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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /tools/perf/util/cs-etm-decoder
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/perf/util/cs-etm-decoder')
-rw-r--r--tools/perf/util/cs-etm-decoder/Build1
-rw-r--r--tools/perf/util/cs-etm-decoder/cs-etm-decoder.c837
-rw-r--r--tools/perf/util/cs-etm-decoder/cs-etm-decoder.h111
3 files changed, 949 insertions, 0 deletions
diff --git a/tools/perf/util/cs-etm-decoder/Build b/tools/perf/util/cs-etm-decoder/Build
new file mode 100644
index 0000000000..216cb17a33
--- /dev/null
+++ b/tools/perf/util/cs-etm-decoder/Build
@@ -0,0 +1 @@
+perf-$(CONFIG_AUXTRACE) += cs-etm-decoder.o
diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
new file mode 100644
index 0000000000..e917985bbb
--- /dev/null
+++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
@@ -0,0 +1,837 @@
+// 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 <asm/bug.h>
+#include <linux/coresight-pmu.h>
+#include <linux/err.h>
+#include <linux/list.h>
+#include <linux/zalloc.h>
+#include <stdlib.h>
+#include <opencsd/c_api/opencsd_c_api.h>
+
+#include "cs-etm.h"
+#include "cs-etm-decoder.h"
+#include "debug.h"
+#include "intlist.h"
+
+/* use raw logging */
+#ifdef CS_DEBUG_RAW
+#define CS_LOG_RAW_FRAMES
+#ifdef CS_RAW_PACKED
+#define CS_RAW_DEBUG_FLAGS (OCSD_DFRMTR_UNPACKED_RAW_OUT | \
+ OCSD_DFRMTR_PACKED_RAW_OUT)
+#else
+#define CS_RAW_DEBUG_FLAGS (OCSD_DFRMTR_UNPACKED_RAW_OUT)
+#endif
+#endif
+
+/*
+ * Assume a maximum of 0.1ns elapsed per instruction. This would be the
+ * case with a theoretical 10GHz core executing 1 instruction per cycle.
+ * Used to estimate the sample time for synthesized instructions because
+ * Coresight only emits a timestamp for a range of instructions rather
+ * than per instruction.
+ */
+const u32 INSTR_PER_NS = 10;
+
+struct cs_etm_decoder {
+ void *data;
+ void (*packet_printer)(const char *msg);
+ bool suppress_printing;
+ dcd_tree_handle_t dcd_tree;
+ cs_etm_mem_cb_type mem_access;
+ ocsd_datapath_resp_t prev_return;
+ const char *decoder_name;
+};
+
+static u32
+cs_etm_decoder__mem_access(const void *context,
+ const ocsd_vaddr_t address,
+ const ocsd_mem_space_acc_t mem_space,
+ const u8 trace_chan_id,
+ const u32 req_size,
+ u8 *buffer)
+{
+ struct cs_etm_decoder *decoder = (struct cs_etm_decoder *) context;
+
+ return decoder->mem_access(decoder->data, trace_chan_id, address,
+ req_size, buffer, mem_space);
+}
+
+int cs_etm_decoder__add_mem_access_cb(struct cs_etm_decoder *decoder,
+ u64 start, u64 end,
+ cs_etm_mem_cb_type cb_func)
+{
+ decoder->mem_access = cb_func;
+
+ if (ocsd_dt_add_callback_trcid_mem_acc(decoder->dcd_tree, start, end,
+ OCSD_MEM_SPACE_ANY,
+ cs_etm_decoder__mem_access,
+ decoder))
+ return -1;
+
+ return 0;
+}
+
+int cs_etm_decoder__reset(struct cs_etm_decoder *decoder)
+{
+ ocsd_datapath_resp_t dp_ret;
+
+ decoder->prev_return = OCSD_RESP_CONT;
+ decoder->suppress_printing = true;
+ dp_ret = ocsd_dt_process_data(decoder->dcd_tree, OCSD_OP_RESET,
+ 0, 0, NULL, NULL);
+ decoder->suppress_printing = false;
+ if (OCSD_DATA_RESP_IS_FATAL(dp_ret))
+ return -1;
+
+ return 0;
+}
+
+int cs_etm_decoder__get_packet(struct cs_etm_packet_queue *packet_queue,
+ struct cs_etm_packet *packet)
+{
+ if (!packet_queue || !packet)
+ return -EINVAL;
+
+ /* Nothing to do, might as well just return */
+ if (packet_queue->packet_count == 0)
+ return 0;
+ /*
+ * The queueing process in function cs_etm_decoder__buffer_packet()
+ * increments the tail *before* using it. This is somewhat counter
+ * intuitive but it has the advantage of centralizing tail management
+ * at a single location. Because of that we need to follow the same
+ * heuristic with the head, i.e we increment it before using its
+ * value. Otherwise the first element of the packet queue is not
+ * used.
