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-rw-r--r--tools/perf/util/intel-pt-decoder/Build20
-rw-r--r--tools/perf/util/intel-pt-decoder/intel-pt-decoder.c3331
-rw-r--r--tools/perf/util/intel-pt-decoder/intel-pt-decoder.h273
-rw-r--r--tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.c273
-rw-r--r--tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.h54
-rw-r--r--tools/perf/util/intel-pt-decoder/intel-pt-log.c152
-rw-r--r--tools/perf/util/intel-pt-decoder/intel-pt-log.h70
-rw-r--r--tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c763
-rw-r--r--tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.h87
9 files changed, 5023 insertions, 0 deletions
diff --git a/tools/perf/util/intel-pt-decoder/Build b/tools/perf/util/intel-pt-decoder/Build
new file mode 100644
index 000000000..bc6293598
--- /dev/null
+++ b/tools/perf/util/intel-pt-decoder/Build
@@ -0,0 +1,20 @@
+perf-$(CONFIG_AUXTRACE) += intel-pt-pkt-decoder.o intel-pt-insn-decoder.o intel-pt-log.o intel-pt-decoder.o
+
+inat_tables_script = $(srctree)/tools/arch/x86/tools/gen-insn-attr-x86.awk
+inat_tables_maps = $(srctree)/tools/arch/x86/lib/x86-opcode-map.txt
+
+$(OUTPUT)util/intel-pt-decoder/inat-tables.c: $(inat_tables_script) $(inat_tables_maps)
+ $(call rule_mkdir)
+ @$(call echo-cmd,gen)$(AWK) -f $(inat_tables_script) $(inat_tables_maps) > $@ || rm -f $@
+
+# Busybox's diff doesn't have -I, avoid warning in the case
+
+$(OUTPUT)util/intel-pt-decoder/intel-pt-insn-decoder.o: util/intel-pt-decoder/intel-pt-insn-decoder.c $(OUTPUT)util/intel-pt-decoder/inat-tables.c
+ $(call rule_mkdir)
+ $(call if_changed_dep,cc_o_c)
+
+CFLAGS_intel-pt-insn-decoder.o += -I$(OUTPUT)util/intel-pt-decoder
+
+ifeq ($(CC_NO_CLANG), 1)
+ CFLAGS_intel-pt-insn-decoder.o += -Wno-override-init
+endif
diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
new file mode 100644
index 000000000..48fda1a19
--- /dev/null
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
@@ -0,0 +1,3331 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * intel_pt_decoder.c: Intel Processor Trace support
+ * Copyright (c) 2013-2014, Intel Corporation.
+ */
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+#include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+#include <errno.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <linux/compiler.h>
+#include <linux/string.h>
+#include <linux/zalloc.h>
+
+#include "../auxtrace.h"
+
+#include "intel-pt-insn-decoder.h"
+#include "intel-pt-pkt-decoder.h"
+#include "intel-pt-decoder.h"
+#include "intel-pt-log.h"
+
+#define BITULL(x) (1ULL << (x))
+
+/* IA32_RTIT_CTL MSR bits */
+#define INTEL_PT_CYC_ENABLE BITULL(1)
+#define INTEL_PT_CYC_THRESHOLD (BITULL(22) | BITULL(21) | BITULL(20) | BITULL(19))
+#define INTEL_PT_CYC_THRESHOLD_SHIFT 19
+
+#define INTEL_PT_BLK_SIZE 1024
+
+#define BIT63 (((uint64_t)1 << 63))
+
+#define INTEL_PT_RETURN 1
+
+/* Maximum number of loops with no packets consumed i.e. stuck in a loop */
+#define INTEL_PT_MAX_LOOPS 10000
+
+struct intel_pt_blk {
+ struct intel_pt_blk *prev;
+ uint64_t ip[INTEL_PT_BLK_SIZE];
+};
+
+struct intel_pt_stack {
+ struct intel_pt_blk *blk;
+ struct intel_pt_blk *spare;
+ int pos;
+};
+
+enum intel_pt_pkt_state {
