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SubjectRe: [PATCH V6 08/17] perf tools: Add Intel PT support


On 19/06/2015 7:04 p.m., Arnaldo Carvalho de Melo wrote:
> Em Fri, May 29, 2015 at 04:33:36PM +0300, Adrian Hunter escreveu:
>> Add support for Intel Processor Trace.
>>
>> Intel PT support fits within the new auxtrace infrastructure.
>> Recording is supporting by identifying the Intel PT PMU,
>> parsing options and setting up events. Decoding is supported
>> by queuing up trace data by cpu or thread and then decoding
>> synchronously delivering synthesized event samples into the
>> session processing for tools to consume.
>
> So, at this point what commands should I use to test this? I expected to
> be able to have some command here, in this changeset log, telling me
> that what has been applied so far + this "Add Intel PT support", can be
> used in such and such a fashion, obtaining this and that output.
>
> Now I'll go back and look at the cover letter to see what I can do at
> this point and with access to a Broadwell class machine.

Actually you need the next patch "perf tools: Take Intel PT into use" to do anything.

>
> - Arnaldo
>
>> Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
>> ---
>> tools/perf/arch/x86/util/Build | 2 +
>> tools/perf/arch/x86/util/intel-pt.c | 752 ++++++++++++++
>> tools/perf/util/Build | 1 +
>> tools/perf/util/intel-pt.c | 1889 +++++++++++++++++++++++++++++++++++
>> tools/perf/util/intel-pt.h | 51 +
>> 5 files changed, 2695 insertions(+)
>> create mode 100644 tools/perf/arch/x86/util/intel-pt.c
>> create mode 100644 tools/perf/util/intel-pt.c
>> create mode 100644 tools/perf/util/intel-pt.h
>>
>> diff --git a/tools/perf/arch/x86/util/Build b/tools/perf/arch/x86/util/Build
>> index cfbccc4..1396088 100644
>> --- a/tools/perf/arch/x86/util/Build
>> +++ b/tools/perf/arch/x86/util/Build
>> @@ -6,3 +6,5 @@ libperf-$(CONFIG_DWARF) += dwarf-regs.o
>>
>> libperf-$(CONFIG_LIBUNWIND) += unwind-libunwind.o
>> libperf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
>> +
>> +libperf-$(CONFIG_AUXTRACE) += intel-pt.o
>> diff --git a/tools/perf/arch/x86/util/intel-pt.c b/tools/perf/arch/x86/util/intel-pt.c
>> new file mode 100644
>> index 0000000..da7d2c1
>> --- /dev/null
>> +++ b/tools/perf/arch/x86/util/intel-pt.c
>> @@ -0,0 +1,752 @@
>> +/*
>> + * intel_pt.c: Intel Processor Trace support
>> + * Copyright (c) 2013-2015, Intel Corporation.
>> + *
>> + * This program is free software; you can redistribute it and/or modify it
>> + * under the terms and conditions of the GNU General Public License,
>> + * version 2, as published by the Free Software Foundation.
>> + *
>> + * This program is distributed in the hope it will be useful, but WITHOUT
>> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
>> + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
>> + * more details.
>> + *
>> + */
>> +
>> +#include <stdbool.h>
>> +#include <linux/kernel.h>
>> +#include <linux/types.h>
>> +#include <linux/bitops.h>
>> +#include <linux/log2.h>
>> +
>> +#include "../../perf.h"
>> +#include "../../util/session.h"
>> +#include "../../util/event.h"
>> +#include "../../util/evlist.h"
>> +#include "../../util/evsel.h"
>> +#include "../../util/cpumap.h"
>> +#include "../../util/parse-options.h"
>> +#include "../../util/parse-events.h"
>> +#include "../../util/pmu.h"
>> +#include "../../util/debug.h"
>> +#include "../../util/auxtrace.h"
>> +#include "../../util/tsc.h"
>> +#include "../../util/intel-pt.h"
>> +
>> +#define KiB(x) ((x) * 1024)
>> +#define MiB(x) ((x) * 1024 * 1024)
>> +#define KiB_MASK(x) (KiB(x) - 1)
>> +#define MiB_MASK(x) (MiB(x) - 1)
>> +
>> +#define INTEL_PT_DEFAULT_SAMPLE_SIZE KiB(4)
>> +
>> +#define INTEL_PT_MAX_SAMPLE_SIZE KiB(60)
>> +
>> +#define INTEL_PT_PSB_PERIOD_NEAR 256
>> +
>> +struct intel_pt_snapshot_ref {
>> + void *ref_buf;
>> + size_t ref_offset;
>> + bool wrapped;
>> +};
>> +
>> +struct intel_pt_recording {
>> + struct auxtrace_record itr;
>> + struct perf_pmu *intel_pt_pmu;
>> + int have_sched_switch;
>> + struct perf_evlist *evlist;
>> + bool snapshot_mode;
>> + bool snapshot_init_done;
>> + size_t snapshot_size;
>> + size_t snapshot_ref_buf_size;
>> + int snapshot_ref_cnt;
>> + struct intel_pt_snapshot_ref *snapshot_refs;
>> +};
>> +
>> +static int intel_pt_parse_terms_with_default(struct list_head *formats,
>> + const char *str,
>> + u64 *config)
>> +{
>> + struct list_head *terms;
>> + struct perf_event_attr attr = { .size = 0, };
>> + int err;
>> +
>> + terms = malloc(sizeof(struct list_head));
>> + if (!terms)
>> + return -ENOMEM;
>> +
>> + INIT_LIST_HEAD(terms);
>> +
>> + err = parse_events_terms(terms, str);
>> + if (err)
>> + goto out_free;
>> +
>> + attr.config = *config;
>> + err = perf_pmu__config_terms(formats, &attr, terms, true, NULL);
>> + if (err)
>> + goto out_free;
>> +
>> + *config = attr.config;
>> +out_free:
>> + parse_events__free_terms(terms);
>> + return err;
>> +}
>> +
>> +static int intel_pt_parse_terms(struct list_head *formats, const char *str,
>> + u64 *config)
>> +{
>> + *config = 0;
>> + return intel_pt_parse_terms_with_default(formats, str, config);
>> +}
>> +
>> +static size_t intel_pt_psb_period(struct perf_pmu *intel_pt_pmu __maybe_unused,
>> + struct perf_evlist *evlist __maybe_unused)
>> +{
>> + return 256;
>> +}
>> +
>> +static u64 intel_pt_default_config(struct perf_pmu *intel_pt_pmu)
>> +{
>> + u64 config;
>> +
>> + intel_pt_parse_terms(&intel_pt_pmu->format, "tsc", &config);
>> + return config;
>> +}
>> +
>> +static int intel_pt_parse_snapshot_options(struct auxtrace_record *itr,
>> + struct record_opts *opts,
>> + const char *str)
>> +{
>> + struct intel_pt_recording *ptr =
>> + container_of(itr, struct intel_pt_recording, itr);
>> + unsigned long long snapshot_size = 0;
>> + char *endptr;
>> +
>> + if (str) {
>> + snapshot_size = strtoull(str, &endptr, 0);
>> + if (*endptr || snapshot_size > SIZE_MAX)
>> + return -1;
>> + }
>> +
>> + opts->auxtrace_snapshot_mode = true;
>> + opts->auxtrace_snapshot_size = snapshot_size;
>> +
>> + ptr->snapshot_size = snapshot_size;
>> +
>> + return 0;
>> +}
>> +
>> +struct perf_event_attr *
>> +intel_pt_pmu_default_config(struct perf_pmu *intel_pt_pmu)
>> +{
>> + struct perf_event_attr *attr;
>> +
>> + attr = zalloc(sizeof(struct perf_event_attr));
>> + if (!attr)
>> + return NULL;
>> +
>> + attr->config = intel_pt_default_config(intel_pt_pmu);
>> +
>> + intel_pt_pmu->selectable = true;
>> +
>> + return attr;
>> +}
>> +
>> +static size_t intel_pt_info_priv_size(struct auxtrace_record *itr __maybe_unused)
>> +{
>> + return INTEL_PT_AUXTRACE_PRIV_SIZE;
>> +}
>> +
>> +static int intel_pt_info_fill(struct auxtrace_record *itr,
>> + struct perf_session *session,
>> + struct auxtrace_info_event *auxtrace_info,
>> + size_t priv_size)
>> +{
>> + struct intel_pt_recording *ptr =
>> + container_of(itr, struct intel_pt_recording, itr);
>> + struct perf_pmu *intel_pt_pmu = ptr->intel_pt_pmu;
>> + struct perf_event_mmap_page *pc;
>> + struct perf_tsc_conversion tc = { .time_mult = 0, };
>> + bool cap_user_time_zero = false, per_cpu_mmaps;
>> + u64 tsc_bit, noretcomp_bit;
>> + int err;
>> +
>> + if (priv_size != INTEL_PT_AUXTRACE_PRIV_SIZE)
>> + return -EINVAL;
>> +
>> + intel_pt_parse_terms(&intel_pt_pmu->format, "tsc", &tsc_bit);
>> + intel_pt_parse_terms(&intel_pt_pmu->format, "noretcomp",
>> + &noretcomp_bit);
>> +
>> + if (!session->evlist->nr_mmaps)
>> + return -EINVAL;
>> +
>> + pc = session->evlist->mmap[0].base;
>> + if (pc) {
>> + err = perf_read_tsc_conversion(pc, &tc);
>> + if (err) {
>> + if (err != -EOPNOTSUPP)
>> + return err;
>> + } else {
>> + cap_user_time_zero = tc.time_mult != 0;
>> + }
>> + if (!cap_user_time_zero)
>> + ui__warning("Intel Processor Trace: TSC not available\n");
>> + }
>> +
>> + per_cpu_mmaps = !cpu_map__empty(session->evlist->cpus);
>> +
>> + auxtrace_info->type = PERF_AUXTRACE_INTEL_PT;
>> + auxtrace_info->priv[INTEL_PT_PMU_TYPE] = intel_pt_pmu->type;
>> + auxtrace_info->priv[INTEL_PT_TIME_SHIFT] = tc.time_shift;
>> + auxtrace_info->priv[INTEL_PT_TIME_MULT] = tc.time_mult;
>> + auxtrace_info->priv[INTEL_PT_TIME_ZERO] = tc.time_zero;
>> + auxtrace_info->priv[INTEL_PT_CAP_USER_TIME_ZERO] = cap_user_time_zero;
>> + auxtrace_info->priv[INTEL_PT_TSC_BIT] = tsc_bit;
>> + auxtrace_info->priv[INTEL_PT_NORETCOMP_BIT] = noretcomp_bit;
>> + auxtrace_info->priv[INTEL_PT_HAVE_SCHED_SWITCH] = ptr->have_sched_switch;
>> + auxtrace_info->priv[INTEL_PT_SNAPSHOT_MODE] = ptr->snapshot_mode;
>> + auxtrace_info->priv[INTEL_PT_PER_CPU_MMAPS] = per_cpu_mmaps;
>> +
>> + return 0;
>> +}
>> +
>> +static int intel_pt_track_switches(struct perf_evlist *evlist)
>> +{
>> + const char *sched_switch = "sched:sched_switch";
>> + struct perf_evsel *evsel;
>> + int err;
>> +
>> + if (!perf_evlist__can_select_event(evlist, sched_switch))
>> + return -EPERM;
>> +
>> + err = parse_events(evlist, sched_switch, NULL);
>> + if (err) {
>> + pr_debug2("%s: failed to parse %s, error %d\n",
>> + __func__, sched_switch, err);
>> + return err;
>> + }
>> +
>> + evsel = perf_evlist__last(evlist);
>> +
>> + perf_evsel__set_sample_bit(evsel, CPU);
>> + perf_evsel__set_sample_bit(evsel, TIME);
>> +
>> + evsel->system_wide = true;
>> + evsel->no_aux_samples = true;
>> + evsel->immediate = true;
>> +
>> + return 0;
>> +}
>> +
>> +static int intel_pt_recording_options(struct auxtrace_record *itr,