+ */
+ packet_queue->head = (packet_queue->head + 1) &
+ (CS_ETM_PACKET_MAX_BUFFER - 1);
+
+ *packet = packet_queue->packet_buffer[packet_queue->head];
+
+ packet_queue->packet_count--;
+
+ return 1;
+}
+
+/*
+ * Calculate the number of nanoseconds elapsed.
+ *
+ * instr_count is updated in place with the remainder of the instructions
+ * which didn't make up a whole nanosecond.
+ */
+static u32 cs_etm_decoder__dec_instr_count_to_ns(u32 *instr_count)
+{
+ const u32 instr_copy = *instr_count;
+
+ *instr_count %= INSTR_PER_NS;
+ return instr_copy / INSTR_PER_NS;
+}
+
+static int cs_etm_decoder__gen_etmv3_config(struct cs_etm_trace_params *params,
+ ocsd_etmv3_cfg *config)
+{
+ config->reg_idr = params->etmv3.reg_idr;
+ config->reg_ctrl = params->etmv3.reg_ctrl;
+ config->reg_ccer = params->etmv3.reg_ccer;
+ config->reg_trc_id = params->etmv3.reg_trc_id;
+ config->arch_ver = ARCH_V7;
+ config->core_prof = profile_CortexA;
+
+ return 0;
+}
+
+#define TRCIDR1_TRCARCHMIN_SHIFT 4
+#define TRCIDR1_TRCARCHMIN_MASK GENMASK(7, 4)
+#define TRCIDR1_TRCARCHMIN(x) (((x) & TRCIDR1_TRCARCHMIN_MASK) >> TRCIDR1_TRCARCHMIN_SHIFT)
+
+static enum _ocsd_arch_version cs_etm_decoder__get_etmv4_arch_ver(u32 reg_idr1)
+{
+ /*
+ * For ETMv4 if the trace minor version is 4 or more then we can assume
+ * the architecture is ARCH_AA64 rather than just V8.
+ * ARCH_V8 = V8 architecture
+ * ARCH_AA64 = Min v8r3 plus additional AA64 PE features
+ */
+ return TRCIDR1_TRCARCHMIN(reg_idr1) >= 4 ? ARCH_AA64 : ARCH_V8;
+}
+
+static void cs_etm_decoder__gen_etmv4_config(struct cs_etm_trace_params *params,
+ ocsd_etmv4_cfg *config)
+{
+ config->reg_configr = params->etmv4.reg_configr;
+ config->reg_traceidr = params->etmv4.reg_traceidr;
+ config->reg_idr0 = params->etmv4.reg_idr0;
+ config->reg_idr1 = params->etmv4.reg_idr1;
+ config->reg_idr2 = params->etmv4.reg_idr2;
+ config->reg_idr8 = params->etmv4.reg_idr8;
+ config->reg_idr9 = 0;
+ config->reg_idr10 = 0;
+ config->reg_idr11 = 0;
+ config->reg_idr12 = 0;
+ config->reg_idr13 = 0;
+ config->arch_ver = cs_etm_decoder__get_etmv4_arch_ver(params->etmv4.reg_idr1);
+ config->core_prof = profile_CortexA;
+}
+
+static void cs_etm_decoder__gen_ete_config(struct cs_etm_trace_params *params,
+ ocsd_ete_cfg *config)
+{
+ config->reg_configr = params->ete.reg_configr;
+ config->reg_traceidr = params->ete.reg_traceidr;
+ config->reg_idr0 = params->ete.reg_idr0;
+ config->reg_idr1 = params->ete.reg_idr1;
+ config->reg_idr2 = params->ete.reg_idr2;
+ config->reg_idr8 = params->ete.reg_idr8;
+ config->reg_devarch = params->ete.reg_devarch;
+ config->arch_ver = ARCH_AA64;
+ config->core_prof = profile_CortexA;
+}
+
+static void cs_etm_decoder__print_str_cb(const void *p_context,
+ const char *msg,
+ const int str_len)
+{
+ const struct cs_etm_decoder *decoder = p_context;
+
+ if (p_context && str_len && !decoder->suppress_printing)
+ decoder->packet_printer(msg);
+}
+
+static int
+cs_etm_decoder__init_def_logger_printing(struct cs_etm_decoder_params *d_params,
+ struct cs_etm_decoder *decoder)
+{
+ int ret = 0;
+
+ if (d_params->packet_printer == NULL)
+ return -1;
+
+ decoder->packet_printer = d_params->packet_printer;
+
+ /*
+ * Set up a library default logger to process any printers
+ * (packet/raw frame) we add later.
