/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright(C) 2015 Linaro Limited. All rights reserved.
* Author: Mathieu Poirier <[email protected]>
*/
#ifndef INCLUDE__UTIL_PERF_CS_ETM_H__
#define INCLUDE__UTIL_PERF_CS_ETM_H__
#include "debug.h"
#include "util/event.h"
#include <linux/bits.h>
struct perf_session;
struct perf_pmu;
/*
* Versioning header in case things need to change in the future. That way
* decoding of old snapshot is still possible.
*/
enum {
/* Starting with 0x0 */
CS_HEADER_VERSION,
/* PMU->type (32 bit), total # of CPUs (32 bit) */
CS_PMU_TYPE_CPUS,
CS_ETM_SNAPSHOT,
CS_HEADER_VERSION_MAX,
};
/*
* Update the version for new format.
*
* Version 1: format adds a param count to the per cpu metadata.
* This allows easy adding of new metadata parameters.
* Requires that new params always added after current ones.
* Also allows client reader to handle file versions that are different by
* checking the number of params in the file vs the number expected.
*
* Version 2: Drivers will use PERF_RECORD_AUX_OUTPUT_HW_ID to output
* CoreSight Trace ID. ...TRACEIDR metadata will be set to legacy values
* but with addition flags.
*/
#define CS_HEADER_CURRENT_VERSION 2
/* Beginning of header common to both ETMv3 and V4 */
enum {
CS_ETM_MAGIC,
CS_ETM_CPU,
/* Number of trace config params in following ETM specific block */
CS_ETM_NR_TRC_PARAMS,
CS_ETM_COMMON_BLK_MAX_V1,
};
/* ETMv3/PTM metadata */
enum {
/* Dynamic, configurable parameters */
CS_ETM_ETMCR = CS_ETM_COMMON_BLK_MAX_V1,
CS_ETM_ETMTRACEIDR,
/* RO, taken from sysFS */
CS_ETM_ETMCCER,
CS_ETM_ETMIDR,
CS_ETM_PRIV_MAX,
};
/* define fixed version 0 length - allow new format reader to read old files. */
#define CS_ETM_NR_TRC_PARAMS_V0 (CS_ETM_ETMIDR - CS_ETM_ETMCR + 1)
/* ETMv4 metadata */
enum {
/* Dynamic, configurable parameters */
CS_ETMV4_TRCCONFIGR = CS_ETM_COMMON_BLK_MAX_V1,
CS_ETMV4_TRCTRACEIDR,
/* RO, taken from sysFS */
CS_ETMV4_TRCIDR0,
CS_ETMV4_TRCIDR1,
CS_ETMV4_TRCIDR2,
CS_ETMV4_TRCIDR8,
CS_ETMV4_TRCAUTHSTATUS,
CS_ETMV4_TS_SOURCE,
CS_ETMV4_PRIV_MAX,
};
/* define fixed version 0 length - allow new format reader to read old files. */
#define CS_ETMV4_NR_TRC_PARAMS_V0 (CS_ETMV4_TRCAUTHSTATUS - CS_ETMV4_TRCCONFIGR + 1)
/*
* ETE metadata is ETMv4 plus TRCDEVARCH register and doesn't support header V0 since it was
* added in header V1
*/
enum {
/* Dynamic, configurable parameters */
CS_ETE_TRCCONFIGR = CS_ETM_COMMON_BLK_MAX_V1,
CS_ETE_TRCTRACEIDR,
/* RO, taken from sysFS */
CS_ETE_TRCIDR0,
CS_ETE_TRCIDR1,
CS_ETE_TRCIDR2,
CS_ETE_TRCIDR8,
CS_ETE_TRCAUTHSTATUS,
CS_ETE_TRCDEVARCH,
CS_ETE_TS_SOURCE,
CS_ETE_PRIV_MAX
};
/*
* Check for valid CoreSight trace ID. If an invalid value is present in the metadata,
* then IDs are present in the hardware ID packet in the data file.
*/
#define CS_IS_VALID_TRACE_ID(id) ((id > 0) && (id < 0x70))
/*
* ETMv3 exception encoding number:
* See Embedded Trace Macrocell specification (ARM IHI 0014Q)
* table 7-12 Encoding of Exception[3:0] for non-ARMv7-M processors.
*/
enum {
CS_ETMV3_EXC_NONE = 0,
CS_ETMV3_EXC_DEBUG_HALT = 1,
CS_ETMV3_EXC_SMC = 2,
CS_ETMV3_EXC_HYP = 3,
CS_ETMV3_EXC_ASYNC_DATA_ABORT = 4,
CS_ETMV3_EXC_JAZELLE_THUMBEE = 5,
CS_ETMV3_EXC_PE_RESET = 8,
CS_ETMV3_EXC_UNDEFINED_INSTR = 9,
CS_ETMV3_EXC_SVC = 10,
CS_ETMV3_EXC_PREFETCH_ABORT = 11,
CS_ETMV3_EXC_DATA_FAULT = 12,
CS_ETMV3_EXC_GENERIC = 13,
CS_ETMV3_EXC_IRQ = 14,
CS_ETMV3_EXC_FIQ = 15,
};
/*
* ETMv4 exception encoding number:
* See ARM Embedded Trace Macrocell Architecture Specification (ARM IHI 0064D)
* table 6-12 Possible values for the TYPE field in an Exception instruction
* trace packet, for ARMv7-A/R and ARMv8-A/R PEs.