>> + struct perf_evlist *evlist,
>> + struct record_opts *opts)
>> +{
>> + struct intel_pt_recording *ptr =
>> + container_of(itr, struct intel_pt_recording, itr);
>> + struct perf_pmu *intel_pt_pmu = ptr->intel_pt_pmu;
>> + bool have_timing_info;
>> + struct perf_evsel *evsel, *intel_pt_evsel = NULL;
>> + const struct cpu_map *cpus = evlist->cpus;
>> + bool privileged = geteuid() == 0 || perf_event_paranoid() < 0;
>> + u64 tsc_bit;
>> +
>> + ptr->evlist = evlist;
>> + ptr->snapshot_mode = opts->auxtrace_snapshot_mode;
>> +
>> + evlist__for_each(evlist, evsel) {
>> + if (evsel->attr.type == intel_pt_pmu->type) {
>> + if (intel_pt_evsel) {
>> + pr_err("There may be only one " INTEL_PT_PMU_NAME " event\n");
>> + return -EINVAL;
>> + }
>> + evsel->attr.freq = 0;
>> + evsel->attr.sample_period = 1;
>> + intel_pt_evsel = evsel;
>> + opts->full_auxtrace = true;
>> + }
>> + }
>> +
>> + if (opts->auxtrace_snapshot_mode && !opts->full_auxtrace) {
>> + pr_err("Snapshot mode (-S option) requires " INTEL_PT_PMU_NAME " PMU event (-e " INTEL_PT_PMU_NAME ")\n");
>> + return -EINVAL;
>> + }
>> +
>> + if (opts->use_clockid) {
>> + pr_err("Cannot use clockid (-k option) with " INTEL_PT_PMU_NAME "\n");
>> + return -EINVAL;
>> + }
>> +
>> + if (!opts->full_auxtrace)
>> + return 0;
>> +
>> + /* Set default sizes for snapshot mode */
>> + if (opts->auxtrace_snapshot_mode) {
>> + size_t psb_period = intel_pt_psb_period(intel_pt_pmu, evlist);
>> +
>> + if (!opts->auxtrace_snapshot_size && !opts->auxtrace_mmap_pages) {
>> + if (privileged) {
>> + opts->auxtrace_mmap_pages = MiB(4) / page_size;
>> + } else {
>> + opts->auxtrace_mmap_pages = KiB(128) / page_size;
>> + if (opts->mmap_pages == UINT_MAX)
>> + opts->mmap_pages = KiB(256) / page_size;
>> + }
>> + } else if (!opts->auxtrace_mmap_pages && !privileged &&
>> + opts->mmap_pages == UINT_MAX) {
>> + opts->mmap_pages = KiB(256) / page_size;
>> + }
>> + if (!opts->auxtrace_snapshot_size)
>> + opts->auxtrace_snapshot_size =
>> + opts->auxtrace_mmap_pages * (size_t)page_size;
>> + if (!opts->auxtrace_mmap_pages) {
>> + size_t sz = opts->auxtrace_snapshot_size;
>> +
>> + sz = round_up(sz, page_size) / page_size;
>> + opts->auxtrace_mmap_pages = roundup_pow_of_two(sz);
>> + }
>> + if (opts->auxtrace_snapshot_size >
>> + opts->auxtrace_mmap_pages * (size_t)page_size) {
>> + pr_err("Snapshot size %zu must not be greater than AUX area tracing mmap size %zu\n",
>> + opts->auxtrace_snapshot_size,
>> + opts->auxtrace_mmap_pages * (size_t)page_size);
>> + return -EINVAL;
>> + }
>> + if (!opts->auxtrace_snapshot_size || !opts->auxtrace_mmap_pages) {
>> + pr_err("Failed to calculate default snapshot size and/or AUX area tracing mmap pages\n");
>> + return -EINVAL;
>> + }
>> + pr_debug2("Intel PT snapshot size: %zu\n",
>> + opts->auxtrace_snapshot_size);
>> + if (psb_period &&
>> + opts->auxtrace_snapshot_size <= psb_period +
>> + INTEL_PT_PSB_PERIOD_NEAR)
>> + ui__warning("Intel PT snapshot size (%zu) may be too small for PSB period (%zu)\n",
>> + opts->auxtrace_snapshot_size, psb_period);
>> + }
>> +
>> + /* Set default sizes for full trace mode */
>> + if (opts->full_auxtrace && !opts->auxtrace_mmap_pages) {
>> + if (privileged) {
>> + opts->auxtrace_mmap_pages = MiB(4) / 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;
>> +
>> + if (opts->auxtrace_snapshot_mode)
>> + min_sz = KiB(4);
>> + else
>> + min_sz = KiB(8);
>> +
>> + if (sz < min_sz || !is_power_of_2(sz)) {
>> + pr_err("Invalid mmap size for Intel Processor Trace: must be at least %zuKiB and a power of 2\n",
>> + min_sz / 1024);
>> + return -EINVAL;
>> + }
>> + }
>> +
>> + intel_pt_parse_terms(&intel_pt_pmu->format, "tsc", &tsc_bit);
>> +
>> + if (opts->full_auxtrace && (intel_pt_evsel->attr.config & tsc_bit))
>> + have_timing_info = true;
>> + else
>> + have_timing_info = false;
>> +
>> + /*
>> + * Per-cpu recording needs sched_switch events to distinguish different
>> + * threads.
>> + */
>> + if (have_timing_info && !cpu_map__empty(cpus)) {
>> + int err;
>> +
>> + err = intel_pt_track_switches(evlist);
>> + if (err == -EPERM)
>> + pr_debug2("Unable to select sched:sched_switch\n");
>> + else if (err)
>> + return err;
>> + else
>> + ptr->have_sched_switch = 1;
>> + }
>> +
>> + if (intel_pt_evsel) {
>> + /*
>> + * To obtain the auxtrace buffer file descriptor, the auxtrace
>> + * event must come first.
>> + */
>> + perf_evlist__to_front(evlist, intel_pt_evsel);
>> + /*
>> + * In the case of per-cpu mmaps, we need the CPU on the
>> + * AUX event.
>> + */
>> + if (!cpu_map__empty(cpus))
>> + perf_evsel__set_sample_bit(intel_pt_evsel, CPU);
>> + }
>> +
>> + /* Add dummy event to keep tracking */
>> + if (opts->full_auxtrace) {
>> + struct perf_evsel *tracking_evsel;
>> + int err;
>> +
>> + err = parse_events(evlist, "dummy:u", NULL);
>> + if (err)
>> + return err;
>> +
>> + tracking_evsel = perf_evlist__last(evlist);
>> +
>> + perf_evlist__set_tracking_event(evlist, tracking_evsel);
>> +
>> + tracking_evsel->attr.freq = 0;
>> + tracking_evsel->attr.sample_period = 1;
>> +
>> + /* In per-cpu case, always need the time of mmap events etc */
>> + if (!cpu_map__empty(cpus))
>> + perf_evsel__set_sample_bit(tracking_evsel, TIME);
>> + }
>> +
>> + /*
>> + * Warn the user when we do not have enough information to decode i.e.
>> + * per-cpu with no sched_switch (except workload-only).
>> + */
>> + if (!ptr->have_sched_switch && !cpu_map__empty(cpus) &&
>> + !target__none(&opts->target))
>> + ui__warning("Intel Processor Trace decoding will not be possible except for kernel tracing!\n");
>> +
>> + return 0;
>> +}
>> +
>> +static int intel_pt_snapshot_start(struct auxtrace_record *itr)
>> +{
>> + struct intel_pt_recording *ptr =
>> + container_of(itr, struct intel_pt_recording, itr);
>> + struct perf_evsel *evsel;
>> +
>> + evlist__for_each(ptr->evlist, evsel) {
>> + if (evsel->attr.type == ptr->intel_pt_pmu->type)
>> + return perf_evlist__disable_event(ptr->evlist, evsel);
>> + }
>> + return -EINVAL;
>> +}
>> +
>> +static int intel_pt_snapshot_finish(struct auxtrace_record *itr)
>> +{
>> + struct intel_pt_recording *ptr =
>> + container_of(itr, struct intel_pt_recording, itr);
>> + struct perf_evsel *evsel;
>> +
>> + evlist__for_each(ptr->evlist, evsel) {
>> + if (evsel->attr.type == ptr->intel_pt_pmu->type)
>> + return perf_evlist__enable_event(ptr->evlist, evsel);
>> + }
>> + return -EINVAL;
>> +}
>> +
>> +static int intel_pt_alloc_snapshot_refs(struct intel_pt_recording *ptr, int idx)
>> +{
>> + const size_t sz = sizeof(struct intel_pt_snapshot_ref);
>> + int cnt = ptr->snapshot_ref_cnt, new_cnt = cnt * 2;
>> + struct intel_pt_snapshot_ref *refs;
>> +
>> + if (!new_cnt)
>> + new_cnt = 16;
>> +
>> + while (new_cnt <= idx)
>> + new_cnt *= 2;
>> +
>> + refs = calloc(new_cnt, sz);
>> + if (!refs)
>> + return -ENOMEM;
>> +
>> + memcpy(refs, ptr->snapshot_refs, cnt * sz);
>> +
>> + ptr->snapshot_refs = refs;
>> + ptr->snapshot_ref_cnt = new_cnt;
>> +
>> + return 0;
>> +}
>> +
>> +static void intel_pt_free_snapshot_refs(struct intel_pt_recording *ptr)
>> +{
>> + int i;
>> +
>> + for (i = 0; i < ptr->snapshot_ref_cnt; i++)
>> + zfree(&ptr->snapshot_refs[i].ref_buf);
>> + zfree(&ptr->snapshot_refs);
>> +}
>> +
>> +static void intel_pt_recording_free(struct auxtrace_record *itr)
>> +{
>> + struct intel_pt_recording *ptr =
>> + container_of(itr, struct intel_pt_recording, itr);
>> +
>> + intel_pt_free_snapshot_refs(ptr);
>> + free(ptr);
>> +}
>> +
>> +static int intel_pt_alloc_snapshot_ref(struct intel_pt_recording *ptr, int idx,
>> + size_t snapshot_buf_size)
>> +{
>> + size_t ref_buf_size = ptr->snapshot_ref_buf_size;
>> + void *ref_buf;
>> +
>> + ref_buf = zalloc(ref_buf_size);
>> + if (!ref_buf)
>> + return -ENOMEM;
>> +
>> + ptr->snapshot_refs[idx].ref_buf = ref_buf;
>> + ptr->snapshot_refs[idx].ref_offset = snapshot_buf_size - ref_buf_size;
>> +
>> + return 0;
>> +}
>> +
>> +static size_t intel_pt_snapshot_ref_buf_size(struct intel_pt_recording *ptr,
>> + size_t snapshot_buf_size)
>> +{
>> + const size_t max_size = 256 * 1024;
>> + size_t buf_size = 0, psb_period;
>> +
>> + if (ptr->snapshot_size <= 64 * 1024)
>> + return 0;
>> +
>> + psb_period = intel_pt_psb_period(ptr->intel_pt_pmu, ptr->evlist);
>> + if (psb_period)
>> + buf_size = psb_period * 2;
>> +
>> + if (!buf_size || buf_size > max_size)
>> + buf_size = max_size;
>> +
>> + if (buf_size >= snapshot_buf_size)
>> + return 0;
>> +
>> + if (buf_size >= ptr->snapshot_size / 2)
>> + return 0;
>> +
>> + return buf_size;
>> +}
>> +
>> +static int intel_pt_snapshot_init(struct intel_pt_recording *ptr,
>> + size_t snapshot_buf_size)
>> +{
>> + if (ptr->snapshot_init_done)
>> + return 0;
>> +
>> + ptr->snapshot_init_done = true;
>> +
>> + ptr->snapshot_ref_buf_size = intel_pt_snapshot_ref_buf_size(ptr,
>> + snapshot_buf_size);
>> +
>> + return 0;
>> +}
>> +
>> +/**
>> + * intel_pt_compare_buffers - compare bytes in a buffer to a circular buffer.
>> + * @buf1: first buffer
>> + * @compare_size: number of bytes to compare
>> + * @buf2: second buffer (a circular buffer)
>> + * @offs2: offset in second buffer
>> + * @buf2_size: size of second buffer
>> + *
>> + * The comparison allows for the possibility that the bytes to compare in the
>> + * circular buffer are not contiguous. It is assumed that @compare_size <=
>> + * @buf2_size. This function returns %false if the bytes are identical, %true
>> + * otherwise.
