Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0-only
/*
 * intel_pt.c: Intel Processor Trace support
 * Copyright (c) 2013-2015, Intel Corporation.
 */
 
#include <inttypes.h>
#include <stdio.h>
#include <stdbool.h>
#include <errno.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/zalloc.h>
 
#include "session.h"
#include "machine.h"
#include "memswap.h"
#include "sort.h"
#include "tool.h"
#include "event.h"
#include "evlist.h"
#include "evsel.h"
#include "map.h"
#include "color.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 "config.h"
#include "util/perf_api_probe.h"
#include "util/synthetic-events.h"
#include "time-utils.h"
 
#include "../arch/x86/include/uapi/asm/perf_regs.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 range {
<------>u64 start;
<------>u64 end;
};
 
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 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 mispred_all;
<------>bool use_thread_stack;
<------>bool callstack;
<------>unsigned int br_stack_sz;
<------>unsigned int br_stack_sz_plus;
<------>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_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 sample_ptwrites;
<------>u64 ptwrites_sample_type;
<------>u64 ptwrites_id;
 
<------>bool sample_pwr_events;
<------>u64 pwr_events_sample_type;
<------>u64 mwait_id;
<------>u64 pwre_id;
<------>u64 exstop_id;
<------>u64 pwrx_id;
<------>u64 cbr_id;
 
<------>bool sample_pebs;
<------>struct evsel *pebs_evsel;
 
<------>u64 tsc_bit;
<------>u64 mtc_bit;
<------>u64 mtc_freq_bits;
<------>u32 tsc_ctc_ratio_n;
<------>u32 tsc_ctc_ratio_d;
<------>u64 cyc_bit;
<------>u64 noretcomp_bit;
<------>unsigned max_non_turbo_ratio;
<------>unsigned cbr2khz;
 
<------>unsigned long num_events;
 
<------>char *filter;
<------>struct addr_filters filts;
 
<------>struct range *time_ranges;
<------>unsigned int range_cnt;
 
<------>struct ip_callchain *chain;
<------>struct branch_stack *br_stack;
};
 
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;
<------>struct auxtrace_buffer *old_buffer;
<------>void *decoder;
<------>const struct intel_pt_state *state;
<------>struct ip_callchain *chain;
<------>struct branch_stack *last_branch;
<------>union perf_event *event_buf;
<------>bool on_heap;
<------>bool stop;
<------>bool step_through_buffers;
<------>bool use_buffer_pid_tid;
<------>bool sync_switch;
<------>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;
<------>u64 sel_timestamp;
<------>bool sel_start;
<------>unsigned int sel_idx;
<------>u32 flags;
<------>u16 insn_len;
<------>u64 last_insn_cnt;
<------>u64 ipc_insn_cnt;
<------>u64 ipc_cyc_cnt;
<------>u64 last_in_insn_cnt;
<------>u64 last_in_cyc_cnt;
<------>u64 last_br_insn_cnt;
<------>u64 last_br_cyc_cnt;
<------>unsigned int cbr_seen;
<------>char insn[INTEL_PT_INSN_BUF_SZ];
};
 
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;
<------>enum intel_pt_pkt_ctx ctx = INTEL_PT_NO_CTX;
 
<------>color_fprintf(stdout, color,
<------><------>      ". ... Intel Processor Trace data: size %zu bytes\n",
<------><------>      len);
 
<------>while (len) {
<------><------>ret = intel_pt_get_packet(buf, len, &packet, &ctx);
<------><------>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 void intel_pt_log_event(union perf_event *event)
{
<------>FILE *f = intel_pt_log_fp();
 
<------>if (!intel_pt_enable_logging || !f)
<------><------>return;
 
<------>perf_event__fprintf(event, NULL, f);
}
 
static void intel_pt_dump_sample(struct perf_session *session,
<------><------><------><------> struct perf_sample *sample)
{
<------>struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt,
<------><------><------><------><------>   auxtrace);
 
<------>printf("\n");
<------>intel_pt_dump(pt, sample->aux_sample.data, sample->aux_sample.size);
}
 
static bool intel_pt_log_events(struct intel_pt *pt, u64 tm)
{
<------>struct perf_time_interval *range = pt->synth_opts.ptime_range;
<------>int n = pt->synth_opts.range_num;
 
<------>if (pt->synth_opts.log_plus_flags & AUXTRACE_LOG_FLG_ALL_PERF_EVTS)
<------><------>return true;
 
<------>if (pt->synth_opts.log_minus_flags & AUXTRACE_LOG_FLG_ALL_PERF_EVTS)
<------><------>return false;
 
<------>/* perf_time__ranges_skip_sample does not work if time is zero */
<------>if (!tm)
<------><------>tm = 1;
 
<------>return !n || !perf_time__ranges_skip_sample(range, n, tm);
}
 
static int intel_pt_do_fix_overlap(struct intel_pt *pt, struct auxtrace_buffer *a,
<------><------><------><------>   struct auxtrace_buffer *b)
{
<------>bool consecutive = false;
<------>void *start;
 
<------>start = intel_pt_find_overlap(a->data, a->size, b->data, b->size,
<------><------><------><------>      pt->have_tsc, &consecutive);
<------>if (!start)
<------><------>return -EINVAL;
<------>b->use_size = b->data + b->size - start;
<------>b->use_data = start;
<------>if (b->use_size && consecutive)
<------><------>b->consecutive = true;
<------>return 0;
}
 
static int intel_pt_get_buffer(struct intel_pt_queue *ptq,
<------><------><------>       struct auxtrace_buffer *buffer,
<------><------><------>       struct auxtrace_buffer *old_buffer,
<------><------><------>       struct intel_pt_buffer *b)
{
<------>bool might_overlap;
 
<------>if (!buffer->data) {
<------><------>int fd = perf_data__fd(ptq->pt->session->data);
 
<------><------>buffer->data = auxtrace_buffer__get_data(buffer, fd);
<------><------>if (!buffer->data)
<------><------><------>return -ENOMEM;
<------>}
 
<------>might_overlap = ptq->pt->snapshot_mode || ptq->pt->sampling_mode;
<------>if (might_overlap && !buffer->consecutive && old_buffer &&
<------>    intel_pt_do_fix_overlap(ptq->pt, old_buffer, buffer))
<------><------>return -ENOMEM;
 
<------>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 || (might_overlap && !buffer->consecutive)) {
<------><------>b->consecutive = false;
<------><------>b->trace_nr = buffer->buffer_nr + 1;
<------>} else {
<------><------>b->consecutive = true;
<------>}
 
<------>return 0;
}
 
/* Do not drop buffers with references - refer intel_pt_get_trace() */
static void intel_pt_lookahead_drop_buffer(struct intel_pt_queue *ptq,
<------><------><------><------><------>   struct auxtrace_buffer *buffer)
{
<------>if (!buffer || buffer == ptq->buffer || buffer == ptq->old_buffer)
<------><------>return;
 
<------>auxtrace_buffer__drop_data(buffer);
}
 
/* Must be serialized with respect to intel_pt_get_trace() */
static int intel_pt_lookahead(void *data, intel_pt_lookahead_cb_t cb,
<------><------><------>      void *cb_data)
{
<------>struct intel_pt_queue *ptq = data;
<------>struct auxtrace_buffer *buffer = ptq->buffer;
<------>struct auxtrace_buffer *old_buffer = ptq->old_buffer;
<------>struct auxtrace_queue *queue;
<------>int err = 0;
 
<------>queue = &ptq->pt->queues.queue_array[ptq->queue_nr];
 
<------>while (1) {
<------><------>struct intel_pt_buffer b = { .len = 0 };
 
<------><------>buffer = auxtrace_buffer__next(queue, buffer);
<------><------>if (!buffer)
<------><------><------>break;
 
<------><------>err = intel_pt_get_buffer(ptq, buffer, old_buffer, &b);
<------><------>if (err)
<------><------><------>break;
 
<------><------>if (b.len) {
<------><------><------>intel_pt_lookahead_drop_buffer(ptq, old_buffer);
<------><------><------>old_buffer = buffer;
<------><------>} else {
<------><------><------>intel_pt_lookahead_drop_buffer(ptq, buffer);
<------><------><------>continue;
<------><------>}
 
<------><------>err = cb(&b, cb_data);
<------><------>if (err)
<------><------><------>break;
<------>}
 
<------>if (buffer != old_buffer)
<------><------>intel_pt_lookahead_drop_buffer(ptq, buffer);
<------>intel_pt_lookahead_drop_buffer(ptq, old_buffer);
 
<------>return err;
}
 
/*
 * This function assumes data is processed sequentially only.
 * Must be serialized with respect to intel_pt_lookahead()
 */
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;
<------>struct auxtrace_buffer *old_buffer = ptq->old_buffer;
<------>struct auxtrace_queue *queue;
<------>int err;
 
<------>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;
 
<------>err = intel_pt_get_buffer(ptq, buffer, old_buffer, b);
<------>if (err)
<------><------>return err;
 
<------>if (ptq->step_through_buffers)
<------><------>ptq->stop = true;
 
<------>if (b->len) {
<------><------>if (old_buffer)
<------><------><------>auxtrace_buffer__drop_data(old_buffer);
<------><------>ptq->old_buffer = buffer;
<------>} else {
<------><------>auxtrace_buffer__drop_data(buffer);
<------><------>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;
<------>char				insn[INTEL_PT_INSN_BUF_SZ];
};
 
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;
<------>memcpy(e->insn, intel_pt_insn->buf, INTEL_PT_INSN_BUF_SZ);
 
<------>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 void intel_pt_cache_invalidate(struct dso *dso, struct machine *machine,
<------><------><------><------>      u64 offset)
{
<------>struct auxtrace_cache *c = intel_pt_cache(dso, machine);
 
<------>if (!c)
<------><------>return;
 
<------>auxtrace_cache__remove(dso->auxtrace_cache, offset);
}
 
static inline u8 intel_pt_cpumode(struct intel_pt *pt, uint64_t ip)
{
<------>return ip >= pt->kernel_start ?
<------>       PERF_RECORD_MISC_KERNEL :
<------>       PERF_RECORD_MISC_USER;
}
 
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[INTEL_PT_INSN_BUF_SZ];
<------>ssize_t len;
<------>int x86_64;
<------>u8 cpumode;
<------>u64 offset, start_offset, start_ip;
<------>u64 insn_cnt = 0;
<------>bool one_map = true;
 
<------>intel_pt_insn->length = 0;
 
<------>if (to_ip && *ip == to_ip)
<------><------>goto out_no_cache;
 
<------>cpumode = intel_pt_cpumode(ptq->pt, *ip);
 
<------>thread = ptq->thread;
<------>if (!thread) {
<------><------>if (cpumode != PERF_RECORD_MISC_KERNEL)
<------><------><------>return -EINVAL;
<------><------>thread = ptq->pt->unknown_thread;
<------>}
 
<------>while (1) {
<------><------>if (!thread__find_map(thread, cpumode, *ip, &al) || !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;
<------><------><------><------>memcpy(intel_pt_insn->buf, e->insn,
<------><------><------><------>       INTEL_PT_INSN_BUF_SZ);
<------><------><------><------>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);
 
<------><------>x86_64 = al.map->dso->is_64_bit;
 
<------><------>while (1) {
<------><------><------>len = dso__data_read_offset(al.map->dso, machine,
<------><------><------><------><------><------>    offset, buf,
<------><------><------><------><------><------>    INTEL_PT_INSN_BUF_SZ);
<------><------><------>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) {
<------><------><------><------>intel_pt_insn->length = 0;
<------><------><------><------>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_match_pgd_ip(struct intel_pt *pt, uint64_t ip,
<------><------><------><------>  uint64_t offset, const char *filename)
{
<------>struct addr_filter *filt;
<------>bool have_filter   = false;
<------>bool hit_tracestop = false;
<------>bool hit_filter    = false;
 
<------>list_for_each_entry(filt, &pt->filts.head, list) {
<------><------>if (filt->start)
<------><------><------>have_filter = true;
 
<------><------>if ((filename && !filt->filename) ||
<------><------>    (!filename && filt->filename) ||
<------><------>    (filename && strcmp(filename, filt->filename)))
<------><------><------>continue;
 
<------><------>if (!(offset >= filt->addr && offset < filt->addr + filt->size))
<------><------><------>continue;
 
<------><------>intel_pt_log("TIP.PGD ip %#"PRIx64" offset %#"PRIx64" in %s hit filter: %s offset %#"PRIx64" size %#"PRIx64"\n",
<------><------><------>     ip, offset, filename ? filename : "[kernel]",
<------><------><------>     filt->start ? "filter" : "stop",
<------><------><------>     filt->addr, filt->size);
 
