| Message ID | 20220919090045.6778-3-yangyicong@huawei.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Add perf support for HiSilicon PCIe Tune and Trace device | expand |
On 19/09/2022 10:00, Yicong Yang wrote: > From: Qi Liu <liuqi115@huawei.com> > > HiSilicon PCIe tune and trace device (PTT) could dynamically tune > the PCIe link's events, and trace the TLP headers). > > This patch add support for PTT device in perf tool, so users could > use 'perf record' to get TLP headers trace data. > > Reviewed-by: Leo Yan <leo.yan@linaro.org> > Signed-off-by: Qi Liu <liuqi115@huawei.com> > Signed-off-by: Yicong Yang <yangyicong@hisilicon.com> I'm not overly fimilar with the auxtrace code, but this patch looks ok apart from comments, so acked-by seems more appropiate than reviewed-by: Acked-by: John Garry <john.garry@huawei.com> > --- > tools/perf/arch/arm/util/auxtrace.c | 63 +++++++++ > tools/perf/arch/arm/util/pmu.c | 3 + > tools/perf/arch/arm64/util/Build | 2 +- > tools/perf/arch/arm64/util/hisi-ptt.c | 188 ++++++++++++++++++++++++++ > tools/perf/util/auxtrace.c | 1 + > tools/perf/util/auxtrace.h | 1 + > tools/perf/util/hisi-ptt.h | 16 +++ > 7 files changed, 273 insertions(+), 1 deletion(-) > create mode 100644 tools/perf/arch/arm64/util/hisi-ptt.c > create mode 100644 tools/perf/util/hisi-ptt.h > > diff --git a/tools/perf/arch/arm/util/auxtrace.c b/tools/perf/arch/arm/util/auxtrace.c > index 384c7cfda0fd..129ed72391a4 100644 > --- a/tools/perf/arch/arm/util/auxtrace.c > +++ b/tools/perf/arch/arm/util/auxtrace.c > @@ -4,9 +4,11 @@ > * Author: Mathieu Poirier <mathieu.poirier@linaro.org> > */ > > +#include <dirent.h> > #include <stdbool.h> > #include <linux/coresight-pmu.h> > #include <linux/zalloc.h> > +#include <api/fs/fs.h> > > #include "../../../util/auxtrace.h" > #include "../../../util/debug.h" > @@ -14,6 +16,7 @@ > #include "../../../util/pmu.h" > #include "cs-etm.h" > #include "arm-spe.h" > +#include "hisi-ptt.h" > > static struct perf_pmu **find_all_arm_spe_pmus(int *nr_spes, int *err) > { > @@ -50,6 +53,52 @@ static struct perf_pmu **find_all_arm_spe_pmus(int *nr_spes, int *err) > return arm_spe_pmus; > } > > +static struct perf_pmu **find_all_hisi_ptt_pmus(int *nr_ptts, int *err) > +{ > + const char *sysfs = sysfs__mountpoint(); > + struct perf_pmu **hisi_ptt_pmus = NULL; > + struct dirent *dent; > + char path[PATH_MAX]; > + DIR *dir = NULL; > + int idx = 0; > + > + snprintf(path, PATH_MAX, "%s" EVENT_SOURCE_DEVICE_PATH, sysfs); > + dir = opendir(path); > + if (!dir) { > + pr_err("can't read directory '%s'\n", EVENT_SOURCE_DEVICE_PATH); > + *err = -EINVAL; > + goto out; Do you really need to call closedir() in this scenario? > + } > + > + while ((dent = readdir(dir))) { > + if (strstr(dent->d_name, HISI_PTT_PMU_NAME)) > + (*nr_ptts)++; > + } > + > + if (!(*nr_ptts)) > + goto out; > + > + hisi_ptt_pmus = zalloc(sizeof(struct perf_pmu *) * (*nr_ptts)); > + if (!hisi_ptt_pmus) { > + pr_err("hisi_ptt alloc failed\n"); > + *err = -ENOMEM; > + goto out; > + } > + > + rewinddir(dir); > + while ((dent = readdir(dir))) { > + if (strstr(dent->d_name, HISI_PTT_PMU_NAME) && idx < (*nr_ptts)) { idx < *nr_ptts is ok > + hisi_ptt_pmus[idx] = perf_pmu__find(dent->d_name); > + if (hisi_ptt_pmus[idx]) > + idx++; > + } > + } > + > +out: > + closedir(dir); > + return hisi_ptt_pmus; > +} > + > static struct perf_pmu *find_pmu_for_event(struct perf_pmu **pmus, > int pmu_nr, struct evsel *evsel) > { > @@ -71,17 +120,21 @@ struct auxtrace_record > { > struct perf_pmu *cs_etm_pmu = NULL; > struct perf_pmu **arm_spe_pmus = NULL; > + struct perf_pmu **hisi_ptt_pmus = NULL; > struct evsel *evsel; > struct perf_pmu *found_etm = NULL; > struct perf_pmu *found_spe = NULL; > + struct perf_pmu *found_ptt = NULL; > int auxtrace_event_cnt = 0; > int nr_spes = 0; > + int nr_ptts = 0; > > if (!evlist) > return NULL; > > cs_etm_pmu = perf_pmu__find(CORESIGHT_ETM_PMU_NAME); > arm_spe_pmus = find_all_arm_spe_pmus(&nr_spes, err); > + hisi_ptt_pmus = find_all_hisi_ptt_pmus(&nr_ptts, err); > > evlist__for_each_entry(evlist, evsel) { > if (cs_etm_pmu && !found_etm) > @@ -89,9 +142,13 @@ struct auxtrace_record > > if (arm_spe_pmus && !found_spe) > found_spe = find_pmu_for_event(arm_spe_pmus, nr_spes, evsel); > + > + if (hisi_ptt_pmus && !found_ptt) > + found_ptt = find_pmu_for_event(hisi_ptt_pmus, nr_ptts, evsel); > } > > free(arm_spe_pmus); > + free(hisi_ptt_pmus); > > if (found_etm) > auxtrace_event_cnt++; > @@ -99,6 +156,9 @@ struct auxtrace_record > if (found_spe) > auxtrace_event_cnt++; > > + if (found_ptt) > + auxtrace_event_cnt++; > + > if (auxtrace_event_cnt > 1) { > pr_err("Concurrent AUX trace operation not currently supported\n"); > *err = -EOPNOTSUPP; > @@ -111,6 +171,9 @@ struct auxtrace_record > #if defined(__aarch64__) > if (found_spe) > return arm_spe_recording_init(err, found_spe); > + > + if (found_ptt) > + return hisi_ptt_recording_init(err, found_ptt); > #endif > > /* > diff --git a/tools/perf/arch/arm/util/pmu.c b/tools/perf/arch/arm/util/pmu.c > index b8b23b9dc598..887c8addc491 100644 > --- a/tools/perf/arch/arm/util/pmu.c > +++ b/tools/perf/arch/arm/util/pmu.c > @@ -10,6 +10,7 @@ > #include <linux/string.h> > > #include "arm-spe.h" > +#include "hisi-ptt.h" > #include "../../../util/pmu.h" > > struct perf_event_attr > @@ -22,6 +23,8 @@ struct perf_event_attr > #if defined(__aarch64__) > } else if (strstarts(pmu->name, ARM_SPE_PMU_NAME)) { > return arm_spe_pmu_default_config(pmu); > + } else if (strstarts(pmu->name, HISI_PTT_PMU_NAME)) { > + pmu->selectable = true; > #endif > } > > diff --git a/tools/perf/arch/arm64/util/Build b/tools/perf/arch/arm64/util/Build > index 9fcb4e68add9..337aa9bdf905 100644 > --- a/tools/perf/arch/arm64/util/Build > +++ b/tools/perf/arch/arm64/util/Build > @@ -11,4 +11,4 @@ perf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o > perf-$(CONFIG_AUXTRACE) += ../../arm/util/pmu.o \ > ../../arm/util/auxtrace.o \ > ../../arm/util/cs-etm.o \ > - arm-spe.o mem-events.o > + arm-spe.o mem-events.o hisi-ptt.o > diff --git a/tools/perf/arch/arm64/util/hisi-ptt.c b/tools/perf/arch/arm64/util/hisi-ptt.c > new file mode 100644 > index 000000000000..ba97c8a562a0 > --- /dev/null > +++ b/tools/perf/arch/arm64/util/hisi-ptt.c > @@ -0,0 +1,188 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * HiSilicon PCIe Trace and Tuning (PTT) support > + * Copyright (c) 2022 HiSilicon Technologies Co., Ltd. > + */ > + > +#include <linux/kernel.h> > +#include <linux/types.h> > +#include <linux/bitops.h> > +#include <linux/log2.h> > +#include <linux/zalloc.h> > +#include <time.h> > + > +#include <internal/lib.h> // page_size > +#include "../../../util/auxtrace.h" > +#include "../../../util/cpumap.h" > +#include "../../../util/debug.h" > +#include "../../../util/event.h" > +#include "../../../util/evlist.h" > +#include "../../../util/evsel.h" > +#include "../../../util/hisi-ptt.h" > +#include "../../../util/pmu.h" > +#include "../../../util/record.h" > +#include "../../../util/session.h" > +#include "../../../util/tsc.h" > + > +#define KiB(x) ((x) * 1024) > +#define MiB(x) ((x) * 1024 * 1024) surely we have defines for these available elsewhere > + > +struct hisi_ptt_recording { > + struct auxtrace_record itr; > + struct perf_pmu *hisi_ptt_pmu; > + struct evlist *evlist; > +}; > + > +static size_t > +hisi_ptt_info_priv_size(struct auxtrace_record *itr __maybe_unused, > + struct evlist *evlist __maybe_unused) > +{ > + return HISI_PTT_AUXTRACE_PRIV_SIZE; > +} > + > +static int hisi_ptt_info_fill(struct auxtrace_record *itr, > + struct perf_session *session, > + struct perf_record_auxtrace_info *auxtrace_info, > + size_t priv_size) > +{ > + struct hisi_ptt_recording *pttr = > + container_of(itr, struct hisi_ptt_recording, itr); > + struct perf_pmu *hisi_ptt_pmu = pttr->hisi_ptt_pmu; > + > + if (priv_size != HISI_PTT_AUXTRACE_PRIV_SIZE) > + return -EINVAL; > + > + if (!session->evlist->core.nr_mmaps) > + return -EINVAL; > + > + auxtrace_info->type = PERF_AUXTRACE_HISI_PTT; > + auxtrace_info->priv[0] = hisi_ptt_pmu->type; > + > + return 0; > +} > + > +static int hisi_ptt_set_auxtrace_mmap_page(struct record_opts *opts) > +{ > + bool privileged = perf_event_paranoid_check(-1); > + > + if (!opts->full_auxtrace) > + return 0; > + > + if (opts->full_auxtrace && !opts->auxtrace_mmap_pages) { > + if (privileged) { > + opts->auxtrace_mmap_pages = MiB(16) / page_size; > + } else { > + opts->auxtrace_mmap_pages = KiB(128) / page_size; > + if (opts->mmap_pages == UINT_MAX) > + opts->mmap_pages = KiB(256) / page_size; > + } > + } > + > + /* Validate auxtrace_mmap_pages */ > + if (opts->auxtrace_mmap_pages) { > + size_t sz = opts->auxtrace_mmap_pages * (size_t)page_size; > + size_t min_sz = KiB(8); > + > + if (sz < min_sz || !is_power_of_2(sz)) { > + pr_err("Invalid mmap size for HISI PTT: must be at least %zuKiB and a power of 2\n", > + min_sz / 1024); > + return -EINVAL; > + } > + } > + > + return 0; > +} > + > +static int hisi_ptt_recording_options(struct auxtrace_record *itr, > + struct evlist *evlist, > + struct record_opts *opts) > +{ > + struct hisi_ptt_recording *pttr = > + container_of(itr, struct hisi_ptt_recording, itr); > + struct perf_pmu *hisi_ptt_pmu = pttr->hisi_ptt_pmu; > + struct evsel *evsel, *hisi_ptt_evsel = NULL; > + struct evsel *tracking_evsel; > + int err; > + > + pttr->evlist = evlist; > + evlist__for_each_entry(evlist, evsel) { > + if (evsel->core.attr.type == hisi_ptt_pmu->type) { > + if (hisi_ptt_evsel) { > + pr_err("There may be only one " HISI_PTT_PMU_NAME "x event\n"); > + return -EINVAL; > + } > + evsel->core.attr.freq = 0; > + evsel->core.attr.sample_period = 1; > + evsel->needs_auxtrace_mmap = true; > + hisi_ptt_evsel = evsel; > + opts->full_auxtrace = true; > + } > + } > + > + err = hisi_ptt_set_auxtrace_mmap_page(opts); > + if (err) > + return err; > + /* > + * To obtain the auxtrace buffer file descriptor, the auxtrace event > + * must come first. > + */ > + evlist__to_front(evlist, hisi_ptt_evsel); > + evsel__set_sample_bit(hisi_ptt_evsel, TIME); > + > + /* Add dummy event to keep tracking */ > + err = parse_event(evlist, "dummy:u"); > + if (err) > + return err; > + > + tracking_evsel = evlist__last(evlist); > + evlist__set_tracking_event(evlist, tracking_evsel); > + > + tracking_evsel->core.attr.freq = 0; > + tracking_evsel->core.attr.sample_period = 1; > + evsel__set_sample_bit(tracking_evsel, TIME); > + > + return 0; > +} > + > +static u64 hisi_ptt_reference(struct auxtrace_record *itr __maybe_unused) > +{ > + return rdtsc(); > +} > + > +static void hisi_ptt_recording_free(struct auxtrace_record *itr) > +{ > + struct hisi_ptt_recording *pttr = > + container_of(itr, struct hisi_ptt_recording, itr); > + > + free(pttr); > +} > + > +struct auxtrace_record *hisi_ptt_recording_init(int *err, > + struct perf_pmu *hisi_ptt_pmu) > +{ > + struct hisi_ptt_recording *pttr; > + > + if (!hisi_ptt_pmu) { > + *err = -ENODEV; > + return NULL; > + } > + > + pttr = zalloc(sizeof(*pttr)); > + if (!pttr) { > + *err = -ENOMEM; > + return NULL; > + } > + > + pttr->hisi_ptt_pmu = hisi_ptt_pmu; > + pttr->itr.pmu = hisi_ptt_pmu; > + pttr->itr.recording_options = hisi_ptt_recording_options; > + pttr->itr.info_priv_size = hisi_ptt_info_priv_size; > + pttr->itr.info_fill = hisi_ptt_info_fill; > + pttr->itr.free = hisi_ptt_recording_free; > + pttr->itr.reference = hisi_ptt_reference; > + pttr->itr.read_finish = auxtrace_record__read_finish; > + pttr->itr.alignment = 0; > + > + *err = 0; > + return &pttr->itr; > +} > diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c > index 6edab8a16de6..c30611d9ee99 100644 > --- a/tools/perf/util/auxtrace.c > +++ b/tools/perf/util/auxtrace.c > @@ -1319,6 +1319,7 @@ int perf_event__process_auxtrace_info(struct perf_session *session, > case PERF_AUXTRACE_S390_CPUMSF: > err = s390_cpumsf_process_auxtrace_info(event, session); > break; > + case PERF_AUXTRACE_HISI_PTT: > case PERF_AUXTRACE_UNKNOWN: > default: > return -EINVAL; > diff --git a/tools/perf/util/auxtrace.h b/tools/perf/util/auxtrace.h > index 6a4fbfd34c6b..3a122fc01ccd 100644 > --- a/tools/perf/util/auxtrace.h > +++ b/tools/perf/util/auxtrace.h > @@ -48,6 +48,7 @@ enum auxtrace_type { > PERF_AUXTRACE_CS_ETM, > PERF_AUXTRACE_ARM_SPE, > PERF_AUXTRACE_S390_CPUMSF, > + PERF_AUXTRACE_HISI_PTT, > }; > > enum itrace_period_type { > diff --git a/tools/perf/util/hisi-ptt.h b/tools/perf/util/hisi-ptt.h I'm still not a fan of having a header file which is only included by 1x .c file, which this seems to be > new file mode 100644 > index 000000000000..82283c81b4c1 > --- /dev/null > +++ b/tools/perf/util/hisi-ptt.h > @@ -0,0 +1,16 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * HiSilicon PCIe Trace and Tuning (PTT) support > + * Copyright (c) 2022 HiSilicon Technologies Co., Ltd. > + */ > + > +#ifndef INCLUDE__PERF_HISI_PTT_H__ > +#define INCLUDE__PERF_HISI_PTT_H__ > + > +#define HISI_PTT_PMU_NAME "hisi_ptt" > +#define HISI_PTT_AUXTRACE_PRIV_SIZE sizeof(u64) > + > +struct auxtrace_record *hisi_ptt_recording_init(int *err, > + struct perf_pmu *hisi_ptt_pmu); > + > +#endif
On 2022/9/23 18:49, John Garry wrote: > On 19/09/2022 10:00, Yicong Yang wrote: >> From: Qi Liu <liuqi115@huawei.com> >> >> HiSilicon PCIe tune and trace device (PTT) could dynamically tune >> the PCIe link's events, and trace the TLP headers). >> >> This patch add support for PTT device in perf tool, so users could >> use 'perf record' to get TLP headers trace data. >> >> Reviewed-by: Leo Yan <leo.yan@linaro.org> >> Signed-off-by: Qi Liu <liuqi115@huawei.com> >> Signed-off-by: Yicong Yang <yangyicong@hisilicon.com> > > I'm not overly fimilar with the auxtrace code, but this patch looks ok apart from comments, so acked-by seems more appropiate than reviewed-by: > > Acked-by: John Garry <john.garry@huawei.com> Thanks! May I have the ack for the other 2 patches as well? Some replies below. > >> --- >> tools/perf/arch/arm/util/auxtrace.c | 63 +++++++++ >> tools/perf/arch/arm/util/pmu.c | 3 + >> tools/perf/arch/arm64/util/Build | 2 +- >> tools/perf/arch/arm64/util/hisi-ptt.c | 188 ++++++++++++++++++++++++++ >> tools/perf/util/auxtrace.c | 1 + >> tools/perf/util/auxtrace.h | 1 + >> tools/perf/util/hisi-ptt.h | 16 +++ >> 7 files changed, 273 insertions(+), 1 deletion(-) >> create mode 100644 tools/perf/arch/arm64/util/hisi-ptt.c >> create mode 100644 tools/perf/util/hisi-ptt.h >> >> diff --git a/tools/perf/arch/arm/util/auxtrace.c b/tools/perf/arch/arm/util/auxtrace.c >> index 384c7cfda0fd..129ed72391a4 100644 >> --- a/tools/perf/arch/arm/util/auxtrace.c >> +++ b/tools/perf/arch/arm/util/auxtrace.c >> @@ -4,9 +4,11 @@ >> * Author: Mathieu Poirier <mathieu.poirier@linaro.org> >> */ >> +#include <dirent.h> >> #include <stdbool.h> >> #include <linux/coresight-pmu.h> >> #include <linux/zalloc.h> >> +#include <api/fs/fs.h> >> #include "../../../util/auxtrace.h" >> #include "../../../util/debug.h" >> @@ -14,6 +16,7 @@ >> #include "../../../util/pmu.h" >> #include "cs-etm.h" >> #include "arm-spe.h" >> +#include "hisi-ptt.h" >> static struct perf_pmu **find_all_arm_spe_pmus(int *nr_spes, int *err) >> { >> @@ -50,6 +53,52 @@ static struct perf_pmu **find_all_arm_spe_pmus(int *nr_spes, int *err) >> return arm_spe_pmus; >> } >> +static struct perf_pmu **find_all_hisi_ptt_pmus(int *nr_ptts, int *err) >> +{ >> + const char *sysfs = sysfs__mountpoint(); >> + struct perf_pmu **hisi_ptt_pmus = NULL; >> + struct dirent *dent; >> + char path[PATH_MAX]; >> + DIR *dir = NULL; >> + int idx = 0; >> + >> + snprintf(path, PATH_MAX, "%s" EVENT_SOURCE_DEVICE_PATH, sysfs); >> + dir = opendir(path); >> + if (!dir) { >> + pr_err("can't read directory '%s'\n", EVENT_SOURCE_DEVICE_PATH); >> + *err = -EINVAL; >> + goto out; > > Do you really need to call closedir() in this scenario? > It's unnecessary here. will return NULL directly. >> + } >> + >> + while ((dent = readdir(dir))) { >> + if (strstr(dent->d_name, HISI_PTT_PMU_NAME)) >> + (*nr_ptts)++; >> + } >> + >> + if (!(*nr_ptts)) >> + goto out; >> + >> + hisi_ptt_pmus = zalloc(sizeof(struct perf_pmu *) * (*nr_ptts)); >> + if (!hisi_ptt_pmus) { >> + pr_err("hisi_ptt alloc failed\n"); >> + *err = -ENOMEM; >> + goto out; >> + } >> + >> + rewinddir(dir); >> + while ((dent = readdir(dir))) { >> + if (strstr(dent->d_name, HISI_PTT_PMU_NAME) && idx < (*nr_ptts)) { > > idx < *nr_ptts > > is ok > ok. >> + hisi_ptt_pmus[idx] = perf_pmu__find(dent->d_name); >> + if (hisi_ptt_pmus[idx]) >> + idx++; >> + } >> + } >> + >> +out: >> + closedir(dir); >> + return hisi_ptt_pmus; >> +} >> + [...] >> + >> +#define KiB(x) ((x) * 1024) >> +#define MiB(x) ((x) * 1024 * 1024) > > surely we have defines for these available elsewhere > Yes but we looks like have no public definition for these: yangyicong@ubuntu:~/mainline_linux/linux$ egrep -rwn "#define KiB|#define MiB" tools/perf/ tools/perf/arch/arm64/util/hisi-ptt.c:27:#define KiB(x) ((x) * 1024) tools/perf/arch/arm64/util/hisi-ptt.c:28:#define MiB(x) ((x) * 1024 * 1024) tools/perf/arch/arm64/util/arm-spe.c:28:#define KiB(x) ((x) * 1024) tools/perf/arch/arm64/util/arm-spe.c:29:#define MiB(x) ((x) * 1024 * 1024) tools/perf/arch/x86/util/intel-bts.c:28:#define KiB(x) ((x) * 1024) tools/perf/arch/x86/util/intel-bts.c:29:#define MiB(x) ((x) * 1024 * 1024) tools/perf/arch/x86/util/intel-pt.c:35:#define KiB(x) ((x) * 1024) tools/perf/arch/x86/util/intel-pt.c:36:#define MiB(x) ((x) * 1024 * 1024) tools/perf/util/cs-etm.h:188:#define KiB(x) ((x) * 1024) tools/perf/util/cs-etm.h:189:#define MiB(x) ((x) * 1024 * 1024) We can centralize this definition after this series. >> + >> +struct hisi_ptt_recording { >> + struct auxtrace_record itr; >> + struct perf_pmu *hisi_ptt_pmu; >> + struct evlist *evlist; >> +}; >> + [...] >> diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c >> index 6edab8a16de6..c30611d9ee99 100644 >> --- a/tools/perf/util/auxtrace.c >> +++ b/tools/perf/util/auxtrace.c >> @@ -1319,6 +1319,7 @@ int perf_event__process_auxtrace_info(struct perf_session *session, >> case PERF_AUXTRACE_S390_CPUMSF: >> err = s390_cpumsf_process_auxtrace_info(event, session); >> break; >> + case PERF_AUXTRACE_HISI_PTT: >> case PERF_AUXTRACE_UNKNOWN: >> default: >> return -EINVAL; >> diff --git a/tools/perf/util/auxtrace.h b/tools/perf/util/auxtrace.h >> index 6a4fbfd34c6b..3a122fc01ccd 100644 >> --- a/tools/perf/util/auxtrace.h >> +++ b/tools/perf/util/auxtrace.h >> @@ -48,6 +48,7 @@ enum auxtrace_type { >> PERF_AUXTRACE_CS_ETM, >> PERF_AUXTRACE_ARM_SPE, >> PERF_AUXTRACE_S390_CPUMSF, >> + PERF_AUXTRACE_HISI_PTT, >> }; >> enum itrace_period_type { >> diff --git a/tools/perf/util/hisi-ptt.h b/tools/perf/util/hisi-ptt.h > > I'm still not a fan of having a header file which is only included by 1x .c file, which this seems to be > The stuff in hisi-ptt.h is shared across