^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) #ifndef _KERNEL_EVENTS_INTERNAL_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) #define _KERNEL_EVENTS_INTERNAL_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <linux/hardirq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/refcount.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) /* Buffer handling */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #define RING_BUFFER_WRITABLE 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) struct perf_buffer {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) refcount_t refcount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) struct rcu_head rcu_head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #ifdef CONFIG_PERF_USE_VMALLOC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) struct work_struct work;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) int page_order; /* allocation order */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) int nr_pages; /* nr of data pages */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) int overwrite; /* can overwrite itself */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) int paused; /* can write into ring buffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) atomic_t poll; /* POLL_ for wakeups */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) local_t head; /* write position */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) unsigned int nest; /* nested writers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) local_t events; /* event limit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) local_t wakeup; /* wakeup stamp */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) local_t lost; /* nr records lost */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) long watermark; /* wakeup watermark */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) long aux_watermark;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) /* poll crap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) spinlock_t event_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct list_head event_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) atomic_t mmap_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) unsigned long mmap_locked;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct user_struct *mmap_user;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) /* AUX area */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) long aux_head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) unsigned int aux_nest;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) long aux_wakeup; /* last aux_watermark boundary crossed by aux_head */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) unsigned long aux_pgoff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) int aux_nr_pages;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) int aux_overwrite;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) atomic_t aux_mmap_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) unsigned long aux_mmap_locked;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) void (*free_aux)(void *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) refcount_t aux_refcount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) int aux_in_sampling;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) void **aux_pages;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) void *aux_priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) struct perf_event_mmap_page *user_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) void *data_pages[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) extern void rb_free(struct perf_buffer *rb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) static inline void rb_free_rcu(struct rcu_head *rcu_head)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) struct perf_buffer *rb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) rb = container_of(rcu_head, struct perf_buffer, rcu_head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) rb_free(rb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) static inline void rb_toggle_paused(struct perf_buffer *rb, bool pause)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (!pause && rb->nr_pages)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) rb->paused = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) rb->paused = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) extern struct perf_buffer *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) rb_alloc(int nr_pages, long watermark, int cpu, int flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) extern void perf_event_wakeup(struct perf_event *event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) extern int rb_alloc_aux(struct perf_buffer *rb, struct perf_event *event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) pgoff_t pgoff, int nr_pages, long watermark, int flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) extern void rb_free_aux(struct perf_buffer *rb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) extern struct perf_buffer *ring_buffer_get(struct perf_event *event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) extern void ring_buffer_put(struct perf_buffer *rb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) static inline bool rb_has_aux(struct perf_buffer *rb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) return !!rb->aux_nr_pages;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) void perf_event_aux_event(struct perf_event *event, unsigned long head,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) unsigned long size, u64 flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) extern struct page *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) perf_mmap_to_page(struct perf_buffer *rb, unsigned long pgoff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) #ifdef CONFIG_PERF_USE_VMALLOC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) * Back perf_mmap() with vmalloc memory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) * Required for architectures that have d-cache aliasing issues.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static inline int page_order(struct perf_buffer *rb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) return rb->page_order;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) static inline int page_order(struct perf_buffer *rb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) static inline unsigned long perf_data_size(struct perf_buffer *rb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) return rb->nr_pages << (PAGE_SHIFT + page_order(rb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) static inline unsigned long perf_aux_size(struct perf_buffer *rb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) return rb->aux_nr_pages << PAGE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) #define __DEFINE_OUTPUT_COPY_BODY(advance_buf, memcpy_func, ...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) unsigned long size, written; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) size = min(handle->size, len); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) written = memcpy_func(__VA_ARGS__); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) written = size - written; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) len -= written; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) handle->addr += written; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (advance_buf) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) buf += written; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) handle->size -= written; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) if (!handle->size) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) struct perf_buffer *rb = handle->rb; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) handle->page++; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) handle->page &= rb->nr_pages - 1; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) handle->addr = rb->data_pages[handle->page]; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) handle->size = PAGE_SIZE << page_order(rb); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) } \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) } while (len && written == size); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) return len; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) #define DEFINE_OUTPUT_COPY(func_name, memcpy_func) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) static inline unsigned long \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) func_name(struct perf_output_handle *handle, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) const void *buf, unsigned long len) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) __DEFINE_OUTPUT_COPY_BODY(true, memcpy_func, handle->addr, buf, size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) static inline unsigned long
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) __output_custom(struct perf_output_handle *handle, perf_copy_f copy_func,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) const void *buf, unsigned long len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) unsigned long orig_len = len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) __DEFINE_OUTPUT_COPY_BODY(false, copy_func, handle->addr, buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) orig_len - len, size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) static inline unsigned long
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) memcpy_common(void *dst, const void *src, unsigned long n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) memcpy(dst, src, n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) DEFINE_OUTPUT_COPY(__output_copy, memcpy_common)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) static inline unsigned long
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) memcpy_skip(void *dst, const void *src, unsigned long n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) DEFINE_OUTPUT_COPY(__output_skip, memcpy_skip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) #ifndef arch_perf_out_copy_user
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) #define arch_perf_out_copy_user arch_perf_out_copy_user
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) static inline unsigned long
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) arch_perf_out_copy_user(void *dst, const void *src, unsigned long n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) unsigned long ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) pagefault_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) ret = __copy_from_user_inatomic(dst, src, n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) pagefault_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) DEFINE_OUTPUT_COPY(__output_copy_user, arch_perf_out_copy_user)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) static inline int get_recursion_context(int *recursion)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) unsigned int pc = preempt_count();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) unsigned char rctx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) rctx += !!(pc & (NMI_MASK));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) rctx += !!(pc & (NMI_MASK | HARDIRQ_MASK));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) rctx += !!(pc & (NMI_MASK | HARDIRQ_MASK | SOFTIRQ_OFFSET));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) if (recursion[rctx])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) recursion[rctx]++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) barrier();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) return rctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) static inline void put_recursion_context(int *recursion, int rctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) barrier();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) recursion[rctx]--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) #ifdef CONFIG_HAVE_PERF_USER_STACK_DUMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) static inline bool arch_perf_have_user_stack_dump(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) #define perf_user_stack_pointer(regs) user_stack_pointer(regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) static inline bool arch_perf_have_user_stack_dump(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) #define perf_user_stack_pointer(regs) 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) #endif /* CONFIG_HAVE_PERF_USER_STACK_DUMP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) #endif /* _KERNEL_EVENTS_INTERNAL_H */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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