+ INTEL_PT_STATE_NO_PSB,
+ INTEL_PT_STATE_NO_IP,
+ INTEL_PT_STATE_ERR_RESYNC,
+ INTEL_PT_STATE_IN_SYNC,
+ INTEL_PT_STATE_TNT_CONT,
+ INTEL_PT_STATE_TNT,
+ INTEL_PT_STATE_TIP,
+ INTEL_PT_STATE_TIP_PGD,
+ INTEL_PT_STATE_FUP,
+ INTEL_PT_STATE_FUP_NO_TIP,
+ INTEL_PT_STATE_RESAMPLE,
+};
+
+static inline bool intel_pt_sample_time(enum intel_pt_pkt_state pkt_state)
+{
+ switch (pkt_state) {
+ case INTEL_PT_STATE_NO_PSB:
+ case INTEL_PT_STATE_NO_IP:
+ case INTEL_PT_STATE_ERR_RESYNC:
+ case INTEL_PT_STATE_IN_SYNC:
+ case INTEL_PT_STATE_TNT_CONT:
+ case INTEL_PT_STATE_RESAMPLE:
+ return true;
+ case INTEL_PT_STATE_TNT:
+ case INTEL_PT_STATE_TIP:
+ case INTEL_PT_STATE_TIP_PGD:
+ case INTEL_PT_STATE_FUP:
+ case INTEL_PT_STATE_FUP_NO_TIP:
+ return false;
+ default:
+ return true;
+ };
+}
+
+#ifdef INTEL_PT_STRICT
+#define INTEL_PT_STATE_ERR1 INTEL_PT_STATE_NO_PSB
+#define INTEL_PT_STATE_ERR2 INTEL_PT_STATE_NO_PSB
+#define INTEL_PT_STATE_ERR3 INTEL_PT_STATE_NO_PSB
+#define INTEL_PT_STATE_ERR4 INTEL_PT_STATE_NO_PSB
+#else
+#define INTEL_PT_STATE_ERR1 (decoder->pkt_state)
+#define INTEL_PT_STATE_ERR2 INTEL_PT_STATE_NO_IP
+#define INTEL_PT_STATE_ERR3 INTEL_PT_STATE_ERR_RESYNC
+#define INTEL_PT_STATE_ERR4 INTEL_PT_STATE_IN_SYNC
+#endif
+
+struct intel_pt_decoder {
+ int (*get_trace)(struct intel_pt_buffer *buffer, void *data);
+ int (*walk_insn)(struct intel_pt_insn *intel_pt_insn,
+ uint64_t *insn_cnt_ptr, uint64_t *ip, uint64_t to_ip,
+ uint64_t max_insn_cnt, void *data);
+ bool (*pgd_ip)(uint64_t ip, void *data);
+ int (*lookahead)(void *data, intel_pt_lookahead_cb_t cb, void *cb_data);
+ void *data;
+ struct intel_pt_state state;
+ const unsigned char *buf;
+ size_t len;
+ bool return_compression;
+ bool branch_enable;
+ bool mtc_insn;
+ bool pge;
+ bool have_tma;
+ bool have_cyc;
+ bool fixup_last_mtc;
+ bool have_last_ip;
+ bool in_psb;
+ bool hop;
+ bool hop_psb_fup;
+ bool leap;
+ enum intel_pt_param_flags flags;
+ uint64_t pos;
+ uint64_t last_ip;
+ uint64_t ip;
+ uint64_t cr3;
+ uint64_t timestamp;
+ uint64_t tsc_timestamp;
+ uint64_t ref_timestamp;
+ uint64_t buf_timestamp;
+ uint64_t sample_timestamp;
+ uint64_t ret_addr;
+ uint64_t ctc_timestamp;
+ uint64_t ctc_delta;
+ uint64_t cycle_cnt;
+ uint64_t cyc_ref_timestamp;
+ uint32_t last_mtc;
+ uint32_t tsc_ctc_ratio_n;
+ uint32_t tsc_ctc_ratio_d;
+ uint32_t tsc_ctc_mult;
+ uint32_t tsc_slip;
+ uint32_t ctc_rem_mask;
+ int mtc_shift;
+ struct intel_pt_stack stack;
+ enum intel_pt_pkt_state pkt_state;
+ enum intel_pt_pkt_ctx pkt_ctx;
+ enum intel_pt_pkt_ctx prev_pkt_ctx;
+ enum intel_pt_blk_type blk_type;
+ int blk_type_pos;
+ struct intel_pt_pkt packet;
+ struct intel_pt_pkt tnt;
+ int pkt_step;
+ int pkt_len;
+ int last_packet_type;
+ unsigned int cbr;
+ unsigned int cbr_seen;
+ unsigned int max_non_turbo_ratio;
+ double max_non_turbo_ratio_fp;
+ double cbr_cyc_to_tsc;
+ double calc_cyc_to_tsc;
+ bool have_calc_cyc_to_tsc;
+ int exec_mode;
+ unsigned int insn_bytes;
+ uint64_t period;
+ enum intel_pt_period_type period_type;
+ uint64_t tot_insn_cnt;
+ uint64_t period_insn_cnt;
+ uint64_t period_mask;
+ uint64_t period_ticks;
+ uint64_t last_masked_timestamp;
+ uint64_t tot_cyc_cnt;
+ uint64_t sample_tot_cyc_cnt;