+ */
+ ret = ocsd_def_errlog_init(OCSD_ERR_SEV_ERROR, 1);
+ if (ret != 0)
+ return -1;
+
+ /* no stdout / err / file output */
+ ret = ocsd_def_errlog_config_output(C_API_MSGLOGOUT_FLG_NONE, NULL);
+ if (ret != 0)
+ return -1;
+
+ /*
+ * Set the string CB for the default logger, passes strings to
+ * perf print logger.
+ */
+ ret = ocsd_def_errlog_set_strprint_cb(decoder->dcd_tree,
+ (void *)decoder,
+ cs_etm_decoder__print_str_cb);
+ if (ret != 0)
+ ret = -1;
+
+ return 0;
+}
+
+#ifdef CS_LOG_RAW_FRAMES
+static void
+cs_etm_decoder__init_raw_frame_logging(struct cs_etm_decoder_params *d_params,
+ struct cs_etm_decoder *decoder)
+{
+ /* Only log these during a --dump operation */
+ if (d_params->operation == CS_ETM_OPERATION_PRINT) {
+ /* set up a library default logger to process the
+ * raw frame printer we add later
+ */
+ ocsd_def_errlog_init(OCSD_ERR_SEV_ERROR, 1);
+
+ /* no stdout / err / file output */
+ ocsd_def_errlog_config_output(C_API_MSGLOGOUT_FLG_NONE, NULL);
+
+ /* set the string CB for the default logger,
+ * passes strings to perf print logger.
+ */
+ ocsd_def_errlog_set_strprint_cb(decoder->dcd_tree,
+ (void *)decoder,
+ cs_etm_decoder__print_str_cb);
+
+ /* use the built in library printer for the raw frames */
+ ocsd_dt_set_raw_frame_printer(decoder->dcd_tree,
+ CS_RAW_DEBUG_FLAGS);
+ }
+}
+#else
+static void
+cs_etm_decoder__init_raw_frame_logging(
+ struct cs_etm_decoder_params *d_params __maybe_unused,
+ struct cs_etm_decoder *decoder __maybe_unused)
+{
+}
+#endif
+
+static ocsd_datapath_resp_t
+cs_etm_decoder__do_soft_timestamp(struct cs_etm_queue *etmq,
+ struct cs_etm_packet_queue *packet_queue,
+ const uint8_t trace_chan_id)
+{
+ u64 estimated_ts;
+
+ /* No timestamp packet has been received, nothing to do */
+ if (!packet_queue->next_cs_timestamp)
+ return OCSD_RESP_CONT;
+
+ estimated_ts = packet_queue->cs_timestamp +
+ cs_etm_decoder__dec_instr_count_to_ns(&packet_queue->instr_count);
+
+ /* Estimated TS can never be higher than the next real one in the trace */
+ packet_queue->cs_timestamp = min(packet_queue->next_cs_timestamp, estimated_ts);
+
+ /* Tell the front end which traceid_queue needs attention */
+ cs_etm__etmq_set_traceid_queue_timestamp(etmq, trace_chan_id);
+
+ return OCSD_RESP_WAIT;
+}
+
+static ocsd_datapath_resp_t
+cs_etm_decoder__do_hard_timestamp(struct cs_etm_queue *etmq,
+ const ocsd_generic_trace_elem *elem,
+ const uint8_t trace_chan_id,
+ const ocsd_trc_index_t indx)
+{
+ struct cs_etm_packet_queue *packet_queue;
+ u64 converted_timestamp;
+ u64 estimated_first_ts;
+
+ /* First get the packet queue for this traceID */
+ packet_queue = cs_etm__etmq_get_packet_queue(etmq, trace_chan_id);
+ if (!packet_queue)
+ return OCSD_RESP_FATAL_SYS_ERR;
+
+ /*
+ * Coresight timestamps are raw timer values which need to be scaled to ns. Assume
+ * 0 is a bad value so don't try to convert it.
+ */
+ converted_timestamp = elem->timestamp ?
+ cs_etm__convert_sample_time(etmq, elem->timestamp) : 0;
+
+ /*
+ * We've seen a timestamp packet before - simply record the new value.
+ * Function do_soft_timestamp() will report the value to the front end,
+ * hence asking the decoder to keep decoding rather than stopping.
+ */
+ if (packet_queue->next_cs_timestamp) {
+ /*
+ * What was next is now where new ranges start from, overwriting
+ * any previous estimate in cs_timestamp
+ */
+ packet_queue->cs_timestamp = packet_queue->next_cs_timestamp;
+ packet_queue->next_cs_timestamp = converted_timestamp;
+ return OCSD_RESP_CONT;
+ }
+
+ if (!converted_timestamp) {
+ /*
+ * Zero timestamps can be seen due to misconfiguration or hardware bugs.
+ * Warn once, and don't try to subtract instr_count as it would result in an
+ * underflow.
