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// SPDX-License-Identifier: GPL-2.0
/*
* File for any parts of the Coresight decoding that don't require
* OpenCSD.
*/
#include <errno.h>
#include <inttypes.h>
#include "cs-etm.h"
static const char * const cs_etm_global_header_fmts[] = {
[CS_HEADER_VERSION] = " 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_NR_TRC_PARAMS] = " NR_TRC_PARAMS %llx\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_ETM_NR_TRC_PARAMS] = " NR_TRC_PARAMS %llx\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",
[CS_ETE_TRCDEVARCH] = " TRCDEVARCH %llx\n"
};
static const char * const param_unk_fmt =
" Unknown parameter [%d] %"PRIx64"\n";
static const char * const magic_unk_fmt =
" Magic number Unknown %"PRIx64"\n";
static int cs_etm__print_cpu_metadata_v0(u64 *val, int *offset)
{
int i = *offset, j, nr_params = 0, fmt_offset;
u64 magic;
/* check magic value */
magic = val[i + CS_ETM_MAGIC];
if ((magic != __perf_cs_etmv3_magic) &&
(magic != __perf_cs_etmv4_magic)) {
/* failure - note bad magic value */
fprintf(stdout, magic_unk_fmt, magic);
return -EINVAL;
}
/* print common header block */
fprintf(stdout, cs_etm_priv_fmts[CS_ETM_MAGIC], val[i++]);
fprintf(stdout, cs_etm_priv_fmts[CS_ETM_CPU], val[i++]);
if (magic == __perf_cs_etmv3_magic) {
nr_params = CS_ETM_NR_TRC_PARAMS_V0;
fmt_offset = CS_ETM_ETMCR;
/* after common block, offset format index past NR_PARAMS */
for (j = fmt_offset; j < nr_params + fmt_offset; j++, i++)
fprintf(stdout, cs_etm_priv_fmts[j], val[i]);
} else if (magic == __perf_cs_etmv4_magic) {
nr_params = CS_ETMV4_NR_TRC_PARAMS_V0;
fmt_offset = CS_ETMV4_TRCCONFIGR;
/* after common block, offset format index past NR_PARAMS */
for (j = fmt_offset; j < nr_params + fmt_offset; j++, i++)
fprintf(stdout, cs_etmv4_priv_fmts[j], val[i]);
}
*offset = i;
return 0;
}
static int cs_etm__print_cpu_metadata_v1(u64 *val, int *offset)
{
int i = *offset, j, total_params = 0;
u64 magic;
magic = val[i + CS_ETM_MAGIC];
/* total params to print is NR_PARAMS + common block size for v1 */
total_params = val[i + CS_ETM_NR_TRC_PARAMS] + CS_ETM_COMMON_BLK_MAX_V1;
if (magic == __perf_cs_etmv3_magic) {
for (j = 0; j < total_params; j++, i++) {
/* if newer record - could be excess params */
if (j >= CS_ETM_PRIV_MAX)
fprintf(stdout, param_unk_fmt, j, val[i]);
else
fprintf(stdout, cs_etm_priv_fmts[j], val[i]);
}
} else if (magic == __perf_cs_etmv4_magic || magic == __perf_cs_ete_magic) {
/*
* ETE and ETMv4 can be printed in the same block because the number of parameters
* is saved and they share the list of parameter names. ETE is also only supported
* in V1 files.
*/
for (j = 0; j < total_params; j++, i++) {
/* if newer record - could be excess params */
if (j >= CS_ETE_PRIV_MAX)
fprintf(stdout, param_unk_fmt, j, val[i]);
else
fprintf(stdout, cs_etmv4_priv_fmts[j], val[i]);
}
} else {
/* failure - note bad magic value and error out */
fprintf(stdout, magic_unk_fmt, magic);
return -EINVAL;
}
*offset = i;
return 0;
}
static void cs_etm__print_auxtrace_info(u64 *val, int num)
{
int i, cpu = 0, version, err;
version = val[0];
for (i = 0; i < CS_HEADER_VERSION_MAX; i++)
fprintf(stdout, cs_etm_global_header_fmts[i], val[i]);
for (i = CS_HEADER_VERSION_MAX; cpu < num; cpu++) {
if (version == 0)
err = cs_etm__print_cpu_metadata_v0(val, &i);
else if (version == 1)
err = cs_etm__print_cpu_metadata_v1(val, &i);
if (err)
return;
}
}
/*
* Do some basic checks and print the auxtrace info header before calling
* into cs_etm__process_auxtrace_info_full() which requires OpenCSD to be
* linked in. This allows some basic debugging if OpenCSD is missing.
*/
int cs_etm__process_auxtrace_info(union perf_event *event,
struct perf_session *session)
{
struct perf_record_auxtrace_info *auxtrace_info = &event->auxtrace_info;
int event_header_size = sizeof(struct perf_event_header);
int num_cpu;
u64 *ptr = NULL;
u64 hdr_version;
if (auxtrace_info->header.size < (event_header_size + INFO_HEADER_SIZE))
return -EINVAL;
/* First the global part */
ptr = (u64 *) auxtrace_info->priv;
/* Look for version of the header */
hdr_version = ptr[0];
if (hdr_version > CS_HEADER_CURRENT_VERSION) {
pr_err("\nCS ETM Trace: Unknown Header Version = %#" PRIx64, hdr_version);
pr_err(", version supported <= %x\n", CS_HEADER_CURRENT_VERSION);
return -EINVAL;
}
if (dump_trace) {
num_cpu = ptr[CS_PMU_TYPE_CPUS] & 0xffffffff;
cs_etm__print_auxtrace_info(ptr, num_cpu);
}
return cs_etm__process_auxtrace_info_full(event, session);
}
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