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/*
* SPDX-License-Identifier: GPL-2.0
*
* Copyright(C) 2015-2018 Linaro Limited.
*
* Author: Tor Jeremiassen <tor@ti.com>
* Author: Mathieu Poirier <mathieu.poirier@linaro.org>
*/
#include <linux/bitops.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/log2.h>
#include <linux/types.h>
#include <stdlib.h>
#include "auxtrace.h"
#include "color.h"
#include "cs-etm.h"
#include "debug.h"
#include "evlist.h"
#include "intlist.h"
#include "machine.h"
#include "map.h"
#include "perf.h"
#include "thread.h"
#include "thread_map.h"
#include "thread-stack.h"
#include "util.h"
#define MAX_TIMESTAMP (~0ULL)
struct cs_etm_auxtrace {
struct auxtrace auxtrace;
struct auxtrace_queues queues;
struct auxtrace_heap heap;
struct itrace_synth_opts synth_opts;
struct perf_session *session;
struct machine *machine;
struct thread *unknown_thread;
u8 timeless_decoding;
u8 snapshot_mode;
u8 data_queued;
u8 sample_branches;
int num_cpu;
u32 auxtrace_type;
u64 branches_sample_type;
u64 branches_id;
u64 **metadata;
u64 kernel_start;
unsigned int pmu_type;
};
struct cs_etm_queue {
struct cs_etm_auxtrace *etm;
struct thread *thread;
struct cs_etm_decoder *decoder;
struct auxtrace_buffer *buffer;
const struct cs_etm_state *state;
union perf_event *event_buf;
unsigned int queue_nr;
pid_t pid, tid;
int cpu;
u64 time;
u64 timestamp;
u64 offset;
};
static int cs_etm__flush_events(struct perf_session *session,
struct perf_tool *tool)
{
(void) session;
(void) tool;
return 0;
}
static void cs_etm__free_queue(void *priv)
{
struct cs_etm_queue *etmq = priv;
free(etmq);
}
static void cs_etm__free_events(struct perf_session *session)
{
unsigned int i;
struct cs_etm_auxtrace *aux = container_of(session->auxtrace,
struct cs_etm_auxtrace,
auxtrace);
struct auxtrace_queues *queues = &aux->queues;
for (i = 0; i < queues->nr_queues; i++) {
cs_etm__free_queue(queues->queue_array[i].priv);
queues->queue_array[i].priv = NULL;
}
auxtrace_queues__free(queues);
}
static void cs_etm__free(struct perf_session *session)
{
int i;
struct int_node *inode, *tmp;
struct cs_etm_auxtrace *aux = container_of(session->auxtrace,
struct cs_etm_auxtrace,
auxtrace);
cs_etm__free_events(session);
session->auxtrace = NULL;
/* First remove all traceID/CPU# nodes for the RB tree */
intlist__for_each_entry_safe(inode, tmp, traceid_list)
intlist__remove(traceid_list, inode);
/* Then the RB tree itself */
intlist__delete(traceid_list);
for (i = 0; i < aux->num_cpu; i++)
zfree(&aux->metadata[i]);
zfree(&aux->metadata);
zfree(&aux);
}
static int cs_etm__process_event(struct perf_session *session,
union perf_event *event,
struct perf_sample *sample,
struct perf_tool *tool)
{
(void) session;
(void) event;
(void) sample;
(void) tool;
return 0;
}
static int cs_etm__process_auxtrace_event(struct perf_session *session,
union perf_event *event,
struct perf_tool *tool)
{
(void) session;
(void) event;
(void) tool;
return 0;
}
static bool cs_etm__is_timeless_decoding(struct cs_etm_auxtrace *etm)
{
struct perf_evsel *evsel;
struct perf_evlist *evlist = etm->session->evlist;
bool timeless_decoding = true;
/*
* Circle through the list of event and complain if we find one
* with the time bit set.