+ uint64_t base_cyc_cnt;
+ uint64_t cyc_cnt_timestamp;
+ uint64_t ctl;
+ uint64_t cyc_threshold;
+ double tsc_to_cyc;
+ bool continuous_period;
+ bool overflow;
+ bool set_fup_tx_flags;
+ bool set_fup_ptw;
+ bool set_fup_mwait;
+ bool set_fup_pwre;
+ bool set_fup_exstop;
+ bool set_fup_bep;
+ bool sample_cyc;
+ unsigned int fup_tx_flags;
+ unsigned int tx_flags;
+ uint64_t fup_ptw_payload;
+ uint64_t fup_mwait_payload;
+ uint64_t fup_pwre_payload;
+ uint64_t cbr_payload;
+ uint64_t timestamp_insn_cnt;
+ uint64_t sample_insn_cnt;
+ uint64_t stuck_ip;
+ int no_progress;
+ int stuck_ip_prd;
+ int stuck_ip_cnt;
+ const unsigned char *next_buf;
+ size_t next_len;
+ unsigned char temp_buf[INTEL_PT_PKT_MAX_SZ];
+};
+
+static uint64_t intel_pt_lower_power_of_2(uint64_t x)
+{
+ int i;
+
+ for (i = 0; x != 1; i++)
+ x >>= 1;
+
+ return x << i;
+}
+
+static uint64_t intel_pt_cyc_threshold(uint64_t ctl)
+{
+ if (!(ctl & INTEL_PT_CYC_ENABLE))
+ return 0;
+
+ return (ctl & INTEL_PT_CYC_THRESHOLD) >> INTEL_PT_CYC_THRESHOLD_SHIFT;
+}
+
+static void intel_pt_setup_period(struct intel_pt_decoder *decoder)
+{
+ if (decoder->period_type == INTEL_PT_PERIOD_TICKS) {
+ uint64_t period;
+
+ period = intel_pt_lower_power_of_2(decoder->period);
+ decoder->period_mask = ~(period - 1);
+ decoder->period_ticks = period;
+ }
+}
+
+static uint64_t multdiv(uint64_t t, uint32_t n, uint32_t d)
+{
+ if (!d)
+ return 0;
+ return (t / d) * n + ((t % d) * n) / d;
+}
+
+struct intel_pt_decoder *intel_pt_decoder_new(struct intel_pt_params *params)
+{
+ struct intel_pt_decoder *decoder;
+
+ if (!params->get_trace || !params->walk_insn)
+ return NULL;
+
+ decoder = zalloc(sizeof(struct intel_pt_decoder));
+ if (!decoder)
+ return NULL;
+
+ decoder->get_trace = params->get_trace;
+ decoder->walk_insn = params->walk_insn;
+ decoder->pgd_ip = params->pgd_ip;
+ decoder->lookahead = params->lookahead;
+ decoder->data = params->data;
+ decoder->return_compression = params->return_compression;
+ decoder->branch_enable = params->branch_enable;
+ decoder->hop = params->quick >= 1;
+ decoder->leap = params->quick >= 2;
+
+ decoder->flags = params->flags;
+
+ decoder->ctl = params->ctl;
+ decoder->period = params->period;
+ decoder->period_type = params->period_type;
+
+ decoder->max_non_turbo_ratio = params->max_non_turbo_ratio;
+ decoder->max_non_turbo_ratio_fp = params->max_non_turbo_ratio;
+
+ decoder->cyc_threshold = intel_pt_cyc_threshold(decoder->ctl);
+
+ intel_pt_setup_period(decoder);
+
+ decoder->mtc_shift = params->mtc_period;
+ decoder->ctc_rem_mask = (1 << decoder->mtc_shift) - 1;
+
+ decoder->tsc_ctc_ratio_n = params->tsc_ctc_ratio_n;
+ decoder->tsc_ctc_ratio_d = params->tsc_ctc_ratio_d;
+
+ if (!decoder->tsc_ctc_ratio_n)
+ decoder->tsc_ctc_ratio_d = 0;
+
+ if (decoder->tsc_ctc_ratio_d) {
+ if (!(decoder->tsc_ctc_ratio_n % decoder->tsc_ctc_ratio_d))
+ decoder->tsc_ctc_mult = decoder->tsc_ctc_ratio_n /
+ decoder->tsc_ctc_ratio_d;
+ }
+
+ /*
+ * A TSC packet can slip past MTC packets so that the timestamp appears
+ * to go backwards. One estimate is that can be up to about 40 CPU
+ * cycles, which is certainly less than 0x1000 TSC ticks, but accept
+ * slippage an order of magnitude more to be on the safe side.
