LZO 0 /* dummy, details given below */ #define SF_PLATFORM_MODE 1 #define SF_NOCOMPRESS_MODE 2 #define SF_CRC32_MODE 4 +#define SF_HW_SIG 8 + +/* + * Bit to indicate the compression algorithm to be used(for LZ4). The same + * could be checked while saving/loading image to/from disk to use the + * corresponding algorithms. + * + * By default, LZO compression is enabled if SF_CRC32_MODE is set. Use + * SF_COMPRESSION_ALG_LZ4 to override this behaviour and use LZ4. + * + * SF_CRC32_MODE, SF_COMPRESSION_ALG_LZO(dummy) -> Compression, LZO + * SF_CRC32_MODE, SF_COMPRESSION_ALG_LZ4 -> Compression, LZ4 + */ +#define SF_COMPRESSION_ALG_LZ4 16 /* kernel/power/hibernate.c */ -extern int swsusp_check(void); +int swsusp_check(bool exclusive); extern void swsusp_free(void); extern int swsusp_read(unsigned int *flags_p); extern int swsusp_write(unsigned int flags); -extern void swsusp_close(fmode_t); +void swsusp_close(void); #ifdef CONFIG_SUSPEND extern int swsusp_unmark(void); +#else +static inline int swsusp_unmark(void) { return 0; } #endif -/* kernel/power/block_io.c */ -extern struct block_device *hib_resume_bdev; - -extern int hib_bio_read_page(pgoff_t page_off, void *addr, - struct bio **bio_chain); -extern int hib_bio_write_page(pgoff_t page_off, void *addr, - struct bio **bio_chain); -extern int hib_wait_on_bio_chain(struct bio **bio_chain); - -struct timeval; +struct __kernel_old_timeval; /* kernel/power/swsusp.c */ -extern void swsusp_show_speed(struct timeval *, struct timeval *, - unsigned int, char *); +extern void swsusp_show_speed(ktime_t, ktime_t, unsigned int, char *); #ifdef CONFIG_SUSPEND /* kernel/power/suspend.c */ -extern const char *const pm_states[]; +extern const char * const pm_labels[]; +extern const char *pm_states[]; +extern const char *mem_sleep_states[]; -extern bool valid_state(suspend_state_t state); extern int suspend_devices_and_enter(suspend_state_t state); #else /* !CONFIG_SUSPEND */ +#define mem_sleep_current PM_SUSPEND_ON + static inline int suspend_devices_and_enter(suspend_state_t state) { return -ENOSYS; } -static inline bool valid_state(suspend_state_t state) { return false; } #endif /* !CONFIG_SUSPEND */ #ifdef CONFIG_PM_TEST_SUSPEND @@ -199,6 +238,7 @@ static inline void suspend_test_finish(const char *label) {} #ifdef CONFIG_PM_SLEEP /* kernel/power/main.c */ +extern int pm_notifier_call_chain_robust(unsigned long val_up, unsigned long val_down); extern int pm_notifier_call_chain(unsigned long val); #endif @@ -227,7 +267,11 @@ enum { #define TEST_FIRST TEST_NONE #define TEST_MAX (__TEST_AFTER_LAST - 1) +#ifdef CONFIG_PM_SLEEP_DEBUG extern int pm_test_level; +#else +#define pm_test_level (TEST_NONE) +#endif #ifdef CONFIG_SUSPEND_FREEZER static inline int suspend_freeze_processes(void) @@ -294,3 +338,17 @@ extern int pm_wake_lock(const char *buf); extern int pm_wake_unlock(const char *buf); #endif /* !CONFIG_PM_WAKELOCKS */ + +static inline int pm_sleep_disable_secondary_cpus(void) +{ + cpuidle_pause(); + return suspend_disable_secondary_cpus(); +} + +static inline void pm_sleep_enable_secondary_cpus(void) +{ + suspend_enable_secondary_cpus(); + cpuidle_resume(); +} + +void dpm_save_errno(int err); |