<------><------>if (filt->start)
<------><------><------>hit_filter = true;
<------><------>else
<------><------><------>hit_tracestop = true;
<------>}
 
<------>if (!hit_tracestop && !hit_filter)
<------><------>intel_pt_log("TIP.PGD ip %#"PRIx64" offset %#"PRIx64" in %s is not in a filter region\n",
<------><------><------>     ip, offset, filename ? filename : "[kernel]");
 
<------>return hit_tracestop || (have_filter && !hit_filter);
}
 
static int __intel_pt_pgd_ip(uint64_t ip, void *data)
{
<------>struct intel_pt_queue *ptq = data;
<------>struct thread *thread;
<------>struct addr_location al;
<------>u8 cpumode;
<------>u64 offset;
 
<------>if (ip >= ptq->pt->kernel_start)
<------><------>return intel_pt_match_pgd_ip(ptq->pt, ip, ip, NULL);
 
<------>cpumode = PERF_RECORD_MISC_USER;
 
<------>thread = ptq->thread;
<------>if (!thread)
<------><------>return -EINVAL;
 
<------>if (!thread__find_map(thread, cpumode, ip, &al) || !al.map->dso)
<------><------>return -EINVAL;
 
<------>offset = al.map->map_ip(al.map, ip);
 
<------>return intel_pt_match_pgd_ip(ptq->pt, ip, offset,
<------><------><------><------>     al.map->dso->long_name);
}
 
static bool intel_pt_pgd_ip(uint64_t ip, void *data)
{
<------>return __intel_pt_pgd_ip(ip, data) > 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 evsel *evsel;
 
<------>evlist__for_each_entry(pt->session->evlist, evsel) {
<------><------>if (intel_pt_get_config(pt, &evsel->core.attr, NULL) &&
<------><------>    !evsel->core.attr.exclude_kernel)
<------><------><------>return false;
<------>}
<------>return true;
}
 
static bool intel_pt_return_compression(struct intel_pt *pt)
{
<------>struct evsel *evsel;
<------>u64 config;
 
<------>if (!pt->noretcomp_bit)
<------><------>return true;
 
<------>evlist__for_each_entry(pt->session->evlist, evsel) {
<------><------>if (intel_pt_get_config(pt, &evsel->core.attr, &config) &&
<------><------>    (config & pt->noretcomp_bit))
<------><------><------>return false;
<------>}
<------>return true;
}
 
static bool intel_pt_branch_enable(struct intel_pt *pt)
{
<------>struct evsel *evsel;
<------>u64 config;
 
<------>evlist__for_each_entry(pt->session->evlist, evsel) {
<------><------>if (intel_pt_get_config(pt, &evsel->core.attr, &config) &&
<------><------>    (config & 1) && !(config & 0x2000))
<------><------><------>return false;
<------>}
<------>return true;
}
 
static unsigned int intel_pt_mtc_period(struct intel_pt *pt)
{
<------>struct evsel *evsel;
<------>unsigned int shift;
<------>u64 config;
 
<------>if (!pt->mtc_freq_bits)
<------><------>return 0;
 
<------>for (shift = 0, config = pt->mtc_freq_bits; !(config & 1); shift++)
<------><------>config >>= 1;
 
<------>evlist__for_each_entry(pt->session->evlist, evsel) {
<------><------>if (intel_pt_get_config(pt, &evsel->core.attr, &config))
<------><------><------>return (config & pt->mtc_freq_bits) >> shift;
<------>}
<------>return 0;
}
 
static bool intel_pt_timeless_decoding(struct intel_pt *pt)
{
<------>struct evsel *evsel;
<------>bool timeless_decoding = true;
<------>u64 config;
 
<------>if (!pt->tsc_bit || !pt->cap_user_time_zero)
<------><------>return true;
 
<------>evlist__for_each_entry(pt->session->evlist, evsel) {
<------><------>if (!(evsel->core.attr.sample_type & PERF_SAMPLE_TIME))
<------><------><------>return true;
<------><------>if (intel_pt_get_config(pt, &evsel->core.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 evsel *evsel;
 
<------>evlist__for_each_entry(pt->session->evlist, evsel) {
<------><------>if (intel_pt_get_config(pt, &evsel->core.attr, NULL) &&
<------><------>    !evsel->core.attr.exclude_kernel)
<------><------><------>return true;
<------>}
<------>return false;
}
 
static bool intel_pt_have_tsc(struct intel_pt *pt)
{
<------>struct evsel *evsel;
<------>bool have_tsc = false;
<------>u64 config;
 
<------>if (!pt->tsc_bit)
<------><------>return false;
 
<------>evlist__for_each_entry(pt->session->evlist, evsel) {
<------><------>if (intel_pt_get_config(pt, &evsel->core.attr, &config)) {
<------><------><------>if (config & pt->tsc_bit)
<------><------><------><------>have_tsc = true;
<------><------><------>else
<------><------><------><------>return false;
<------><------>}
<------>}
<------>return have_tsc;
}
 
static bool intel_pt_sampling_mode(struct intel_pt *pt)
{
<------>struct evsel *evsel;
 
<------>evlist__for_each_entry(pt->session->evlist, evsel) {
<------><------>if ((evsel->core.attr.sample_type & PERF_SAMPLE_AUX) &&
<------><------>    evsel->core.attr.aux_sample_size)
<------><------><------>return true;
<------>}
<------>return false;
}
 
static u64 intel_pt_ctl(struct intel_pt *pt)
{
<------>struct evsel *evsel;
<------>u64 config;
 
<------>evlist__for_each_entry(pt->session->evlist, evsel) {
<------><------>if (intel_pt_get_config(pt, &evsel->core.attr, &config))
<------><------><------>return config;
<------>}
<------>return 0;
}
 
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 ip_callchain *intel_pt_alloc_chain(struct intel_pt *pt)
{
<------>size_t sz = sizeof(struct ip_callchain);
 
<------>/* Add 1 to callchain_sz for callchain context */
<------>sz += (pt->synth_opts.callchain_sz + 1) * sizeof(u64);
<------>return zalloc(sz);
}
 
static int intel_pt_callchain_init(struct intel_pt *pt)
{
<------>struct evsel *evsel;
 
<------>evlist__for_each_entry(pt->session->evlist, evsel) {
<------><------>if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CALLCHAIN))
<------><------><------>evsel->synth_sample_type |= PERF_SAMPLE_CALLCHAIN;
<------>}
 
<------>pt->chain = intel_pt_alloc_chain(pt);
<------>if (!pt->chain)
<------><------>return -ENOMEM;
 
<------>return 0;
}
 
static void intel_pt_add_callchain(struct intel_pt *pt,
<------><------><------><------>   struct perf_sample *sample)
{
<------>struct thread *thread = machine__findnew_thread(pt->machine,
<------><------><------><------><------><------><------>sample->pid,
<------><------><------><------><------><------><------>sample->tid);
 
<------>thread_stack__sample_late(thread, sample->cpu, pt->chain,
<------><------><------><------>  pt->synth_opts.callchain_sz + 1, sample->ip,
<------><------><------><------>  pt->kernel_start);
 
<------>sample->callchain = pt->chain;
}
 
static struct branch_stack *intel_pt_alloc_br_stack(unsigned int entry_cnt)
{
<------>size_t sz = sizeof(struct branch_stack);
 
<------>sz += entry_cnt * sizeof(struct branch_entry);
<------>return zalloc(sz);
}
 
static int intel_pt_br_stack_init(struct intel_pt *pt)
{
<------>struct evsel *evsel;
 
<------>evlist__for_each_entry(pt->session->evlist, evsel) {
<------><------>if (!(evsel->core.attr.sample_type & PERF_SAMPLE_BRANCH_STACK))
<------><------><------>evsel->synth_sample_type |= PERF_SAMPLE_BRANCH_STACK;
<------>}
 
<------>pt->br_stack = intel_pt_alloc_br_stack(pt->br_stack_sz);
<------>if (!pt->br_stack)
<------><------>return -ENOMEM;
 
<------>return 0;
}
 
static void intel_pt_add_br_stack(struct intel_pt *pt,
<------><------><------><------>  struct perf_sample *sample)
{
<------>struct thread *thread = machine__findnew_thread(pt->machine,
<------><------><------><------><------><------><------>sample->pid,
<------><------><------><------><------><------><------>sample->tid);
 
<------>thread_stack__br_sample_late(thread, sample->cpu, pt->br_stack,
<------><------><------><------>     pt->br_stack_sz, sample->ip,
<------><------><------><------>     pt->kernel_start);
 
<------>sample->branch_stack = pt->br_stack;
}
 
/* INTEL_PT_LBR_0, INTEL_PT_LBR_1 and INTEL_PT_LBR_2 */
#define LBRS_MAX (INTEL_PT_BLK_ITEM_ID_CNT * 3U)
 
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 perf_env *env = pt->machine->env;
<------>struct intel_pt_queue *ptq;
 
<------>ptq = zalloc(sizeof(struct intel_pt_queue));
<------>if (!ptq)
<------><------>return NULL;
 
<------>if (pt->synth_opts.callchain) {
<------><------>ptq->chain = intel_pt_alloc_chain(pt);
<------><------>if (!ptq->chain)
<------><------><------>goto out_free;
<------>}
 
<------>if (pt->synth_opts.last_branch || pt->synth_opts.other_events) {
<------><------>unsigned int entry_cnt = max(LBRS_MAX, pt->br_stack_sz);
 
<------><------>ptq->last_branch = intel_pt_alloc_br_stack(entry_cnt);
<------><------>if (!ptq->last_branch)
<------><------><------>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.lookahead = intel_pt_lookahead;
<------>params.data = ptq;
<------>params.return_compression = intel_pt_return_compression(pt);
<------>params.branch_enable = intel_pt_branch_enable(pt);
<------>params.ctl = intel_pt_ctl(pt);
<------>params.max_non_turbo_ratio = pt->max_non_turbo_ratio;
<------>params.mtc_period = intel_pt_mtc_period(pt);
<------>params.tsc_ctc_ratio_n = pt->tsc_ctc_ratio_n;
<------>params.tsc_ctc_ratio_d = pt->tsc_ctc_ratio_d;
<------>params.quick = pt->synth_opts.quick;
 
<------>if (pt->filts.cnt > 0)
<------><------>params.pgd_ip = intel_pt_pgd_ip;
 
<------>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 = 1;
<------><------>}
<------>}
 
<------>if (env->cpuid && !strncmp(env->cpuid, "GenuineIntel,6,92,", 18))
<------><------>params.flags |= INTEL_PT_FUP_WITH_NLIP;
 
<------>ptq->decoder = intel_pt_decoder_new(&params);
<------>if (!ptq->decoder)
<------><------>goto out_free;
 
<------>return ptq;
 
out_free:
<------>zfree(&ptq->event_buf);
<------>zfree(&ptq->last_branch);
<------>zfree(&ptq->chain);
<------>free(ptq);
<------>return NULL;
}
 
static void intel_pt_free_queue(void *priv)
{
<------>struct intel_pt_queue *ptq = priv;
 
<------>if (!ptq)
<------><------>return;
<------>thread__zput(ptq->thread);
<------>intel_pt_decoder_free(ptq->decoder);
<------>zfree(&ptq->event_buf);
<------>zfree(&ptq->last_branch);
<------>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);
<------><------>if (ptq->tid == -1)
<------><------><------>ptq->pid = -1;
<------><------>thread__zput(ptq->thread);
<------>}
 
<------>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)
{
<------>ptq->insn_len = 0;
<------>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;
<------><------>memcpy(ptq->insn, ptq->state->insn, INTEL_PT_INSN_BUF_SZ);
<------>}
 
<------>if (ptq->state->type & INTEL_PT_TRACE_BEGIN)
<------><------>ptq->flags |= PERF_IP_FLAG_TRACE_BEGIN;
<------>if (ptq->state->type & INTEL_PT_TRACE_END)
<------><------>ptq->flags |= PERF_IP_FLAG_TRACE_END;
}
 
static void intel_pt_setup_time_range(struct intel_pt *pt,
<------><------><------><------>      struct intel_pt_queue *ptq)
{
<------>if (!pt->range_cnt)
<------><------>return;
 
<------>ptq->sel_timestamp = pt->time_ranges[0].start;
<------>ptq->sel_idx = 0;
 
<------>if (ptq->sel_timestamp) {
<------><------>ptq->sel_start = true;
<------>} else {
<------><------>ptq->sel_timestamp = pt->time_ranges[0].end;
<------><------>ptq->sel_start = false;
<------>}
}
 