+ */
+ decoder->tsc_slip = 0x10000;
+
+ intel_pt_log("timestamp: mtc_shift %u\n", decoder->mtc_shift);
+ intel_pt_log("timestamp: tsc_ctc_ratio_n %u\n", decoder->tsc_ctc_ratio_n);
+ intel_pt_log("timestamp: tsc_ctc_ratio_d %u\n", decoder->tsc_ctc_ratio_d);
+ intel_pt_log("timestamp: tsc_ctc_mult %u\n", decoder->tsc_ctc_mult);
+ intel_pt_log("timestamp: tsc_slip %#x\n", decoder->tsc_slip);
+
+ if (decoder->hop)
+ intel_pt_log("Hop mode: decoding FUP and TIPs, but not TNT\n");
+
+ return decoder;
+}
+
+static void intel_pt_pop_blk(struct intel_pt_stack *stack)
+{
+ struct intel_pt_blk *blk = stack->blk;
+
+ stack->blk = blk->prev;
+ if (!stack->spare)
+ stack->spare = blk;
+ else
+ free(blk);
+}
+
+static uint64_t intel_pt_pop(struct intel_pt_stack *stack)
+{
+ if (!stack->pos) {
+ if (!stack->blk)
+ return 0;
+ intel_pt_pop_blk(stack);
+ if (!stack->blk)
+ return 0;
+ stack->pos = INTEL_PT_BLK_SIZE;
+ }
+ return stack->blk->ip[--stack->pos];
+}
+
+static int intel_pt_alloc_blk(struct intel_pt_stack *stack)
+{
+ struct intel_pt_blk *blk;
+
+ if (stack->spare) {
+ blk = stack->spare;
+ stack->spare = NULL;
+ } else {
+ blk = malloc(sizeof(struct intel_pt_blk));
+ if (!blk)
+ return -ENOMEM;
+ }
+
+ blk->prev = stack->blk;
+ stack->blk = blk;
+ stack->pos = 0;
+ return 0;
+}
+
+static int intel_pt_push(struct intel_pt_stack *stack, uint64_t ip)
+{
+ int err;
+
+ if (!stack->blk || stack->pos == INTEL_PT_BLK_SIZE) {
+ err = intel_pt_alloc_blk(stack);
+ if (err)
+ return err;
+ }
+
+ stack->blk->ip[stack->pos++] = ip;
+ return 0;
+}
+
+static void intel_pt_clear_stack(struct intel_pt_stack *stack)
+{
+ while (stack->blk)
+ intel_pt_pop_blk(stack);
+ stack->pos = 0;
+}
+
+static void intel_pt_free_stack(struct intel_pt_stack *stack)
+{
+ intel_pt_clear_stack(stack);
+ zfree(&stack->blk);
+ zfree(&stack->spare);
+}
+
+void intel_pt_decoder_free(struct intel_pt_decoder *decoder)
+{
+ intel_pt_free_stack(&decoder->stack);
+ free(decoder);
+}
+
+static int intel_pt_ext_err(int code)
+{
+ switch (code) {
+ case -ENOMEM:
+ return INTEL_PT_ERR_NOMEM;
+ case -ENOSYS:
+ return INTEL_PT_ERR_INTERN;
+ case -EBADMSG:
+ return INTEL_PT_ERR_BADPKT;
+ case -ENODATA:
+ return INTEL_PT_ERR_NODATA;
+ case -EILSEQ:
+ return INTEL_PT_ERR_NOINSN;
+ case -ENOENT:
+ return INTEL_PT_ERR_MISMAT;
+ case -EOVERFLOW:
+ return INTEL_PT_ERR_OVR;
+ case -ENOSPC:
+ return INTEL_PT_ERR_LOST;
+ case -ELOOP:
+ return INTEL_PT_ERR_NELOOP;
+ default:
+ return INTEL_PT_ERR_UNK;
+ }
+}
+
+static const char *intel_pt_err_msgs[] = {
+ [INTEL_PT_ERR_NOMEM] = "Memory allocation failed",
+ [INTEL_PT_ERR_INTERN] = "Internal error",
+ [INTEL_PT_ERR_BADPKT] = "Bad packet",
+ [INTEL_PT_ERR_NODATA] = "No more data",
+ [INTEL_PT_ERR_NOINSN] = "Failed to get instruction",
+ [INTEL_PT_ERR_MISMAT] = "Trace doesn't match instruction",
+ [INTEL_PT_ERR_OVR] = "Overflow packet",
+ [INTEL_PT_ERR_LOST] = "Lost trace data",
+ [INTEL_PT_ERR_UNK] = "Unknown error!",
+ [INTEL_PT_ERR_NELOOP] = "Never-ending loop",
+};
+
+int intel_pt__strerror(int code, char *buf, size_t buflen)
+{
+ if (code < 1 || code >= INTEL_PT_ERR_MAX)
+ code = INTEL_PT_ERR_UNK;
+ strlcpy(buf, intel_pt_err_msgs[code], buflen);
+ return 0;
+}
+
+static uint64_t intel_pt_calc_ip(const struct intel_pt_pkt *packet,
+ uint64_t last_ip)
+{
+ uint64_t ip;
+
+ switch (packet->count) {
+ case 1:
+ ip = (last_ip & (uint64_t)0xffffffffffff0000ULL) |
+ packet->payload;
+ break;
+ case 2:
+ ip = (last_ip & (uint64_t)0xffffffff00000000ULL) |
+ packet->payload;
+ break;
+ case 3:
+ ip = packet->payload;
+ /* Sign-extend 6-byte ip */
+ if (ip & (uint64_t)0x800000000000ULL)
+ ip |= (uint64_t)0xffff000000000000ULL;
+ break;
+ case 4:
+ ip = (last_ip & (uint64_t)0xffff000000000000ULL) |
+ packet->payload;
+ break;
+ case 6:
+ ip = packet->payload;
+ break;
+ default:
+ return 0;
+ }
+
+ return ip;
+}
+