*/
evlist__for_each_entry(evlist, evsel) {
if ((evsel->attr.sample_type & PERF_SAMPLE_TIME))
timeless_decoding = false;
}
return timeless_decoding;
}
static const char * const cs_etm_global_header_fmts[] = {
[CS_HEADER_VERSION_0] = " Header version %llx\n",
[CS_PMU_TYPE_CPUS] = " PMU type/num cpus %llx\n",
[CS_ETM_SNAPSHOT] = " Snapshot %llx\n",
};
static const char * const cs_etm_priv_fmts[] = {
[CS_ETM_MAGIC] = " Magic number %llx\n",
[CS_ETM_CPU] = " CPU %lld\n",
[CS_ETM_ETMCR] = " ETMCR %llx\n",
[CS_ETM_ETMTRACEIDR] = " ETMTRACEIDR %llx\n",
[CS_ETM_ETMCCER] = " ETMCCER %llx\n",
[CS_ETM_ETMIDR] = " ETMIDR %llx\n",
};
static const char * const cs_etmv4_priv_fmts[] = {
[CS_ETM_MAGIC] = " Magic number %llx\n",
[CS_ETM_CPU] = " CPU %lld\n",
[CS_ETMV4_TRCCONFIGR] = " TRCCONFIGR %llx\n",
[CS_ETMV4_TRCTRACEIDR] = " TRCTRACEIDR %llx\n",
[CS_ETMV4_TRCIDR0] = " TRCIDR0 %llx\n",
[CS_ETMV4_TRCIDR1] = " TRCIDR1 %llx\n",
[CS_ETMV4_TRCIDR2] = " TRCIDR2 %llx\n",
[CS_ETMV4_TRCIDR8] = " TRCIDR8 %llx\n",
[CS_ETMV4_TRCAUTHSTATUS] = " TRCAUTHSTATUS %llx\n",
};
static void cs_etm__print_auxtrace_info(u64 *val, int num)
{
int i, j, cpu = 0;
for (i = 0; i < CS_HEADER_VERSION_0_MAX; i++)
fprintf(stdout, cs_etm_global_header_fmts[i], val[i]);
for (i = CS_HEADER_VERSION_0_MAX; cpu < num; cpu++) {
if (val[i] == __perf_cs_etmv3_magic)
for (j = 0; j < CS_ETM_PRIV_MAX; j++, i++)
fprintf(stdout, cs_etm_priv_fmts[j], val[i]);
else if (val[i] == __perf_cs_etmv4_magic)
for (j = 0; j < CS_ETMV4_PRIV_MAX; j++, i++)
fprintf(stdout, cs_etmv4_priv_fmts[j], val[i]);
else
/* failure.. return */
return;
}
}
int cs_etm__process_auxtrace_info(union perf_event *event,
struct perf_session *session)
{
struct auxtrace_info_event *auxtrace_info = &event->auxtrace_info;
struct cs_etm_auxtrace *etm = NULL;
struct int_node *inode;
unsigned int pmu_type;
int event_header_size = sizeof(struct perf_event_header);
int info_header_size;
int total_size = auxtrace_info->header.size;
int priv_size = 0;
int num_cpu;
int err = 0, idx = -1;
int i, j, k;
u64 *ptr, *hdr = NULL;
u64 **metadata = NULL;
/*
* sizeof(auxtrace_info_event::type) +
* sizeof(auxtrace_info_event::reserved) == 8
*/
info_header_size = 8;
if (total_size < (event_header_size + info_header_size))
return -EINVAL;
priv_size = total_size - event_header_size - info_header_size;
/* First the global part */
ptr = (u64 *) auxtrace_info->priv;
/* Look for version '0' of the header */
if (ptr[0] != 0)
return -EINVAL;
hdr = zalloc(sizeof(*hdr) * CS_HEADER_VERSION_0_MAX);
if (!hdr)
return -ENOMEM;
/* Extract header information - see cs-etm.h for format */
for (i = 0; i < CS_HEADER_VERSION_0_MAX; i++)
hdr[i] = ptr[i];
num_cpu = hdr[CS_PMU_TYPE_CPUS] & 0xffffffff;
pmu_type = (unsigned int) ((hdr[CS_PMU_TYPE_CPUS] >> 32) &
0xffffffff);
/*
* Create an RB tree for traceID-CPU# tuple. Since the conversion has
* to be made for each packet that gets decoded, optimizing access in
* anything other than a sequential array is worth doing.