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;
 
<------><------>ptq->cbr_seen = UINT_MAX;
 
<------><------>if (pt->sampling_mode && !pt->snapshot_mode &&
<------><------>    pt->timeless_decoding)
<------><------><------>ptq->step_through_buffers = true;
 
<------><------>ptq->sync_switch = pt->sync_switch;
 
<------><------>intel_pt_setup_time_range(pt, ptq);
<------>}
 
<------>if (!ptq->on_heap &&
<------>    (!ptq->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);
 
<------><------>if (ptq->sel_start && ptq->sel_timestamp) {
<------><------><------>ret = intel_pt_fast_forward(ptq->decoder,
<------><------><------><------><------><------>    ptq->sel_timestamp);
<------><------><------>if (ret)
<------><------><------><------>return ret;
<------><------>}
 
<------><------>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;
<------><------>if (ptq->sel_start && ptq->sel_timestamp &&
<------><------>    ptq->timestamp < ptq->sel_timestamp)
<------><------><------>ptq->have_sample = false;
<------><------>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 inline bool intel_pt_skip_event(struct intel_pt *pt)
{
<------>return pt->synth_opts.initial_skip &&
<------>       pt->num_events++ < pt->synth_opts.initial_skip;
}
 
/*
 * Cannot count CBR as skipped because it won't go away until cbr == cbr_seen.
 * Also ensure CBR is first non-skipped event by allowing for 4 more samples
 * from this decoder state.
 */
static inline bool intel_pt_skip_cbr_event(struct intel_pt *pt)
{
<------>return pt->synth_opts.initial_skip &&
<------>       pt->num_events + 4 < pt->synth_opts.initial_skip;
}
 
static void intel_pt_prep_a_sample(struct intel_pt_queue *ptq,
<------><------><------><------>   union perf_event *event,
<------><------><------><------>   struct perf_sample *sample)
{
<------>event->sample.header.type = PERF_RECORD_SAMPLE;
<------>event->sample.header.size = sizeof(struct perf_event_header);
 
<------>sample->pid = ptq->pid;
<------>sample->tid = ptq->tid;
<------>sample->cpu = ptq->cpu;
<------>sample->insn_len = ptq->insn_len;
<------>memcpy(sample->insn, ptq->insn, INTEL_PT_INSN_BUF_SZ);
}
 
static void intel_pt_prep_b_sample(struct intel_pt *pt,
<------><------><------><------>   struct intel_pt_queue *ptq,
<------><------><------><------>   union perf_event *event,
<------><------><------><------>   struct perf_sample *sample)
{
<------>intel_pt_prep_a_sample(ptq, event, sample);
 
<------>if (!pt->timeless_decoding)
<------><------>sample->time = tsc_to_perf_time(ptq->timestamp, &pt->tc);
 
<------>sample->ip = ptq->state->from_ip;
<------>sample->cpumode = intel_pt_cpumode(pt, sample->ip);
<------>sample->addr = ptq->state->to_ip;
<------>sample->period = 1;
<------>sample->flags = ptq->flags;
 
<------>event->sample.header.misc = sample->cpumode;
}
 
static int intel_pt_inject_event(union perf_event *event,
<------><------><------><------> struct perf_sample *sample, u64 type)
{
<------>event->header.size = perf_event__sample_event_size(sample, type, 0);
<------>return perf_event__synthesize_sample(event, type, 0, sample);
}
 
static inline int intel_pt_opt_inject(struct intel_pt *pt,
<------><------><------><------>      union perf_event *event,
<------><------><------><------>      struct perf_sample *sample, u64 type)
{
<------>if (!pt->synth_opts.inject)
<------><------>return 0;
 
<------>return intel_pt_inject_event(event, sample, type);
}
 
static int intel_pt_deliver_synth_event(struct intel_pt *pt,
<------><------><------><------><------>union perf_event *event,
<------><------><------><------><------>struct perf_sample *sample, u64 type)
{
<------>int ret;
 
<------>ret = intel_pt_opt_inject(pt, event, sample, type);
<------>if (ret)
<------><------>return ret;
 
<------>ret = perf_session__deliver_synth_event(pt->session, event, sample);
<------>if (ret)
<------><------>pr_err("Intel PT: failed to deliver event, error %d\n", ret);
 
<------>return ret;
}
 
static int intel_pt_synth_branch_sample(struct intel_pt_queue *ptq)
{
<------>struct intel_pt *pt = ptq->pt;
<------>union perf_event *event = ptq->event_buf;
<------>struct perf_sample sample = { .ip = 0, };
<------>struct dummy_branch_stack {
<------><------>u64			nr;
<------><------>u64			hw_idx;
<------><------>struct branch_entry	entries;
<------>} dummy_bs;
 
<------>if (pt->branches_filter && !(pt->branches_filter & ptq->flags))
<------><------>return 0;
 
<------>if (intel_pt_skip_event(pt))
<------><------>return 0;
 
<------>intel_pt_prep_b_sample(pt, ptq, event, &sample);
 
<------>sample.id = ptq->pt->branches_id;
<------>sample.stream_id = ptq->pt->branches_id;
 
<------>/*
<------> * perf report cannot handle events without a branch stack when using
<------> * SORT_MODE__BRANCH so make a dummy one.
<------> */
<------>if (pt->synth_opts.last_branch && sort__mode == SORT_MODE__BRANCH) {
<------><------>dummy_bs = (struct dummy_branch_stack){
<------><------><------>.nr = 1,
<------><------><------>.hw_idx = -1ULL,
<------><------><------>.entries = {
<------><------><------><------>.from = sample.ip,
<------><------><------><------>.to = sample.addr,
<------><------><------>},
<------><------>};
<------><------>sample.branch_stack = (struct branch_stack *)&dummy_bs;
<------>}
 
<------>if (ptq->state->flags & INTEL_PT_SAMPLE_IPC)
<------><------>sample.cyc_cnt = ptq->ipc_cyc_cnt - ptq->last_br_cyc_cnt;
<------>if (sample.cyc_cnt) {
<------><------>sample.insn_cnt = ptq->ipc_insn_cnt - ptq->last_br_insn_cnt;
<------><------>ptq->last_br_insn_cnt = ptq->ipc_insn_cnt;
<------><------>ptq->last_br_cyc_cnt = ptq->ipc_cyc_cnt;
<------>}
 
<------>return intel_pt_deliver_synth_event(pt, event, &sample,
<------><------><------><------><------>    pt->branches_sample_type);
}
 
static void intel_pt_prep_sample(struct intel_pt *pt,
<------><------><------><------> struct intel_pt_queue *ptq,
<------><------><------><------> union perf_event *event,
<------><------><------><------> struct perf_sample *sample)
{
<------>intel_pt_prep_b_sample(pt, ptq, event, sample);
 
<------>if (pt->synth_opts.callchain) {
<------><------>thread_stack__sample(ptq->thread, ptq->cpu, ptq->chain,
<------><------><------><------>     pt->synth_opts.callchain_sz + 1,
<------><------><------><------>     sample->ip, pt->kernel_start);
<------><------>sample->callchain = ptq->chain;
<------>}
 
<------>if (pt->synth_opts.last_branch) {
<------><------>thread_stack__br_sample(ptq->thread, ptq->cpu, ptq->last_branch,
<------><------><------><------><------>pt->br_stack_sz);
<------><------>sample->branch_stack = ptq->last_branch;
<------>}
}
 
static int intel_pt_synth_instruction_sample(struct intel_pt_queue *ptq)
{
<------>struct intel_pt *pt = ptq->pt;
<------>union perf_event *event = ptq->event_buf;
<------>struct perf_sample sample = { .ip = 0, };
 
<------>if (intel_pt_skip_event(pt))
<------><------>return 0;
 
<------>intel_pt_prep_sample(pt, ptq, event, &sample);
 
<------>sample.id = ptq->pt->instructions_id;
<------>sample.stream_id = ptq->pt->instructions_id;
<------>if (pt->synth_opts.quick)
<------><------>sample.period = 1;
<------>else
<------><------>sample.period = ptq->state->tot_insn_cnt - ptq->last_insn_cnt;
 
<------>if (ptq->state->flags & INTEL_PT_SAMPLE_IPC)
<------><------>sample.cyc_cnt = ptq->ipc_cyc_cnt - ptq->last_in_cyc_cnt;
<------>if (sample.cyc_cnt) {
<------><------>sample.insn_cnt = ptq->ipc_insn_cnt - ptq->last_in_insn_cnt;
<------><------>ptq->last_in_insn_cnt = ptq->ipc_insn_cnt;
<------><------>ptq->last_in_cyc_cnt = ptq->ipc_cyc_cnt;
<------>}
 
<------>ptq->last_insn_cnt = ptq->state->tot_insn_cnt;
 
<------>return intel_pt_deliver_synth_event(pt, event, &sample,
<------><------><------><------><------>    pt->instructions_sample_type);
}
 
static int intel_pt_synth_transaction_sample(struct intel_pt_queue *ptq)
{
<------>struct intel_pt *pt = ptq->pt;
<------>union perf_event *event = ptq->event_buf;
<------>struct perf_sample sample = { .ip = 0, };
 
<------>if (intel_pt_skip_event(pt))
<------><------>return 0;
 
<------>intel_pt_prep_sample(pt, ptq, event, &sample);
 
<------>sample.id = ptq->pt->transactions_id;
<------>sample.stream_id = ptq->pt->transactions_id;
 
<------>return intel_pt_deliver_synth_event(pt, event, &sample,
<------><------><------><------><------>    pt->transactions_sample_type);
}
 
static void intel_pt_prep_p_sample(struct intel_pt *pt,
<------><------><------><------>   struct intel_pt_queue *ptq,
<------><------><------><------>   union perf_event *event,
<------><------><------><------>   struct perf_sample *sample)
{
<------>intel_pt_prep_sample(pt, ptq, event, sample);
 
<------>/*
<------> * Zero IP is used to mean "trace start" but that is not the case for
<------> * power or PTWRITE events with no IP, so clear the flags.
<------> */
<------>if (!sample->ip)
<------><------>sample->flags = 0;
}
 
static int intel_pt_synth_ptwrite_sample(struct intel_pt_queue *ptq)
{
<------>struct intel_pt *pt = ptq->pt;
<------>union perf_event *event = ptq->event_buf;
<------>struct perf_sample sample = { .ip = 0, };
<------>struct perf_synth_intel_ptwrite raw;
 
<------>if (intel_pt_skip_event(pt))
<------><------>return 0;
 
<------>intel_pt_prep_p_sample(pt, ptq, event, &sample);
 
<------>sample.id = ptq->pt->ptwrites_id;
<------>sample.stream_id = ptq->pt->ptwrites_id;
 
<------>raw.flags = 0;
<------>raw.ip = !!(ptq->state->flags & INTEL_PT_FUP_IP);
<------>raw.payload = cpu_to_le64(ptq->state->ptw_payload);
 
<------>sample.raw_size = perf_synth__raw_size(raw);
<------>sample.raw_data = perf_synth__raw_data(&raw);
 
<------>return intel_pt_deliver_synth_event(pt, event, &sample,
<------><------><------><------><------>    pt->ptwrites_sample_type);
}
 
static int intel_pt_synth_cbr_sample(struct intel_pt_queue *ptq)
{
<------>struct intel_pt *pt = ptq->pt;
<------>union perf_event *event = ptq->event_buf;
<------>struct perf_sample sample = { .ip = 0, };
<------>struct perf_synth_intel_cbr raw;
<------>u32 flags;
 
<------>if (intel_pt_skip_cbr_event(pt))
<------><------>return 0;
 
<------>ptq->cbr_seen = ptq->state->cbr;
 
<------>intel_pt_prep_p_sample(pt, ptq, event, &sample);
 
<------>sample.id = ptq->pt->cbr_id;
<------>sample.stream_id = ptq->pt->cbr_id;
 
<------>flags = (u16)ptq->state->cbr_payload | (pt->max_non_turbo_ratio << 16);
<------>raw.flags = cpu_to_le32(flags);
<------>raw.freq = cpu_to_le32(raw.cbr * pt->cbr2khz);
<------>raw.reserved3 = 0;
 
<------>sample.raw_size = perf_synth__raw_size(raw);
<------>sample.raw_data = perf_synth__raw_data(&raw);
 