>> + */
>> +static bool intel_pt_compare_buffers(void *buf1, size_t compare_size,
>> + void *buf2, size_t offs2, size_t buf2_size)
>> +{
>> + size_t end2 = offs2 + compare_size, part_size;
>> +
>> + if (end2 <= buf2_size)
>> + return memcmp(buf1, buf2 + offs2, compare_size);
>> +
>> + part_size = end2 - buf2_size;
>> + if (memcmp(buf1, buf2 + offs2, part_size))
>> + return true;
>> +
>> + compare_size -= part_size;
>> +
>> + return memcmp(buf1 + part_size, buf2, compare_size);
>> +}
>> +
>> +static bool intel_pt_compare_ref(void *ref_buf, size_t ref_offset,
>> + size_t ref_size, size_t buf_size,
>> + void *data, size_t head)
>> +{
>> + size_t ref_end = ref_offset + ref_size;
>> +
>> + if (ref_end > buf_size) {
>> + if (head > ref_offset || head < ref_end - buf_size)
>> + return true;
>> + } else if (head > ref_offset && head < ref_end) {
>> + return true;
>> + }
>> +
>> + return intel_pt_compare_buffers(ref_buf, ref_size, data, ref_offset,
>> + buf_size);
>> +}
>> +
>> +static void intel_pt_copy_ref(void *ref_buf, size_t ref_size, size_t buf_size,
>> + void *data, size_t head)
>> +{
>> + if (head >= ref_size) {
>> + memcpy(ref_buf, data + head - ref_size, ref_size);
>> + } else {
>> + memcpy(ref_buf, data, head);
>> + ref_size -= head;
>> + memcpy(ref_buf + head, data + buf_size - ref_size, ref_size);
>> + }
>> +}
>> +
>> +static bool intel_pt_wrapped(struct intel_pt_recording *ptr, int idx,
>> + struct auxtrace_mmap *mm, unsigned char *data,
>> + u64 head)
>> +{
>> + struct intel_pt_snapshot_ref *ref = &ptr->snapshot_refs[idx];
>> + bool wrapped;
>> +
>> + wrapped = intel_pt_compare_ref(ref->ref_buf, ref->ref_offset,
>> + ptr->snapshot_ref_buf_size, mm->len,
>> + data, head);
>> +
>> + intel_pt_copy_ref(ref->ref_buf, ptr->snapshot_ref_buf_size, mm->len,
>> + data, head);
>> +
>> + return wrapped;
>> +}
>> +
>> +static bool intel_pt_first_wrap(u64 *data, size_t buf_size)
>> +{
>> + int i, a, b;
>> +
>> + b = buf_size >> 3;
>> + a = b - 512;
>> + if (a < 0)
>> + a = 0;
>> +
>> + for (i = a; i < b; i++) {
>> + if (data[i])
>> + return true;
>> + }
>> +
>> + return false;
>> +}
>> +
>> +static int intel_pt_find_snapshot(struct auxtrace_record *itr, int idx,
>> + struct auxtrace_mmap *mm, unsigned char *data,
>> + u64 *head, u64 *old)
>> +{
>> + struct intel_pt_recording *ptr =
>> + container_of(itr, struct intel_pt_recording, itr);
>> + bool wrapped;
>> + int err;
>> +
>> + pr_debug3("%s: mmap index %d old head %zu new head %zu\n",
>> + __func__, idx, (size_t)*old, (size_t)*head);
>> +
>> + err = intel_pt_snapshot_init(ptr, mm->len);
>> + if (err)
>> + goto out_err;
>> +
>> + if (idx >= ptr->snapshot_ref_cnt) {
>> + err = intel_pt_alloc_snapshot_refs(ptr, idx);
>> + if (err)
>> + goto out_err;
>> + }
>> +
>> + if (ptr->snapshot_ref_buf_size) {
>> + if (!ptr->snapshot_refs[idx].ref_buf) {
>> + err = intel_pt_alloc_snapshot_ref(ptr, idx, mm->len);
>> + if (err)
>> + goto out_err;
>> + }
>> + wrapped = intel_pt_wrapped(ptr, idx, mm, data, *head);
>> + } else {
>> + wrapped = ptr->snapshot_refs[idx].wrapped;
>> + if (!wrapped && intel_pt_first_wrap((u64 *)data, mm->len)) {
>> + ptr->snapshot_refs[idx].wrapped = true;
>> + wrapped = true;
>> + }
>> + }
>> +
>> + /*
>> + * In full trace mode 'head' continually increases. However in snapshot
>> + * mode 'head' is an offset within the buffer. Here 'old' and 'head'
>> + * are adjusted to match the full trace case which expects that 'old' is
>> + * always less than 'head'.
>> + */
>> + if (wrapped) {
>> + *old = *head;
>> + *head += mm->len;
>> + } else {
>> + if (mm->mask)
>> + *old &= mm->mask;
>> + else
>> + *old %= mm->len;
>> + if (*old > *head)
>> + *head += mm->len;
>> + }
>> +
>> + pr_debug3("%s: wrap-around %sdetected, adjusted old head %zu adjusted new head %zu\n",
>> + __func__, wrapped ? "" : "not ", (size_t)*old, (size_t)*head);
>> +
>> + return 0;
>> +
>> +out_err:
>> + pr_err("%s: failed, error %d\n", __func__, err);
>> + return err;
>> +}
>> +
>> +static u64 intel_pt_reference(struct auxtrace_record *itr __maybe_unused)
>> +{
>> + return rdtsc();
>> +}
>> +
>> +static int intel_pt_read_finish(struct auxtrace_record *itr, int idx)
>> +{
>> + struct intel_pt_recording *ptr =
>> + container_of(itr, struct intel_pt_recording, itr);
>> + struct perf_evsel *evsel;
>> +
>> + evlist__for_each(ptr->evlist, evsel) {
>> + if (evsel->attr.type == ptr->intel_pt_pmu->type)
>> + return perf_evlist__enable_event_idx(ptr->evlist, evsel,
>> + idx);
>> + }
>> + return -EINVAL;
>> +}
>> +
>> +struct auxtrace_record *intel_pt_recording_init(int *err)
>> +{
>> + struct perf_pmu *intel_pt_pmu = perf_pmu__find(INTEL_PT_PMU_NAME);
>> + struct intel_pt_recording *ptr;
>> +
>> + if (!intel_pt_pmu)
>> + return NULL;
>> +
>> + ptr = zalloc(sizeof(struct intel_pt_recording));
>> + if (!ptr) {
>> + *err = -ENOMEM;
>> + return NULL;
>> + }
>> +
>> + ptr->intel_pt_pmu = intel_pt_pmu;
>> + ptr->itr.recording_options = intel_pt_recording_options;
>> + ptr->itr.info_priv_size = intel_pt_info_priv_size;
>> + ptr->itr.info_fill = intel_pt_info_fill;
>> + ptr->itr.free = intel_pt_recording_free;
>> + ptr->itr.snapshot_start = intel_pt_snapshot_start;
>> + ptr->itr.snapshot_finish = intel_pt_snapshot_finish;
>> + ptr->itr.find_snapshot = intel_pt_find_snapshot;
>> + ptr->itr.parse_snapshot_options = intel_pt_parse_snapshot_options;
>> + ptr->itr.reference = intel_pt_reference;
>> + ptr->itr.read_finish = intel_pt_read_finish;
>> + return &ptr->itr;
>> +}
>> diff --git a/tools/perf/util/Build b/tools/perf/util/Build
>> index 86c81f6..ec7ab9d 100644
>> --- a/tools/perf/util/Build
>> +++ b/tools/perf/util/Build
>> @@ -76,6 +76,7 @@ libperf-y += cloexec.o
>> libperf-y += thread-stack.o
>> libperf-$(CONFIG_AUXTRACE) += auxtrace.o
>> libperf-$(CONFIG_AUXTRACE) += intel-pt-decoder/
>> +libperf-$(CONFIG_AUXTRACE) += intel-pt.o
>> libperf-y += parse-branch-options.o
>>
>> libperf-$(CONFIG_LIBELF) += symbol-elf.o
>> diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c
>> new file mode 100644
>> index 0000000..6d66879
>> --- /dev/null
>> +++ b/tools/perf/util/intel-pt.c
>> @@ -0,0 +1,1889 @@
>> +/*
>> + * intel_pt.c: Intel Processor Trace support
>> + * Copyright (c) 2013-2015, Intel Corporation.
>> + *
>> + * This program is free software; you can redistribute it and/or modify it
>> + * under the terms and conditions of the GNU General Public License,
>> + * version 2, as published by the Free Software Foundation.
>> + *
>> + * This program is distributed in the hope it will be useful, but WITHOUT
>> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
>> + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
>> + * more details.
>> + *
>> + */
>> +
>> +#include <stdio.h>
>> +#include <stdbool.h>
>> +#include <errno.h>
>> +#include <linux/kernel.h>
>> +#include <linux/types.h>
>> +
>> +#include "../perf.h"
>> +#include "session.h"
>> +#include "machine.h"
>> +#include "tool.h"
>> +#include "event.h"
>> +#include "evlist.h"
>> +#include "evsel.h"
>> +#include "map.h"
>> +#include "color.h"
>> +#include "util.h"
>> +#include "thread.h"
>> +#include "thread-stack.h"
>> +#include "symbol.h"
>> +#include "callchain.h"
>> +#include "dso.h"
>> +#include "debug.h"
>> +#include "auxtrace.h"
>> +#include "tsc.h"
>> +#include "intel-pt.h"
>> +
>> +#include "intel-pt-decoder/intel-pt-log.h"
>> +#include "intel-pt-decoder/intel-pt-decoder.h"
>> +#include "intel-pt-decoder/intel-pt-insn-decoder.h"
>> +#include "intel-pt-decoder/intel-pt-pkt-decoder.h"
>> +
>> +#define MAX_TIMESTAMP (~0ULL)
>> +
>> +struct intel_pt {
>> + struct auxtrace auxtrace;
>> + struct auxtrace_queues queues;
>> + struct auxtrace_heap heap;
>> + u32 auxtrace_type;
>> + struct perf_session *session;
>> + struct machine *machine;
>> + struct perf_evsel *switch_evsel;
>> + struct thread *unknown_thread;
>> + bool timeless_decoding;
>> + bool sampling_mode;
>> + bool snapshot_mode;
>> + bool per_cpu_mmaps;
>> + bool have_tsc;
>> + bool data_queued;
>> + bool est_tsc;
>> + bool sync_switch;
>> + bool est_tsc_orig;
>> + int have_sched_switch;
>> + u32 pmu_type;
>> + u64 kernel_start;
>> + u64 switch_ip;
>> + u64 ptss_ip;
>> +
>> + struct perf_tsc_conversion tc;
>> + bool cap_user_time_zero;
>> +
>> + struct itrace_synth_opts synth_opts;
>> +
>> + bool sample_instructions;
>> + u64 instructions_sample_type;
>> + u64 instructions_sample_period;
>> + u64 instructions_id;
>> +
>> + bool sample_branches;
>> + u32 branches_filter;
>> + u64 branches_sample_type;
>> + u64 branches_id;
>> +
>> + bool sample_transactions;
>> + u64 transactions_sample_type;
>> + u64 transactions_id;
>> +
>> + bool synth_needs_swap;
>> +
>> + u64 tsc_bit;
>> + u64 noretcomp_bit;
>> +};
>> +
>> +enum switch_state {
>> + INTEL_PT_SS_NOT_TRACING,
>> + INTEL_PT_SS_UNKNOWN,
>> + INTEL_PT_SS_TRACING,
>> + INTEL_PT_SS_EXPECTING_SWITCH_EVENT,
>> + INTEL_PT_SS_EXPECTING_SWITCH_IP,
>> +};
>> +
>> +struct intel_pt_queue {
>> + struct intel_pt *pt;
>> + unsigned int queue_nr;
>> + struct auxtrace_buffer *buffer;
>> + void *decoder;
>> + const struct intel_pt_state *state;
>> + struct ip_callchain *chain;
>> + union perf_event *event_buf;
>> + bool on_heap;
>> + bool stop;
>> + bool step_through_buffers;
>> + bool use_buffer_pid_tid;
>> + pid_t pid, tid;
>> + int cpu;
>> + int switch_state;
>> + pid_t next_tid;
>> + struct thread *thread;
>> + bool exclude_kernel;
>> + bool have_sample;
>> + u64 time;
>> + u64 timestamp;
>> + u32 flags;
>> + u16 insn_len;
>> +};
>> +
>> +static void intel_pt_dump(struct intel_pt *pt __maybe_unused,