+static inline void intel_pt_set_last_ip(struct intel_pt_decoder *decoder)
+{
+ decoder->last_ip = intel_pt_calc_ip(&decoder->packet, decoder->last_ip);
+ decoder->have_last_ip = true;
+}
+
+static inline void intel_pt_set_ip(struct intel_pt_decoder *decoder)
+{
+ intel_pt_set_last_ip(decoder);
+ decoder->ip = decoder->last_ip;
+}
+
+static void intel_pt_decoder_log_packet(struct intel_pt_decoder *decoder)
+{
+ intel_pt_log_packet(&decoder->packet, decoder->pkt_len, decoder->pos,
+ decoder->buf);
+}
+
+static int intel_pt_bug(struct intel_pt_decoder *decoder)
+{
+ intel_pt_log("ERROR: Internal error\n");
+ decoder->pkt_state = INTEL_PT_STATE_NO_PSB;
+ return -ENOSYS;
+}
+
+static inline void intel_pt_clear_tx_flags(struct intel_pt_decoder *decoder)
+{
+ decoder->tx_flags = 0;
+}
+
+static inline void intel_pt_update_in_tx(struct intel_pt_decoder *decoder)
+{
+ decoder->tx_flags = decoder->packet.payload & INTEL_PT_IN_TX;
+}
+
+static int intel_pt_bad_packet(struct intel_pt_decoder *decoder)
+{
+ intel_pt_clear_tx_flags(decoder);
+ decoder->have_tma = false;
+ decoder->pkt_len = 1;
+ decoder->pkt_step = 1;
+ intel_pt_decoder_log_packet(decoder);
+ if (decoder->pkt_state != INTEL_PT_STATE_NO_PSB) {
+ intel_pt_log("ERROR: Bad packet\n");
+ decoder->pkt_state = INTEL_PT_STATE_ERR1;
+ }
+ return -EBADMSG;
+}
+
+static inline void intel_pt_update_sample_time(struct intel_pt_decoder *decoder)
+{
+ decoder->sample_timestamp = decoder->timestamp;
+ decoder->sample_insn_cnt = decoder->timestamp_insn_cnt;
+}
+
+static void intel_pt_reposition(struct intel_pt_decoder *decoder)
+{
+ decoder->ip = 0;
+ decoder->pkt_state = INTEL_PT_STATE_NO_PSB;
+ decoder->timestamp = 0;
+ decoder->have_tma = false;
+}
+
+static int intel_pt_get_data(struct intel_pt_decoder *decoder, bool reposition)
+{
+ struct intel_pt_buffer buffer = { .buf = 0, };
+ int ret;
+
+ decoder->pkt_step = 0;
+
+ intel_pt_log("Getting more data\n");
+ ret = decoder->get_trace(&buffer, decoder->data);
+ if (ret)
+ return ret;
+ decoder->buf = buffer.buf;
+ decoder->len = buffer.len;
+ if (!decoder->len) {
+ intel_pt_log("No more data\n");
+ return -ENODATA;
+ }
+ decoder->buf_timestamp = buffer.ref_timestamp;
+ if (!buffer.consecutive || reposition) {
+ intel_pt_reposition(decoder);
+ decoder->ref_timestamp = buffer.ref_timestamp;
+ decoder->state.trace_nr = buffer.trace_nr;
+ intel_pt_log("Reference timestamp 0x%" PRIx64 "\n",
+ decoder->ref_timestamp);
+ return -ENOLINK;
+ }
+
+ return 0;
+}
+
+static int intel_pt_get_next_data(struct intel_pt_decoder *decoder,
+ bool reposition)
+{
+ if (!decoder->next_buf)
+ return intel_pt_get_data(decoder, reposition);
+
+ decoder->buf = decoder->next_buf;
+ decoder->len = decoder->next_len;
+ decoder->next_buf = 0;
+ decoder->next_len = 0;
+ return 0;
+}
+
+static int intel_pt_get_split_packet(struct intel_pt_decoder *decoder)
+{
+ unsigned char *buf = decoder->temp_buf;
+ size_t old_len, len, n;
+ int ret;
+
+ old_len = decoder->len;
+ len = decoder->len;
+ memcpy(buf, decoder->buf, len);
+
+ ret = intel_pt_get_data(decoder, false);
+ if (ret) {
+ decoder->pos += old_len;
+ return ret < 0 ? ret : -EINVAL;
+ }
+
+ n = INTEL_PT_PKT_MAX_SZ - len;
+ if (n > decoder->len)
+ n = decoder->len;
+ memcpy(buf + len, decoder->buf, n);
+ len += n;
+
+ decoder->prev_pkt_ctx = decoder->pkt_ctx;
+ ret = intel_pt_get_packet(buf, len, &decoder->packet, &decoder->pkt_ctx);
+ if (ret < (int)old_len) {
+ decoder->next_buf = decoder->buf;
+ decoder->next_len = decoder->len;
+ decoder->buf = buf;
+ decoder->len = old_len;
+ return intel_pt_bad_packet(decoder);
+ }
+
+ decoder->next_buf = decoder->buf + (ret - old_len);
+ decoder->next_len = decoder->len - (ret - old_len);
+
+ decoder->buf = buf;
+ decoder->len = ret;
+
+ return ret;
+}
+
+struct intel_pt_pkt_info {
+ struct intel_pt_decoder *decoder;
+ struct intel_pt_pkt packet;
+ uint64_t pos;