<------>return intel_pt_deliver_synth_event(pt, event, &sample,
<------><------><------><------><------>    pt->pwr_events_sample_type);
}
 
static int intel_pt_synth_mwait_sample(struct intel_pt_queue *ptq)
{
<------>struct intel_pt *pt = ptq->pt;
<------>union perf_event *event = ptq->event_buf;
<------>struct perf_sample sample = { .ip = 0, };
<------>struct perf_synth_intel_mwait raw;
 
<------>if (intel_pt_skip_event(pt))
<------><------>return 0;
 
<------>intel_pt_prep_p_sample(pt, ptq, event, &sample);
 
<------>sample.id = ptq->pt->mwait_id;
<------>sample.stream_id = ptq->pt->mwait_id;
 
<------>raw.reserved = 0;
<------>raw.payload = cpu_to_le64(ptq->state->mwait_payload);
 
<------>sample.raw_size = perf_synth__raw_size(raw);
<------>sample.raw_data = perf_synth__raw_data(&raw);
 
<------>return intel_pt_deliver_synth_event(pt, event, &sample,
<------><------><------><------><------>    pt->pwr_events_sample_type);
}
 
static int intel_pt_synth_pwre_sample(struct intel_pt_queue *ptq)
{
<------>struct intel_pt *pt = ptq->pt;
<------>union perf_event *event = ptq->event_buf;
<------>struct perf_sample sample = { .ip = 0, };
<------>struct perf_synth_intel_pwre raw;
 
<------>if (intel_pt_skip_event(pt))
<------><------>return 0;
 
<------>intel_pt_prep_p_sample(pt, ptq, event, &sample);
 
<------>sample.id = ptq->pt->pwre_id;
<------>sample.stream_id = ptq->pt->pwre_id;
 
<------>raw.reserved = 0;
<------>raw.payload = cpu_to_le64(ptq->state->pwre_payload);
 
<------>sample.raw_size = perf_synth__raw_size(raw);
<------>sample.raw_data = perf_synth__raw_data(&raw);
 
<------>return intel_pt_deliver_synth_event(pt, event, &sample,
<------><------><------><------><------>    pt->pwr_events_sample_type);
}
 
static int intel_pt_synth_exstop_sample(struct intel_pt_queue *ptq)
{
<------>struct intel_pt *pt = ptq->pt;
<------>union perf_event *event = ptq->event_buf;
<------>struct perf_sample sample = { .ip = 0, };
<------>struct perf_synth_intel_exstop raw;
 
<------>if (intel_pt_skip_event(pt))
<------><------>return 0;
 
<------>intel_pt_prep_p_sample(pt, ptq, event, &sample);
 
<------>sample.id = ptq->pt->exstop_id;
<------>sample.stream_id = ptq->pt->exstop_id;
 
<------>raw.flags = 0;
<------>raw.ip = !!(ptq->state->flags & INTEL_PT_FUP_IP);
 
<------>sample.raw_size = perf_synth__raw_size(raw);
<------>sample.raw_data = perf_synth__raw_data(&raw);
 
<------>return intel_pt_deliver_synth_event(pt, event, &sample,
<------><------><------><------><------>    pt->pwr_events_sample_type);
}
 
static int intel_pt_synth_pwrx_sample(struct intel_pt_queue *ptq)
{
<------>struct intel_pt *pt = ptq->pt;
<------>union perf_event *event = ptq->event_buf;
<------>struct perf_sample sample = { .ip = 0, };
<------>struct perf_synth_intel_pwrx raw;
 
<------>if (intel_pt_skip_event(pt))
<------><------>return 0;
 
<------>intel_pt_prep_p_sample(pt, ptq, event, &sample);
 
<------>sample.id = ptq->pt->pwrx_id;
<------>sample.stream_id = ptq->pt->pwrx_id;
 
<------>raw.reserved = 0;
<------>raw.payload = cpu_to_le64(ptq->state->pwrx_payload);
 
<------>sample.raw_size = perf_synth__raw_size(raw);
<------>sample.raw_data = perf_synth__raw_data(&raw);
 
<------>return intel_pt_deliver_synth_event(pt, event, &sample,
<------><------><------><------><------>    pt->pwr_events_sample_type);
}
 
/*
 * PEBS gp_regs array indexes plus 1 so that 0 means not present. Refer
 * intel_pt_add_gp_regs().
 */
static const int pebs_gp_regs[] = {
<------>[PERF_REG_X86_FLAGS]	= 1,
<------>[PERF_REG_X86_IP]	= 2,
<------>[PERF_REG_X86_AX]	= 3,
<------>[PERF_REG_X86_CX]	= 4,
<------>[PERF_REG_X86_DX]	= 5,
<------>[PERF_REG_X86_BX]	= 6,
<------>[PERF_REG_X86_SP]	= 7,
<------>[PERF_REG_X86_BP]	= 8,
<------>[PERF_REG_X86_SI]	= 9,
<------>[PERF_REG_X86_DI]	= 10,
<------>[PERF_REG_X86_R8]	= 11,
<------>[PERF_REG_X86_R9]	= 12,
<------>[PERF_REG_X86_R10]	= 13,
<------>[PERF_REG_X86_R11]	= 14,
<------>[PERF_REG_X86_R12]	= 15,
<------>[PERF_REG_X86_R13]	= 16,
<------>[PERF_REG_X86_R14]	= 17,
<------>[PERF_REG_X86_R15]	= 18,
};
 
static u64 *intel_pt_add_gp_regs(struct regs_dump *intr_regs, u64 *pos,
<------><------><------><------> const struct intel_pt_blk_items *items,
<------><------><------><------> u64 regs_mask)
{
<------>const u64 *gp_regs = items->val[INTEL_PT_GP_REGS_POS];
<------>u32 mask = items->mask[INTEL_PT_GP_REGS_POS];
<------>u32 bit;
<------>int i;
 
<------>for (i = 0, bit = 1; i < PERF_REG_X86_64_MAX; i++, bit <<= 1) {
<------><------>/* Get the PEBS gp_regs array index */
<------><------>int n = pebs_gp_regs[i] - 1;
 
<------><------>if (n < 0)
<------><------><------>continue;
<------><------>/*
<------><------> * Add only registers that were requested (i.e. 'regs_mask') and
<------><------> * that were provided (i.e. 'mask'), and update the resulting
<------><------> * mask (i.e. 'intr_regs->mask') accordingly.
<------><------> */
<------><------>if (mask & 1 << n && regs_mask & bit) {
<------><------><------>intr_regs->mask |= bit;
<------><------><------>*pos++ = gp_regs[n];
<------><------>}
<------>}
 
<------>return pos;
}
 
#ifndef PERF_REG_X86_XMM0
#define PERF_REG_X86_XMM0 32
#endif
 
static void intel_pt_add_xmm(struct regs_dump *intr_regs, u64 *pos,
<------><------><------>     const struct intel_pt_blk_items *items,
<------><------><------>     u64 regs_mask)
{
<------>u32 mask = items->has_xmm & (regs_mask >> PERF_REG_X86_XMM0);
<------>const u64 *xmm = items->xmm;
 
<------>/*
<------> * If there are any XMM registers, then there should be all of them.
<------> * Nevertheless, follow the logic to add only registers that were
<------> * requested (i.e. 'regs_mask') and that were provided (i.e. 'mask'),
<------> * and update the resulting mask (i.e. 'intr_regs->mask') accordingly.
<------> */
<------>intr_regs->mask |= (u64)mask << PERF_REG_X86_XMM0;
 
<------>for (; mask; mask >>= 1, xmm++) {
<------><------>if (mask & 1)
<------><------><------>*pos++ = *xmm;
<------>}
}
 
#define LBR_INFO_MISPRED	(1ULL << 63)
#define LBR_INFO_IN_TX		(1ULL << 62)
#define LBR_INFO_ABORT		(1ULL << 61)
#define LBR_INFO_CYCLES		0xffff
 
/* Refer kernel's intel_pmu_store_pebs_lbrs() */
static u64 intel_pt_lbr_flags(u64 info)
{
<------>union {
<------><------>struct branch_flags flags;
<------><------>u64 result;
<------>} u;
 
<------>u.result	  = 0;
<------>u.flags.mispred	  = !!(info & LBR_INFO_MISPRED);
<------>u.flags.predicted = !(info & LBR_INFO_MISPRED);
<------>u.flags.in_tx	  = !!(info & LBR_INFO_IN_TX);
<------>u.flags.abort	  = !!(info & LBR_INFO_ABORT);
<------>u.flags.cycles	  = info & LBR_INFO_CYCLES;
 
<------>return u.result;
}
 
static void intel_pt_add_lbrs(struct branch_stack *br_stack,
<------><------><------>      const struct intel_pt_blk_items *items)
{
<------>u64 *to;
<------>int i;
 
<------>br_stack->nr = 0;
 
<------>to = &br_stack->entries[0].from;
 
<------>for (i = INTEL_PT_LBR_0_POS; i <= INTEL_PT_LBR_2_POS; i++) {
<------><------>u32 mask = items->mask[i];
<------><------>const u64 *from = items->val[i];
 
<------><------>for (; mask; mask >>= 3, from += 3) {
<------><------><------>if ((mask & 7) == 7) {
<------><------><------><------>*to++ = from[0];
<------><------><------><------>*to++ = from[1];
<------><------><------><------>*to++ = intel_pt_lbr_flags(from[2]);
<------><------><------><------>br_stack->nr += 1;
<------><------><------>}
<------><------>}
<------>}
}
 
static int intel_pt_synth_pebs_sample(struct intel_pt_queue *ptq)
{
<------>const struct intel_pt_blk_items *items = &ptq->state->items;
<------>struct perf_sample sample = { .ip = 0, };
<------>union perf_event *event = ptq->event_buf;
<------>struct intel_pt *pt = ptq->pt;
<------>struct evsel *evsel = pt->pebs_evsel;
<------>u64 sample_type = evsel->core.attr.sample_type;
<------>u64 id = evsel->core.id[0];
<------>u8 cpumode;
<------>u64 regs[8 * sizeof(sample.intr_regs.mask)];
 
<------>if (intel_pt_skip_event(pt))
<------><------>return 0;
 
<------>intel_pt_prep_a_sample(ptq, event, &sample);
 
<------>sample.id = id;
<------>sample.stream_id = id;
 
<------>if (!evsel->core.attr.freq)
<------><------>sample.period = evsel->core.attr.sample_period;
 
<------>/* No support for non-zero CS base */
<------>if (items->has_ip)
<------><------>sample.ip = items->ip;
<------>else if (items->has_rip)
<------><------>sample.ip = items->rip;
<------>else
<------><------>sample.ip = ptq->state->from_ip;
 
<------>/* No support for guest mode at this time */
<------>cpumode = sample.ip < ptq->pt->kernel_start ?
<------><------>  PERF_RECORD_MISC_USER :
<------><------>  PERF_RECORD_MISC_KERNEL;
 
<------>event->sample.header.misc = cpumode | PERF_RECORD_MISC_EXACT_IP;
 
<------>sample.cpumode = cpumode;
 
<------>if (sample_type & PERF_SAMPLE_TIME) {
<------><------>u64 timestamp = 0;
 
<------><------>if (items->has_timestamp)
<------><------><------>timestamp = items->timestamp;
<------><------>else if (!pt->timeless_decoding)
<------><------><------>timestamp = ptq->timestamp;
<------><------>if (timestamp)
<------><------><------>sample.time = tsc_to_perf_time(timestamp, &pt->tc);
<------>}
 
<------>if (sample_type & PERF_SAMPLE_CALLCHAIN &&
<------>    pt->synth_opts.callchain) {
<------><------>thread_stack__sample(ptq->thread, ptq->cpu, ptq->chain,
<------><------><------><------>     pt->synth_opts.callchain_sz, sample.ip,
<------><------><------><------>     pt->kernel_start);
<------><------>sample.callchain = ptq->chain;
<------>}
 
<------>if (sample_type & PERF_SAMPLE_REGS_INTR &&
<------>    (items->mask[INTEL_PT_GP_REGS_POS] ||
<------>     items->mask[INTEL_PT_XMM_POS])) {
<------><------>u64 regs_mask = evsel->core.attr.sample_regs_intr;
<------><------>u64 *pos;
 
<------><------>sample.intr_regs.abi = items->is_32_bit ?
<------><------><------><------>       PERF_SAMPLE_REGS_ABI_32 :
<------><------><------><------>       PERF_SAMPLE_REGS_ABI_64;
<------><------>sample.intr_regs.regs = regs;
 
<------><------>pos = intel_pt_add_gp_regs(&sample.intr_regs, regs, items, regs_mask);
 
<------><------>intel_pt_add_xmm(&sample.intr_regs, pos, items, regs_mask);
<------>}
 