>> + unsigned char *buf, size_t len)
>> +{
>> + struct intel_pt_pkt packet;
>> + size_t pos = 0;
>> + int ret, pkt_len, i;
>> + char desc[INTEL_PT_PKT_DESC_MAX];
>> + const char *color = PERF_COLOR_BLUE;
>> +
>> + color_fprintf(stdout, color,
>> + ". ... Intel Processor Trace data: size %zu bytes\n",
>> + len);
>> +
>> + while (len) {
>> + ret = intel_pt_get_packet(buf, len, &packet);
>> + if (ret > 0)
>> + pkt_len = ret;
>> + else
>> + pkt_len = 1;
>> + printf(".");
>> + color_fprintf(stdout, color, " %08x: ", pos);
>> + for (i = 0; i < pkt_len; i++)
>> + color_fprintf(stdout, color, " %02x", buf[i]);
>> + for (; i < 16; i++)
>> + color_fprintf(stdout, color, " ");
>> + if (ret > 0) {
>> + ret = intel_pt_pkt_desc(&packet, desc,
>> + INTEL_PT_PKT_DESC_MAX);
>> + if (ret > 0)
>> + color_fprintf(stdout, color, " %s\n", desc);
>> + } else {
>> + color_fprintf(stdout, color, " Bad packet!\n");
>> + }
>> + pos += pkt_len;
>> + buf += pkt_len;
>> + len -= pkt_len;
>> + }
>> +}
>> +
>> +static void intel_pt_dump_event(struct intel_pt *pt, unsigned char *buf,
>> + size_t len)
>> +{
>> + printf(".\n");
>> + intel_pt_dump(pt, buf, len);
>> +}
>> +
>> +static int intel_pt_do_fix_overlap(struct intel_pt *pt, struct auxtrace_buffer *a,
>> + struct auxtrace_buffer *b)
>> +{
>> + void *start;
>> +
>> + start = intel_pt_find_overlap(a->data, a->size, b->data, b->size,
>> + pt->have_tsc);
>> + if (!start)
>> + return -EINVAL;
>> + b->use_size = b->data + b->size - start;
>> + b->use_data = start;
>> + return 0;
>> +}
>> +
>> +static void intel_pt_use_buffer_pid_tid(struct intel_pt_queue *ptq,
>> + struct auxtrace_queue *queue,
>> + struct auxtrace_buffer *buffer)
>> +{
>> + if (queue->cpu == -1 && buffer->cpu != -1)
>> + ptq->cpu = buffer->cpu;
>> +
>> + ptq->pid = buffer->pid;
>> + ptq->tid = buffer->tid;
>> +
>> + intel_pt_log("queue %u cpu %d pid %d tid %d\n",
>> + ptq->queue_nr, ptq->cpu, ptq->pid, ptq->tid);
>> +
>> + ptq->thread = NULL;
>> +
>> + if (ptq->tid != -1) {
>> + if (ptq->pid != -1)
>> + ptq->thread = machine__findnew_thread(ptq->pt->machine,
>> + ptq->pid,
>> + ptq->tid);
>> + else
>> + ptq->thread = machine__find_thread(ptq->pt->machine, -1,
>> + ptq->tid);
>> + }
>> +}
>> +
>> +/* This function assumes data is processed sequentially only */
>> +static int intel_pt_get_trace(struct intel_pt_buffer *b, void *data)
>> +{
>> + struct intel_pt_queue *ptq = data;
>> + struct auxtrace_buffer *buffer = ptq->buffer, *old_buffer = buffer;
>> + struct auxtrace_queue *queue;
>> +
>> + if (ptq->stop) {
>> + b->len = 0;
>> + return 0;
>> + }
>> +
>> + queue = &ptq->pt->queues.queue_array[ptq->queue_nr];
>> +
>> + buffer = auxtrace_buffer__next(queue, buffer);
>> + if (!buffer) {
>> + if (old_buffer)
>> + auxtrace_buffer__drop_data(old_buffer);
>> + b->len = 0;
>> + return 0;
>> + }
>> +
>> + ptq->buffer = buffer;
>> +
>> + if (!buffer->data) {
>> + int fd = perf_data_file__fd(ptq->pt->session->file);
>> +
>> + buffer->data = auxtrace_buffer__get_data(buffer, fd);
>> + if (!buffer->data)
>> + return -ENOMEM;
>> + }
>> +
>> + if (ptq->pt->snapshot_mode && !buffer->consecutive && old_buffer &&
>> + intel_pt_do_fix_overlap(ptq->pt, old_buffer, buffer))
>> + return -ENOMEM;
>> +
>> + if (old_buffer)
>> + auxtrace_buffer__drop_data(old_buffer);
>> +
>> + if (buffer->use_data) {
>> + b->len = buffer->use_size;
>> + b->buf = buffer->use_data;
>> + } else {
>> + b->len = buffer->size;
>> + b->buf = buffer->data;
>> + }
>> + b->ref_timestamp = buffer->reference;
>> +
>> + if (!old_buffer || ptq->pt->sampling_mode || (ptq->pt->snapshot_mode &&
>> + !buffer->consecutive)) {
>> + b->consecutive = false;
>> + b->trace_nr = buffer->buffer_nr;
>> + } else {
>> + b->consecutive = true;
>> + }
>> +
>> + if (ptq->use_buffer_pid_tid && (ptq->pid != buffer->pid ||
>> + ptq->tid != buffer->tid))
>> + intel_pt_use_buffer_pid_tid(ptq, queue, buffer);
>> +
>> + if (ptq->step_through_buffers)
>> + ptq->stop = true;
>> +
>> + if (!b->len)
>> + return intel_pt_get_trace(b, data);
>> +
>> + return 0;
>> +}
>> +
>> +struct intel_pt_cache_entry {
>> + struct auxtrace_cache_entry entry;
>> + u64 insn_cnt;
>> + u64 byte_cnt;
>> + enum intel_pt_insn_op op;
>> + enum intel_pt_insn_branch branch;
>> + int length;
>> + int32_t rel;
>> +};
>> +
>> +static int intel_pt_config_div(const char *var, const char *value, void *data)
>> +{
>> + int *d = data;
>> + long val;
>> +
>> + if (!strcmp(var, "intel-pt.cache-divisor")) {
>> + val = strtol(value, NULL, 0);
>> + if (val > 0 && val <= INT_MAX)
>> + *d = val;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static int intel_pt_cache_divisor(void)
>> +{
>> + static int d;
>> +
>> + if (d)
>> + return d;
>> +
>> + perf_config(intel_pt_config_div, &d);
>> +
>> + if (!d)
>> + d = 64;
>> +
>> + return d;
>> +}
>> +
>> +static unsigned int intel_pt_cache_size(struct dso *dso,
>> + struct machine *machine)
>> +{
>> + off_t size;
>> +
>> + size = dso__data_size(dso, machine);
>> + size /= intel_pt_cache_divisor();
>> + if (size < 1000)
>> + return 10;
>> + if (size > (1 << 21))
>> + return 21;
>> + return 32 - __builtin_clz(size);
>> +}
>> +
>> +static struct auxtrace_cache *intel_pt_cache(struct dso *dso,
>> + struct machine *machine)
>> +{
>> + struct auxtrace_cache *c;
>> + unsigned int bits;
>> +
>> + if (dso->auxtrace_cache)
>> + return dso->auxtrace_cache;
>> +
>> + bits = intel_pt_cache_size(dso, machine);
>> +
>> + /* Ignoring cache creation failure */
>> + c = auxtrace_cache__new(bits, sizeof(struct intel_pt_cache_entry), 200);
>> +
>> + dso->auxtrace_cache = c;
>> +
>> + return c;
>> +}
>> +
>> +static int intel_pt_cache_add(struct dso *dso, struct machine *machine,
>> + u64 offset, u64 insn_cnt, u64 byte_cnt,
>> + struct intel_pt_insn *intel_pt_insn)
>> +{
>> + struct auxtrace_cache *c = intel_pt_cache(dso, machine);
>> + struct intel_pt_cache_entry *e;
>> + int err;
>> +
>> + if (!c)
>> + return -ENOMEM;
>> +
>> + e = auxtrace_cache__alloc_entry(c);
>> + if (!e)
>> + return -ENOMEM;
>> +
>> + e->insn_cnt = insn_cnt;
>> + e->byte_cnt = byte_cnt;
>> + e->op = intel_pt_insn->op;
>> + e->branch = intel_pt_insn->branch;
>> + e->length = intel_pt_insn->length;
>> + e->rel = intel_pt_insn->rel;
>> +
>> + err = auxtrace_cache__add(c, offset, &e->entry);
>> + if (err)
>> + auxtrace_cache__free_entry(c, e);
>> +
>> + return err;
>> +}
>> +
>> +static struct intel_pt_cache_entry *
>> +intel_pt_cache_lookup(struct dso *dso, struct machine *machine, u64 offset)
>> +{
>> + struct auxtrace_cache *c = intel_pt_cache(dso, machine);
>> +
>> + if (!c)
>> + return NULL;
>> +
>> + return auxtrace_cache__lookup(dso->auxtrace_cache, offset);
>> +}
>> +
>> +static int intel_pt_walk_next_insn(struct intel_pt_insn *intel_pt_insn,
>> + uint64_t *insn_cnt_ptr, uint64_t *ip,
>> + uint64_t to_ip, uint64_t max_insn_cnt,
>> + void *data)
>> +{
>> + struct intel_pt_queue *ptq = data;
>> + struct machine *machine = ptq->pt->machine;
>> + struct thread *thread;
>> + struct addr_location al;
>> + unsigned char buf[1024];
>> + size_t bufsz;
>> + ssize_t len;
>> + int x86_64;
>> + u8 cpumode;
>> + u64 offset, start_offset, start_ip;
>> + u64 insn_cnt = 0;
>> + bool one_map = true;
>> +
>> + if (to_ip && *ip == to_ip)
>> + goto out_no_cache;
>> +
>> + bufsz = intel_pt_insn_max_size();
>> +
>> + if (*ip >= ptq->pt->kernel_start)
>> + cpumode = PERF_RECORD_MISC_KERNEL;
>> + else
>> + cpumode = PERF_RECORD_MISC_USER;
>> +
>> + thread = ptq->thread;
>> + if (!thread) {
>> + if (cpumode != PERF_RECORD_MISC_KERNEL)
>> + return -EINVAL;
>> + thread = ptq->pt->unknown_thread;
>> + }
>> +
>> + while (1) {
>> + thread__find_addr_map(thread, cpumode, MAP__FUNCTION, *ip, &al);
>> + if (!al.map || !al.map->dso)
>> + return -EINVAL;
>> +
>> + if (al.map->dso->data.status == DSO_DATA_STATUS_ERROR &&
>> + dso__data_status_seen(al.map->dso,
>> + DSO_DATA_STATUS_SEEN_ITRACE))
>> + return -ENOENT;
>> +
>> + offset = al.map->map_ip(al.map, *ip);
>> +
>> + if (!to_ip && one_map) {
>> + struct intel_pt_cache_entry *e;
>> +
>> + e = intel_pt_cache_lookup(al.map->dso, machine, offset);
>> + if (e &&
>> + (!max_insn_cnt || e->insn_cnt <= max_insn_cnt)) {
>> + *insn_cnt_ptr = e->insn_cnt;
>> + *ip += e->byte_cnt;
>> + intel_pt_insn->op = e->op;
>> + intel_pt_insn->branch = e->branch;
>> + intel_pt_insn->length = e->length;
>> + intel_pt_insn->rel = e->rel;
>> + intel_pt_log_insn_no_data(intel_pt_insn, *ip);
>> + return 0;
>> + }
>> + }
>> +
>> + start_offset = offset;
>> + start_ip = *ip;
>> +
>> + /* Load maps to ensure dso->is_64_bit has been updated */
>> + map__load(al.map, machine->symbol_filter);
>> +
>> + x86_64 = al.map->dso->is_64_bit;
>> +
>> + while (1) {
>> + len = dso__data_read_offset(al.map->dso, machine,
>> + offset, buf, bufsz);
>> + if (len <= 0)
>> + return -EINVAL;
>> +
>> + if (intel_pt_get_insn(buf, len, x86_64, intel_pt_insn))
>> + return -EINVAL;
>> +
>> + intel_pt_log_insn(intel_pt_insn, *ip);
>> +
>> + insn_cnt += 1;
>> +
>> + if (intel_pt_insn->branch != INTEL_PT_BR_NO_BRANCH)
>> + goto out;
>> +
>> + if (max_insn_cnt && insn_cnt >= max_insn_cnt)
>> + goto out_no_cache;
>> +
>> + *ip += intel_pt_insn->length;
>> +
>> + if (to_ip && *ip == to_ip)
>> + goto out_no_cache;
>> +
>> + if (*ip >= al.map->end)
>> + break;
>> +
>> + offset += intel_pt_insn->length;
>> + }
>> + one_map = false;
>> + }
>> +out:
>> + *insn_cnt_ptr = insn_cnt;
>> +
>> + if (!one_map)
>> + goto out_no_cache;
>> +
>> + /*
>> + * Didn't lookup in the 'to_ip' case, so do it now to prevent duplicate
>> + * entries.
