Add the perf_mmap to libperf. The definition is added into:
include/internal/mmap.h which is not to be included by users, but shared within perf and libperf. Link: http://lkml.kernel.org/n/tip-qdhqbwgaujfghfmmhbbp4...@git.kernel.org Signed-off-by: Jiri Olsa <jo...@kernel.org> --- tools/perf/arch/x86/tests/perf-time-to-tsc.c | 2 +- tools/perf/arch/x86/util/intel-bts.c | 2 +- tools/perf/arch/x86/util/intel-pt.c | 2 +- tools/perf/builtin-record.c | 14 ++++++------- tools/perf/lib/include/internal/mmap.h | 19 +++++++++++++++++ tools/perf/util/mmap.c | 22 ++++++++++---------- tools/perf/util/mmap.h | 7 ++++--- 7 files changed, 44 insertions(+), 24 deletions(-) create mode 100644 tools/perf/lib/include/internal/mmap.h diff --git a/tools/perf/arch/x86/tests/perf-time-to-tsc.c b/tools/perf/arch/x86/tests/perf-time-to-tsc.c index 3644ebd45a46..42725e6882e9 100644 --- a/tools/perf/arch/x86/tests/perf-time-to-tsc.c +++ b/tools/perf/arch/x86/tests/perf-time-to-tsc.c @@ -93,7 +93,7 @@ int test__perf_time_to_tsc(struct test *test __maybe_unused, int subtest __maybe CHECK__(evlist__mmap(evlist, UINT_MAX)); - pc = evlist->mmap[0].base; + pc = evlist->mmap[0].core.base; ret = perf_read_tsc_conversion(pc, &tc); if (ret) { if (ret == -EOPNOTSUPP) { diff --git a/tools/perf/arch/x86/util/intel-bts.c b/tools/perf/arch/x86/util/intel-bts.c index d263430c045f..aa13df948049 100644 --- a/tools/perf/arch/x86/util/intel-bts.c +++ b/tools/perf/arch/x86/util/intel-bts.c @@ -77,7 +77,7 @@ static int intel_bts_info_fill(struct auxtrace_record *itr, if (!session->evlist->nr_mmaps) return -EINVAL; - pc = session->evlist->mmap[0].base; + pc = session->evlist->mmap[0].core.base; if (pc) { err = perf_read_tsc_conversion(pc, &tc); if (err) { diff --git a/tools/perf/arch/x86/util/intel-pt.c b/tools/perf/arch/x86/util/intel-pt.c index cb7cf16af79c..c0a7535cfd0e 100644 --- a/tools/perf/arch/x86/util/intel-pt.c +++ b/tools/perf/arch/x86/util/intel-pt.c @@ -354,7 +354,7 @@ static int intel_pt_info_fill(struct auxtrace_record *itr, if (!session->evlist->nr_mmaps) return -EINVAL; - pc = session->evlist->mmap[0].base; + pc = session->evlist->mmap[0].core.base; if (pc) { err = perf_read_tsc_conversion(pc, &tc); if (err) { diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index df16e1ca1f36..6c0349dcb20c 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -258,7 +258,7 @@ static int record__aio_pushfn(struct mmap *map, void *to, void *buf, size_t size struct record_aio *aio = to; /* - * map->base data pointed by buf is copied into free map->aio.data[] buffer + * map->core.base data pointed by buf is copied into free map->aio.data[] buffer * to release space in the kernel buffer as fast as possible, calling * perf_mmap__consume() from perf_mmap__push() function. * @@ -357,7 +357,7 @@ static void record__aio_mmap_read_sync(struct record *rec) for (i = 0; i < evlist->nr_mmaps; i++) { struct mmap *map = &maps[i]; - if (map->base) + if (map->core.base) record__aio_sync(map, true); } } @@ -956,7 +956,7 @@ static int record__mmap_read_evlist(struct record *rec, struct evlist *evlist, u64 flush = 0; struct mmap *map = &maps[i]; - if (map->base) { + if (map->core.base) { record__adjust_affinity(rec, map); if (synch) { flush = map->flush; @@ -1193,10 +1193,10 @@ static const struct perf_event_mmap_page * perf_evlist__pick_pc(struct evlist *evlist) { if (evlist) { - if (evlist->mmap && evlist->mmap[0].base) - return evlist->mmap[0].base; - if (evlist->overwrite_mmap && evlist->overwrite_mmap[0].base) - return evlist->overwrite_mmap[0].base; + if (evlist->mmap && evlist->mmap[0].core.base) + return evlist->mmap[0].core.base; + if (evlist->overwrite_mmap && evlist->overwrite_mmap[0].core.base) + return evlist->overwrite_mmap[0].core.base; } return NULL; } diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h new file mode 100644 index 