| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef __LIBPERF_INTERNAL_MMAP_H |
| 3 | #define __LIBPERF_INTERNAL_MMAP_H |
| 4 | |
| 5 | #include <linux/compiler.h> |
| 6 | #include <linux/refcount.h> |
| 7 | #include <linux/types.h> |
| 8 | #include <stdbool.h> |
| 9 | |
| 10 | /* perf sample has 16 bits size limit */ |
| 11 | #define PERF_SAMPLE_MAX_SIZE (1 << 16) |
| 12 | |
| 13 | /** |
| 14 | * struct perf_mmap - perf's ring buffer mmap details |
| 15 | * |
| 16 | * @refcnt - e.g. code using PERF_EVENT_IOC_SET_OUTPUT to share this |
| 17 | */ |
| 18 | struct perf_mmap { |
| 19 | void *base; |
| 20 | int mask; |
| 21 | int fd; |
| 22 | int cpu; |
| 23 | refcount_t refcnt; |
| 24 | u64 prev; |
| 25 | u64 start; |
| 26 | u64 end; |
| 27 | bool overwrite; |
| 28 | u64 flush; |
| 29 | char event_copy[PERF_SAMPLE_MAX_SIZE] __aligned(8); |
| 30 | }; |
| 31 | |
| 32 | #endif /* __LIBPERF_INTERNAL_MMAP_H */ |