>> + */
>> + if (to_ip) {
>> + struct intel_pt_cache_entry *e;
>> +
>> + e = intel_pt_cache_lookup(al.map->dso, machine, start_offset);
>> + if (e)
>> + return 0;
>> + }
>> +
>> + /* Ignore cache errors */
>> + intel_pt_cache_add(al.map->dso, machine, start_offset, insn_cnt,
>> + *ip - start_ip, intel_pt_insn);
>> +
>> + return 0;
>> +
>> +out_no_cache:
>> + *insn_cnt_ptr = insn_cnt;
>> + return 0;
>> +}
>> +
>> +static bool intel_pt_get_config(struct intel_pt *pt,
>> + struct perf_event_attr *attr, u64 *config)
>> +{
>> + if (attr->type == pt->pmu_type) {
>> + if (config)
>> + *config = attr->config;
>> + return true;
>> + }
>> +
>> + return false;
>> +}
>> +
>> +static bool intel_pt_exclude_kernel(struct intel_pt *pt)
>> +{
>> + struct perf_evsel *evsel;
>> +
>> + evlist__for_each(pt->session->evlist, evsel) {
>> + if (intel_pt_get_config(pt, &evsel->attr, NULL) &&
>> + !evsel->attr.exclude_kernel)
>> + return false;
>> + }
>> + return true;
>> +}
>> +
>> +static bool intel_pt_return_compression(struct intel_pt *pt)
>> +{
>> + struct perf_evsel *evsel;
>> + u64 config;
>> +
>> + if (!pt->noretcomp_bit)
>> + return true;
>> +
>> + evlist__for_each(pt->session->evlist, evsel) {
>> + if (intel_pt_get_config(pt, &evsel->attr, &config) &&
>> + (config & pt->noretcomp_bit))
>> + return false;
>> + }
>> + return true;
>> +}
>> +
>> +static bool intel_pt_timeless_decoding(struct intel_pt *pt)
>> +{
>> + struct perf_evsel *evsel;
>> + bool timeless_decoding = true;
>> + u64 config;
>> +
>> + if (!pt->tsc_bit || !pt->cap_user_time_zero)
>> + return true;
>> +
>> + evlist__for_each(pt->session->evlist, evsel) {
>> + if (!(evsel->attr.sample_type & PERF_SAMPLE_TIME))
>> + return true;
>> + if (intel_pt_get_config(pt, &evsel->attr, &config)) {
>> + if (config & pt->tsc_bit)
>> + timeless_decoding = false;
>> + else
>> + return true;
>> + }
>> + }
>> + return timeless_decoding;
>> +}
>> +
>> +static bool intel_pt_tracing_kernel(struct intel_pt *pt)
>> +{
>> + struct perf_evsel *evsel;
>> +
>> + evlist__for_each(pt->session->evlist, evsel) {
>> + if (intel_pt_get_config(pt, &evsel->attr, NULL) &&
>> + !evsel->attr.exclude_kernel)
>> + return true;
>> + }
>> + return false;
>> +}
>> +
>> +static bool intel_pt_have_tsc(struct intel_pt *pt)
>> +{
>> + struct perf_evsel *evsel;
>> + bool have_tsc = false;
>> + u64 config;
>> +
>> + if (!pt->tsc_bit)
>> + return false;
>> +
>> + evlist__for_each(pt->session->evlist, evsel) {
>> + if (intel_pt_get_config(pt, &evsel->attr, &config)) {
>> + if (config & pt->tsc_bit)
>> + have_tsc = true;
>> + else
>> + return false;
>> + }
>> + }
>> + return have_tsc;
>> +}
>> +
>> +static u64 intel_pt_ns_to_ticks(const struct intel_pt *pt, u64 ns)
>> +{
>> + u64 quot, rem;
>> +
>> + quot = ns / pt->tc.time_mult;
>> + rem = ns % pt->tc.time_mult;
>> + return (quot << pt->tc.time_shift) + (rem << pt->tc.time_shift) /
>> + pt->tc.time_mult;
>> +}
>> +
>> +static struct intel_pt_queue *intel_pt_alloc_queue(struct intel_pt *pt,
>> + unsigned int queue_nr)
>> +{
>> + struct intel_pt_params params = { .get_trace = 0, };
>> + struct intel_pt_queue *ptq;
>> +
>> + ptq = zalloc(sizeof(struct intel_pt_queue));
>> + if (!ptq)
>> + return NULL;
>> +
>> + if (pt->synth_opts.callchain) {
>> + size_t sz = sizeof(struct ip_callchain);
>> +
>> + sz += pt->synth_opts.callchain_sz * sizeof(u64);
>> + ptq->chain = zalloc(sz);
>> + if (!ptq->chain)
>> + goto out_free;
>> + }
>> +
>> + ptq->event_buf = malloc(PERF_SAMPLE_MAX_SIZE);
>> + if (!ptq->event_buf)
>> + goto out_free;
>> +
>> + ptq->pt = pt;
>> + ptq->queue_nr = queue_nr;
>> + ptq->exclude_kernel = intel_pt_exclude_kernel(pt);
>> + ptq->pid = -1;
>> + ptq->tid = -1;
>> + ptq->cpu = -1;
>> + ptq->next_tid = -1;
>> +
>> + params.get_trace = intel_pt_get_trace;
>> + params.walk_insn = intel_pt_walk_next_insn;
>> + params.data = ptq;
>> + params.return_compression = intel_pt_return_compression(pt);
>> +
>> + if (pt->synth_opts.instructions) {
>> + if (pt->synth_opts.period) {
>> + switch (pt->synth_opts.period_type) {
>> + case PERF_ITRACE_PERIOD_INSTRUCTIONS:
>> + params.period_type =
>> + INTEL_PT_PERIOD_INSTRUCTIONS;
>> + params.period = pt->synth_opts.period;
>> + break;
>> + case PERF_ITRACE_PERIOD_TICKS:
>> + params.period_type = INTEL_PT_PERIOD_TICKS;
>> + params.period = pt->synth_opts.period;
>> + break;
>> + case PERF_ITRACE_PERIOD_NANOSECS:
>> + params.period_type = INTEL_PT_PERIOD_TICKS;
>> + params.period = intel_pt_ns_to_ticks(pt,
>> + pt->synth_opts.period);
>> + break;
>> + default:
>> + break;
>> + }
>> + }
>> +
>> + if (!params.period) {
>> + params.period_type = INTEL_PT_PERIOD_INSTRUCTIONS;
>> + params.period = 1000;
>> + }
>> + }
>> +
>> + ptq->decoder = intel_pt_decoder_new(&params);
>> + if (!ptq->decoder)
>> + goto out_free;
>> +
>> + return ptq;
>> +
>> +out_free:
>> + zfree(&ptq->event_buf);
>> + zfree(&ptq->chain);
>> + free(ptq);
>> + return NULL;
>> +}
>> +
>> +static void intel_pt_free_queue(void *priv)
>> +{
>> + struct intel_pt_queue *ptq = priv;
>> +
>> + if (!ptq)
>> + return;
>> + intel_pt_decoder_free(ptq->decoder);
>> + zfree(&ptq->event_buf);
>> + zfree(&ptq->chain);
>> + free(ptq);
>> +}
>> +
>> +static void intel_pt_set_pid_tid_cpu(struct intel_pt *pt,
>> + struct auxtrace_queue *queue)
>> +{
>> + struct intel_pt_queue *ptq = queue->priv;
>> +
>> + if (queue->tid == -1 || pt->have_sched_switch) {
>> + ptq->tid = machine__get_current_tid(pt->machine, ptq->cpu);
>> + ptq->thread = NULL;
>> + }
>> +
>> + if (!ptq->thread && ptq->tid != -1)
>> + ptq->thread = machine__find_thread(pt->machine, -1, ptq->tid);
>> +
>> + if (ptq->thread) {
>> + ptq->pid = ptq->thread->pid_;
>> + if (queue->cpu == -1)
>> + ptq->cpu = ptq->thread->cpu;
>> + }
>> +}
>> +
>> +static void intel_pt_sample_flags(struct intel_pt_queue *ptq)
>> +{
>> + if (ptq->state->flags & INTEL_PT_ABORT_TX) {
>> + ptq->flags = PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TX_ABORT;
>> + } else if (ptq->state->flags & INTEL_PT_ASYNC) {
>> + if (ptq->state->to_ip)
>> + ptq->flags = PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL |
>> + PERF_IP_FLAG_ASYNC |
>> + PERF_IP_FLAG_INTERRUPT;
>> + else
>> + ptq->flags = PERF_IP_FLAG_BRANCH |
>> + PERF_IP_FLAG_TRACE_END;
>> + ptq->insn_len = 0;
>> + } else {
>> + if (ptq->state->from_ip)
>> + ptq->flags = intel_pt_insn_type(ptq->state->insn_op);
>> + else
>> + ptq->flags = PERF_IP_FLAG_BRANCH |
>> + PERF_IP_FLAG_TRACE_BEGIN;
>> + if (ptq->state->flags & INTEL_PT_IN_TX)
>> + ptq->flags |= PERF_IP_FLAG_IN_TX;
>> + ptq->insn_len = ptq->state->insn_len;
>> + }
>> +}
>> +
>> +static int intel_pt_setup_queue(struct intel_pt *pt,
>> + struct auxtrace_queue *queue,
>> + unsigned int queue_nr)
>> +{
>> + struct intel_pt_queue *ptq = queue->priv;
>> +
>> + if (list_empty(&queue->head))
>> + return 0;
>> +
>> + if (!ptq) {
>> + ptq = intel_pt_alloc_queue(pt, queue_nr);
>> + if (!ptq)
>> + return -ENOMEM;
>> + queue->priv = ptq;
>> +
>> + if (queue->cpu != -1)
>> + ptq->cpu = queue->cpu;
>> + ptq->tid = queue->tid;
>> +
>> + if (pt->sampling_mode) {
>> + if (pt->timeless_decoding)
>> + ptq->step_through_buffers = true;
>> + if (pt->timeless_decoding || !pt->have_sched_switch)
>> + ptq->use_buffer_pid_tid = true;
>> + }
>> + }
>> +
>> + if (!ptq->on_heap &&
>> + (!pt->sync_switch ||
>> + ptq->switch_state != INTEL_PT_SS_EXPECTING_SWITCH_EVENT)) {
>> + const struct intel_pt_state *state;
>> + int ret;
>> +
>> + if (pt->timeless_decoding)
>> + return 0;
>> +
>> + intel_pt_log("queue %u getting timestamp\n", queue_nr);
>> + intel_pt_log("queue %u decoding cpu %d pid %d tid %d\n",
>> + queue_nr, ptq->cpu, ptq->pid, ptq->tid);
>> + while (1) {
>> + state = intel_pt_decode(ptq->decoder);
>> + if (state->err) {
>> + if (state->err == INTEL_PT_ERR_NODATA) {
>> + intel_pt_log("queue %u has no timestamp\n",
>> + queue_nr);
>> + return 0;
>> + }
>> + continue;
>> + }
>> + if (state->timestamp)
>> + break;
>> + }
>> +
>> + ptq->timestamp = state->timestamp;
>> + intel_pt_log("queue %u timestamp 0x%" PRIx64 "\n",
>> + queue_nr, ptq->timestamp);
>> + ptq->state = state;
>> + ptq->have_sample = true;
>> + intel_pt_sample_flags(ptq);
>> + ret = auxtrace_heap__add(&pt->heap, queue_nr, ptq->timestamp);
>> + if (ret)
>> + return ret;
>> + ptq->on_heap = true;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static int intel_pt_setup_queues(struct intel_pt *pt)
>> +{
>> + unsigned int i;
>> + int ret;
>> +
>> + for (i = 0; i < pt->queues.nr_queues; i++) {
>> + ret = intel_pt_setup_queue(pt, &pt->queues.queue_array[i], i);
>> + if (ret)
>> + return ret;
>> + }
>> + return 0;
>> +}
>> +
>> +static int intel_pt_inject_event(union perf_event *event,
>> + struct perf_sample *sample, u64 type,
>> + bool swapped)
>> +{
>> + event->header.size = perf_event__sample_event_size(sample, type, 0);
>> + return perf_event__synthesize_sample(event, type, 0, sample, swapped);
>> +}
>> +
>> +static int intel_pt_synth_branch_sample(struct intel_pt_queue *ptq)
>> +{
>> + int ret;
>> + struct intel_pt *pt = ptq->pt;
>> + union perf_event *event = ptq->event_buf;
>> + struct perf_sample sample = { .ip = 0, };
>> +
>> + event->sample.header.type = PERF_RECORD_SAMPLE;
>> + event->sample.header.misc = PERF_RECORD_MISC_USER;
>> + event->sample.header.size = sizeof(struct perf_event_header);
>> +
>> + if (!pt->timeless_decoding)
>> + sample.time = tsc_to_perf_time(ptq->timestamp, &pt->tc);
>> +
>> + sample.ip = ptq->state->from_ip;
>> + sample.pid = ptq->pid;
>> + sample.tid = ptq->tid;
>> + sample.addr = ptq->state->to_ip;
>> + sample.id = ptq->pt->branches_id;
>> + sample.stream_id = ptq->pt->branches_id;
>> + sample.period = 1;
>> + sample.cpu = ptq->cpu;
>> +
>> + if (pt->branches_filter && !(pt->branches_filter & ptq->flags))
>> + return 0;
>> +
>> + if (pt->synth_opts.inject) {
>> + ret = intel_pt_inject_event(event, &sample,
>> + pt->branches_sample_type,
>> + pt->synth_needs_swap);
>> + if (ret)
>> + return ret;
>> + }
>> +
>> + ret = perf_session__deliver_synth_event(pt->session, event, &sample);
>> + if (ret)
>> + pr_err("Intel Processor Trace: failed to deliver branch event, error %d\n",
>> + ret);
>> +
>> + return ret;
>> +}
>> +