several source files: yangyicong@ubuntu:~/mainline_linux/linux$ egrep -rn "hisi-ptt.h" tools/perf/ tools/perf/arch/arm64/util/hisi-ptt.c:21:#include "../../../util/hisi-ptt.h" tools/perf/arch/arm/util/auxtrace.c:19:#include "hisi-ptt.h" tools/perf/arch/arm/util/pmu.c:13:#include "hisi-ptt.h" Thanks, Yicong >> new file mode 100644 >> index 000000000000..82283c81b4c1 >> --- /dev/null >> +++ b/tools/perf/util/hisi-ptt.h >> @@ -0,0 +1,16 @@ >> +/* SPDX-License-Identifier: GPL-2.0 */ >> +/* >> + * HiSilicon PCIe Trace and Tuning (PTT) support >> + * Copyright (c) 2022 HiSilicon Technologies Co., Ltd. >> + */ >> + >> +#ifndef INCLUDE__PERF_HISI_PTT_H__ >> +#define INCLUDE__PERF_HISI_PTT_H__ >> + >> +#define HISI_PTT_PMU_NAME "hisi_ptt" >> +#define HISI_PTT_AUXTRACE_PRIV_SIZE sizeof(u64) >> + >> +struct auxtrace_record *hisi_ptt_recording_init(int *err, >> + struct perf_pmu *hisi_ptt_pmu); >> + >> +#endif > > .
Em Mon, Sep 26, 2022 at 02:53:34PM +0800, Yicong Yang escreveu: > On 2022/9/23 18:49, John Garry wrote: > > On 19/09/2022 10:00, Yicong Yang wrote: > >> From: Qi Liu <liuqi115@huawei.com> > >> > >> HiSilicon PCIe tune and trace device (PTT) could dynamically tune > >> the PCIe link's events, and trace the TLP headers). > >> > >> This patch add support for PTT device in perf tool, so users could > >> use 'perf record' to get TLP headers trace data. > >> > >> Reviewed-by: Leo Yan <leo.yan@linaro.org> > >> Signed-off-by: Qi Liu <liuqi115@huawei.com> > >> Signed-off-by: Yicong Yang <yangyicong@hisilicon.com> > > > > I'm not overly fimilar with the auxtrace code, but this patch looks ok apart from comments, so acked-by seems more appropiate than reviewed-by: > > > > Acked-by: John Garry <john.garry@huawei.com> Ok, applied it now. - Arnaldo > Thanks! May I have the ack for the other 2 patches as well? > > Some replies below. > > > > >> --- > >> tools/perf/arch/arm/util/auxtrace.c | 63 +++++++++ > >> tools/perf/arch/arm/util/pmu.c | 3 + > >> tools/perf/arch/arm64/util/Build | 2 +- > >> tools/perf/arch/arm64/util/hisi-ptt.c | 188 ++++++++++++++++++++++++++ > >> tools/perf/util/auxtrace.c | 1 + > >> tools/perf/util/auxtrace.h | 1 + > >> tools/perf/util/hisi-ptt.h | 16 +++ > >> 7 files changed, 273 insertions(+), 1 deletion(-) > >> create mode 100644 tools/perf/arch/arm64/util/hisi-ptt.c > >> create mode 100644 tools/perf/util/hisi-ptt.h > >> > >> diff --git a/tools/perf/arch/arm/util/auxtrace.c b/tools/perf/arch/arm/util/auxtrace.c > >> index 384c7cfda0fd..129ed72391a4 100644 > >> --- a/tools/perf/arch/arm/util/auxtrace.c > >> +++ b/tools/perf/arch/arm/util/auxtrace.c > >> @@ -4,9 +4,11 @@ > >> * Author: Mathieu Poirier <mathieu.poirier@linaro.org> > >> */ > >> +#include <dirent.h> > >> #include <stdbool.h> > >> #include <linux/coresight-pmu.h> > >> #include <linux/zalloc.h> > >> +#include <api/fs/fs.h> > >> #include "../../../util/auxtrace.h" > >> #include "../../../util/debug.h" > >> @@ -14,6 +16,7 @@ > >> #include "../../../util/pmu.h" > >> #include "cs-etm.h" > >> #include "arm-spe.h" > >> +#include "hisi-ptt.h" > >> static struct perf_pmu **find_all_arm_spe_pmus(int *nr_spes, int *err) > >> { > >> @@ -50,6 +53,52 @@ static struct perf_pmu **find_all_arm_spe_pmus(int *nr_spes, int *err) > >> return arm_spe_pmus; > >> } > >> +static struct perf_pmu **find_all_hisi_ptt_pmus(int *nr_ptts, int *err) > >> +{ > >> + const char *sysfs = sysfs__mountpoint(); > >> + struct perf_pmu **hisi_ptt_pmus = NULL; > >> + struct dirent *dent; > >> + char path[PATH_MAX]; > >> + DIR *dir = NULL; > >> + int idx = 0; > >> + > >> + snprintf(path, PATH_MAX, "%s" EVENT_SOURCE_DEVICE_PATH, sysfs); > >> + dir = opendir(path); > >> + if (!dir) { > >> + pr_err("can't read directory '%s'\n", EVENT_SOURCE_DEVICE_PATH); > >> + *err = -EINVAL; > >> + goto out; > > > > Do you really need to call closedir() in this scenario? > > > > It's unnecessary here. will return NULL directly. > > >> + } > >> + > >> + while ((dent = readdir(dir))) { > >> + if (strstr(dent->d_name, HISI_PTT_PMU_NAME)) > >> + (*nr_ptts)++; > >> + } > >> + > >> + if (!