<------>if (sample_type & PERF_SAMPLE_BRANCH_STACK) {
<------><------>if (items->mask[INTEL_PT_LBR_0_POS] ||
<------><------>    items->mask[INTEL_PT_LBR_1_POS] ||
<------><------>    items->mask[INTEL_PT_LBR_2_POS]) {
<------><------><------>intel_pt_add_lbrs(ptq->last_branch, items);
<------><------>} else if (pt->synth_opts.last_branch) {
<------><------><------>thread_stack__br_sample(ptq->thread, ptq->cpu,
<------><------><------><------><------><------>ptq->last_branch,
<------><------><------><------><------><------>pt->br_stack_sz);
<------><------>} else {
<------><------><------>ptq->last_branch->nr = 0;
<------><------>}
<------><------>sample.branch_stack = ptq->last_branch;
<------>}
 
<------>if (sample_type & PERF_SAMPLE_ADDR && items->has_mem_access_address)
<------><------>sample.addr = items->mem_access_address;
 
<------>if (sample_type & PERF_SAMPLE_WEIGHT) {
<------><------>/*
<------><------> * Refer kernel's setup_pebs_adaptive_sample_data() and
<------><------> * intel_hsw_weight().
<------><------> */
<------><------>if (items->has_mem_access_latency)
<------><------><------>sample.weight = items->mem_access_latency;
<------><------>if (!sample.weight && items->has_tsx_aux_info) {
<------><------><------>/* Cycles last block */
<------><------><------>sample.weight = (u32)items->tsx_aux_info;
<------><------>}
<------>}
 
<------>if (sample_type & PERF_SAMPLE_TRANSACTION && items->has_tsx_aux_info) {
<------><------>u64 ax = items->has_rax ? items->rax : 0;
<------><------>/* Refer kernel's intel_hsw_transaction() */
<------><------>u64 txn = (u8)(items->tsx_aux_info >> 32);
 
<------><------>/* For RTM XABORTs also log the abort code from AX */
<------><------>if (txn & PERF_TXN_TRANSACTION && ax & 1)
<------><------><------>txn |= ((ax >> 24) & 0xff) << PERF_TXN_ABORT_SHIFT;
<------><------>sample.transaction = txn;
<------>}
 
<------>return intel_pt_deliver_synth_event(pt, event, &sample, sample_type);
}
 
static int intel_pt_synth_error(struct intel_pt *pt, int code, int cpu,
<------><------><------><------>pid_t pid, pid_t tid, u64 ip, u64 timestamp)
{
<------>union perf_event event;
<------>char msg[MAX_AUXTRACE_ERROR_MSG];
<------>int err;
 
<------>if (pt->synth_opts.error_minus_flags) {
<------><------>if (code == INTEL_PT_ERR_OVR &&
<------><------>    pt->synth_opts.error_minus_flags & AUXTRACE_ERR_FLG_OVERFLOW)
<------><------><------>return 0;
<------><------>if (code == INTEL_PT_ERR_LOST &&
<------><------>    pt->synth_opts.error_minus_flags & AUXTRACE_ERR_FLG_DATA_LOST)
<------><------><------>return 0;
<------>}
 
<------>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, timestamp);
 
<------>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_ptq_synth_error(struct intel_pt_queue *ptq,
<------><------><------><------> const struct intel_pt_state *state)
{
<------>struct intel_pt *pt = ptq->pt;
<------>u64 tm = ptq->timestamp;
 
<------>tm = pt->timeless_decoding ? 0 : tsc_to_perf_time(tm, &pt->tc);
 
<------>return intel_pt_synth_error(pt, state->err, ptq->cpu, ptq->pid,
<------><------><------><------>    ptq->tid, state->from_ip, tm);
}
 
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));
}
 
#define INTEL_PT_PWR_EVT (INTEL_PT_MWAIT_OP | INTEL_PT_PWR_ENTRY | \
<------><------><------>  INTEL_PT_EX_STOP | INTEL_PT_PWR_EXIT)
 
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;
 
<------>ptq->ipc_insn_cnt = ptq->state->tot_insn_cnt;
<------>ptq->ipc_cyc_cnt = ptq->state->tot_cyc_cnt;
 
<------>/*
<------> * Do PEBS first to allow for the possibility that the PEBS timestamp
<------> * precedes the current timestamp.
<------> */
<------>if (pt->sample_pebs && state->type & INTEL_PT_BLK_ITEMS) {
<------><------>err = intel_pt_synth_pebs_sample(ptq);
<------><------>if (err)
<------><------><------>return err;
<------>}
 
<------>if (pt->sample_pwr_events) {
<------><------>if (ptq->state->cbr != ptq->cbr_seen) {
<------><------><------>err = intel_pt_synth_cbr_sample(ptq);
<------><------><------>if (err)
<------><------><------><------>return err;
<------><------>}
<------><------>if (state->type & INTEL_PT_PWR_EVT) {
<------><------><------>if (state->type & INTEL_PT_MWAIT_OP) {
<------><------><------><------>err = intel_pt_synth_mwait_sample(ptq);
<------><------><------><------>if (err)
<------><------><------><------><------>return err;
<------><------><------>}
<------><------><------>if (state->type & INTEL_PT_PWR_ENTRY) {
<------><------><------><------>err = intel_pt_synth_pwre_sample(ptq);
<------><------><------><------>if (err)
<------><------><------><------><------>return err;
<------><------><------>}
<------><------><------>if (state->type & INTEL_PT_EX_STOP) {
<------><------><------><------>err = intel_pt_synth_exstop_sample(ptq);
<------><------><------><------>if (err)
<------><------><------><------><------>return err;
<------><------><------>}
<------><------><------>if (state->type & INTEL_PT_PWR_EXIT) {
<------><------><------><------>err = intel_pt_synth_pwrx_sample(ptq);
<------><------><------><------>if (err)
<------><------><------><------><------>return err;
<------><------><------>}
<------><------>}
<------>}
 
<------>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 (pt->sample_ptwrites && (state->type & INTEL_PT_PTW)) {
<------><------>err = intel_pt_synth_ptwrite_sample(ptq);
<------><------>if (err)
<------><------><------>return err;
<------>}
 
<------>if (!(state->type & INTEL_PT_BRANCH))
<------><------>return 0;
 
<------>if (pt->use_thread_stack) {
<------><------>thread_stack__event(ptq->thread, ptq->cpu, ptq->flags,
<------><------><------><------>    state->from_ip, state->to_ip, ptq->insn_len,
<------><------><------><------>    state->trace_nr, pt->callstack,
<------><------><------><------>    pt->br_stack_sz_plus,
<------><------><------><------>    pt->mispred_all);
<------>} else {
<------><------>thread_stack__set_trace_nr(ptq->thread, ptq->cpu, state->trace_nr);
<------>}
 
<------>if (pt->sample_branches) {
<------><------>err = intel_pt_synth_branch_sample(ptq);
<------><------>if (err)
<------><------><------>return err;
<------>}
 
<------>if (!ptq->sync_switch)
<------><------>return 0;
 
<------>if (intel_pt_is_switch_ip(ptq, state->to_ip)) {
<------><------>switch (ptq->switch_state) {
<------><------>case INTEL_PT_SS_NOT_TRACING:
<------><------>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 intel_pt *pt, u64 *ptss_ip)
{
<------>struct machine *machine = pt->machine;
<------>struct map *map;
<------>struct symbol *sym, *start;
<------>u64 ip, switch_ip = 0;
<------>const char *ptss;
 
<------>if (ptss_ip)
<------><------>*ptss_ip = 0;
 
<------>map = machine__kernel_map(machine);
<------>if (!map)
<------><------>return 0;
 
<------>if (map__load(map))
<------><------>return 0;
 
<------>start = dso__first_symbol(map->dso);
 
<------>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;
 
<------>if (pt->have_sched_switch == 1)
<------><------>ptss = "perf_trace_sched_switch";
<------>else
<------><------>ptss = "__perf_event_task_sched_out";
 
<------>for (sym = start; sym; sym = dso__next_symbol(sym)) {
<------><------>if (!strcmp(sym->name, ptss)) {
<------><------><------>ip = map->unmap_ip(map, sym->start);
<------><------><------>if (ip >= map->start && ip < map->end) {
<------><------><------><------>*ptss_ip = ip;
<------><------><------><------>break;
<------><------><------>}
<------><------>}
<------>}
 
<------>return switch_ip;
}
 
static void intel_pt_enable_sync_switch(struct intel_pt *pt)
{
<------>unsigned int i;
 
<------>pt->sync_switch = true;
 
<------>for (i = 0; i < pt->queues.nr_queues; i++) {
<------><------>struct auxtrace_queue *queue = &pt->queues.queue_array[i];
<------><------>struct intel_pt_queue *ptq = queue->priv;
 
<------><------>if (ptq)
<------><------><------>ptq->sync_switch = true;
<------>}
}
 
/*
 * To filter against time ranges, it is only necessary to look at the next start
 * or end time.
 */
static bool intel_pt_next_time(struct intel_pt_queue *ptq)
{
<------>struct intel_pt *pt = ptq->pt;
 
<------>if (ptq->sel_start) {
<------><------>/* Next time is an end time */
<------><------>ptq->sel_start = false;
<------><------>ptq->sel_timestamp = pt->time_ranges[ptq->sel_idx].end;
<------><------>return true;
<------>} else if (ptq->sel_idx + 1 < pt->range_cnt) {
<------><------>/* Next time is a start time */
<------><------>ptq->sel_start = true;
<------><------>ptq->sel_idx += 1;
<------><------>ptq->sel_timestamp = pt->time_ranges[ptq->sel_idx].start;
<------><------>return true;
<------>}
 
<------>/* No next time */
<------>return false;
}
 
static int intel_pt_time_filter(struct intel_pt_queue *ptq, u64 *ff_timestamp)
{
<------>int err;
 
<------>while (1) {
<------><------>if (ptq->sel_start) {
<------><------><------>if (ptq->timestamp >= ptq->sel_timestamp) {
<------><------><------><------>/* After start time, so consider next time */
<------><------><------><------>intel_pt_next_time(ptq);
<------><------><------><------>if (!ptq->sel_timestamp) {
<------><------><------><------><------>/* No end time */
<------><------><------><------><------>return 0;
<------><------><------><------>}
<------><------><------><------>/* Check against end time */
<------><------><------><------>continue;
<------><------><------>}
<------><------><------>/* Before start time, so fast forward */
<------><------><------>ptq->have_sample = false;
<------><------><------>if (ptq->sel_timestamp > *ff_timestamp) {
<------><------><------><------>if (ptq->sync_switch) {
<------><------><------><------><------>intel_pt_next_tid(ptq->pt, ptq);
<------><------><------><------><------>ptq->switch_state = INTEL_PT_SS_UNKNOWN;
<------><------><------><------>}
<------><------><------><------>*ff_timestamp = ptq->sel_timestamp;
<------><------><------><------>err = intel_pt_fast_forward(ptq->decoder,
<------><------><------><------><------><------><------>    ptq->sel_timestamp);
<------><------><------><------>if (err)
<------><------><------><------><------>return err;
<------><------><------>}
<------><------><------>return 0;
<------><------>} else if (ptq->timestamp > ptq->sel_timestamp) {
<------><------><------>/* After end time, so consider next time */
<------><------><------>if (!intel_pt_next_time(ptq)) {
<------><------><------><------>/* No next time range, so stop decoding */
<------><------><------><------>ptq->have_sample = false;
<------><------><------><------>ptq->switch_state = INTEL_PT_SS_NOT_TRACING;
<------><------><------><------>return 1;
<------><------><------>}
<------><------><------>/* Check against next start time */
<------><------><------>continue;
<------><------>} else {
<------><------><------>/* Before end time */
<------><------><------>return 0;
<------><------>}
<------>}
}
 
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;
<------>u64 ff_timestamp = 0;
<------>int err;
 
<------>if (!pt->kernel_start) {
<------><------>pt->kernel_start = machine__kernel_start(pt->machine);
<------><------>if (pt->per_cpu_mmaps &&
<------><------>    (pt->have_sched_switch == 1 || pt->have_sched_switch == 3) &&
<------><------>    !pt->timeless_decoding && intel_pt_tracing_kernel(pt) &&
<------><------>    !pt->sampling_mode) {
<------><------><------>pt->switch_ip = intel_pt_switch_ip(pt, &pt->ptss_ip);
<------><------><------>if (pt->switch_ip) {
<------><------><------><------>intel_pt_log("switch_ip: %"PRIx64" ptss_ip: %"PRIx64"\n",
<------><------><------><------><------>     pt->switch_ip, pt->ptss_ip);
<------><------><------><------>intel_pt_enable_sync_switch(pt);
<------><------><------>}
<------><------>}
<------>}
 