>> +static int intel_pt_synth_instruction_sample(struct intel_pt_queue *ptq)
>> +{
>> + int ret;
>> + struct intel_pt *pt = ptq->pt;
>> + union perf_event *event = ptq->event_buf;
>> + struct perf_sample sample = { .ip = 0, };
>> +
>> + event->sample.header.type = PERF_RECORD_SAMPLE;
>> + event->sample.header.misc = PERF_RECORD_MISC_USER;
>> + event->sample.header.size = sizeof(struct perf_event_header);
>> +
>> + if (!pt->timeless_decoding)
>> + sample.time = tsc_to_perf_time(ptq->timestamp, &pt->tc);
>> +
>> + sample.ip = ptq->state->from_ip;
>> + sample.pid = ptq->pid;
>> + sample.tid = ptq->tid;
>> + sample.addr = ptq->state->to_ip;
>> + sample.id = ptq->pt->instructions_id;
>> + sample.stream_id = ptq->pt->instructions_id;
>> + sample.period = ptq->pt->instructions_sample_period;
>> + sample.cpu = ptq->cpu;
>> +
>> + if (pt->synth_opts.callchain) {
>> + thread_stack__sample(ptq->thread, ptq->chain,
>> + pt->synth_opts.callchain_sz, sample.ip);
>> + sample.callchain = ptq->chain;
>> + }
>> +
>> + if (pt->synth_opts.inject) {
>> + ret = intel_pt_inject_event(event, &sample,
>> + pt->instructions_sample_type,
>> + pt->synth_needs_swap);
>> + if (ret)
>> + return ret;
>> + }
>> +
>> + ret = perf_session__deliver_synth_event(pt->session, event, &sample);
>> + if (ret)
>> + pr_err("Intel Processor Trace: failed to deliver instruction event, error %d\n",
>> + ret);
>> +
>> + return ret;
>> +}
>> +
>> +static int intel_pt_synth_transaction_sample(struct intel_pt_queue *ptq)
>> +{
>> + int ret;
>> + struct intel_pt *pt = ptq->pt;
>> + union perf_event *event = ptq->event_buf;
>> + struct perf_sample sample = { .ip = 0, };
>> +
>> + event->sample.header.type = PERF_RECORD_SAMPLE;
>> + event->sample.header.misc = PERF_RECORD_MISC_USER;
>> + event->sample.header.size = sizeof(struct perf_event_header);
>> +
>> + if (!pt->timeless_decoding)
>> + sample.time = tsc_to_perf_time(ptq->timestamp, &pt->tc);
>> +
>> + sample.ip = ptq->state->from_ip;
>> + sample.pid = ptq->pid;
>> + sample.tid = ptq->tid;
>> + sample.addr = ptq->state->to_ip;
>> + sample.id = ptq->pt->transactions_id;
>> + sample.stream_id = ptq->pt->transactions_id;
>> + sample.period = 1;
>> + sample.cpu = ptq->cpu;
>> + sample.flags = ptq->flags;
>> + sample.insn_len = ptq->insn_len;
>> +
>> + if (pt->synth_opts.callchain) {
>> + thread_stack__sample(ptq->thread, ptq->chain,
>> + pt->synth_opts.callchain_sz, sample.ip);
>> + sample.callchain = ptq->chain;
>> + }
>> +
>> + if (pt->synth_opts.inject) {
>> + ret = intel_pt_inject_event(event, &sample,
>> + pt->transactions_sample_type,
>> + pt->synth_needs_swap);
>> + if (ret)
>> + return ret;
>> + }
>> +
>> + ret = perf_session__deliver_synth_event(pt->session, event, &sample);
>> + if (ret)
>> + pr_err("Intel Processor Trace: failed to deliver transaction event, error %d\n",
>> + ret);
>> +
>> + return ret;
>> +}
>> +
>> +static int intel_pt_synth_error(struct intel_pt *pt, int code, int cpu,
>> + pid_t pid, pid_t tid, u64 ip)
>> +{
>> + union perf_event event;
>> + char msg[MAX_AUXTRACE_ERROR_MSG];
>> + int err;
>> +
>> + intel_pt__strerror(code, msg, MAX_AUXTRACE_ERROR_MSG);
>> +
>> + auxtrace_synth_error(&event.auxtrace_error, PERF_AUXTRACE_ERROR_ITRACE,
>> + code, cpu, pid, tid, ip, msg);
>> +
>> + err = perf_session__deliver_synth_event(pt->session, &event, NULL);
>> + if (err)
>> + pr_err("Intel Processor Trace: failed to deliver error event, error %d\n",
>> + err);
>> +
>> + return err;
>> +}
>> +
>> +static int intel_pt_next_tid(struct intel_pt *pt, struct intel_pt_queue *ptq)
>> +{
>> + struct auxtrace_queue *queue;
>> + pid_t tid = ptq->next_tid;
>> + int err;
>> +
>> + if (tid == -1)
>> + return 0;
>> +
>> + intel_pt_log("switch: cpu %d tid %d\n", ptq->cpu, tid);
>> +
>> + err = machine__set_current_tid(pt->machine, ptq->cpu, -1, tid);
>> +
>> + queue = &pt->queues.queue_array[ptq->queue_nr];
>> + intel_pt_set_pid_tid_cpu(pt, queue);
>> +
>> + ptq->next_tid = -1;
>> +
>> + return err;
>> +}
>> +
>> +static inline bool intel_pt_is_switch_ip(struct intel_pt_queue *ptq, u64 ip)
>> +{
>> + struct intel_pt *pt = ptq->pt;
>> +
>> + return ip == pt->switch_ip &&
>> + (ptq->flags & PERF_IP_FLAG_BRANCH) &&
>> + !(ptq->flags & (PERF_IP_FLAG_CONDITIONAL | PERF_IP_FLAG_ASYNC |
>> + PERF_IP_FLAG_INTERRUPT | PERF_IP_FLAG_TX_ABORT));
>> +}
>> +
>> +static int intel_pt_sample(struct intel_pt_queue *ptq)
>> +{
>> + const struct intel_pt_state *state = ptq->state;
>> + struct intel_pt *pt = ptq->pt;
>> + int err;
>> +
>> + if (!ptq->have_sample)
>> + return 0;
>> +
>> + ptq->have_sample = false;
>> +
>> + if (pt->sample_instructions &&
>> + (state->type & INTEL_PT_INSTRUCTION)) {
>> + err = intel_pt_synth_instruction_sample(ptq);
>> + if (err)
>> + return err;
>> + }
>> +
>> + if (pt->sample_transactions &&
>> + (state->type & INTEL_PT_TRANSACTION)) {
>> + err = intel_pt_synth_transaction_sample(ptq);
>> + if (err)
>> + return err;
>> + }
>> +
>> + if (!(state->type & INTEL_PT_BRANCH))
>> + return 0;
>> +
>> + if (pt->synth_opts.callchain)
>> + thread_stack__event(ptq->thread, ptq->flags, state->from_ip,
>> + state->to_ip, ptq->insn_len,
>> + state->trace_nr);
>> +
>> + if (pt->sample_branches) {
>> + err = intel_pt_synth_branch_sample(ptq);
>> + if (err)
>> + return err;
>> + }
>> +
>> + if (!pt->sync_switch)
>> + return 0;
>> +
>> + if (intel_pt_is_switch_ip(ptq, state->to_ip)) {
>> + switch (ptq->switch_state) {
>> + case INTEL_PT_SS_UNKNOWN:
>> + case INTEL_PT_SS_EXPECTING_SWITCH_IP:
>> + err = intel_pt_next_tid(pt, ptq);
>> + if (err)
>> + return err;
>> + ptq->switch_state = INTEL_PT_SS_TRACING;
>> + break;
>> + default:
>> + ptq->switch_state = INTEL_PT_SS_EXPECTING_SWITCH_EVENT;
>> + return 1;
>> + }
>> + } else if (!state->to_ip) {
>> + ptq->switch_state = INTEL_PT_SS_NOT_TRACING;
>> + } else if (ptq->switch_state == INTEL_PT_SS_NOT_TRACING) {
>> + ptq->switch_state = INTEL_PT_SS_UNKNOWN;
>> + } else if (ptq->switch_state == INTEL_PT_SS_UNKNOWN &&
>> + state->to_ip == pt->ptss_ip &&
>> + (ptq->flags & PERF_IP_FLAG_CALL)) {
>> + ptq->switch_state = INTEL_PT_SS_TRACING;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static u64 intel_pt_switch_ip(struct machine *machine, u64 *ptss_ip)
>> +{
>> + struct map *map;
>> + struct symbol *sym, *start;
>> + u64 ip, switch_ip = 0;
>> +
>> + if (ptss_ip)
>> + *ptss_ip = 0;
>> +
>> + map = machine__kernel_map(machine, MAP__FUNCTION);
>> + if (!map)
>> + return 0;
>> +
>> + if (map__load(map, machine->symbol_filter))
>> + return 0;
>> +
>> + start = dso__first_symbol(map->dso, MAP__FUNCTION);
>> +
>> + for (sym = start; sym; sym = dso__next_symbol(sym)) {
>> + if (sym->binding == STB_GLOBAL &&
>> + !strcmp(sym->name, "__switch_to")) {
>> + ip = map->unmap_ip(map, sym->start);
>> + if (ip >= map->start && ip < map->end) {
>> + switch_ip = ip;
>> + break;
>> + }
>> + }
>> + }
>> +
>> + if (!switch_ip || !ptss_ip)
>> + return 0;
>> +
>> + for (sym = start; sym; sym = dso__next_symbol(sym)) {
>> + if (!strcmp(sym->name, "perf_trace_sched_switch")) {
>> + ip = map->unmap_ip(map, sym->start);
>> + if (ip >= map->start && ip < map->end) {
>> + *ptss_ip = ip;
>> + break;
>> + }
>> + }
>> + }
>> +
>> + return switch_ip;
>> +}
>> +
>> +static int intel_pt_run_decoder(struct intel_pt_queue *ptq, u64 *timestamp)
>> +{
>> + const struct intel_pt_state *state = ptq->state;
>> + struct intel_pt *pt = ptq->pt;
>> + int err;
>> +
>> + if (!pt->kernel_start) {
>> + pt->kernel_start = machine__kernel_start(pt->machine);
>> + if (pt->per_cpu_mmaps && pt->have_sched_switch &&
>> + !pt->timeless_decoding && intel_pt_tracing_kernel(pt) &&
>> + !pt->sampling_mode) {
>> + pt->switch_ip = intel_pt_switch_ip(pt->machine,
>> + &pt->ptss_ip);
>> + if (pt->switch_ip) {
>> + intel_pt_log("switch_ip: %"PRIx64" ptss_ip: %"PRIx64"\n",
>> + pt->switch_ip, pt->ptss_ip);
>> + pt->sync_switch = true;
>> + pt->est_tsc_orig = pt->est_tsc;
>> + pt->est_tsc = false;
>> + }
>> + }
>> + }
>> +
>> + intel_pt_log("queue %u decoding cpu %d pid %d tid %d\n",
>> + ptq->queue_nr, ptq->cpu, ptq->pid, ptq->tid);
>> + while (1) {
>> + err = intel_pt_sample(ptq);
>> + if (err)
>> + return err;
>> +
>> + state = intel_pt_decode(ptq->decoder);
>> + if (state->err) {
>> + if (state->err == INTEL_PT_ERR_NODATA)
>> + return 1;
>> + if (pt->sync_switch &&
>> + state->from_ip >= pt->kernel_start) {
>> + pt->sync_switch = false;
>> + pt->est_tsc = pt->est_tsc_orig;
>> + intel_pt_next_tid(pt, ptq);
>> + }
>> + if (pt->synth_opts.errors) {
>> + err = intel_pt_synth_error(pt, state->err,
>> + ptq->cpu, ptq->pid,
>> + ptq->tid,
>> + state->from_ip);
>> + if (err)
>> + return err;
>> + }
>> + continue;
>> + }
>> +
>> + ptq->state = state;
>> + ptq->have_sample = true;
>> + intel_pt_sample_flags(ptq);
>> +
>> + /* Use estimated TSC upon return to user space */
>> + if (pt->est_tsc) {
>> + if (state->from_ip >= pt->kernel_start &&
>> + state->to_ip &&
>> + state->to_ip < pt->kernel_start)
>> + ptq->timestamp = state->est_timestamp;
>> + else if (state->timestamp > ptq->timestamp)
>> + ptq->timestamp = state->timestamp;
>> + /* Use estimated TSC in unknown switch state */
>> + } else if (pt->sync_switch &&
>> + ptq->switch_state == INTEL_PT_SS_UNKNOWN &&
>> + state->to_ip == pt->switch_ip &&
>> + (ptq->flags & PERF_IP_FLAG_CALL) &&
>> + ptq->next_tid == -1) {
>> + ptq->timestamp = state->est_timestamp;
>> + } else if (state->timestamp > ptq->timestamp) {
>> + ptq->timestamp = state->timestamp;
>> + }
>> +
>> + if (!pt->timeless_decoding && ptq->timestamp >= *timestamp) {
>> + *timestamp = ptq->timestamp;
>> + return 0;
>> + }
>> + }
>> + return 0;
>> +}
>> +
>> +static inline int intel_pt_update_queues(struct intel_pt *pt)
>> +{
>> + if (pt->queues.new_data) {
>> + pt->queues.new_data = false;
>> + return intel_pt_setup_queues(pt);
>> + }
>> + return 0;
>> +}
>> +
>> +static int intel_pt_process_queues(struct intel_pt *pt, u64 timestamp)
>> +{
>> + unsigned int queue_nr;
>> + u64 ts;
>> + int ret;
>> +
>> + while (1) {
>> + struct auxtrace_queue *queue;
>> + struct intel_pt_queue *ptq;
>> +
>> + if (!pt->heap.heap_cnt)
>> + return 0;
>> +
>> + if (pt->heap.heap_array[0].ordinal >= timestamp)
>> + return 0;
>> +
>> + queue_nr = pt->heap.heap_array[0].queue_nr;