(*nr_ptts)) > >> + goto out; > >> + > >> + hisi_ptt_pmus = zalloc(sizeof(struct perf_pmu *) * (*nr_ptts)); > >> + if (!hisi_ptt_pmus) { > >> + pr_err("hisi_ptt alloc failed\n"); > >> + *err = -ENOMEM; > >> + goto out; > >> + } > >> + > >> + rewinddir(dir); > >> + while ((dent = readdir(dir))) { > >> + if (strstr(dent->d_name, HISI_PTT_PMU_NAME) && idx < (*nr_ptts)) { > > > > idx < *nr_ptts > > > > is ok > > > > ok. > > >> + hisi_ptt_pmus[idx] = perf_pmu__find(dent->d_name); > >> + if (hisi_ptt_pmus[idx]) > >> + idx++; > >> + } > >> + } > >> + > >> +out: > >> + closedir(dir); > >> + return hisi_ptt_pmus; > >> +} > >> + > > [...] > > >> + > >> +#define KiB(x) ((x) * 1024) > >> +#define MiB(x) ((x) * 1024 * 1024) > > > > surely we have defines for these available elsewhere > > > > Yes but we looks like have no public definition for these: > > yangyicong@ubuntu:~/mainline_linux/linux$ egrep -rwn "#define KiB|#define MiB" tools/perf/ > tools/perf/arch/arm64/util/hisi-ptt.c:27:#define KiB(x) ((x) * 1024) > tools/perf/arch/arm64/util/hisi-ptt.c:28:#define MiB(x) ((x) * 1024 * 1024) > tools/perf/arch/arm64/util/arm-spe.c:28:#define KiB(x) ((x) * 1024) > tools/perf/arch/arm64/util/arm-spe.c:29:#define MiB(x) ((x) * 1024 * 1024) > tools/perf/arch/x86/util/intel-bts.c:28:#define KiB(x) ((x) * 1024) > tools/perf/arch/x86/util/intel-bts.c:29:#define MiB(x) ((x) * 1024 * 1024) > tools/perf/arch/x86/util/intel-pt.c:35:#define KiB(x) ((x) * 1024) > tools/perf/arch/x86/util/intel-pt.c:36:#define MiB(x) ((x) * 1024 * 1024) > tools/perf/util/cs-etm.h:188:#define KiB(x) ((x) * 1024) > tools/perf/util/cs-etm.h:189:#define MiB(x) ((x) * 1024 * 1024) > > We can centralize this definition after this series. > > >> + > >> +struct hisi_ptt_recording { > >> + struct auxtrace_record itr; > >> + struct perf_pmu *hisi_ptt_pmu; > >> + struct evlist *evlist; > >> +}; > >> + > > [...] > > >> diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c > >> index 6edab8a16de6..c30611d9ee99 100644 > >> --- a/tools/perf/util/auxtrace.c > >> +++ b/tools/perf/util/auxtrace.c > >> @@ -1319,6 +1319,7 @@ int perf_event__process_auxtrace_info(struct perf_session *session, > >> case PERF_AUXTRACE_S390_CPUMSF: > >> err = s390_cpumsf_process_auxtrace_info(event, session); > >> break; > >> + case PERF_AUXTRACE_HISI_PTT: > >> case PERF_AUXTRACE_UNKNOWN: > >> default: > >> return -EINVAL; > >> diff --git a/tools/perf/util/auxtrace.h b/tools/perf/util/auxtrace.h > >> index 6a4fbfd34c6b..3a122fc01ccd 100644 > >> --- a/tools/perf/util/auxtrace.h > >> +++ b/tools/perf/util/auxtrace.h > >> @@ -48,6 +48,7 @@ enum auxtrace_type { > >> PERF_AUXTRACE_CS_ETM, > >> PERF_AUXTRACE_ARM_SPE, > >> PERF_AUXTRACE_S390_CPUMSF, > >> + PERF_AUXTRACE_HISI_PTT, > >> }; > >> enum itrace_period_type { > >> diff --git a/tools/perf/util/hisi-ptt.h b/tools/perf/util/hisi-ptt.h > > > > I'm still not a fan of having a header file which is only included by 1x .c file, which this seems to be > > > > The stuff in hisi-ptt.h is shared across several source files: > > yangyicong@ubuntu:~/mainline_linux/linux$ egrep -rn "hisi-ptt.h" tools/perf/ > tools/perf/arch/arm64/util/hisi-ptt.c:21:#include "../../../util/hisi-ptt.h" > tools/perf/arch/arm/util/auxtrace.c:19:#include "hisi-ptt.h" > tools/perf/arch/arm/util/pmu.c:13:#include "hisi-ptt.h" > > Thanks, > Yicong > > >> new file mode 100644 > >> index 000000000000..82283c81b4c1 > >> --- /dev/null > >> +++ b/tools/perf/util/hisi-ptt.h > >> @@ -0,0 +1,16 @@ > >> +/* SPDX-License-Identifier: GPL-2.0 */ > >> +/* > >> + * HiSilicon PCIe Trace and Tuning (PTT) support > >> + * Copyright (c) 2022 HiSilicon Technologies Co., Ltd. > >> + */ > >> + > >> +#ifndef INCLUDE__PERF_HISI_PTT_H__ > >> +#define INCLUDE__PERF_HISI_PTT_H__ > >> + > >> +#define HISI_PTT_PMU_NAME "hisi_ptt" > >> +#define HISI_PTT_AUXTRACE_PRIV_SIZE sizeof(u64) > >> + > >> +struct auxtrace_record *hisi_ptt_recording_init(int *err, > >> + struct perf_pmu *hisi_ptt_pmu); > >> + > >> +#endif > > > > .
diff --git a/tools/perf/arch/arm/util/auxtrace.c b/tools/perf/arch/arm/util/auxtrace.c index 384c7cfda0fd..129ed72391a4 100644 --- a/tools/perf/arch/arm/util/auxtrace.c +++ b/tools/perf/arch/arm/util/auxtrace.c @@ -4,9 +4,11 @@ * Author: Mathieu Poirier <mathieu.poirier@linaro.org> */ +#include <dirent.h> #include <stdbool.h> #include <linux/coresight-pmu.h> #include <linux/zalloc.h> +#include <api/fs/fs.h> #include "../../../util/auxtrace.h" #include "../../../util/debug.h" @@ -14,6 +16,7 @@ #include "../../../util/pmu.h" #include "cs-etm.h" #include "arm-spe.h" +#include "hisi-ptt.h" static struct perf_pmu **find_all_arm_spe_pmus(int *nr_spes, int *err) { @@ -50,6 +53,52 @@ static struct perf_pmu **find_all_arm_spe_pmus(int *nr_spes, int *err) return arm_spe_pmus; } +static struct perf_pmu **find_all_hisi_ptt_pmus(int *nr_ptts, int *err) +{ + const char *sysfs = sysfs__mountpoint(); + struct perf_pmu **hisi_ptt_pmus = NULL; + struct dirent *dent; + char path[PATH_MAX]; + DIR *dir = NULL; + int idx = 0; + + snprintf(path, PATH_MAX, "%s" EVENT_SOURCE_DEVICE_PATH, sysfs); + dir = opendir(path); + if (!dir) { + pr_err("can't read directory '%s'\n", EVENT_SOURCE_DEVICE_PATH); + *err = -EINVAL; + goto out; + } + + while ((dent = readdir(dir))) { + if (strstr(dent->d_name, HISI_PTT_PMU_NAME)) + (*nr_ptts)++; + } + + if (!