<------>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 (ptq->sync_switch &&
<------><------><------>    state->from_ip >= pt->kernel_start) {
<------><------><------><------>ptq->sync_switch = false;
<------><------><------><------>intel_pt_next_tid(pt, ptq);
<------><------><------>}
<------><------><------>ptq->timestamp = state->est_timestamp;
<------><------><------>if (pt->synth_opts.errors) {
<------><------><------><------>err = intel_ptq_synth_error(ptq, state);
<------><------><------><------>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 &&
<------><------>    (state->from_ip >= pt->kernel_start || !state->from_ip) &&
<------><------>    state->to_ip && state->to_ip < pt->kernel_start) {
<------><------><------>intel_pt_log("TSC %"PRIx64" est. TSC %"PRIx64"\n",
<------><------><------><------>     state->timestamp, state->est_timestamp);
<------><------><------>ptq->timestamp = state->est_timestamp;
<------><------>/* Use estimated TSC in unknown switch state */
<------><------>} else if (ptq->sync_switch &&
<------><------><------>   ptq->switch_state == INTEL_PT_SS_UNKNOWN &&
<------><------><------>   intel_pt_is_switch_ip(ptq, state->to_ip) &&
<------><------><------>   ptq->next_tid == -1) {
<------><------><------>intel_pt_log("TSC %"PRIx64" est. TSC %"PRIx64"\n",
<------><------><------><------>     state->timestamp, state->est_timestamp);
<------><------><------>ptq->timestamp = state->est_timestamp;
<------><------>} else if (state->timestamp > ptq->timestamp) {
<------><------><------>ptq->timestamp = state->timestamp;
<------><------>}
 
<------><------>if (ptq->sel_timestamp) {
<------><------><------>err = intel_pt_time_filter(ptq, &ff_timestamp);
<------><------><------>if (err)
<------><------><------><------>return err;
<------><------>}
 
<------><------>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 void intel_pt_sample_set_pid_tid_cpu(struct intel_pt_queue *ptq,
<------><------><------><------><------>    struct auxtrace_queue *queue,
<------><------><------><------><------>    struct perf_sample *sample)
{
<------>struct machine *m = ptq->pt->machine;
 
<------>ptq->pid = sample->pid;
<------>ptq->tid = sample->tid;
<------>ptq->cpu = queue->cpu;
 
<------>intel_pt_log("queue %u cpu %d pid %d tid %d\n",
<------><------>     ptq->queue_nr, ptq->cpu, ptq->pid, ptq->tid);
 
<------>thread__zput(ptq->thread);
 
<------>if (ptq->tid == -1)
<------><------>return;
 
<------>if (ptq->pid == -1) {
<------><------>ptq->thread = machine__find_thread(m, -1, ptq->tid);
<------><------>if (ptq->thread)
<------><------><------>ptq->pid = ptq->thread->pid_;
<------><------>return;
<------>}
 
<------>ptq->thread = machine__findnew_thread(m, ptq->pid, ptq->tid);
}
 
static int intel_pt_process_timeless_sample(struct intel_pt *pt,
<------><------><------><------><------>    struct perf_sample *sample)
{
<------>struct auxtrace_queue *queue;
<------>struct intel_pt_queue *ptq;
<------>u64 ts = 0;
 
<------>queue = auxtrace_queues__sample_queue(&pt->queues, sample, pt->session);
<------>if (!queue)
<------><------>return -EINVAL;
 
<------>ptq = queue->priv;
<------>if (!ptq)
<------><------>return 0;
 
<------>ptq->stop = false;
<------>ptq->time = sample->time;
<------>intel_pt_sample_set_pid_tid_cpu(ptq, queue, sample);
<------>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, sample->time);
}
 
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_sync_switch(struct intel_pt *pt, int cpu, pid_t tid,
<------><------><------><------>u64 timestamp)
{
<------>struct intel_pt_queue *ptq;
<------>int err;
 
<------>if (!pt->sync_switch)
<------><------>return 1;
 
<------>ptq = intel_pt_cpu_to_ptq(pt, cpu);
<------>if (!ptq || !ptq->sync_switch)
<------><------>return 1;
 
<------>switch (ptq->switch_state) {
<------>case INTEL_PT_SS_NOT_TRACING:
<------><------>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(timestamp,
<------><------><------><------><------><------><------>  &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:
<------><------>intel_pt_log("ERROR: cpu %d expecting switch ip\n", cpu);
<------><------>break;
<------>default:
<------><------>break;
<------>}
 
<------>ptq->next_tid = -1;
 
<------>return 1;
}
 
static int intel_pt_process_switch(struct intel_pt *pt,
<------><------><------><------>   struct perf_sample *sample)
{
<------>struct evsel *evsel;
<------>pid_t tid;
<------>int cpu, ret;
 
<------>evsel = perf_evlist__id2evsel(pt->session->evlist, sample->id);
<------>if (evsel != pt->switch_evsel)
<------><------>return 0;
 
<------>tid = 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));
 
<------>ret = intel_pt_sync_switch(pt, cpu, tid, sample->time);
<------>if (ret <= 0)
<------><------>return ret;
 
<------>return machine__set_current_tid(pt->machine, cpu, -1, tid);
}
 
static int intel_pt_context_switch_in(struct intel_pt *pt,
<------><------><------><------>      struct perf_sample *sample)
{
<------>pid_t pid = sample->pid;
<------>pid_t tid = sample->tid;
<------>int cpu = sample->cpu;
 
<------>if (pt->sync_switch) {
<------><------>struct intel_pt_queue *ptq;
 
<------><------>ptq = intel_pt_cpu_to_ptq(pt, cpu);
<------><------>if (ptq && ptq->sync_switch) {
<------><------><------>ptq->next_tid = -1;
<------><------><------>switch (ptq->switch_state) {
<------><------><------>case INTEL_PT_SS_NOT_TRACING:
<------><------><------>case INTEL_PT_SS_UNKNOWN:
<------><------><------>case INTEL_PT_SS_TRACING:
<------><------><------><------>break;
<------><------><------>case INTEL_PT_SS_EXPECTING_SWITCH_EVENT:
<------><------><------>case INTEL_PT_SS_EXPECTING_SWITCH_IP:
<------><------><------><------>ptq->switch_state = INTEL_PT_SS_TRACING;
<------><------><------><------>break;
<------><------><------>default:
<------><------><------><------>break;
<------><------><------>}
<------><------>}
<------>}
 
<------>/*
<------> * If the current tid has not been updated yet, ensure it is now that
<------> * a "switch in" event has occurred.
<------> */
<------>if (machine__get_current_tid(pt->machine, cpu) == tid)
<------><------>return 0;
 
<------>return machine__set_current_tid(pt->machine, cpu, pid, tid);
}
 
static int intel_pt_context_switch(struct intel_pt *pt, union perf_event *event,
<------><------><------><------>   struct perf_sample *sample)
{
<------>bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
<------>pid_t pid, tid;
<------>int cpu, ret;
 
<------>cpu = sample->cpu;
 
<------>if (pt->have_sched_switch == 3) {
<------><------>if (!out)
<------><------><------>return intel_pt_context_switch_in(pt, sample);
<------><------>if (event->header.type != PERF_RECORD_SWITCH_CPU_WIDE) {
<------><------><------>pr_err("Expecting CPU-wide context switch event\n");
<------><------><------>return -EINVAL;
<------><------>}
<------><------>pid = event->context_switch.next_prev_pid;
<------><------>tid = event->context_switch.next_prev_tid;
<------>} else {
<------><------>if (out)
<------><------><------>return 0;
<------><------>pid = sample->pid;
<------><------>tid = sample->tid;
<------>}
 
<------>if (tid == -1)
<------><------>intel_pt_log("context_switch event has no tid\n");
 
<------>ret = intel_pt_sync_switch(pt, cpu, tid, sample->time);
<------>if (ret <= 0)
<------><------>return ret;
 
<------>return machine__set_current_tid(pt->machine, cpu, pid, 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_find_map(struct thread *thread, u8 cpumode, u64 addr,
<------><------><------>     struct addr_location *al)
{
<------>if (!al->map || addr < al->map->start || addr >= al->map->end) {
<------><------>if (!thread__find_map(thread, cpumode, addr, al))
<------><------><------>return -1;
<------>}
 
<------>return 0;
}
 
/* Invalidate all instruction cache entries that overlap the text poke */
static int intel_pt_text_poke(struct intel_pt *pt, union perf_event *event)
{
<------>u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
<------>u64 addr = event->text_poke.addr + event->text_poke.new_len - 1;
<------>/* Assume text poke begins in a basic block no more than 4096 bytes */
<------>int cnt = 4096 + event->text_poke.new_len;
<------>struct thread *thread = pt->unknown_thread;
<------>struct addr_location al = { .map = NULL };
<------>struct machine *machine = pt->machine;
<------>struct intel_pt_cache_entry *e;
<------>u64 offset;
 
<------>if (!event->text_poke.new_len)
<------><------>return 0;
 
<------>for (; cnt; cnt--, addr--) {
<------><------>if (intel_pt_find_map(thread, cpumode, addr, &al)) {
<------><------><------>if (addr < event->text_poke.addr)
<------><------><------><------>return 0;
<------><------><------>continue;
<------><------>}
 
<------><------>if (!al.map->dso || !al.map->dso->auxtrace_cache)
<------><------><------>continue;
 
<------><------>offset = al.map->map_ip(al.map, addr);
 
<------><------>e = intel_pt_cache_lookup(al.map->dso, machine, offset);
<------><------>if (!e)
<------><------><------>continue;
 
<------><------>if (addr + e->byte_cnt + e->length <= event->text_poke.addr) {
<------><------><------>/*
<------><------><------> * No overlap. Working backwards there cannot be another
<------><------><------> * basic block that overlaps the text poke if there is a
<------><------><------> * branch instruction before the text poke address.
<------><------><------> */
<------><------><------>if (e->branch != INTEL_PT_BR_NO_BRANCH)
<------><------><------><------>return 0;
<------><------>} else {
<------><------><------>intel_pt_cache_invalidate(al.map->dso, machine, offset);
<------><------><------>intel_pt_log("Invalidated instruction cache for %s at %#"PRIx64"\n",
<------><------><------><------>     al.map->dso->long_name, addr);
<------><------>}
<------>}
 
<------>return 0;
}
 
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 && sample->time != (u64)-1)
<------><------>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 (pt->sampling_mode) {
<------><------><------>if (sample->aux_sample.size)
<------><------><------><------>err = intel_pt_process_timeless_sample(pt,
<------><------><------><------><------><------><------><------>       sample);
<------><------>} else if (event->header.type == PERF_RECORD_EXIT) {
<------><------><------>err = intel_pt_process_timeless_queues(pt,
<------><------><------><------><------><------><------>       event->fork.tid,
<------><------><------><------><------><------><------>       sample->time);
<------><------>}
<------>} else if (timestamp) {
<------><------>err = intel_pt_process_queues(pt, timestamp);
<------>}
<------>if (err)
<------><------>return err;
 
<------>if (event->header.type == PERF_RECORD_SAMPLE) {
<------><------>if (pt->synth_opts.add_callchain && !sample->callchain)
<------><------><------>intel_pt_add_callchain(pt, sample);
<------><------>if (pt->synth_opts.add_last_branch && !sample->branch_stack)
<------><------><------>intel_pt_add_br_stack(pt, sample);
<------>}
 
<------>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 (err)
<------><------><------>return err;
<------>}
 
<------>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);
<------>else if (event->header.type == PERF_RECORD_SWITCH ||
<------><------> event->header.type == PERF_RECORD_SWITCH_CPU_WIDE)
<------><------>err = intel_pt_context_switch(pt, event, sample);
 
<------>if (!err && event->header.type == PERF_RECORD_TEXT_POKE)
<------><------>err = intel_pt_text_poke(pt, event);
 
<------>if (intel_pt_enable_logging && intel_pt_log_events(pt, sample->time)) {
<------><------>intel_pt_log("event %u: cpu %d time %"PRIu64" tsc %#"PRIx64" ",
<------><------><------>     event->header.type, sample->cpu, sample->time, timestamp);
<------><------>intel_pt_log_event(event);
<------>}
 