+ */
+ packet_queue->cs_timestamp = 0;
+ if (!cs_etm__etmq_is_timeless(etmq))
+ pr_warning_once("Zero Coresight timestamp found at Idx:%" OCSD_TRC_IDX_STR
+ ". Decoding may be improved by prepending 'Z' to your current --itrace arguments.\n",
+ indx);
+
+ } else if (packet_queue->instr_count / INSTR_PER_NS > converted_timestamp) {
+ /*
+ * Sanity check that the elem->timestamp - packet_queue->instr_count would not
+ * result in an underflow. Warn and clamp at 0 if it would.
+ */
+ packet_queue->cs_timestamp = 0;
+ pr_err("Timestamp calculation underflow at Idx:%" OCSD_TRC_IDX_STR "\n", indx);
+ } else {
+ /*
+ * This is the first timestamp we've seen since the beginning of traces
+ * or a discontinuity. Since timestamps packets are generated *after*
+ * range packets have been generated, we need to estimate the time at
+ * which instructions started by subtracting the number of instructions
+ * executed to the timestamp. Don't estimate earlier than the last used
+ * timestamp though.
+ */
+ estimated_first_ts = converted_timestamp -
+ (packet_queue->instr_count / INSTR_PER_NS);
+ packet_queue->cs_timestamp = max(packet_queue->cs_timestamp, estimated_first_ts);
+ }
+ packet_queue->next_cs_timestamp = converted_timestamp;
+ packet_queue->instr_count = 0;
+
+ /* Tell the front end which traceid_queue needs attention */
+ cs_etm__etmq_set_traceid_queue_timestamp(etmq, trace_chan_id);
+
+ /* Halt processing until we are being told to proceed */
+ return OCSD_RESP_WAIT;
+}
+
+static void
+cs_etm_decoder__reset_timestamp(struct cs_etm_packet_queue *packet_queue)
+{
+ packet_queue->next_cs_timestamp = 0;
+ packet_queue->instr_count = 0;
+}
+
+static ocsd_datapath_resp_t
+cs_etm_decoder__buffer_packet(struct cs_etm_packet_queue *packet_queue,
+ const u8 trace_chan_id,
+ enum cs_etm_sample_type sample_type)
+{
+ u32 et = 0;
+ int cpu;
+
+ if (packet_queue->packet_count >= CS_ETM_PACKET_MAX_BUFFER - 1)
+ return OCSD_RESP_FATAL_SYS_ERR;
+
+ if (cs_etm__get_cpu(trace_chan_id, &cpu) < 0)
+ return OCSD_RESP_FATAL_SYS_ERR;
+
+ et = packet_queue->tail;
+ et = (et + 1) & (CS_ETM_PACKET_MAX_BUFFER - 1);
+ packet_queue->tail = et;
+ packet_queue->packet_count++;
+
+ packet_queue->packet_buffer[et].sample_type = sample_type;
+ packet_queue->packet_buffer[et].isa = CS_ETM_ISA_UNKNOWN;
+ packet_queue->packet_buffer[et].cpu = cpu;
+ packet_queue->packet_buffer[et].start_addr = CS_ETM_INVAL_ADDR;
+ packet_queue->packet_buffer[et].end_addr = CS_ETM_INVAL_ADDR;
+ packet_queue->packet_buffer[et].instr_count = 0;
+ packet_queue->packet_buffer[et].last_instr_taken_branch = false;
+ packet_queue->packet_buffer[et].last_instr_size = 0;
+ packet_queue->packet_buffer[et].last_instr_type = 0;
+ packet_queue->packet_buffer[et].last_instr_subtype = 0;
+ packet_queue->packet_buffer[et].last_instr_cond = 0;
+ packet_queue->packet_buffer[et].flags = 0;
+ packet_queue->packet_buffer[et].exception_number = UINT32_MAX;
+ packet_queue->packet_buffer[et].trace_chan_id = trace_chan_id;
+
+ if (packet_queue->packet_count == CS_ETM_PACKET_MAX_BUFFER - 1)
+ return OCSD_RESP_WAIT;
+
+ return OCSD_RESP_CONT;
+}
+
+static ocsd_datapath_resp_t
+cs_etm_decoder__buffer_range(struct cs_etm_queue *etmq,
+ struct cs_etm_packet_queue *packet_queue,
+ const ocsd_generic_trace_elem *elem,
+ const uint8_t trace_chan_id)
+{
+ int ret = 0;
+ struct cs_etm_packet *packet;
+
+ ret = cs_etm_decoder__buffer_packet(packet_queue, trace_chan_id,
+ CS_ETM_RANGE);
+ if (ret != OCSD_RESP_CONT && ret != OCSD_RESP_WAIT)
+ return ret;
+