+ int pkt_len;
+ int last_packet_type;
+ void *data;
+};
+
+typedef int (*intel_pt_pkt_cb_t)(struct intel_pt_pkt_info *pkt_info);
+
+/* Lookahead packets in current buffer */
+static int intel_pt_pkt_lookahead(struct intel_pt_decoder *decoder,
+ intel_pt_pkt_cb_t cb, void *data)
+{
+ struct intel_pt_pkt_info pkt_info;
+ const unsigned char *buf = decoder->buf;
+ enum intel_pt_pkt_ctx pkt_ctx = decoder->pkt_ctx;
+ size_t len = decoder->len;
+ int ret;
+
+ pkt_info.decoder = decoder;
+ pkt_info.pos = decoder->pos;
+ pkt_info.pkt_len = decoder->pkt_step;
+ pkt_info.last_packet_type = decoder->last_packet_type;
+ pkt_info.data = data;
+
+ while (1) {
+ do {
+ pkt_info.pos += pkt_info.pkt_len;
+ buf += pkt_info.pkt_len;
+ len -= pkt_info.pkt_len;
+
+ if (!len)
+ return INTEL_PT_NEED_MORE_BYTES;
+
+ ret = intel_pt_get_packet(buf, len, &pkt_info.packet,
+ &pkt_ctx);
+ if (!ret)
+ return INTEL_PT_NEED_MORE_BYTES;
+ if (ret < 0)
+ return ret;
+
+ pkt_info.pkt_len = ret;
+ } while (pkt_info.packet.type == INTEL_PT_PAD);
+
+ ret = cb(&pkt_info);
+ if (ret)
+ return 0;
+
+ pkt_info.last_packet_type = pkt_info.packet.type;
+ }
+}
+
+struct intel_pt_calc_cyc_to_tsc_info {
+ uint64_t cycle_cnt;
+ unsigned int cbr;
+ uint32_t last_mtc;
+ uint64_t ctc_timestamp;
+ uint64_t ctc_delta;
+ uint64_t tsc_timestamp;
+ uint64_t timestamp;
+ bool have_tma;
+ bool fixup_last_mtc;
+ bool from_mtc;
+ double cbr_cyc_to_tsc;
+};
+
+/*
+ * MTC provides a 8-bit slice of CTC but the TMA packet only provides the lower
+ * 16 bits of CTC. If mtc_shift > 8 then some of the MTC bits are not in the CTC
+ * provided by the TMA packet. Fix-up the last_mtc calculated from the TMA
+ * packet by copying the missing bits from the current MTC assuming the least
+ * difference between the two, and that the current MTC comes after last_mtc.
+ */
+static void intel_pt_fixup_last_mtc(uint32_t mtc, int mtc_shift,
+ uint32_t *last_mtc)
+{
+ uint32_t first_missing_bit = 1U << (16 - mtc_shift);
+ uint32_t mask = ~(first_missing_bit - 1);
+
+ *last_mtc |= mtc & mask;
+ if (*last_mtc >= mtc) {
+ *last_mtc -= first_missing_bit;
+ *last_mtc &= 0xff;
+ }
+}
+
+static int intel_pt_calc_cyc_cb(struct intel_pt_pkt_info *pkt_info)
+{
+ struct intel_pt_decoder *decoder = pkt_info->decoder;
+ struct intel_pt_calc_cyc_to_tsc_info *data = pkt_info->data;
+ uint64_t timestamp;
+ double cyc_to_tsc;
+ unsigned int cbr;
+ uint32_t mtc, mtc_delta, ctc, fc, ctc_rem;
+
+ switch (pkt_info->packet.type) {
+ case INTEL_PT_TNT:
+ case INTEL_PT_TIP_PGE:
+ case INTEL_PT_TIP:
+ case INTEL_PT_FUP:
+ case INTEL_PT_PSB:
+ case INTEL_PT_PIP:
+ case INTEL_PT_MODE_EXEC:
+ case INTEL_PT_MODE_TSX:
+ case INTEL_PT_PSBEND:
+ case INTEL_PT_PAD:
+ case INTEL_PT_VMCS:
+ case INTEL_PT_MNT:
+ case INTEL_PT_PTWRITE:
+ case INTEL_PT_PTWRITE_IP:
+ case INTEL_PT_BBP:
+ case INTEL_PT_BIP:
+ case INTEL_PT_BEP:
+ case INTEL_PT_BEP_IP:
+ return 0;
+
+ case INTEL_PT_MTC:
+ if (!data->have_tma)
+ return 0;
+
+ mtc = pkt_info->packet.payload;
+ if (decoder->mtc_shift > 8 && data->fixup_last_mtc) {
+ data->fixup_last_mtc = false;
+ intel_pt_fixup_last_mtc(mtc, decoder->mtc_shift,
+ &data->last_mtc);
+ }
+ if (mtc > data->last_mtc)
+ mtc_delta = mtc - data->last_mtc;
+ else
+ mtc_delta = mtc + 256 - data->last_mtc;
+ data->ctc_delta += mtc_delta << decoder->mtc_shift;
+ data->last_mtc = mtc;
+
+ if (decoder->tsc_ctc_mult) {
+ timestamp = data->ctc_timestamp +
+ data->ctc_delta * decoder->tsc_ctc_mult;
+ } else {
+ timestamp = data->ctc_timestamp +
+ multdiv(data->ctc_delta,
+ decoder->tsc_ctc_ratio_n,
+ decoder->tsc_ctc_ratio_d);
+ }
+
+ if (timestamp < data->timestamp)
+ return 1;
+
+ if (pkt_info->last_packet_type != INTEL_PT_CYC) {
+ data->timestamp = timestamp;
+ return 0;
+ }
+
+ break;
+
+ case INTEL_PT_TSC:
+ /*
+ * For now, do not support using TSC packets - refer
+ * intel_pt_calc_cyc_to_tsc().