<------>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__put(pt->unknown_thread);
<------>addr_filters__exit(&pt->filts);
<------>zfree(&pt->chain);
<------>zfree(&pt->filter);
<------>zfree(&pt->time_ranges);
<------>free(pt);
}
 
static bool intel_pt_evsel_is_auxtrace(struct perf_session *session,
<------><------><------><------>       struct evsel *evsel)
{
<------>struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt,
<------><------><------><------><------>   auxtrace);
 
<------>return evsel->core.attr.type == pt->pmu_type;
}
 
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->data_queued) {
<------><------>struct auxtrace_buffer *buffer;
<------><------>off_t data_offset;
<------><------>int fd = perf_data__fd(session->data);
<------><------>int err;
 
<------><------>if (perf_data__is_pipe(session->data)) {
<------><------><------>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;
}
 
static int intel_pt_queue_data(struct perf_session *session,
<------><------><------>       struct perf_sample *sample,
<------><------><------>       union perf_event *event, u64 data_offset)
{
<------>struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt,
<------><------><------><------><------>   auxtrace);
<------>u64 timestamp;
 
<------>if (event) {
<------><------>return auxtrace_queues__add_event(&pt->queues, session, event,
<------><------><------><------><------><------>  data_offset, NULL);
<------>}
 
<------>if (sample->time && sample->time != (u64)-1)
<------><------>timestamp = perf_time_to_tsc(sample->time, &pt->tc);
<------>else
<------><------>timestamp = 0;
 
<------>return auxtrace_queues__add_sample(&pt->queues, session, sample,
<------><------><------><------><------>   data_offset, timestamp);
}
 
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, const char *name,
<------><------><------><------>struct perf_event_attr *attr, u64 id)
{
<------>struct intel_pt_synth intel_pt_synth;
<------>int err;
 
<------>pr_debug("Synthesizing '%s' event with id %" PRIu64 " sample type %#" PRIx64 "\n",
<------><------> name, id, (u64)attr->sample_type);
 
<------>memset(&intel_pt_synth, 0, sizeof(struct intel_pt_synth));
<------>intel_pt_synth.session = session;
 
<------>err = perf_event__synthesize_attr(&intel_pt_synth.dummy_tool, attr, 1,
<------><------><------><------><------>  &id, intel_pt_event_synth);
<------>if (err)
<------><------>pr_err("%s: failed to synthesize '%s' event type\n",
<------><------>       __func__, name);
 
<------>return err;
}
 
static void intel_pt_set_event_name(struct evlist *evlist, u64 id,
<------><------><------><------>    const char *name)
{
<------>struct evsel *evsel;
 
<------>evlist__for_each_entry(evlist, evsel) {
<------><------>if (evsel->core.id && evsel->core.id[0] == id) {
<------><------><------>if (evsel->name)
<------><------><------><------>zfree(&evsel->name);
<------><------><------>evsel->name = strdup(name);
<------><------><------>break;
<------><------>}
<------>}
}
 
static struct evsel *intel_pt_evsel(struct intel_pt *pt,
<------><------><------><------><------> struct evlist *evlist)
{
<------>struct evsel *evsel;
 
<------>evlist__for_each_entry(evlist, evsel) {
<------><------>if (evsel->core.attr.type == pt->pmu_type && evsel->core.ids)
<------><------><------>return evsel;
<------>}
 
<------>return NULL;
}
 
static int intel_pt_synth_events(struct intel_pt *pt,
<------><------><------><------> struct perf_session *session)
{
<------>struct evlist *evlist = session->evlist;
<------>struct evsel *evsel = intel_pt_evsel(pt, evlist);
<------>struct perf_event_attr attr;
<------>u64 id;
<------>int err;
 
<------>if (!evsel) {
<------><------>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->core.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->core.attr.exclude_user;
<------>attr.exclude_kernel = evsel->core.attr.exclude_kernel;
<------>attr.exclude_hv = evsel->core.attr.exclude_hv;
<------>attr.exclude_host = evsel->core.attr.exclude_host;
<------>attr.exclude_guest = evsel->core.attr.exclude_guest;
<------>attr.sample_id_all = evsel->core.attr.sample_id_all;
<------>attr.read_format = evsel->core.attr.read_format;
 
<------>id = evsel->core.id[0] + 1000000000;
<------>if (!id)
<------><------>id = 1;
 
<------>if (pt->synth_opts.branches) {
<------><------>attr.config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS;
<------><------>attr.sample_period = 1;
<------><------>attr.sample_type |= PERF_SAMPLE_ADDR;
<------><------>err = intel_pt_synth_event(session, "branches", &attr, id);
<------><------>if (err)
<------><------><------>return err;
<------><------>pt->sample_branches = true;
<------><------>pt->branches_sample_type = attr.sample_type;
<------><------>pt->branches_id = id;
<------><------>id += 1;
<------><------>attr.sample_type &= ~(u64)PERF_SAMPLE_ADDR;
<------>}
 
<------>if (pt->synth_opts.callchain)
<------><------>attr.sample_type |= PERF_SAMPLE_CALLCHAIN;
<------>if (pt->synth_opts.last_branch) {
<------><------>attr.sample_type |= PERF_SAMPLE_BRANCH_STACK;
<------><------>/*
<------><------> * We don't use the hardware index, but the sample generation
<------><------> * code uses the new format branch_stack with this field,
<------><------> * so the event attributes must indicate that it's present.
<------><------> */
<------><------>attr.branch_sample_type |= PERF_SAMPLE_BRANCH_HW_INDEX;
<------>}
 
<------>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;
<------><------>err = intel_pt_synth_event(session, "instructions", &attr, id);
<------><------>if (err)
<------><------><------>return err;
<------><------>pt->sample_instructions = true;
<------><------>pt->instructions_sample_type = attr.sample_type;
<------><------>pt->instructions_id = id;
<------><------>id += 1;
<------>}
 
<------>attr.sample_type &= ~(u64)PERF_SAMPLE_PERIOD;
<------>attr.sample_period = 1;
 
<------>if (pt->synth_opts.transactions) {
<------><------>attr.config = PERF_COUNT_HW_INSTRUCTIONS;
<------><------>err = intel_pt_synth_event(session, "transactions", &attr, id);
<------><------>if (err)
<------><------><------>return err;
<------><------>pt->sample_transactions = true;
<------><------>pt->transactions_sample_type = attr.sample_type;
<------><------>pt->transactions_id = id;
<------><------>intel_pt_set_event_name(evlist, id, "transactions");
<------><------>id += 1;
<------>}
 
<------>attr.type = PERF_TYPE_SYNTH;
<------>attr.sample_type |= PERF_SAMPLE_RAW;
 
<------>if (pt->synth_opts.ptwrites) {
<------><------>attr.config = PERF_SYNTH_INTEL_PTWRITE;
<------><------>err = intel_pt_synth_event(session, "ptwrite", &attr, id);
<------><------>if (err)
<------><------><------>return err;
<------><------>pt->sample_ptwrites = true;
<------><------>pt->ptwrites_sample_type = attr.sample_type;
<------><------>pt->ptwrites_id = id;
<------><------>intel_pt_set_event_name(evlist, id, "ptwrite");
<------><------>id += 1;
<------>}
 
<------>if (pt->synth_opts.pwr_events) {
<------><------>pt->sample_pwr_events = true;
<------><------>pt->pwr_events_sample_type = attr.sample_type;
 
<------><------>attr.config = PERF_SYNTH_INTEL_CBR;
<------><------>err = intel_pt_synth_event(session, "cbr", &attr, id);
<------><------>if (err)
<------><------><------>return err;
<------><------>pt->cbr_id = id;
<------><------>intel_pt_set_event_name(evlist, id, "cbr");
<------><------>id += 1;
<------>}
 
<------>if (pt->synth_opts.pwr_events && (evsel->core.attr.config & 0x10)) {
<------><------>attr.config = PERF_SYNTH_INTEL_MWAIT;
<------><------>err = intel_pt_synth_event(session, "mwait", &attr, id);
<------><------>if (err)
<------><------><------>return err;
<------><------>pt->mwait_id = id;
<------><------>intel_pt_set_event_name(evlist, id, "mwait");
<------><------>id += 1;
 
<------><------>attr.config = PERF_SYNTH_INTEL_PWRE;
<------><------>err = intel_pt_synth_event(session, "pwre", &attr, id);
<------><------>if (err)
<------><------><------>return err;
<------><------>pt->pwre_id = id;
<------><------>intel_pt_set_event_name(evlist, id, "pwre");
<------><------>id += 1;
 
<------><------>attr.config = PERF_SYNTH_INTEL_EXSTOP;
<------><------>err = intel_pt_synth_event(session, "exstop", &attr, id);
<------><------>if (err)
<------><------><------>return err;
<------><------>pt->exstop_id = id;
<------><------>intel_pt_set_event_name(evlist, id, "exstop");
<------><------>id += 1;
 
<------><------>attr.config = PERF_SYNTH_INTEL_PWRX;
<------><------>err = intel_pt_synth_event(session, "pwrx", &attr, id);
<------><------>if (err)
<------><------><------>return err;
<------><------>pt->pwrx_id = id;
<------><------>intel_pt_set_event_name(evlist, id, "pwrx");
<------><------>id += 1;
<------>}
 
<------>return 0;
}
 
static void intel_pt_setup_pebs_events(struct intel_pt *pt)
{
<------>struct evsel *evsel;
 
<------>if (!pt->synth_opts.other_events)
<------><------>return;
 
<------>evlist__for_each_entry(pt->session->evlist, evsel) {
<------><------>if (evsel->core.attr.aux_output && evsel->core.id) {
<------><------><------>pt->sample_pebs = true;
<------><------><------>pt->pebs_evsel = evsel;
<------><------><------>return;
<------><------>}
<------>}
}
 
static struct evsel *intel_pt_find_sched_switch(struct evlist *evlist)
{
<------>struct evsel *evsel;
 
<------>evlist__for_each_entry_reverse(evlist, evsel) {
<------><------>const char *name = evsel__name(evsel);
 
<------><------>if (!strcmp(name, "sched:sched_switch"))
<------><------><------>return evsel;
<------>}
 
<------>return NULL;
}
 
static bool intel_pt_find_switch(struct evlist *evlist)
{
<------>struct evsel *evsel;
 
<------>evlist__for_each_entry(evlist, evsel) {
<------><------>if (evsel->core.attr.context_switch)
<------><------><------>return true;
<------>}
 
<------>return false;
}
 
static int intel_pt_perf_config(const char *var, const char *value, void *data)
{
<------>struct intel_pt *pt = data;
 
<------>if (!strcmp(var, "intel-pt.mispred-all"))
<------><------>pt->mispred_all = perf_config_bool(var, value);
 
<------>return 0;
}
 
/* Find least TSC which converts to ns or later */
static u64 intel_pt_tsc_start(u64 ns, struct intel_pt *pt)
{
<------>u64 tsc, tm;
 
<------>tsc = perf_time_to_tsc(ns, &pt->tc);
 
<------>while (1) {
<------><------>tm = tsc_to_perf_time(tsc, &pt->tc);
<------><------>if (tm < ns)
<------><------><------>break;
<------><------>tsc -= 1;
<------>}
 
<------>while (tm < ns)
<------><------>tm = tsc_to_perf_time(++tsc, &pt->tc);
 
<------>return tsc;
}
 
/* Find greatest TSC which converts to ns or earlier */
static u64 intel_pt_tsc_end(u64 ns, struct intel_pt *pt)
{
<------>u64 tsc, tm;
 
<------>tsc = perf_time_to_tsc(ns, &pt->tc);
 
<------>while (1) {
<------><------>tm = tsc_to_perf_time(tsc, &pt->tc);
<------><------>if (tm > ns)
<------><------><------>break;
<------><------>tsc += 1;
<------>}
 
<------>while (tm > ns)
<------><------>tm = tsc_to_perf_time(--tsc, &pt->tc);
 
<------>return tsc;
}
 
static int intel_pt_setup_time_ranges(struct intel_pt *pt,
<------><------><------><------>      struct itrace_synth_opts *opts)
{
<------>struct perf_time_interval *p = opts->ptime_range;
<------>int n = opts->range_num;
<------>int i;
 
<------>if (!n || !p || pt->timeless_decoding)
<------><------>return 0;
 
<------>pt->time_ranges = calloc(n, sizeof(struct range));
<------>if (!pt->time_ranges)
<------><------>return -ENOMEM;
 
<------>pt->range_cnt = n;
 
<------>intel_pt_log("%s: %u range(s)\n", __func__, n);
 
<------>for (i = 0; i < n; i++) {
<------><------>struct range *r = &pt->time_ranges[i];
<------><------>u64 ts = p[i].start;
<------><------>u64 te = p[i].end;
 