+ packet = &packet_queue->packet_buffer[packet_queue->tail];
+
+ switch (elem->isa) {
+ case ocsd_isa_aarch64:
+ packet->isa = CS_ETM_ISA_A64;
+ break;
+ case ocsd_isa_arm:
+ packet->isa = CS_ETM_ISA_A32;
+ break;
+ case ocsd_isa_thumb2:
+ packet->isa = CS_ETM_ISA_T32;
+ break;
+ case ocsd_isa_tee:
+ case ocsd_isa_jazelle:
+ case ocsd_isa_custom:
+ case ocsd_isa_unknown:
+ default:
+ packet->isa = CS_ETM_ISA_UNKNOWN;
+ }
+
+ packet->start_addr = elem->st_addr;
+ packet->end_addr = elem->en_addr;
+ packet->instr_count = elem->num_instr_range;
+ packet->last_instr_type = elem->last_i_type;
+ packet->last_instr_subtype = elem->last_i_subtype;
+ packet->last_instr_cond = elem->last_instr_cond;
+
+ if (elem->last_i_type == OCSD_INSTR_BR || elem->last_i_type == OCSD_INSTR_BR_INDIRECT)
+ packet->last_instr_taken_branch = elem->last_instr_exec;
+ else
+ packet->last_instr_taken_branch = false;
+
+ packet->last_instr_size = elem->last_instr_sz;
+
+ /* per-thread scenario, no need to generate a timestamp */
+ if (cs_etm__etmq_is_timeless(etmq))
+ goto out;
+
+ /*
+ * The packet queue is full and we haven't seen a timestamp (had we
+ * seen one the packet queue wouldn't be full). Let the front end
+ * deal with it.
+ */
+ if (ret == OCSD_RESP_WAIT)
+ goto out;
+
+ packet_queue->instr_count += elem->num_instr_range;
+ /* Tell the front end we have a new timestamp to process */
+ ret = cs_etm_decoder__do_soft_timestamp(etmq, packet_queue,
+ trace_chan_id);
+out:
+ return ret;
+}
+
+static ocsd_datapath_resp_t
+cs_etm_decoder__buffer_discontinuity(struct cs_etm_packet_queue *queue,
+ const uint8_t trace_chan_id)
+{
+ /*
+ * Something happened and who knows when we'll get new traces so
+ * reset time statistics.
+ */
+ cs_etm_decoder__reset_timestamp(queue);
+ return cs_etm_decoder__buffer_packet(queue, trace_chan_id,
+ CS_ETM_DISCONTINUITY);
+}
+
+static ocsd_datapath_resp_t
+cs_etm_decoder__buffer_exception(struct cs_etm_packet_queue *queue,
+ const ocsd_generic_trace_elem *elem,
+ const uint8_t trace_chan_id)
+{ int ret = 0;
+ struct cs_etm_packet *packet;
+
+ ret = cs_etm_decoder__buffer_packet(queue, trace_chan_id,
+ CS_ETM_EXCEPTION);
+ if (ret != OCSD_RESP_CONT && ret != OCSD_RESP_WAIT)
+ return ret;
+
+ packet = &queue->packet_buffer[queue->tail];
+ packet->exception_number = elem->exception_number;
+
+ return ret;
+}
+
+static ocsd_datapath_resp_t
+cs_etm_decoder__buffer_exception_ret(struct cs_etm_packet_queue *queue,
+ const uint8_t trace_chan_id)
+{
+ return cs_etm_decoder__buffer_packet(queue, trace_chan_id,
+ CS_ETM_EXCEPTION_RET);
+}
+
+static ocsd_datapath_resp_t
+cs_etm_decoder__set_tid(struct cs_etm_queue *etmq,
+ struct cs_etm_packet_queue *packet_queue,
+ const ocsd_generic_trace_elem *elem,
+ const uint8_t trace_chan_id)
+{
+ pid_t tid = -1;
+
+ /*
+ * Process the PE_CONTEXT packets if we have a valid contextID or VMID.
+ * If the kernel is running at EL2, the PID is traced in CONTEXTIDR_EL2
+ * as VMID, Bit ETM_OPT_CTXTID2 is set in this case.
+ */
+ switch (cs_etm__get_pid_fmt(etmq)) {
+ case CS_ETM_PIDFMT_CTXTID:
+ if (elem->context.ctxt_id_valid)
+ tid = elem->context.context_id;
+ break;
+ case CS_ETM_PIDFMT_CTXTID2:
+ if (elem->context.vmid_valid)
+ tid = elem->context.vmid;
+ break;
+ case CS_ETM_PIDFMT_NONE:
+ default:
+ break;
+ }
+
+ if (cs_etm__etmq_set_tid_el(etmq, tid, trace_chan_id,
+ elem->context.exception_level))
+ return OCSD_RESP_FATAL_SYS_ERR;
+
+ if (tid == -1)
+ return OCSD_RESP_CONT;
+
+ /*
+ * A timestamp is generated after a PE_CONTEXT element so make sure
+ * to rely on that coming one.