*/
traceid_list = intlist__new(NULL);
if (!traceid_list) {
err = -ENOMEM;
goto err_free_hdr;
}
metadata = zalloc(sizeof(*metadata) * num_cpu);
if (!metadata) {
err = -ENOMEM;
goto err_free_traceid_list;
}
/*
* The metadata is stored in the auxtrace_info section and encodes
* the configuration of the ARM embedded trace macrocell which is
* required by the trace decoder to properly decode the trace due
* to its highly compressed nature.
*/
for (j = 0; j < num_cpu; j++) {
if (ptr[i] == __perf_cs_etmv3_magic) {
metadata[j] = zalloc(sizeof(*metadata[j]) *
CS_ETM_PRIV_MAX);
if (!metadata[j]) {
err = -ENOMEM;
goto err_free_metadata;
}
for (k = 0; k < CS_ETM_PRIV_MAX; k++)
metadata[j][k] = ptr[i + k];
/* The traceID is our handle */
idx = metadata[j][CS_ETM_ETMTRACEIDR];
i += CS_ETM_PRIV_MAX;
} else if (ptr[i] == __perf_cs_etmv4_magic) {
metadata[j] = zalloc(sizeof(*metadata[j]) *
CS_ETMV4_PRIV_MAX);
if (!metadata[j]) {
err = -ENOMEM;
goto err_free_metadata;
}
for (k = 0; k < CS_ETMV4_PRIV_MAX; k++)
metadata[j][k] = ptr[i + k];
/* The traceID is our handle */
idx = metadata[j][CS_ETMV4_TRCTRACEIDR];
i += CS_ETMV4_PRIV_MAX;
}
/* Get an RB node for this CPU */
inode = intlist__findnew(traceid_list, idx);
/* Something went wrong, no need to continue */
if (!inode) {
err = PTR_ERR(inode);
goto err_free_metadata;
}
/*
* The node for that CPU should not be taken.
* Back out if that's the case.
*/
if (inode->priv) {
err = -EINVAL;
goto err_free_metadata;
}
/* All good, associate the traceID with the CPU# */
inode->priv = &metadata[j][CS_ETM_CPU];
}
/*
* Each of CS_HEADER_VERSION_0_MAX, CS_ETM_PRIV_MAX and
* CS_ETMV4_PRIV_MAX mark how many double words are in the
* global metadata, and each cpu's metadata respectively.
* The following tests if the correct number of double words was
* present in the auxtrace info section.
*/
if (i * 8 != priv_size) {
err = -EINVAL;
goto err_free_metadata;
}
etm = zalloc(sizeof(*etm));
if (!etm) {
err = -ENOMEM;
goto err_free_metadata;
}
err = auxtrace_queues__init(&etm->queues);
if (err)
goto err_free_etm;
etm->session = session;
etm->machine = &session->machines.host;
etm->num_cpu = num_cpu;
etm->pmu_type = pmu_type;
etm->snapshot_mode = (hdr[CS_ETM_SNAPSHOT] != 0);
etm->metadata = metadata;
etm->auxtrace_type = auxtrace_info->type;
etm->timeless_decoding = cs_etm__is_timeless_decoding(etm);
etm->auxtrace.process_event = cs_etm__process_event;
etm->auxtrace.process_auxtrace_event = cs_etm__process_auxtrace_event;
etm->auxtrace.flush_events = cs_etm__flush_events;
etm->auxtrace.free_events = cs_etm__free_events;
etm->auxtrace.free = cs_etm__free;
session->auxtrace = &etm->auxtrace;
if (dump_trace) {
cs_etm__print_auxtrace_info(auxtrace_info->priv, num_cpu);
return 0;
}
err = auxtrace_queues__process_index(&etm->queues, session);
if (err)
goto err_free_queues;
etm->data_queued = etm->queues.populated;
return 0;
err_free_queues:
auxtrace_queues__free(&etm->queues);
session->auxtrace = NULL;
err_free_etm:
zfree(&etm);
err_free_metadata:
/* No need to check @metadata[j], free(NULL) is supported */
for (j = 0; j < num_cpu; j++)
free(metadata[j]);
zfree(&metadata);
err_free_traceid_list:
intlist__delete(traceid_list);
err_free_hdr:
zfree(&hdr);
return -EINVAL;
}
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