| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef __LIBPERF_INTERNAL_MMAP_H |
| #define __LIBPERF_INTERNAL_MMAP_H |
| |
| #include <linux/compiler.h> |
| #include <linux/refcount.h> |
| #include <linux/types.h> |
| #include <stdbool.h> |
| |
| /* perf sample has 16 bits size limit */ |
| #define PERF_SAMPLE_MAX_SIZE (1 << 16) |
| |
| /** |
| * struct perf_mmap - perf's ring buffer mmap details |
| * |
| * @refcnt - e.g. code using PERF_EVENT_IOC_SET_OUTPUT to share this |
| */ |
| struct perf_mmap { |
| void *base; |
| int mask; |
| int fd; |
| int cpu; |
| refcount_t refcnt; |
| u64 prev; |
| u64 start; |
| u64 end; |
| bool overwrite; |
| u64 flush; |
| char event_copy[PERF_SAMPLE_MAX_SIZE] __aligned(8); |
| }; |
| |
| #endif /* __LIBPERF_INTERNAL_MMAP_H */ |