+ */
+ cs_etm_decoder__reset_timestamp(packet_queue);
+
+ return OCSD_RESP_CONT;
+}
+
+static ocsd_datapath_resp_t cs_etm_decoder__gen_trace_elem_printer(
+ const void *context,
+ const ocsd_trc_index_t indx,
+ const u8 trace_chan_id __maybe_unused,
+ const ocsd_generic_trace_elem *elem)
+{
+ ocsd_datapath_resp_t resp = OCSD_RESP_CONT;
+ struct cs_etm_decoder *decoder = (struct cs_etm_decoder *) context;
+ struct cs_etm_queue *etmq = decoder->data;
+ struct cs_etm_packet_queue *packet_queue;
+
+ /* First get the packet queue for this traceID */
+ packet_queue = cs_etm__etmq_get_packet_queue(etmq, trace_chan_id);
+ if (!packet_queue)
+ return OCSD_RESP_FATAL_SYS_ERR;
+
+ switch (elem->elem_type) {
+ case OCSD_GEN_TRC_ELEM_UNKNOWN:
+ break;
+ case OCSD_GEN_TRC_ELEM_EO_TRACE:
+ case OCSD_GEN_TRC_ELEM_NO_SYNC:
+ case OCSD_GEN_TRC_ELEM_TRACE_ON:
+ resp = cs_etm_decoder__buffer_discontinuity(packet_queue,
+ trace_chan_id);
+ break;
+ case OCSD_GEN_TRC_ELEM_INSTR_RANGE:
+ resp = cs_etm_decoder__buffer_range(etmq, packet_queue, elem,
+ trace_chan_id);
+ break;
+ case OCSD_GEN_TRC_ELEM_EXCEPTION:
+ resp = cs_etm_decoder__buffer_exception(packet_queue, elem,
+ trace_chan_id);
+ break;
+ case OCSD_GEN_TRC_ELEM_EXCEPTION_RET:
+ resp = cs_etm_decoder__buffer_exception_ret(packet_queue,
+ trace_chan_id);
+ break;
+ case OCSD_GEN_TRC_ELEM_TIMESTAMP:
+ resp = cs_etm_decoder__do_hard_timestamp(etmq, elem,
+ trace_chan_id,
+ indx);
+ break;
+ case OCSD_GEN_TRC_ELEM_PE_CONTEXT:
+ resp = cs_etm_decoder__set_tid(etmq, packet_queue,
+ elem, trace_chan_id);
+ break;
+ /* Unused packet types */
+ case OCSD_GEN_TRC_ELEM_I_RANGE_NOPATH:
+ case OCSD_GEN_TRC_ELEM_ADDR_NACC:
+ case OCSD_GEN_TRC_ELEM_CYCLE_COUNT:
+ case OCSD_GEN_TRC_ELEM_ADDR_UNKNOWN:
+ case OCSD_GEN_TRC_ELEM_EVENT:
+ case OCSD_GEN_TRC_ELEM_SWTRACE:
+ case OCSD_GEN_TRC_ELEM_CUSTOM:
+ case OCSD_GEN_TRC_ELEM_SYNC_MARKER:
+ case OCSD_GEN_TRC_ELEM_MEMTRANS:
+#if (OCSD_VER_NUM >= 0x010400)
+ case OCSD_GEN_TRC_ELEM_INSTRUMENTATION:
+#endif
+ default:
+ break;
+ }
+
+ return resp;
+}
+
+static int
+cs_etm_decoder__create_etm_decoder(struct cs_etm_decoder_params *d_params,
+ struct cs_etm_trace_params *t_params,
+ struct cs_etm_decoder *decoder)
+{
+ ocsd_etmv3_cfg config_etmv3;
+ ocsd_etmv4_cfg trace_config_etmv4;
+ ocsd_ete_cfg trace_config_ete;
+ void *trace_config;
+ u8 csid;
+
+ switch (t_params->protocol) {
+ case CS_ETM_PROTO_ETMV3:
+ case CS_ETM_PROTO_PTM:
+ csid = (t_params->etmv3.reg_idr & CORESIGHT_TRACE_ID_VAL_MASK);
+ cs_etm_decoder__gen_etmv3_config(t_params, &config_etmv3);
+ decoder->decoder_name = (t_params->protocol == CS_ETM_PROTO_ETMV3) ?