>> + queue = &pt->queues.queue_array[queue_nr];
>> + ptq = queue->priv;
>> +
>> + intel_pt_log("queue %u processing 0x%" PRIx64 " to 0x%" PRIx64 "\n",
>> + queue_nr, pt->heap.heap_array[0].ordinal,
>> + timestamp);
>> +
>> + auxtrace_heap__pop(&pt->heap);
>> +
>> + if (pt->heap.heap_cnt) {
>> + ts = pt->heap.heap_array[0].ordinal + 1;
>> + if (ts > timestamp)
>> + ts = timestamp;
>> + } else {
>> + ts = timestamp;
>> + }
>> +
>> + intel_pt_set_pid_tid_cpu(pt, queue);
>> +
>> + ret = intel_pt_run_decoder(ptq, &ts);
>> +
>> + if (ret < 0) {
>> + auxtrace_heap__add(&pt->heap, queue_nr, ts);
>> + return ret;
>> + }
>> +
>> + if (!ret) {
>> + ret = auxtrace_heap__add(&pt->heap, queue_nr, ts);
>> + if (ret < 0)
>> + return ret;
>> + } else {
>> + ptq->on_heap = false;
>> + }
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static int intel_pt_process_timeless_queues(struct intel_pt *pt, pid_t tid,
>> + u64 time_)
>> +{
>> + struct auxtrace_queues *queues = &pt->queues;
>> + unsigned int i;
>> + u64 ts = 0;
>> +
>> + for (i = 0; i < queues->nr_queues; i++) {
>> + struct auxtrace_queue *queue = &pt->queues.queue_array[i];
>> + struct intel_pt_queue *ptq = queue->priv;
>> +
>> + if (ptq && (tid == -1 || ptq->tid == tid)) {
>> + ptq->time = time_;
>> + intel_pt_set_pid_tid_cpu(pt, queue);
>> + intel_pt_run_decoder(ptq, &ts);
>> + }
>> + }
>> + return 0;
>> +}
>> +
>> +static int intel_pt_lost(struct intel_pt *pt, struct perf_sample *sample)
>> +{
>> + return intel_pt_synth_error(pt, INTEL_PT_ERR_LOST, sample->cpu,
>> + sample->pid, sample->tid, 0);
>> +}
>> +
>> +static struct intel_pt_queue *intel_pt_cpu_to_ptq(struct intel_pt *pt, int cpu)
>> +{
>> + unsigned i, j;
>> +
>> + if (cpu < 0 || !pt->queues.nr_queues)
>> + return NULL;
>> +
>> + if ((unsigned)cpu >= pt->queues.nr_queues)
>> + i = pt->queues.nr_queues - 1;
>> + else
>> + i = cpu;
>> +
>> + if (pt->queues.queue_array[i].cpu == cpu)
>> + return pt->queues.queue_array[i].priv;
>> +
>> + for (j = 0; i > 0; j++) {
>> + if (pt->queues.queue_array[--i].cpu == cpu)
>> + return pt->queues.queue_array[i].priv;
>> + }
>> +
>> + for (; j < pt->queues.nr_queues; j++) {
>> + if (pt->queues.queue_array[j].cpu == cpu)
>> + return pt->queues.queue_array[j].priv;
>> + }
>> +
>> + return NULL;
>> +}
>> +
>> +static int intel_pt_process_switch(struct intel_pt *pt,
>> + struct perf_sample *sample)
>> +{
>> + struct intel_pt_queue *ptq;
>> + struct perf_evsel *evsel;
>> + pid_t tid;
>> + int cpu, err;
>> +
>> + evsel = perf_evlist__id2evsel(pt->session->evlist, sample->id);
>> + if (evsel != pt->switch_evsel)
>> + return 0;
>> +
>> + tid = perf_evsel__intval(evsel, sample, "next_pid");
>> + cpu = sample->cpu;
>> +
>> + intel_pt_log("sched_switch: cpu %d tid %d time %"PRIu64" tsc %#"PRIx64"\n",
>> + cpu, tid, sample->time, perf_time_to_tsc(sample->time,
>> + &pt->tc));
>> +
>> + if (!pt->sync_switch)
>> + goto out;
>> +
>> + ptq = intel_pt_cpu_to_ptq(pt, cpu);
>> + if (!ptq)
>> + goto out;
>> +
>> + switch (ptq->switch_state) {
>> + case INTEL_PT_SS_NOT_TRACING:
>> + ptq->next_tid = -1;
>> + break;
>> + case INTEL_PT_SS_UNKNOWN:
>> + case INTEL_PT_SS_TRACING:
>> + ptq->next_tid = tid;
>> + ptq->switch_state = INTEL_PT_SS_EXPECTING_SWITCH_IP;
>> + return 0;
>> + case INTEL_PT_SS_EXPECTING_SWITCH_EVENT:
>> + if (!ptq->on_heap) {
>> + ptq->timestamp = perf_time_to_tsc(sample->time,
>> + &pt->tc);
>> + err = auxtrace_heap__add(&pt->heap, ptq->queue_nr,
>> + ptq->timestamp);
>> + if (err)
>> + return err;
>> + ptq->on_heap = true;
>> + }
>> + ptq->switch_state = INTEL_PT_SS_TRACING;
>> + break;
>> + case INTEL_PT_SS_EXPECTING_SWITCH_IP:
>> + ptq->next_tid = tid;
>> + intel_pt_log("ERROR: cpu %d expecting switch ip\n", cpu);
>> + break;
>> + default:
>> + break;
>> + }
>> +out:
>> + return machine__set_current_tid(pt->machine, cpu, -1, tid);
>> +}
>> +
>> +static int intel_pt_process_itrace_start(struct intel_pt *pt,
>> + union perf_event *event,
>> + struct perf_sample *sample)
>> +{
>> + if (!pt->per_cpu_mmaps)
>> + return 0;
>> +
>> + intel_pt_log("itrace_start: cpu %d pid %d tid %d time %"PRIu64" tsc %#"PRIx64"\n",
>> + sample->cpu, event->itrace_start.pid,
>> + event->itrace_start.tid, sample->time,
>> + perf_time_to_tsc(sample->time, &pt->tc));
>> +
>> + return machine__set_current_tid(pt->machine, sample->cpu,
>> + event->itrace_start.pid,
>> + event->itrace_start.tid);
>> +}
>> +
>> +static int intel_pt_process_event(struct perf_session *session,
>> + union perf_event *event,
>> + struct perf_sample *sample,
>> + struct perf_tool *tool)
>> +{
>> + struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt,
>> + auxtrace);
>> + u64 timestamp;
>> + int err = 0;
>> +
>> + if (dump_trace)
>> + return 0;
>> +
>> + if (!tool->ordered_events) {
>> + pr_err("Intel Processor Trace requires ordered events\n");
>> + return -EINVAL;
>> + }
>> +
>> + if (sample->time)
>> + timestamp = perf_time_to_tsc(sample->time, &pt->tc);
>> + else
>> + timestamp = 0;
>> +
>> + if (timestamp || pt->timeless_decoding) {
>> + err = intel_pt_update_queues(pt);
>> + if (err)
>> + return err;
>> + }
>> +
>> + if (pt->timeless_decoding) {
>> + if (event->header.type == PERF_RECORD_EXIT) {
>> + err = intel_pt_process_timeless_queues(pt,
>> + event->comm.tid,
>> + sample->time);
>> + }
>> + } else if (timestamp) {
>> + err = intel_pt_process_queues(pt, timestamp);
>> + }
>> + if (err)
>> + return err;
>> +
>> + if (event->header.type == PERF_RECORD_AUX &&
>> + (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) &&
>> + pt->synth_opts.errors)
>> + err = intel_pt_lost(pt, sample);
>> +
>> + if (pt->switch_evsel && event->header.type == PERF_RECORD_SAMPLE)
>> + err = intel_pt_process_switch(pt, sample);
>> + else if (event->header.type == PERF_RECORD_ITRACE_START)
>> + err = intel_pt_process_itrace_start(pt, event, sample);
>> +
>> + return err;
>> +}
>> +
>> +static int intel_pt_flush(struct perf_session *session, struct perf_tool *tool)
>> +{
>> + struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt,
>> + auxtrace);
>> + int ret;
>> +
>> + if (dump_trace)
>> + return 0;
>> +
>> + if (!tool->ordered_events)
>> + return -EINVAL;
>> +
>> + ret = intel_pt_update_queues(pt);
>> + if (ret < 0)
>> + return ret;
>> +
>> + if (pt->timeless_decoding)
>> + return intel_pt_process_timeless_queues(pt, -1,
>> + MAX_TIMESTAMP - 1);
>> +
>> + return intel_pt_process_queues(pt, MAX_TIMESTAMP);
>> +}
>> +
>> +static void intel_pt_free_events(struct perf_session *session)
>> +{
>> + struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt,
>> + auxtrace);
>> + struct auxtrace_queues *queues = &pt->queues;
>> + unsigned int i;
>> +
>> + for (i = 0; i < queues->nr_queues; i++) {
>> + intel_pt_free_queue(queues->queue_array[i].priv);
>> + queues->queue_array[i].priv = NULL;
>> + }
>> + intel_pt_log_disable();
>> + auxtrace_queues__free(queues);
>> +}
>> +
>> +static void intel_pt_free(struct perf_session *session)
>> +{
>> + struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt,
>> + auxtrace);
>> +
>> + auxtrace_heap__free(&pt->heap);
>> + intel_pt_free_events(session);
>> + session->auxtrace = NULL;
>> + thread__delete(pt->unknown_thread);
>> + free(pt);
>> +}
>> +
>> +static int intel_pt_process_auxtrace_event(struct perf_session *session,
>> + union perf_event *event,
>> + struct perf_tool *tool __maybe_unused)
>> +{
>> + struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt,
>> + auxtrace);
>> +
>> + if (pt->sampling_mode)
>> + return 0;
>> +
>> + if (!pt->data_queued) {
>> + struct auxtrace_buffer *buffer;
>> + off_t data_offset;
>> + int fd = perf_data_file__fd(session->file);
>> + int err;
>> +
>> + if (perf_data_file__is_pipe(session->file)) {
>> + data_offset = 0;
>> + } else {
>> + data_offset = lseek(fd, 0, SEEK_CUR);
>> + if (data_offset == -1)
>> + return -errno;
>> + }
>> +
>> + err = auxtrace_queues__add_event(&pt->queues, session, event,
>> + data_offset, &buffer);
>> + if (err)
>> + return err;
>> +
>> + /* Dump here now we have copied a piped trace out of the pipe */
>> + if (dump_trace) {
>> + if (auxtrace_buffer__get_data(buffer, fd)) {
>> + intel_pt_dump_event(pt, buffer->data,
>> + buffer->size);
>> + auxtrace_buffer__put_data(buffer);
>> + }
>> + }
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +struct intel_pt_synth {
>> + struct perf_tool dummy_tool;
>> + struct perf_session *session;
>> +};
>> +
>> +static int intel_pt_event_synth(struct perf_tool *tool,
>> + union perf_event *event,
>> + struct perf_sample *sample __maybe_unused,
>> + struct machine *machine __maybe_unused)
>> +{
>> + struct intel_pt_synth *intel_pt_synth =
>> + container_of(tool, struct intel_pt_synth, dummy_tool);
>> +
>> + return perf_session__deliver_synth_event(intel_pt_synth->session, event,
>> + NULL);
>> +}
>> +
>> +static int intel_pt_synth_event(struct perf_session *session,
>> + struct perf_event_attr *attr, u64 id)
>> +{
>> + struct intel_pt_synth intel_pt_synth;
>> +
>> + memset(&intel_pt_synth, 0, sizeof(struct intel_pt_synth));
>> + intel_pt_synth.session = session;
>> +
>> + return perf_event__synthesize_attr(&intel_pt_synth.dummy_tool, attr, 1,
>> + &id, intel_pt_event_synth);
>> +}
>> +
>> +static int intel_pt_synth_events(struct intel_pt *pt,
>> + struct perf_session *session)
>> +{
>> + struct perf_evlist *evlist = session->evlist;
>> + struct perf_evsel *evsel;
>> + struct perf_event_attr attr;
>> + bool found = false;
>> + u64 id;
>> + int err;
>> +
>> + evlist__for_each(evlist, evsel) {
>> + if (evsel->attr.type == pt->pmu_type && evsel->ids) {
>> + found = true;
>> + break;
>> + }
>> + }
>> +
>> + if (!found) {
>> + pr_debug("There are no selected events with Intel Processor Trace data\n");
>> + return 0;
>> + }
>> +
>> + memset(&attr, 0, sizeof(struct perf_event_attr));
>> + attr.size = sizeof(struct perf_event_attr);
>> + attr.type = PERF_TYPE_HARDWARE;
>> + attr.sample_type = evsel->attr.sample_type & PERF_SAMPLE_MASK;
>> + attr.sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID |
>> + PERF_SAMPLE_PERIOD;
>> + if (pt->timeless_decoding)
>> + attr.sample_type &= ~(u64)PERF_SAMPLE_TIME;
>> + else
>> + attr.sample_type |= PERF_SAMPLE_TIME;
>> + if (!pt->per_cpu_mmaps)
