diff options
Diffstat (limited to 'tools/perf/util/arm-spe-pkt-decoder.c')
| -rw-r--r-- | tools/perf/util/arm-spe-pkt-decoder.c | 462 |
1 files changed, 0 insertions, 462 deletions
diff --git a/tools/perf/util/arm-spe-pkt-decoder.c b/tools/perf/util/arm-spe-pkt-decoder.c deleted file mode 100644 index b94001b756c7..000000000000 --- a/tools/perf/util/arm-spe-pkt-decoder.c +++ /dev/null @@ -1,462 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Arm Statistical Profiling Extensions (SPE) support - * Copyright (c) 2017-2018, Arm Ltd. - */ - -#include <stdio.h> -#include <string.h> -#include <endian.h> -#include <byteswap.h> - -#include "arm-spe-pkt-decoder.h" - -#define BIT(n) (1ULL << (n)) - -#define NS_FLAG BIT(63) -#define EL_FLAG (BIT(62) | BIT(61)) - -#define SPE_HEADER0_PAD 0x0 -#define SPE_HEADER0_END 0x1 -#define SPE_HEADER0_ADDRESS 0x30 /* address packet (short) */ -#define SPE_HEADER0_ADDRESS_MASK 0x38 -#define SPE_HEADER0_COUNTER 0x18 /* counter packet (short) */ -#define SPE_HEADER0_COUNTER_MASK 0x38 -#define SPE_HEADER0_TIMESTAMP 0x71 -#define SPE_HEADER0_TIMESTAMP 0x71 -#define SPE_HEADER0_EVENTS 0x2 -#define SPE_HEADER0_EVENTS_MASK 0xf -#define SPE_HEADER0_SOURCE 0x3 -#define SPE_HEADER0_SOURCE_MASK 0xf -#define SPE_HEADER0_CONTEXT 0x24 -#define SPE_HEADER0_CONTEXT_MASK 0x3c -#define SPE_HEADER0_OP_TYPE 0x8 -#define SPE_HEADER0_OP_TYPE_MASK 0x3c -#define SPE_HEADER1_ALIGNMENT 0x0 -#define SPE_HEADER1_ADDRESS 0xb0 /* address packet (extended) */ -#define SPE_HEADER1_ADDRESS_MASK 0xf8 -#define SPE_HEADER1_COUNTER 0x98 /* counter packet (extended) */ -#define SPE_HEADER1_COUNTER_MASK 0xf8 - -#if __BYTE_ORDER == __BIG_ENDIAN -#define le16_to_cpu bswap_16 -#define le32_to_cpu bswap_32 -#define le64_to_cpu bswap_64 -#define memcpy_le64(d, s, n) do { \ - memcpy((d), (s), (n)); \ - *(d) = le64_to_cpu(*(d)); \ -} while (0) -#else -#define le16_to_cpu -#define le32_to_cpu -#define le64_to_cpu -#define memcpy_le64 memcpy -#endif - -static const char * const arm_spe_packet_name[] = { - [ARM_SPE_PAD] = "PAD", - [ARM_SPE_END] = "END", - [ARM_SPE_TIMESTAMP] = "TS", - [ARM_SPE_ADDRESS] = "ADDR", - [ARM_SPE_COUNTER] = "LAT", - [ARM_SPE_CONTEXT] = "CONTEXT", - [ARM_SPE_OP_TYPE] = "OP-TYPE", - [ARM_SPE_EVENTS] = "EVENTS", - [ARM_SPE_DATA_SOURCE] = "DATA-SOURCE", -}; - -const char *arm_spe_pkt_name(enum arm_spe_pkt_type type) -{ - return arm_spe_packet_name[type]; -} - -/* return ARM SPE payload size from its encoding, - * which is in bits 5:4 of the byte. - * 00 : byte - * 01 : halfword (2) - * 10 : word (4) - * 11 : doubleword (8) - */ -static int payloadlen(unsigned char byte) -{ - return 1 << ((byte & 0x30) >> 4); -} - -static int arm_spe_get_payload(const unsigned char *buf, size_t len, - struct arm_spe_pkt *packet) -{ - size_t payload_len = payloadlen(buf[0]); - - if (len < 1 + payload_len) - return ARM_SPE_NEED_MORE_BYTES; - - buf++; - - switch (payload_len) { - case 1: packet->payload = *(uint8_t *)buf; break; - case 2: packet->payload = le16_to_cpu(*(uint16_t *)buf); break; - case 4: packet->payload = le32_to_cpu(*(uint32_t *)buf); break; - case 8: packet->payload = le64_to_cpu(*(uint64_t *)buf); break; - default: return ARM_SPE_BAD_PACKET; - } - - return 1 + payload_len; -} - -static int arm_spe_get_pad(struct arm_spe_pkt *packet) -{ - packet->type = ARM_SPE_PAD; - return 1; -} - -static int arm_spe_get_alignment(const unsigned char *buf, size_t len, - struct arm_spe_pkt *packet) -{ - unsigned int alignment = 1 << ((buf[0] & 0xf) + 1); - - if (len < alignment) - return ARM_SPE_NEED_MORE_BYTES; - - packet->type = ARM_SPE_PAD; - return alignment - (((uintptr_t)buf) & (alignment - 1)); -} - -static int arm_spe_get_end(struct arm_spe_pkt *packet) -{ - packet->type = ARM_SPE_END; - return 1; -} - -static int arm_spe_get_timestamp(const unsigned char *buf, size_t len, - struct arm_spe_pkt *packet) -{ - packet->type = ARM_SPE_TIMESTAMP; - return arm_spe_get_payload(buf, len, packet); -} - -static int arm_spe_get_events(const unsigned char *buf, size_t len, - struct arm_spe_pkt *packet) -{ - int ret = arm_spe_get_payload(buf, len, packet); - - packet->type = ARM_SPE_EVENTS; - - /* we use index to identify Events with a less number of - * comparisons in arm_spe_pkt_desc(): E.g., the LLC-ACCESS, - * LLC-REFILL, and REMOTE-ACCESS events are identified iff - * index > 1. - */ - packet->index = ret - 1; - - return ret; -} - -static int arm_spe_get_data_source(const unsigned char *buf, size_t len, - struct arm_spe_pkt *packet) -{ - packet->type = ARM_SPE_DATA_SOURCE; - return arm_spe_get_payload(buf, len, packet); -} - -static int arm_spe_get_context(const unsigned char *buf, size_t len, - struct arm_spe_pkt *packet) -{ - packet->type = ARM_SPE_CONTEXT; - packet->index = buf[0] & 0x3; - - return arm_spe_get_payload(buf, len, packet); -} - -static int arm_spe_get_op_type(const unsigned char *buf, size_t len, - struct arm_spe_pkt *packet) -{ - packet->type = ARM_SPE_OP_TYPE; - packet->index = buf[0] & 0x3; - return arm_spe_get_payload(buf, len, packet); -} - -static int arm_spe_get_counter(const unsigned char *buf, size_t len, - const unsigned char ext_hdr, struct arm_spe_pkt *packet) -{ - if (len < 2) - return ARM_SPE_NEED_MORE_BYTES; - - packet->type = ARM_SPE_COUNTER; - if (ext_hdr) - packet->index = ((buf[0] & 0x3) << 3) | (buf[1] & 0x7); - else - packet->index = buf[0] & 0x7; - - packet->payload = le16_to_cpu(*(uint16_t *)(buf + 1)); - - return 1 + ext_hdr + 2; -} - -static int arm_spe_get_addr(const unsigned char *buf, size_t len, - const unsigned char ext_hdr, struct arm_spe_pkt *packet) -{ - if (len < 8) - return ARM_SPE_NEED_MORE_BYTES; - - packet->type = ARM_SPE_ADDRESS; - if (ext_hdr) - packet->index = ((buf[0] & 0x3) << 3) | (buf[1] & 0x7); - else - packet->index = buf[0] & 0x7; - - memcpy_le64(&packet->payload, buf + 1, 8); - - return 1 + ext_hdr + 8; -} - -static int arm_spe_do_get_packet(const unsigned char *buf, size_t len, - struct arm_spe_pkt *packet) -{ - unsigned int byte; - - memset(packet, 0, sizeof(struct arm_spe_pkt)); - - if (!len) - return ARM_SPE_NEED_MORE_BYTES; - - byte = buf[0]; - if (byte == SPE_HEADER0_PAD) - return arm_spe_get_pad(packet); - else if (byte == SPE_HEADER0_END) /* no timestamp at end of record */ - return arm_spe_get_end(packet); - else if (byte & 0xc0 /* 0y11xxxxxx */) { - if (byte & 0x80) { - if ((byte & SPE_HEADER0_ADDRESS_MASK) == SPE_HEADER0_ADDRESS) - return arm_spe_get_addr(buf, len, 0, packet); - if ((byte & SPE_HEADER0_COUNTER_MASK) == SPE_HEADER0_COUNTER) - return arm_spe_get_counter(buf, len, 0, packet); - } else - if (byte == SPE_HEADER0_TIMESTAMP) - return arm_spe_get_timestamp(buf, len, packet); - else if ((byte & SPE_HEADER0_EVENTS_MASK) == SPE_HEADER0_EVENTS) - return arm_spe_get_events(buf, len, packet); - else if ((byte & SPE_HEADER0_SOURCE_MASK) == SPE_HEADER0_SOURCE) - return arm_spe_get_data_source(buf, len, packet); - else if ((byte & SPE_HEADER0_CONTEXT_MASK) == SPE_HEADER0_CONTEXT) - return arm_spe_get_context(buf, len, packet); - else if ((byte & SPE_HEADER0_OP_TYPE_MASK) == SPE_HEADER0_OP_TYPE) - return arm_spe_get_op_type(buf, len, packet); - } else if ((byte & 0xe0) == 0x20 /* 0y001xxxxx */) { - /* 16-bit header */ - byte = buf[1]; - if (byte == SPE_HEADER1_ALIGNMENT) - return arm_spe_get_alignment(buf, len, packet); - else if ((byte & SPE_HEADER1_ADDRESS_MASK) == SPE_HEADER1_ADDRESS) - return arm_spe_get_addr(buf, len, 1, packet); - else if ((byte & SPE_HEADER1_COUNTER_MASK) == SPE_HEADER1_COUNTER) - return arm_spe_get_counter(buf, len, 1, packet); - } - - return ARM_SPE_BAD_PACKET; -} - -int arm_spe_get_packet(const unsigned char *buf, size_t len, - struct arm_spe_pkt *packet) -{ - int ret; - - ret = arm_spe_do_get_packet(buf, len, packet); - /* put multiple consecutive PADs on the same line, up to - * the fixed-width output format of 16 bytes per line. - */ - if (ret > 0 && packet->type == ARM_SPE_PAD) { - while (ret < 16 && len > (size_t)ret && !buf[ret]) - ret += 1; - } - return ret; -} - -int arm_spe_pkt_desc(const struct arm_spe_pkt *packet, char *buf, - size_t buf_len) -{ - int ret, ns, el, idx = packet->index; - unsigned long long payload = packet->payload; - const char *name = arm_spe_pkt_name(packet->type); - - switch (packet->type) { - case ARM_SPE_BAD: - case ARM_SPE_PAD: - case ARM_SPE_END: - return snprintf(buf, buf_len, "%s", name); - case ARM_SPE_EVENTS: { - size_t blen = buf_len; - - ret = 0; - ret = snprintf(buf, buf_len, "EV"); - buf += ret; - blen -= ret; - if (payload & 0x1) { - ret = snprintf(buf, buf_len, " EXCEPTION-GEN"); - buf += ret; - blen -= ret; - } - if (payload & 0x2) { - ret = snprintf(buf, buf_len, " RETIRED"); - buf += ret; - blen -= ret; - } - if (payload & 0x4) { - ret = snprintf(buf, buf_len, " L1D-ACCESS"); - buf += ret; - blen -= ret; - } - if (payload & 0x8) { - ret = snprintf(buf, buf_len, " L1D-REFILL"); - buf += ret; - blen -= ret; - } - if (payload & 0x10) { - ret = snprintf(buf, buf_len, " TLB-ACCESS"); - buf += ret; - blen -= ret; - } - if (payload & 0x20) { - ret = snprintf(buf, buf_len, " TLB-REFILL"); - buf += ret; - blen -= ret; - } - if (payload & 0x40) { - ret = snprintf(buf, buf_len, " NOT-TAKEN"); - buf += ret; - blen -= ret; - } - if (payload & 0x80) { - ret = snprintf(buf, buf_len, " MISPRED"); - buf += ret; - blen -= ret; - } - if (idx > 1) { - if (payload & 0x100) { - ret = snprintf(buf, buf_len, " LLC-ACCESS"); - buf += ret; - blen -= ret; - } - if (payload & 0x200) { - ret = snprintf(buf, buf_len, " LLC-REFILL"); - buf += ret; - blen -= ret; - } - if (payload & 0x400) { - ret = snprintf(buf, buf_len, " REMOTE-ACCESS"); - buf += ret; - blen -= ret; - } - } - if (ret < 0) - return ret; - blen -= ret; - return buf_len - blen; - } - case ARM_SPE_OP_TYPE: - switch (idx) { - case 0: return snprintf(buf, buf_len, "%s", payload & 0x1 ? - "COND-SELECT" : "INSN-OTHER"); - case 1: { - size_t blen = buf_len; - - if (payload & 0x1) - ret = snprintf(buf, buf_len, "ST"); - else - ret = snprintf(buf, buf_len, "LD"); - buf += ret; - blen -= ret; - if (payload & 0x2) { - if (payload & 0x4) { - ret = snprintf(buf, buf_len, " AT"); - buf += ret; - blen -= ret; - } - if (payload & 0x8) { - ret = snprintf(buf, buf_len, " EXCL"); - buf += ret; - blen -= ret; - } - if (payload & 0x10) { - ret = snprintf(buf, buf_len, " AR"); - buf += ret; - blen -= ret; - } - } else if (payload & 0x4) { - ret = snprintf(buf, buf_len, " SIMD-FP"); - buf += ret; - blen -= ret; - } - if (ret < 0) - return ret; - blen -= ret; - return buf_len - blen; - } - case 2: { - size_t blen = buf_len; - - ret = snprintf(buf, buf_len, "B"); - buf += ret; - blen -= ret; - if (payload & 0x1) { - ret = snprintf(buf, buf_len, " COND"); - buf += ret; - blen -= ret; - } - if (payload & 0x2) { - ret = snprintf(buf, buf_len, " IND"); - buf += ret; - blen -= ret; - } - if (ret < 0) - return ret; - blen -= ret; - return buf_len - blen; - } - default: return 0; - } - case ARM_SPE_DATA_SOURCE: - case ARM_SPE_TIMESTAMP: - return snprintf(buf, buf_len, "%s %lld", name, payload); - case ARM_SPE_ADDRESS: - switch (idx) { - case 0: - case 1: ns = !!(packet->payload & NS_FLAG); - el = (packet->payload & EL_FLAG) >> 61; - payload &= ~(0xffULL << 56); - return snprintf(buf, buf_len, "%s 0x%llx el%d ns=%d", - (idx == 1) ? "TGT" : "PC", payload, el, ns); - case 2: return snprintf(buf, buf_len, "VA 0x%llx", payload); - case 3: ns = !!(packet->payload & NS_FLAG); - payload &= ~(0xffULL << 56); - return snprintf(buf, buf_len, "PA 0x%llx ns=%d", - payload, ns); - default: return 0; - } - case ARM_SPE_CONTEXT: - return snprintf(buf, buf_len, "%s 0x%lx el%d", name, - (unsigned long)payload, idx + 1); - case ARM_SPE_COUNTER: { - size_t blen = buf_len; - - ret = snprintf(buf, buf_len, "%s %d ", name, - (unsigned short)payload); - buf += ret; - blen -= ret; - switch (idx) { - case 0: ret = snprintf(buf, buf_len, "TOT"); break; - case 1: ret = snprintf(buf, buf_len, "ISSUE"); break; - case 2: ret = snprintf(buf, buf_len, "XLAT"); break; - default: ret = 0; - } - if (ret < 0) - return ret; - blen -= ret; - return buf_len - blen; - } - default: - break; - } - - return snprintf(buf, buf_len, "%s 0x%llx (%d)", - name, payload, packet->index); -} |