(*nr_ptts)) + goto out; + + hisi_ptt_pmus = zalloc(sizeof(struct perf_pmu *) * (*nr_ptts)); + if (!hisi_ptt_pmus) { + pr_err("hisi_ptt alloc failed\n"); + *err = -ENOMEM; + goto out; + } + + rewinddir(dir); + while ((dent = readdir(dir))) { + if (strstr(dent->d_name, HISI_PTT_PMU_NAME) && idx < (*nr_ptts)) { + hisi_ptt_pmus[idx] = perf_pmu__find(dent->d_name); + if (hisi_ptt_pmus[idx]) + idx++; + } + } + +out: + closedir(dir); + return hisi_ptt_pmus; +} + static struct perf_pmu *find_pmu_for_event(struct perf_pmu **pmus, int pmu_nr, struct evsel *evsel) { @@ -71,17 +120,21 @@ struct auxtrace_record { struct perf_pmu *cs_etm_pmu = NULL; struct perf_pmu **arm_spe_pmus = NULL; + struct perf_pmu **hisi_ptt_pmus = NULL; struct evsel *evsel; struct perf_pmu *found_etm = NULL; struct perf_pmu *found_spe = NULL; + struct perf_pmu *found_ptt = NULL; int auxtrace_event_cnt = 0; int nr_spes = 0; + int nr_ptts = 0; if (!evlist) return NULL; cs_etm_pmu = perf_pmu__find(CORESIGHT_ETM_PMU_NAME); arm_spe_pmus = find_all_arm_spe_pmus(&nr_spes, err); + hisi_ptt_pmus = find_all_hisi_ptt_pmus(&nr_ptts, err); evlist__for_each_entry(evlist, evsel) { if (cs_etm_pmu && !found_etm) @@ -89,9 +142,13 @@ struct auxtrace_record if (arm_spe_pmus && !found_spe) found_spe = find_pmu_for_event(arm_spe_pmus, nr_spes, evsel); + + if (hisi_ptt_pmus && !found_ptt) + found_ptt = find_pmu_for_event(hisi_ptt_pmus, nr_ptts, evsel); } free(arm_spe_pmus); + free(hisi_ptt_pmus); if (found_etm) auxtrace_event_cnt++; @@ -99,6 +156,9 @@ struct auxtrace_record if (found_spe) auxtrace_event_cnt++; + if (found_ptt) + auxtrace_event_cnt++; + if (auxtrace_event_cnt > 1) { pr_err("Concurrent AUX trace operation not currently supported\n"); *err = -EOPNOTSUPP; @@ -111,6 +171,9 @@ struct auxtrace_record #if defined(__aarch64__) if (found_spe) return arm_spe_recording_init(err, found_spe); + + if (found_ptt) + return hisi_ptt_recording_init(err, found_ptt); #endif /* diff --git a/tools/perf/arch/arm/util/pmu.c b/tools/perf/arch/arm/util/pmu.c index b8b23b9dc598..887c8addc491 100644 --- a/tools/perf/arch/arm/util/pmu.c +++ b/tools/perf/arch/arm/util/pmu.c @@ -10,6 +10,7 @@ #include <linux/string.h> #include "arm-spe.h" +#include "hisi-ptt.h" #include "../../../util/pmu.h" struct perf_event_attr @@ -22,6 +23,8 @@ struct perf_event_attr #if defined(__aarch64__) } else if (strstarts(pmu->name, ARM_SPE_PMU_NAME)) { return arm_spe_pmu_default_config(pmu); + } else if (strstarts(pmu->name, HISI_PTT_PMU_NAME)) { + pmu->selectable = true; #endif } diff --git a/tools/perf/arch/arm64/util/Build b/tools/perf/arch/arm64/util/Build index 9fcb4e68add9..337aa9bdf905 100644 --- a/tools/perf/arch/arm64/util/Build +++ b/tools/perf/arch/arm64/util/Build @@ -11,4 +11,4 @@ perf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o perf-$(CONFIG_AUXTRACE) += ../../arm/util/pmu.o \ ../../arm/util/auxtrace.o \ ../../arm/util/cs-etm.o \ - arm-spe.o mem-events.o + arm-spe.o mem-events.o hisi-ptt.o diff --git a/tools/perf/arch/arm64/util/hisi-ptt.c b/tools/perf/arch/arm64/util/hisi-ptt.c new file mode 100644 index 000000000000..ba97c8a562a0 --- /dev/null +++ b/tools/perf/arch/arm64/util/hisi-ptt.c @@ -0,0 +1,188 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * HiSilicon PCIe Trace and Tuning (PTT) support + * Copyright (c) 2022 HiSilicon Technologies Co., Ltd. + */ + +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/bitops.h> +#include <linux/log2.h> +#include <linux/zalloc.h> +#include <time.h> + +#include <internal/lib.h> // page_size +#include "../../../util/auxtrace.h" +#include "../../../util/cpumap.h" +#include "../../../util/debug.h" +#include "../../../util/event.h" +#include "../../../util/evlist.h" +#include "../../../util/evsel.h" +#include "../../../util/hisi-ptt.h" +#include "../../../util/pmu.h" +#include "../../../util/record.h" +#include "../../../util/session.h" +#include "../../../util/tsc.h" + +#define KiB(x) ((x) * 1024) +#define MiB(x) ((x) * 1024 * 1024) + +struct hisi_ptt_recording { + struct auxtrace_record itr; + struct perf_pmu *hisi_ptt_pmu; + struct evlist *evlist; +}; + +static size_t +hisi_ptt_info_priv_size(struct auxtrace_record *itr __maybe_unused, + struct evlist *evlist __maybe_unused) +{ + return HISI_PTT_AUXTRACE_PRIV_SIZE; +} + +static int hisi_ptt_info_fill(struct auxtrace_record *itr, + struct perf_session *session, + struct perf_record_auxtrace_info *auxtrace_info, + size_t priv_size) +{ + struct hisi_ptt_recording *pttr = + container_of(itr, struct hisi_ptt_recording, itr); + struct perf_pmu *hisi_ptt_pmu = pttr->hisi_ptt_pmu; + + if (priv_size != HISI_PTT_AUXTRACE_PRIV_SIZE) + return -EINVAL; + + if (!session->evlist->core.nr_mmaps) + return -EINVAL; + + auxtrace_info->type = PERF_AUXTRACE_HISI_PTT; + auxtrace_info->priv[0] = hisi_ptt_pmu->type; + + return 0; +} + +static int hisi_ptt_set_auxtrace_mmap_page(struct record_opts *opts) +{ + bool privileged = perf_event_paranoid_check(-1); + + if (!opts->full_auxtrace) + return 0; + + if (opts->full_auxtrace && !opts->auxtrace_mmap_pages) { + if (privileged) { + opts->auxtrace_mmap_pages = MiB(16) / page_size; + } else { + opts->auxtrace_mmap_pages = KiB(128) / page_size; + if (opts->mmap_pages == UINT_MAX) + opts->mmap_pages = KiB(256) / page_size; + } + } + + /* Validate auxtrace_mmap_pages */ + if (opts->auxtrace_mmap_pages) { + size_t sz = opts->auxtrace_mmap_pages * (size_t)page_size; + size_t min_sz = KiB(8); + + if (sz < min_sz || !is_power_of_2(sz)) { + pr_err("Invalid mmap size for HISI PTT: must be at least %zuKiB and a power of 2\n", + min_sz / 1024); + return -EINVAL; + } + } + + return 0; +} + +static int hisi_ptt_recording_options(struct auxtrace_record *itr, + struct evlist *evlist, + struct record_opts *opts) +{ + struct hisi_ptt_recording *pttr = + container_of(itr, struct hisi_ptt_recording, itr); + struct perf_pmu *hisi_ptt_pmu = pttr->hisi_ptt_pmu; + struct evsel *evsel, *hisi_ptt_evsel = NULL; + struct evsel *tracking_evsel; + int err; + + pttr->evlist = evlist; + evlist__for_each_entry(evlist, evsel) { + if (evsel->core.attr.type == hisi_ptt_pmu->type) { + if (hisi_ptt_evsel) { + pr_err("There may be only one " HISI_PTT_PMU_NAME "x event\n"); + return -EINVAL; + } + evsel->core.attr.freq = 0; + evsel->core.attr.sample_period = 1; + evsel->needs_auxtrace_mmap = true; + hisi_ptt_evsel = evsel; + opts->full_auxtrace = true; + } + } + + err = hisi_ptt_set_auxtrace_mmap_page(opts); + if (err) + return err; + /* + * To obtain the auxtrace buffer file descriptor, the auxtrace event + * must come first. + */ + evlist__to_front(evlist, hisi_ptt_evsel); + evsel__set_sample_bit(hisi_ptt_evsel, TIME); + + /* Add dummy event to keep tracking */ + err = parse_event(evlist, "dummy:u"); + if (err) + return err; + + tracking_evsel = evlist__last(evlist); + evlist__set_tracking_event(evlist, tracking_evsel); + + tracking_evsel->core.attr.freq = 0; + tracking_evsel->core.attr.sample_period = 1; + evsel__set_sample_bit(tracking_evsel, TIME); + + return 0; +} + +static u64 hisi_ptt_reference(struct auxtrace_record *itr __maybe_unused) +{ + return rdtsc(); +} + +static void hisi_ptt_recording_free(struct auxtrace_record *itr) +{ + struct hisi_ptt_recording *pttr = + container_of(itr, struct hisi_ptt_recording, itr); + + free(pttr); +} + +struct auxtrace_record *hisi_ptt_recording_init(int *err, + struct perf_pmu *hisi_ptt_pmu) +{ + struct hisi_ptt_recording *pttr; + + if (!hisi_ptt_pmu) { + *err = -ENODEV; + return NULL; + } + + pttr = zalloc(sizeof(*pttr)); + if (!pttr) { + *err = -ENOMEM; + return NULL; + } + + pttr->hisi_ptt_pmu = hisi_ptt_pmu; + pttr->itr.pmu = hisi_ptt_pmu; + pttr->itr.recording_options = hisi_ptt_recording_options; + pttr->itr.info_priv_size = hisi_ptt_info_priv_size; + pttr->itr.info_fill = hisi_ptt_info_fill; + pttr->itr.free = hisi_ptt_recording_free; + pttr->itr.reference = hisi_ptt_reference; + pttr->itr.read_finish = auxtrace_record__read_finish; + pttr->itr.alignment = 0; + + *err = 0; + return &pttr->itr; +} diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c index 6edab8a16de6..c30611d9ee99 100644 --- a/tools/perf/util/auxtrace.c +++ b/tools/perf/util/auxtrace.c @@ -1319,6 +1319,7 @@ int perf_event__process_auxtrace_info(struct perf_session *session, case PERF_AUXTRACE_S390_CPUMSF: err = s390_cpumsf_process_auxtrace_info(event, session); break; + case PERF_AUXTRACE_HISI_PTT: case PERF_AUXTRACE_UNKNOWN: default: return -EINVAL; diff --git a/tools/perf/util/auxtrace.h b/tools/perf/util/auxtrace.h index 6a4fbfd34c6b..3a122fc01ccd 100644 --- a/tools/perf/util/auxtrace.h +++ b/tools/perf/util/auxtrace.h @@ -48,6 +48,7 @@ enum auxtrace_type { PERF_AUXTRACE_CS_ETM, PERF_AUXTRACE_ARM_SPE, PERF_AUXTRACE_S390_CPUMSF, + PERF_AUXTRACE_HISI_PTT, }; enum itrace_period_type { diff --git a/tools/perf/util/hisi-ptt.h b/tools/perf/util/hisi-ptt.h new file mode 100644 index 000000000000..82283c81b4c1 --- /dev/null +++ b/tools/perf/util/hisi-ptt.h @@ -0,0 +1,16 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * HiSilicon PCIe Trace and Tuning (PTT) support + * Copyright (c) 2022 HiSilicon Technologies Co., Ltd. + */ + +#ifndef INCLUDE__PERF_HISI_PTT_H__ +#define INCLUDE__PERF_HISI_PTT_H__ + +#define HISI_PTT_PMU_NAME "hisi_ptt" +#define HISI_PTT_AUXTRACE_PRIV_SIZE sizeof(u64) + +struct auxtrace_record *hisi_ptt_recording_init(int *err, + struct perf_pmu *hisi_ptt_pmu); + +#endif