000000000000..8d10559dee49 --- /dev/null +++ b/tools/perf/lib/include/internal/mmap.h @@ -0,0 +1,19 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __LIBPERF_INTERNAL_MMAP_H +#define __LIBPERF_INTERNAL_MMAP_H + +#include <linux/refcount.h> +#include <linux/compiler.h> +#include <stdlib.h> +#include <stdbool.h> + +/** + * 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; +}; + +#endif /* __LIBPERF_INTERNAL_MMAP_H */ diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c index f3b7c8b0fa90..76190b2edd78 100644 --- a/tools/perf/util/mmap.c +++ b/tools/perf/util/mmap.c @@ -31,7 +31,7 @@ size_t perf_mmap__mmap_len(struct mmap *map) static union perf_event *perf_mmap__read(struct mmap *map, u64 *startp, u64 end) { - unsigned char *data = map->base + page_size; + unsigned char *data = map->core.base + page_size; union perf_event *event = NULL; int diff = end - *startp; @@ -116,7 +116,7 @@ void perf_mmap__get(struct mmap *map) void perf_mmap__put(struct mmap *map) { - BUG_ON(map->base && refcount_read(&map->refcnt) == 0); + BUG_ON(map->core.base && refcount_read(&map->refcnt) == 0); if (refcount_dec_and_test(&map->refcnt)) perf_mmap__munmap(map); @@ -317,9 +317,9 @@ void perf_mmap__munmap(struct mmap *map) munmap(map->data, perf_mmap__mmap_len(map)); map->data = NULL; } - if (map->base != NULL) { - munmap(map->base, perf_mmap__mmap_len(map)); - map->base = NULL; + if (map->core.base != NULL) { + munmap(map->core.base, perf_mmap__mmap_len(map)); + map->core.base = NULL; map->fd = -1; refcount_set(&map->refcnt, 0); } @@ -370,12 +370,12 @@ int perf_mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu) refcount_set(&map->refcnt, 2); map->prev = 0; map->mask = mp->mask; - map->base = mmap(NULL, perf_mmap__mmap_len(map), mp->prot, + map->core.base = mmap(NULL, perf_mmap__mmap_len(map), mp->prot, MAP_SHARED, fd, 0); - if (map->base == MAP_FAILED) { + if (map->core.base == MAP_FAILED) { pr_debug2("failed to mmap perf event ring buffer, error %d\n", errno); - map->base = NULL; + map->core.base = NULL; return -1; } map->fd = fd; @@ -399,7 +399,7 @@ int perf_mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu) } if (auxtrace_mmap__mmap(&map->auxtrace_mmap, - &mp->auxtrace_mp, map->base, fd)) + &mp->auxtrace_mp, map->core.base, fd)) return -1; return perf_mmap__aio_mmap(map, mp); @@ -444,7 +444,7 @@ static int __perf_mmap__read_init(struct mmap *md) { u64 head = perf_mmap__read_head(md); u64 old = md->prev; - unsigned char *data = md->base + page_size; + unsigned char *data = md->core.base + page_size; unsigned long size; md->start = md->overwrite ? head : old; @@ -489,7 +489,7 @@ int perf_mmap__push(struct mmap *md, void *to, int push(struct mmap *map, void *to, void *buf, size_t size)) { u64 head = perf_mmap__read_head(md); - unsigned char *data = md->base + page_size; + unsigned char *data = md->core.base + page_size; unsigned long size; void *buf; int rc = 0; diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h index 01524608a984..9028b0e8a0ed 100644 --- a/tools/perf/util/mmap.h +++ b/tools/perf/util/mmap.h @@ -1,6 +1,7 @@ #ifndef __PERF_MMAP_H #define __PERF_MMAP_H 1 +#include <internal/mmap.h> #include <linux/compiler.h> #include <linux/refcount.h> #include <linux/types.h> @@ -20,7 +21,7 @@ struct aiocb; * @refcnt - e.g. code using PERF_EVENT_IOC_SET_OUTPUT to share this */ struct mmap { - void *base; + struct perf_mmap core; int mask; int fd; int cpu; @@ -88,12 +89,12 @@ void perf_mmap__consume(struct mmap *map); static inline u64 perf_mmap__read_head(struct mmap *mm) { - return ring_buffer_read_head(mm->base); + return ring_buffer_read_head(mm->core.base); } static inline void perf_mmap__write_tail(struct mmap *md, u64 tail) { - ring_buffer_write_tail(md->base, tail); + ring_buffer_write_tail(md->core.base, tail); } union perf_event *perf_mmap__read_forward(struct mmap *map); -- 2.21.0