<------><------>/*
<------><------> * Take care to ensure the TSC range matches the perf-time range
<------><------> * when converted back to perf-time.
<------><------> */
<------><------>r->start = ts ? intel_pt_tsc_start(ts, pt) : 0;
<------><------>r->end   = te ? intel_pt_tsc_end(te, pt) : 0;
 
<------><------>intel_pt_log("range %d: perf time interval: %"PRIu64" to %"PRIu64"\n",
<------><------><------>     i, ts, te);
<------><------>intel_pt_log("range %d: TSC time interval: %#"PRIx64" to %#"PRIx64"\n",
<------><------><------>     i, r->start, r->end);
<------>}
 
<------>return 0;
}
 
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",
<------>[INTEL_PT_MTC_BIT]		= "  MTC bit             %#"PRIx64"\n",
<------>[INTEL_PT_TSC_CTC_N]		= "  TSC:CTC numerator   %"PRIu64"\n",
<------>[INTEL_PT_TSC_CTC_D]		= "  TSC:CTC denominator %"PRIu64"\n",
<------>[INTEL_PT_CYC_BIT]		= "  CYC bit             %#"PRIx64"\n",
<------>[INTEL_PT_MAX_NONTURBO_RATIO]	= "  Max non-turbo ratio %"PRIu64"\n",
<------>[INTEL_PT_FILTER_STR_LEN]	= "  Filter string len.  %"PRIu64"\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]);
}
 
static void intel_pt_print_info_str(const char *name, const char *str)
{
<------>if (!dump_trace)
<------><------>return;
 
<------>fprintf(stdout, "  %-20s%s\n", name, str ? str : "");
}
 
static bool intel_pt_has(struct perf_record_auxtrace_info *auxtrace_info, int pos)
{
<------>return auxtrace_info->header.size >=
<------><------>sizeof(struct perf_record_auxtrace_info) + (sizeof(u64) * (pos + 1));
}
 
int intel_pt_process_auxtrace_info(union perf_event *event,
<------><------><------><------>   struct perf_session *session)
{
<------>struct perf_record_auxtrace_info *auxtrace_info = &event->auxtrace_info;
<------>size_t min_sz = sizeof(u64) * INTEL_PT_PER_CPU_MMAPS;
<------>struct intel_pt *pt;
<------>void *info_end;
<------>__u64 *info;
<------>int err;
 
<------>if (auxtrace_info->header.size < sizeof(struct perf_record_auxtrace_info) +
<------><------><------><------><------>min_sz)
<------><------>return -EINVAL;
 
<------>pt = zalloc(sizeof(struct intel_pt));
<------>if (!pt)
<------><------>return -ENOMEM;
 
<------>addr_filters__init(&pt->filts);
 
<------>err = perf_config(intel_pt_perf_config, pt);
<------>if (err)
<------><------>goto err_free;
 
<------>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);
 
<------>if (intel_pt_has(auxtrace_info, INTEL_PT_CYC_BIT)) {
<------><------>pt->mtc_bit = auxtrace_info->priv[INTEL_PT_MTC_BIT];
<------><------>pt->mtc_freq_bits = auxtrace_info->priv[INTEL_PT_MTC_FREQ_BITS];
<------><------>pt->tsc_ctc_ratio_n = auxtrace_info->priv[INTEL_PT_TSC_CTC_N];
<------><------>pt->tsc_ctc_ratio_d = auxtrace_info->priv[INTEL_PT_TSC_CTC_D];
<------><------>pt->cyc_bit = auxtrace_info->priv[INTEL_PT_CYC_BIT];
<------><------>intel_pt_print_info(&auxtrace_info->priv[0], INTEL_PT_MTC_BIT,
<------><------><------><------>    INTEL_PT_CYC_BIT);
<------>}
 
<------>if (intel_pt_has(auxtrace_info, INTEL_PT_MAX_NONTURBO_RATIO)) {
<------><------>pt->max_non_turbo_ratio =
<------><------><------>auxtrace_info->priv[INTEL_PT_MAX_NONTURBO_RATIO];
<------><------>intel_pt_print_info(&auxtrace_info->priv[0],
<------><------><------><------>    INTEL_PT_MAX_NONTURBO_RATIO,
<------><------><------><------>    INTEL_PT_MAX_NONTURBO_RATIO);
<------>}
 
<------>info = &auxtrace_info->priv[INTEL_PT_FILTER_STR_LEN] + 1;
<------>info_end = (void *)info + auxtrace_info->header.size;
 
<------>if (intel_pt_has(auxtrace_info, INTEL_PT_FILTER_STR_LEN)) {
<------><------>size_t len;
 
<------><------>len = auxtrace_info->priv[INTEL_PT_FILTER_STR_LEN];
<------><------>intel_pt_print_info(&auxtrace_info->priv[0],
<------><------><------><------>    INTEL_PT_FILTER_STR_LEN,
<------><------><------><------>    INTEL_PT_FILTER_STR_LEN);
<------><------>if (len) {
<------><------><------>const char *filter = (const char *)info;
 
<------><------><------>len = roundup(len + 1, 8);
<------><------><------>info += len >> 3;
<------><------><------>if ((void *)info > info_end) {
<------><------><------><------>pr_err("%s: bad filter string length\n", __func__);
<------><------><------><------>err = -EINVAL;
<------><------><------><------>goto err_free_queues;
<------><------><------>}
<------><------><------>pt->filter = memdup(filter, len);
<------><------><------>if (!pt->filter) {
<------><------><------><------>err = -ENOMEM;
<------><------><------><------>goto err_free_queues;
<------><------><------>}
<------><------><------>if (session->header.needs_swap)
<------><------><------><------>mem_bswap_64(pt->filter, len);
<------><------><------>if (pt->filter[len - 1]) {
<------><------><------><------>pr_err("%s: filter string not null terminated\n", __func__);
<------><------><------><------>err = -EINVAL;
<------><------><------><------>goto err_free_queues;
<------><------><------>}
<------><------><------>err = addr_filters__parse_bare_filter(&pt->filts,
<------><------><------><------><------><------><------>      filter);
<------><------><------>if (err)
<------><------><------><------>goto err_free_queues;
<------><------>}
<------><------>intel_pt_print_info_str("Filter string", pt->filter);
<------>}
 
<------>pt->timeless_decoding = intel_pt_timeless_decoding(pt);
<------>if (pt->timeless_decoding && !pt->tc.time_mult)
<------><------>pt->tc.time_mult = 1;
<------>pt->have_tsc = intel_pt_have_tsc(pt);
<------>pt->sampling_mode = intel_pt_sampling_mode(pt);
<------>pt->est_tsc = !pt->timeless_decoding;
 
<------>pt->unknown_thread = thread__new(999999999, 999999999);
<------>if (!pt->unknown_thread) {
<------><------>err = -ENOMEM;
<------><------>goto err_free_queues;
<------>}
 
<------>/*
<------> * Since this thread will not be kept in any rbtree not in a
<------> * list, initialize its list node so that at thread__put() the
<------> * current thread lifetime assuption is kept and we don't segfault
<------> * at list_del_init().
<------> */
<------>INIT_LIST_HEAD(&pt->unknown_thread->node);
 
<------>err = thread__set_comm(pt->unknown_thread, "unknown", 0);
<------>if (err)
<------><------>goto err_delete_thread;
<------>if (thread__init_maps(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.queue_data = intel_pt_queue_data;
<------>pt->auxtrace.dump_auxtrace_sample = intel_pt_dump_sample;
<------>pt->auxtrace.flush_events = intel_pt_flush;
<------>pt->auxtrace.free_events = intel_pt_free_events;
<------>pt->auxtrace.free = intel_pt_free;
<------>pt->auxtrace.evsel_is_auxtrace = intel_pt_evsel_is_auxtrace;
<------>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__);
<------><------><------>err = -EINVAL;
<------><------><------>goto err_delete_thread;
<------><------>}
<------>} else if (pt->have_sched_switch == 2 &&
<------><------>   !intel_pt_find_switch(session->evlist)) {
<------><------>pr_err("%s: missing context_switch attribute flag\n", __func__);
<------><------>err = -EINVAL;
<------><------>goto err_delete_thread;
<------>}
 
<------>if (session->itrace_synth_opts->set) {
<------><------>pt->synth_opts = *session->itrace_synth_opts;
<------>} else {
<------><------>itrace_synth_opts__set_default(&pt->synth_opts,
<------><------><------><------>session->itrace_synth_opts->default_no_sample);
<------><------>if (!session->itrace_synth_opts->default_no_sample &&
<------><------>    !session->itrace_synth_opts->inject) {
<------><------><------>pt->synth_opts.branches = false;
<------><------><------>pt->synth_opts.callchain = true;
<------><------><------>pt->synth_opts.add_callchain = true;
<------><------>}
<------><------>pt->synth_opts.thread_stack =
<------><------><------><------>session->itrace_synth_opts->thread_stack;
<------>}
 
<------>if (pt->synth_opts.log)
<------><------>intel_pt_log_enable();
 
<------>/* Maximum non-turbo ratio is TSC freq / 100 MHz */
<------>if (pt->tc.time_mult) {
<------><------>u64 tsc_freq = intel_pt_ns_to_ticks(pt, 1000000000);
 
<------><------>if (!pt->max_non_turbo_ratio)
<------><------><------>pt->max_non_turbo_ratio =
<------><------><------><------><------>(tsc_freq + 50000000) / 100000000;
<------><------>intel_pt_log("TSC frequency %"PRIu64"\n", tsc_freq);
<------><------>intel_pt_log("Maximum non-turbo ratio %u\n",
<------><------><------>     pt->max_non_turbo_ratio);
<------><------>pt->cbr2khz = tsc_freq / pt->max_non_turbo_ratio / 1000;
<------>}
 
<------>err = intel_pt_setup_time_ranges(pt, session->itrace_synth_opts);
<------>if (err)
<------><------>goto err_delete_thread;
 
<------>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 || pt->synth_opts.add_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;
<------><------><------>pt->synth_opts.add_callchain = false;
<------><------>}
<------>}
 
<------>if (pt->synth_opts.add_callchain) {
<------><------>err = intel_pt_callchain_init(pt);
<------><------>if (err)
<------><------><------>goto err_delete_thread;
<------>}
 
<------>if (pt->synth_opts.last_branch || pt->synth_opts.add_last_branch) {
<------><------>pt->br_stack_sz = pt->synth_opts.last_branch_sz;
<------><------>pt->br_stack_sz_plus = pt->br_stack_sz;
<------>}
 
<------>if (pt->synth_opts.add_last_branch) {
<------><------>err = intel_pt_br_stack_init(pt);
<------><------>if (err)
<------><------><------>goto err_delete_thread;
<------><------>/*
<------><------> * Additional branch stack size to cater for tracing from the
<------><------> * actual sample ip to where the sample time is recorded.
<------><------> * Measured at about 200 branches, but generously set to 1024.
<------><------> * If kernel space is not being traced, then add just 1 for the
<------><------> * branch to kernel space.
<------><------> */
<------><------>if (intel_pt_tracing_kernel(pt))
<------><------><------>pt->br_stack_sz_plus += 1024;
<------><------>else
<------><------><------>pt->br_stack_sz_plus += 1;
<------>}
 
<------>pt->use_thread_stack = pt->synth_opts.callchain ||
<------><------><------>       pt->synth_opts.add_callchain ||
<------><------><------>       pt->synth_opts.thread_stack ||
<------><------><------>       pt->synth_opts.last_branch ||
<------><------><------>       pt->synth_opts.add_last_branch;
 
<------>pt->callstack = pt->synth_opts.callchain ||
<------><------><------>pt->synth_opts.add_callchain ||
<------><------><------>pt->synth_opts.thread_stack;
 
<------>err = intel_pt_synth_events(pt, session);
<------>if (err)
<------><------>goto err_delete_thread;
 
<------>intel_pt_setup_pebs_events(pt);
 
<------>if (pt->sampling_mode || list_empty(&session->auxtrace_index))
<------><------>err = auxtrace_queue_data(session, true, true);
<------>else
<------><------>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:
<------>zfree(&pt->chain);
<------>thread__zput(pt->unknown_thread);
err_free_queues:
<------>intel_pt_log_disable();
<------>auxtrace_queues__free(&pt->queues);
<------>session->auxtrace = NULL;
err_free:
<------>addr_filters__exit(&pt->filts);
<------>zfree(&pt->filter);
<------>zfree(&pt->time_ranges);
<------>free(pt);
<------>return err;
}