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-rw-r--r--tools/perf/util/cs-etm-base.c193
1 files changed, 193 insertions, 0 deletions
diff --git a/tools/perf/util/cs-etm-base.c b/tools/perf/util/cs-etm-base.c
new file mode 100644
index 0000000000..4abe416e3f
--- /dev/null
+++ b/tools/perf/util/cs-etm-base.c
@@ -0,0 +1,193 @@
+// 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_ETMV4_TS_SOURCE] = " TS_SOURCE %lld\n",
+};
+
+static const char * const cs_ete_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_ETE_TRCCONFIGR] = " TRCCONFIGR %llx\n",
+ [CS_ETE_TRCTRACEIDR] = " TRCTRACEIDR %llx\n",
+ [CS_ETE_TRCIDR0] = " TRCIDR0 %llx\n",
+ [CS_ETE_TRCIDR1] = " TRCIDR1 %llx\n",
+ [CS_ETE_TRCIDR2] = " TRCIDR2 %llx\n",
+ [CS_ETE_TRCIDR8] = " TRCIDR8 %llx\n",
+ [CS_ETE_TRCAUTHSTATUS] = " TRCAUTHSTATUS %llx\n",
+ [CS_ETE_TRCDEVARCH] = " TRCDEVARCH %llx\n",
+ [CS_ETE_TS_SOURCE] = " TS_SOURCE %lld\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) {
+ for (j = 0; j < total_params; j++, i++) {
+ /* if newer record - could be excess params */
+ if (j >= CS_ETMV4_PRIV_MAX)
+ fprintf(stdout, param_unk_fmt, j, val[i]);
+ else
+ fprintf(stdout, cs_etmv4_priv_fmts[j], val[i]);
+ }
+ } else if (magic == __perf_cs_ete_magic) {
+ 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_ete_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);
+ /* printing same for both, but value bit flags added on v2 */
+ else if ((version == 1) || (version == 2))
+ 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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