+ OCSD_BUILTIN_DCD_ETMV3 :
+ OCSD_BUILTIN_DCD_PTM;
+ trace_config = &config_etmv3;
+ break;
+ case CS_ETM_PROTO_ETMV4i:
+ csid = (t_params->etmv4.reg_traceidr & CORESIGHT_TRACE_ID_VAL_MASK);
+ cs_etm_decoder__gen_etmv4_config(t_params, &trace_config_etmv4);
+ decoder->decoder_name = OCSD_BUILTIN_DCD_ETMV4I;
+ trace_config = &trace_config_etmv4;
+ break;
+ case CS_ETM_PROTO_ETE:
+ csid = (t_params->ete.reg_traceidr & CORESIGHT_TRACE_ID_VAL_MASK);
+ cs_etm_decoder__gen_ete_config(t_params, &trace_config_ete);
+ decoder->decoder_name = OCSD_BUILTIN_DCD_ETE;
+ trace_config = &trace_config_ete;
+ break;
+ default:
+ return -1;
+ }
+
+ /* if the CPU has no trace ID associated, no decoder needed */
+ if (csid == CORESIGHT_TRACE_ID_UNUSED_VAL)
+ return 0;
+
+ if (d_params->operation == CS_ETM_OPERATION_DECODE) {
+ if (ocsd_dt_create_decoder(decoder->dcd_tree,
+ decoder->decoder_name,
+ OCSD_CREATE_FLG_FULL_DECODER,
+ trace_config, &csid))
+ return -1;
+
+ if (ocsd_dt_set_gen_elem_outfn(decoder->dcd_tree,
+ cs_etm_decoder__gen_trace_elem_printer,
+ decoder))
+ return -1;
+
+ return 0;
+ } else if (d_params->operation == CS_ETM_OPERATION_PRINT) {
+ if (ocsd_dt_create_decoder(decoder->dcd_tree, decoder->decoder_name,
+ OCSD_CREATE_FLG_PACKET_PROC,
+ trace_config, &csid))
+ return -1;
+
+ if (ocsd_dt_set_pkt_protocol_printer(decoder->dcd_tree, csid, 0))
+ return -1;
+
+ return 0;
+ }
+
+ return -1;
+}
+
+struct cs_etm_decoder *
+cs_etm_decoder__new(int decoders, struct cs_etm_decoder_params *d_params,
+ struct cs_etm_trace_params t_params[])
+{
+ struct cs_etm_decoder *decoder;
+ ocsd_dcd_tree_src_t format;
+ u32 flags;
+ int i, ret;
+
+ if ((!t_params) || (!d_params))
+ return NULL;
+
+ decoder = zalloc(sizeof(*decoder));
+
+ if (!decoder)
+ return NULL;
+
+ decoder->data = d_params->data;
+ decoder->prev_return = OCSD_RESP_CONT;
+ format = (d_params->formatted ? OCSD_TRC_SRC_FRAME_FORMATTED :
+ OCSD_TRC_SRC_SINGLE);
+ flags = 0;
+ flags |= (d_params->fsyncs ? OCSD_DFRMTR_HAS_FSYNCS : 0);
+ flags |= (d_params->hsyncs ? OCSD_DFRMTR_HAS_HSYNCS : 0);
+ flags |= (d_params->frame_aligned ? OCSD_DFRMTR_FRAME_MEM_ALIGN : 0);
+
+ /*
+ * Drivers may add barrier frames when used with perf, set up to
+ * handle this. Barriers const of FSYNC packet repeated 4 times.
+ */
+ flags |= OCSD_DFRMTR_RESET_ON_4X_FSYNC;
+
+ /* Create decode tree for the data source */
+ decoder->dcd_tree = ocsd_create_dcd_tree(format, flags);
+
+ if (decoder->dcd_tree == 0)
+ goto err_free_decoder;
+
+ /* init library print logging support */
+ ret = cs_etm_decoder__init_def_logger_printing(d_params, decoder);
+ if (ret != 0)
+ goto err_free_decoder;
+
+ /* init raw frame logging if required */
+ cs_etm_decoder__init_raw_frame_logging(d_params, decoder);
+
+ for (i = 0; i < decoders; i++) {
+ ret = cs_etm_decoder__create_etm_decoder(d_params,
+ &t_params[i],
+ decoder);
+ if (ret != 0)
+ goto err_free_decoder;
+ }
+
+ return decoder;
+
+err_free_decoder:
+ cs_etm_decoder__free(decoder);
+ return NULL;
+}
+
+int cs_etm_decoder__process_data_block(struct cs_etm_decoder *decoder,
+ u64 indx, const u8 *buf,
+ size_t len, size_t *consumed)
+{
+ int ret = 0;
+ ocsd_datapath_resp_t cur = OCSD_RESP_CONT;
+ ocsd_datapath_resp_t prev_return = decoder->prev_return;
+ size_t processed = 0;
+ u32 count;
+
+ while (processed < len) {
+ if (OCSD_DATA_RESP_IS_WAIT(prev_return)) {
+ cur = ocsd_dt_process_data(decoder->dcd_tree,
+ OCSD_OP_FLUSH,
+ 0,
+ 0,
+ NULL,
+ NULL);
+ } else if (OCSD_DATA_RESP_IS_CONT(prev_return)) {
+ cur = ocsd_dt_process_data(decoder->dcd_tree,
+ OCSD_OP_DATA,
+ indx + processed,
+ len - processed,
+ &buf[processed],
+ &count);
+ processed += count;
+ } else {
+ ret = -EINVAL;
+ break;
+ }
+
+ /*
+ * Return to the input code if the packet buffer is full.