>> + attr.sample_type &= ~(u64)PERF_SAMPLE_CPU;
>> + attr.exclude_user = evsel->attr.exclude_user;
>> + attr.exclude_kernel = evsel->attr.exclude_kernel;
>> + attr.exclude_hv = evsel->attr.exclude_hv;
>> + attr.exclude_host = evsel->attr.exclude_host;
>> + attr.exclude_guest = evsel->attr.exclude_guest;
>> + attr.sample_id_all = evsel->attr.sample_id_all;
>> + attr.read_format = evsel->attr.read_format;
>> +
>> + id = evsel->id[0] + 1000000000;
>> + if (!id)
>> + id = 1;
>> +
>> + if (pt->synth_opts.instructions) {
>> + attr.config = PERF_COUNT_HW_INSTRUCTIONS;
>> + if (pt->synth_opts.period_type == PERF_ITRACE_PERIOD_NANOSECS)
>> + attr.sample_period =
>> + intel_pt_ns_to_ticks(pt, pt->synth_opts.period);
>> + else
>> + attr.sample_period = pt->synth_opts.period;
>> + pt->instructions_sample_period = attr.sample_period;
>> + if (pt->synth_opts.callchain)
>> + attr.sample_type |= PERF_SAMPLE_CALLCHAIN;
>> + pr_debug("Synthesizing 'instructions' event with id %" PRIu64 " sample type %#" PRIx64 "\n",
>> + id, (u64)attr.sample_type);
>> + err = intel_pt_synth_event(session, &attr, id);
>> + if (err) {
>> + pr_err("%s: failed to synthesize 'instructions' event type\n",
>> + __func__);
>> + return err;
>> + }
>> + pt->sample_instructions = true;
>> + pt->instructions_sample_type = attr.sample_type;
>> + pt->instructions_id = id;
>> + id += 1;
>> + }
>> +
>> + if (pt->synth_opts.transactions) {
>> + attr.config = PERF_COUNT_HW_INSTRUCTIONS;
>> + attr.sample_period = 1;
>> + if (pt->synth_opts.callchain)
>> + attr.sample_type |= PERF_SAMPLE_CALLCHAIN;
>> + pr_debug("Synthesizing 'transactions' event with id %" PRIu64 " sample type %#" PRIx64 "\n",
>> + id, (u64)attr.sample_type);
>> + err = intel_pt_synth_event(session, &attr, id);
>> + if (err) {
>> + pr_err("%s: failed to synthesize 'transactions' event type\n",
>> + __func__);
>> + return err;
>> + }
>> + pt->sample_transactions = true;
>> + pt->transactions_id = id;
>> + id += 1;
>> + evlist__for_each(evlist, evsel) {
>> + if (evsel->id && evsel->id[0] == pt->transactions_id) {
>> + if (evsel->name)
>> + zfree(&evsel->name);
>> + evsel->name = strdup("transactions");
>> + break;
>> + }
>> + }
>> + }
>> +
>> + if (pt->synth_opts.branches) {
>> + attr.config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS;
>> + attr.sample_period = 1;
>> + attr.sample_type |= PERF_SAMPLE_ADDR;
>> + attr.sample_type &= ~(u64)PERF_SAMPLE_CALLCHAIN;
>> + pr_debug("Synthesizing 'branches' event with id %" PRIu64 " sample type %#" PRIx64 "\n",
>> + id, (u64)attr.sample_type);
>> + err = intel_pt_synth_event(session, &attr, id);
>> + if (err) {
>> + pr_err("%s: failed to synthesize 'branches' event type\n",
>> + __func__);
>> + return err;
>> + }
>> + pt->sample_branches = true;
>> + pt->branches_sample_type = attr.sample_type;
>> + pt->branches_id = id;
>> + }
>> +
>> + pt->synth_needs_swap = evsel->needs_swap;
>> +
>> + return 0;
>> +}
>> +
>> +static struct perf_evsel *intel_pt_find_sched_switch(struct perf_evlist *evlist)
>> +{
>> + struct perf_evsel *evsel;
>> +
>> + evlist__for_each_reverse(evlist, evsel) {
>> + const char *name = perf_evsel__name(evsel);
>> +
>> + if (!strcmp(name, "sched:sched_switch"))
>> + return evsel;
>> + }
>> +
>> + return NULL;
>> +}
>> +
>> +static const char * const intel_pt_info_fmts[] = {
>> + [INTEL_PT_PMU_TYPE] = " PMU Type %"PRId64"\n",
>> + [INTEL_PT_TIME_SHIFT] = " Time Shift %"PRIu64"\n",
>> + [INTEL_PT_TIME_MULT] = " Time Muliplier %"PRIu64"\n",
>> + [INTEL_PT_TIME_ZERO] = " Time Zero %"PRIu64"\n",
>> + [INTEL_PT_CAP_USER_TIME_ZERO] = " Cap Time Zero %"PRId64"\n",
>> + [INTEL_PT_TSC_BIT] = " TSC bit %#"PRIx64"\n",
>> + [INTEL_PT_NORETCOMP_BIT] = " NoRETComp bit %#"PRIx64"\n",
>> + [INTEL_PT_HAVE_SCHED_SWITCH] = " Have sched_switch %"PRId64"\n",
>> + [INTEL_PT_SNAPSHOT_MODE] = " Snapshot mode %"PRId64"\n",
>> + [INTEL_PT_PER_CPU_MMAPS] = " Per-cpu maps %"PRId64"\n",
>> +};
>> +
>> +static void intel_pt_print_info(u64 *arr, int start, int finish)
>> +{
>> + int i;
>> +
>> + if (!dump_trace)
>> + return;
>> +
>> + for (i = start; i <= finish; i++)
>> + fprintf(stdout, intel_pt_info_fmts[i], arr[i]);
>> +}
>> +
>> +int intel_pt_process_auxtrace_info(union perf_event *event,
>> + struct perf_session *session)
>> +{
>> + struct auxtrace_info_event *auxtrace_info = &event->auxtrace_info;
>> + size_t min_sz = sizeof(u64) * INTEL_PT_PER_CPU_MMAPS;
>> + struct intel_pt *pt;
>> + int err;
>> +
>> + if (auxtrace_info->header.size < sizeof(struct auxtrace_info_event) +
>> + min_sz)
>> + return -EINVAL;
>> +
>> + pt = zalloc(sizeof(struct intel_pt));
>> + if (!pt)
>> + return -ENOMEM;
>> +
>> + err = auxtrace_queues__init(&pt->queues);
>> + if (err)
>> + goto err_free;
>> +
>> + intel_pt_log_set_name(INTEL_PT_PMU_NAME);
>> +
>> + pt->session = session;
>> + pt->machine = &session->machines.host; /* No kvm support */
>> + pt->auxtrace_type = auxtrace_info->type;
>> + pt->pmu_type = auxtrace_info->priv[INTEL_PT_PMU_TYPE];
>> + pt->tc.time_shift = auxtrace_info->priv[INTEL_PT_TIME_SHIFT];
>> + pt->tc.time_mult = auxtrace_info->priv[INTEL_PT_TIME_MULT];
>> + pt->tc.time_zero = auxtrace_info->priv[INTEL_PT_TIME_ZERO];
>> + pt->cap_user_time_zero = auxtrace_info->priv[INTEL_PT_CAP_USER_TIME_ZERO];
>> + pt->tsc_bit = auxtrace_info->priv[INTEL_PT_TSC_BIT];
>> + pt->noretcomp_bit = auxtrace_info->priv[INTEL_PT_NORETCOMP_BIT];
>> + pt->have_sched_switch = auxtrace_info->priv[INTEL_PT_HAVE_SCHED_SWITCH];
>> + pt->snapshot_mode = auxtrace_info->priv[INTEL_PT_SNAPSHOT_MODE];
>> + pt->per_cpu_mmaps = auxtrace_info->priv[INTEL_PT_PER_CPU_MMAPS];
>> + intel_pt_print_info(&auxtrace_info->priv[0], INTEL_PT_PMU_TYPE,
>> + INTEL_PT_PER_CPU_MMAPS);
>> +
>> + pt->timeless_decoding = intel_pt_timeless_decoding(pt);
>> + pt->have_tsc = intel_pt_have_tsc(pt);
>> + pt->sampling_mode = false;
>> + pt->est_tsc = pt->per_cpu_mmaps && !pt->timeless_decoding;
>> +
>> + pt->unknown_thread = thread__new(999999999, 999999999);
>> + if (!pt->unknown_thread) {
>> + err = -ENOMEM;
>> + goto err_free_queues;
>> + }
>> + err = thread__set_comm(pt->unknown_thread, "unknown", 0);
>> + if (err)
>> + goto err_delete_thread;
>> + if (thread__init_map_groups(pt->unknown_thread, pt->machine)) {
>> + err = -ENOMEM;
>> + goto err_delete_thread;
>> + }
>> +
>> + pt->auxtrace.process_event = intel_pt_process_event;
>> + pt->auxtrace.process_auxtrace_event = intel_pt_process_auxtrace_event;
>> + pt->auxtrace.flush_events = intel_pt_flush;
>> + pt->auxtrace.free_events = intel_pt_free_events;
>> + pt->auxtrace.free = intel_pt_free;
>> + session->auxtrace = &pt->auxtrace;
>> +
>> + if (dump_trace)
>> + return 0;
>> +
>> + if (pt->have_sched_switch == 1) {
>> + pt->switch_evsel = intel_pt_find_sched_switch(session->evlist);
>> + if (!pt->switch_evsel) {
>> + pr_err("%s: missing sched_switch event\n", __func__);
>> + goto err_delete_thread;
>> + }
>> + }
>> +
>> + if (session->itrace_synth_opts && session->itrace_synth_opts->set) {
>> + pt->synth_opts = *session->itrace_synth_opts;
>> + } else {
>> + itrace_synth_opts__set_default(&pt->synth_opts);
>> + if (use_browser != -1) {
>> + pt->synth_opts.branches = false;
>> + pt->synth_opts.callchain = true;
>> + }
>> + }
>> +
>> + if (pt->synth_opts.log)
>> + intel_pt_log_enable();
>> +
>> + if (pt->synth_opts.calls)
>> + pt->branches_filter |= PERF_IP_FLAG_CALL | PERF_IP_FLAG_ASYNC |
>> + PERF_IP_FLAG_TRACE_END;
>> + if (pt->synth_opts.returns)
>> + pt->branches_filter |= PERF_IP_FLAG_RETURN |
>> + PERF_IP_FLAG_TRACE_BEGIN;
>> +
>> + if (pt->synth_opts.callchain && !symbol_conf.use_callchain) {
>> + symbol_conf.use_callchain = true;
>> + if (callchain_register_param(&callchain_param) < 0) {
>> + symbol_conf.use_callchain = false;
>> + pt->synth_opts.callchain = false;
>> + }
>> + }
>> +
>> + err = intel_pt_synth_events(pt, session);
>> + if (err)
>> + goto err_delete_thread;
>> +
>> + err = auxtrace_queues__process_index(&pt->queues, session);
>> + if (err)
>> + goto err_delete_thread;
>> +
>> + if (pt->queues.populated)
>> + pt->data_queued = true;
>> +
>> + if (pt->timeless_decoding)
>> + pr_debug2("Intel PT decoding without timestamps\n");
>> +
>> + return 0;
>> +
>> +err_delete_thread:
>> + thread__delete(pt->unknown_thread);
>> +err_free_queues:
>> + intel_pt_log_disable();
>> + auxtrace_queues__free(&pt->queues);
>> + session->auxtrace = NULL;
>> +err_free:
>> + free(pt);
>> + return err;
>> +}
>> diff --git a/tools/perf/util/intel-pt.h b/tools/perf/util/intel-pt.h
>> new file mode 100644
>> index 0000000..a1bfe93
>> --- /dev/null
>> +++ b/tools/perf/util/intel-pt.h
>> @@ -0,0 +1,51 @@
>> +/*
>> + * intel_pt.h: Intel Processor Trace support
>> + * Copyright (c) 2013-2015, Intel Corporation.
>> + *
>> + * This program is free software; you can redistribute it and/or modify it
>> + * under the terms and conditions of the GNU General Public License,
>> + * version 2, as published by the Free Software Foundation.
>> + *
>> + * This program is distributed in the hope it will be useful, but WITHOUT
>> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
>> + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
>> + * more details.
>> + *
>> + */
>> +
>> +#ifndef INCLUDE__PERF_INTEL_PT_H__
>> +#define INCLUDE__PERF_INTEL_PT_H__
>> +
>> +#define INTEL_PT_PMU_NAME "intel_pt"
>> +
>> +enum {
>> + INTEL_PT_PMU_TYPE,
>> + INTEL_PT_TIME_SHIFT,
>> + INTEL_PT_TIME_MULT,
>> + INTEL_PT_TIME_ZERO,
>> + INTEL_PT_CAP_USER_TIME_ZERO,
>> + INTEL_PT_TSC_BIT,
>> + INTEL_PT_NORETCOMP_BIT,
>> + INTEL_PT_HAVE_SCHED_SWITCH,
>> + INTEL_PT_SNAPSHOT_MODE,
>> + INTEL_PT_PER_CPU_MMAPS,
>> + INTEL_PT_AUXTRACE_PRIV_MAX,
>> +};
>> +
>> +#define INTEL_PT_AUXTRACE_PRIV_SIZE (INTEL_PT_AUXTRACE_PRIV_MAX * sizeof(u64))
>> +
>> +struct auxtrace_record;
>> +struct perf_tool;
>> +union perf_event;
>> +struct perf_session;
>> +struct perf_event_attr;
>> +struct perf_pmu;
>> +
>> +struct auxtrace_record *intel_pt_recording_init(int *err);
>> +
>> +int intel_pt_process_auxtrace_info(union perf_event *event,
>> + struct perf_session *session);
>> +
>> +struct perf_event_attr *intel_pt_pmu_default_config(struct perf_pmu *pmu);
>> +
>> +#endif
>> --
>> 1.9.1
--
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