*/
enum {
CS_ETMV4_EXC_RESET = 0,
CS_ETMV4_EXC_DEBUG_HALT = 1,
CS_ETMV4_EXC_CALL = 2,
CS_ETMV4_EXC_TRAP = 3,
CS_ETMV4_EXC_SYSTEM_ERROR = 4,
CS_ETMV4_EXC_INST_DEBUG = 6,
CS_ETMV4_EXC_DATA_DEBUG = 7,
CS_ETMV4_EXC_ALIGNMENT = 10,
CS_ETMV4_EXC_INST_FAULT = 11,
CS_ETMV4_EXC_DATA_FAULT = 12,
CS_ETMV4_EXC_IRQ = 14,
CS_ETMV4_EXC_FIQ = 15,
CS_ETMV4_EXC_END = 31,
};
enum cs_etm_sample_type {
CS_ETM_EMPTY,
CS_ETM_RANGE,
CS_ETM_DISCONTINUITY,
CS_ETM_EXCEPTION,
CS_ETM_EXCEPTION_RET,
};
enum cs_etm_isa {
CS_ETM_ISA_UNKNOWN,
CS_ETM_ISA_A64,
CS_ETM_ISA_A32,
CS_ETM_ISA_T32,
};
struct cs_etm_queue;
struct cs_etm_packet {
enum cs_etm_sample_type sample_type;
enum cs_etm_isa isa;
u64 start_addr;
u64 end_addr;
u32 instr_count;
u32 last_instr_type;
u32 last_instr_subtype;
u32 flags;
u32 exception_number;
bool last_instr_cond;
bool last_instr_taken_branch;
u8 last_instr_size;
u8 trace_chan_id;
int cpu;
};
#define CS_ETM_PACKET_MAX_BUFFER 1024
/*
* When working with per-thread scenarios the process under trace can
* be scheduled on any CPU and as such, more than one traceID may be
* associated with the same process. Since a traceID of '0' is illegal
* as per the CoreSight architecture, use that specific value to
* identify the queue where all packets (with any traceID) are
* aggregated.
*/
#define CS_ETM_PER_THREAD_TRACEID 0
struct cs_etm_packet_queue {
u32 packet_count;
u32 head;
u32 tail;
u32 instr_count;
u64 cs_timestamp; /* Timestamp from trace data, converted to ns if possible */
u64 next_cs_timestamp;
struct cs_etm_packet packet_buffer[CS_ETM_PACKET_MAX_BUFFER];
};
#define KiB(x) ((x) * 1024)
#define MiB(x) ((x) * 1024 * 1024)
#define CS_ETM_INVAL_ADDR 0xdeadbeefdeadbeefUL
#define BMVAL(val, lsb, msb) ((val & GENMASK(msb, lsb)) >> lsb)
#define CS_ETM_HEADER_SIZE (CS_HEADER_VERSION_MAX * sizeof(u64))
#define __perf_cs_etmv3_magic 0x3030303030303030ULL
#define __perf_cs_etmv4_magic 0x4040404040404040ULL
#define __perf_cs_ete_magic 0x5050505050505050ULL
#define CS_ETMV3_PRIV_SIZE (CS_ETM_PRIV_MAX * sizeof(u64))
#define CS_ETMV4_PRIV_SIZE (CS_ETMV4_PRIV_MAX * sizeof(u64))
#define CS_ETE_PRIV_SIZE (CS_ETE_PRIV_MAX * sizeof(u64))
#define INFO_HEADER_SIZE (sizeof(((struct perf_record_auxtrace_info *)0)->type) + \
sizeof(((struct perf_record_auxtrace_info *)0)->reserved__))
/* CoreSight trace ID is currently the bottom 7 bits of the value */
#define CORESIGHT_TRACE_ID_VAL_MASK GENMASK(6, 0)
/*
* perf record will set the legacy meta data values as unused initially.
* This allows perf report to manage the decoders created when dynamic
* allocation in operation.
*/
#define CORESIGHT_TRACE_ID_UNUSED_FLAG BIT(31)
/* Value to set for unused trace ID values */
#define CORESIGHT_TRACE_ID_UNUSED_VAL 0x7F
int cs_etm__process_auxtrace_info(union perf_event *event,
struct perf_session *session);
void cs_etm_get_default_config(const struct perf_pmu *pmu, struct perf_event_attr *attr);
enum cs_etm_pid_fmt {
CS_ETM_PIDFMT_NONE,
CS_ETM_PIDFMT_CTXTID,
CS_ETM_PIDFMT_CTXTID2
};
#ifdef HAVE_CSTRACE_SUPPORT
#include <opencsd/ocsd_if_types.h>
int cs_etm__get_cpu(u8 trace_chan_id, int *cpu);
enum cs_etm_pid_fmt cs_etm__get_pid_fmt(struct cs_etm_queue *etmq);
int cs_etm__etmq_set_tid_el(struct cs_etm_queue *etmq, pid_t tid,
u8 trace_chan_id, ocsd_ex_level el);
bool cs_etm__etmq_is_timeless(struct cs_etm_queue *etmq);
void cs_etm__etmq_set_traceid_queue_timestamp(struct cs_etm_queue *etmq,
u8 trace_chan_id);
struct cs_etm_packet_queue
*cs_etm__etmq_get_packet_queue(struct cs_etm_queue *etmq, u8 trace_chan_id);
int cs_etm__process_auxtrace_info_full(union perf_event *event __maybe_unused,
struct perf_session *session __maybe_unused);
u64 cs_etm__convert_sample_time(struct cs_etm_queue *etmq, u64 cs_timestamp);
#else
static inline int
cs_etm__process_auxtrace_info_full(union perf_event *event __maybe_unused,
struct perf_session *session __maybe_unused)
{
pr_err("\nCS ETM Trace: OpenCSD is not linked in, please recompile with CORESIGHT=1\n");
return -1;
}
#endif
#endif
Codebase Browser
linux