+ */
+ if (data->from_mtc)
+ return 1;
+ timestamp = pkt_info->packet.payload |
+ (data->timestamp & (0xffULL << 56));
+ if (data->from_mtc && timestamp < data->timestamp &&
+ data->timestamp - timestamp < decoder->tsc_slip)
+ return 1;
+ if (timestamp < data->timestamp)
+ timestamp += (1ULL << 56);
+ if (pkt_info->last_packet_type != INTEL_PT_CYC) {
+ if (data->from_mtc)
+ return 1;
+ data->tsc_timestamp = timestamp;
+ data->timestamp = timestamp;
+ return 0;
+ }
+ break;
+
+ case INTEL_PT_TMA:
+ if (data->from_mtc)
+ return 1;
+
+ if (!decoder->tsc_ctc_ratio_d)
+ return 0;
+
+ ctc = pkt_info->packet.payload;
+ fc = pkt_info->packet.count;
+ ctc_rem = ctc & decoder->ctc_rem_mask;
+
+ data->last_mtc = (ctc >> decoder->mtc_shift) & 0xff;
+
+ data->ctc_timestamp = data->tsc_timestamp - fc;
+ if (decoder->tsc_ctc_mult) {
+ data->ctc_timestamp -= ctc_rem * decoder->tsc_ctc_mult;
+ } else {
+ data->ctc_timestamp -=
+ multdiv(ctc_rem, decoder->tsc_ctc_ratio_n,
+ decoder->tsc_ctc_ratio_d);
+ }
+
+ data->ctc_delta = 0;
+ data->have_tma = true;
+ data->fixup_last_mtc = true;
+
+ return 0;
+
+ case INTEL_PT_CYC:
+ data->cycle_cnt += pkt_info->packet.payload;
+ return 0;
+
+ case INTEL_PT_CBR:
+ cbr = pkt_info->packet.payload;
+ if (data->cbr && data->cbr != cbr)
+ return 1;
+ data->cbr = cbr;
+ data->cbr_cyc_to_tsc = decoder->max_non_turbo_ratio_fp / cbr;
+ return 0;
+
+ case INTEL_PT_TIP_PGD:
+ case INTEL_PT_TRACESTOP:
+ case INTEL_PT_EXSTOP:
+ case INTEL_PT_EXSTOP_IP:
+ case INTEL_PT_MWAIT:
+ case INTEL_PT_PWRE:
+ case INTEL_PT_PWRX:
+ case INTEL_PT_OVF:
+ case INTEL_PT_BAD: /* Does not happen */
+ default:
+ return 1;
+ }
+
+ if (!data->cbr && decoder->cbr) {
+ data->cbr = decoder->cbr;
+ data->cbr_cyc_to_tsc = decoder->cbr_cyc_to_tsc;
+ }
+
+ if (!data->cycle_cnt)
+ return 1;
+
+ cyc_to_tsc = (double)(timestamp - decoder->timestamp) / data->cycle_cnt;
+
+ if (data->cbr && cyc_to_tsc > data->cbr_cyc_to_tsc &&
+ cyc_to_tsc / data->cbr_cyc_to_tsc > 1.25) {
+ intel_pt_log("Timestamp: calculated %g TSC ticks per cycle too big (c.f. CBR-based value %g), pos " x64_fmt "\n",
+ cyc_to_tsc, data->cbr_cyc_to_tsc, pkt_info->pos);
+ return 1;
+ }
+
+ decoder->calc_cyc_to_tsc = cyc_to_tsc;
+ decoder->have_calc_cyc_to_tsc = true;
+
+ if (data->cbr) {
+ intel_pt_log("Timestamp: calculated %g TSC ticks per cycle c.f. CBR-based value %g, pos " x64_fmt "\n",
+ cyc_to_tsc, data->cbr_cyc_to_tsc, pkt_info->pos);
+ } else {
+ intel_pt_log("Timestamp: calculated %g TSC ticks per cycle c.f. unknown CBR-based value, pos " x64_fmt "\n",
+ cyc_to_tsc, pkt_info->pos);
+ }
+
+ return 1;
+}
+
+static void intel_pt_calc_cyc_to_tsc(struct intel_pt_decoder *decoder,
+ bool from_mtc)
+{
+ struct intel_pt_calc_cyc_to_tsc_info data = {
+ .cycle_cnt = 0,
+ .cbr = 0,
+ .last_mtc = decoder->last_mtc,
+ .ctc_timestamp = decoder->ctc_timestamp,
+ .ctc_delta = decoder->ctc_delta,
+ .tsc_timestamp = decoder->tsc_timestamp,
+ .timestamp = decoder->timestamp,
+ .have_tma = decoder->have_tma,
+ .fixup_last_mtc = decoder->fixup_last_mtc,
+ .from_mtc = from_mtc,
+ .cbr_cyc_to_tsc = 0,