+ * Flushing will get done once the packet buffer has been
+ * processed.
+ */
+ if (OCSD_DATA_RESP_IS_WAIT(cur))
+ break;
+
+ prev_return = cur;
+ }
+
+ decoder->prev_return = cur;
+ *consumed = processed;
+
+ return ret;
+}
+
+void cs_etm_decoder__free(struct cs_etm_decoder *decoder)
+{
+ if (!decoder)
+ return;
+
+ ocsd_destroy_dcd_tree(decoder->dcd_tree);
+ decoder->dcd_tree = NULL;
+ free(decoder);
+}
+
+const char *cs_etm_decoder__get_name(struct cs_etm_decoder *decoder)
+{
+ return decoder->decoder_name;
+}
diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h
new file mode 100644
index 0000000000..272c2efe78
--- /dev/null
+++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h
@@ -0,0 +1,111 @@
+/*
+ * 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>
+ */
+
+#ifndef INCLUDE__CS_ETM_DECODER_H__
+#define INCLUDE__CS_ETM_DECODER_H__
+
+#include <linux/types.h>
+#include <opencsd/ocsd_if_types.h>
+#include <stdio.h>
+
+struct cs_etm_decoder;
+struct cs_etm_packet;
+struct cs_etm_packet_queue;
+
+struct cs_etm_queue;
+
+typedef u32 (*cs_etm_mem_cb_type)(struct cs_etm_queue *, u8, u64, size_t, u8 *,
+ const ocsd_mem_space_acc_t);
+
+struct cs_etmv3_trace_params {
+ u32 reg_ctrl;
+ u32 reg_trc_id;
+ u32 reg_ccer;
+ u32 reg_idr;
+};
+
+struct cs_etmv4_trace_params {
+ u32 reg_idr0;
+ u32 reg_idr1;
+ u32 reg_idr2;
+ u32 reg_idr8;
+ u32 reg_configr;
+ u32 reg_traceidr;
+};
+
+struct cs_ete_trace_params {
+ u32 reg_idr0;
+ u32 reg_idr1;
+ u32 reg_idr2;
+ u32 reg_idr8;
+ u32 reg_configr;
+ u32 reg_traceidr;
+ u32 reg_devarch;
+};
+
+struct cs_etm_trace_params {
+ int protocol;
+ union {
+ struct cs_etmv3_trace_params etmv3;
+ struct cs_etmv4_trace_params etmv4;
+ struct cs_ete_trace_params ete;
+ };
+};
+
+struct cs_etm_decoder_params {
+ int operation;
+ void (*packet_printer)(const char *msg);
+ cs_etm_mem_cb_type mem_acc_cb;
+ bool formatted;
+ bool fsyncs;
+ bool hsyncs;
+ bool frame_aligned;
+ void *data;
+};
+
+/*
+ * The following enums are indexed starting with 1 to align with the
+ * open source coresight trace decoder library.
+ */
+enum {
+ CS_ETM_PROTO_ETMV3 = 1,
+ CS_ETM_PROTO_ETMV4i,
+ CS_ETM_PROTO_ETMV4d,
+ CS_ETM_PROTO_PTM,
+ CS_ETM_PROTO_ETE
+};
+
+enum cs_etm_decoder_operation {
+ CS_ETM_OPERATION_PRINT = 1,
+ CS_ETM_OPERATION_DECODE,
+ CS_ETM_OPERATION_MAX,
+};
+
+int cs_etm_decoder__process_data_block(struct cs_etm_decoder *decoder,
+ u64 indx, const u8 *buf,
+ size_t len, size_t *consumed);
+
+struct cs_etm_decoder *
+cs_etm_decoder__new(int num_cpu,
+ struct cs_etm_decoder_params *d_params,
+ struct cs_etm_trace_params t_params[]);
+
+void cs_etm_decoder__free(struct cs_etm_decoder *decoder);
+
+int cs_etm_decoder__add_mem_access_cb(struct cs_etm_decoder *decoder,
+ u64 start, u64 end,
+ cs_etm_mem_cb_type cb_func);
+
+int cs_etm_decoder__get_packet(struct cs_etm_packet_queue *packet_queue,
+ struct cs_etm_packet *packet);
+
+int cs_etm_decoder__reset(struct cs_etm_decoder *decoder);
+const char *cs_etm_decoder__get_name(struct cs_etm_decoder *decoder);
+
+#endif /* INCLUDE__CS_ETM_DECODER_H__ */