+ };
+
+ /*
+ * For now, do not support using TSC packets for at least the reasons:
+ * 1) timing might have stopped
+ * 2) TSC packets within PSB+ can slip against CYC packets
+ */
+ if (!from_mtc)
+ return;
+
+ intel_pt_pkt_lookahead(decoder, intel_pt_calc_cyc_cb, &data);
+}
+
+static int intel_pt_get_next_packet(struct intel_pt_decoder *decoder)
+{
+ int ret;
+
+ decoder->last_packet_type = decoder->packet.type;
+
+ do {
+ decoder->pos += decoder->pkt_step;
+ decoder->buf += decoder->pkt_step;
+ decoder->len -= decoder->pkt_step;
+
+ if (!decoder->len) {
+ ret = intel_pt_get_next_data(decoder, false);
+ if (ret)
+ return ret;
+ }
+
+ decoder->prev_pkt_ctx = decoder->pkt_ctx;
+ ret = intel_pt_get_packet(decoder->buf, decoder->len,
+ &decoder->packet, &decoder->pkt_ctx);
+ if (ret == INTEL_PT_NEED_MORE_BYTES && BITS_PER_LONG == 32 &&
+ decoder->len < INTEL_PT_PKT_MAX_SZ && !decoder->next_buf) {
+ ret = intel_pt_get_split_packet(decoder);
+ if (ret < 0)
+ return ret;
+ }
+ if (ret <= 0)
+ return intel_pt_bad_packet(decoder);
+
+ decoder->pkt_len = ret;
+ decoder->pkt_step = ret;
+ intel_pt_decoder_log_packet(decoder);
+ } while (decoder->packet.type == INTEL_PT_PAD);
+
+ return 0;
+}
+
+static uint64_t intel_pt_next_period(struct intel_pt_decoder *decoder)
+{
+ uint64_t timestamp, masked_timestamp;
+
+ timestamp = decoder->timestamp + decoder->timestamp_insn_cnt;
+ masked_timestamp = timestamp & decoder->period_mask;
+ if (decoder->continuous_period) {
+ if (masked_timestamp > decoder->last_masked_timestamp)
+ return 1;
+ } else {
+ timestamp += 1;
+ masked_timestamp = timestamp & decoder->period_mask;
+ if (masked_timestamp > decoder->last_masked_timestamp) {
+ decoder->last_masked_timestamp = masked_timestamp;
+ decoder->continuous_period = true;
+ }
+ }
+
+ if (masked_timestamp < decoder->last_masked_timestamp)
+ return decoder->period_ticks;
+
+ return decoder->period_ticks - (timestamp - masked_timestamp);
+}
+
+static uint64_t intel_pt_next_sample(struct intel_pt_decoder *decoder)
+{
+ switch (decoder->period_type) {
+ case INTEL_PT_PERIOD_INSTRUCTIONS:
+ return decoder->period - decoder->period_insn_cnt;
+ case INTEL_PT_PERIOD_TICKS:
+ return intel_pt_next_period(decoder);
+ case INTEL_PT_PERIOD_NONE:
+ case INTEL_PT_PERIOD_MTC:
+ default:
+ return 0;
+ }
+}
+
+static void intel_pt_sample_insn(struct intel_pt_decoder *decoder)
+{
+ uint64_t timestamp, masked_timestamp;
+
+ switch (decoder->period_type) {
+ case INTEL_PT_PERIOD_INSTRUCTIONS:
+ decoder->period_insn_cnt = 0;
+ break;
+ case INTEL_PT_PERIOD_TICKS:
+ timestamp = decoder->timestamp + decoder->timestamp_insn_cnt;
+ masked_timestamp = timestamp & decoder->period_mask;
+ if (masked_timestamp > decoder->last_masked_timestamp)
+ decoder->last_masked_timestamp = masked_timestamp;
+ else
+ decoder->last_masked_timestamp += decoder->period_ticks;
+ break;
+ case INTEL_PT_PERIOD_NONE:
+ case INTEL_PT_PERIOD_MTC:
+ default:
+ break;
+ }
+
+ decoder->state.type |= INTEL_PT_INSTRUCTION;
+}
+
+static int intel_pt_walk_insn(struct intel_pt_decoder *decoder,
+ struct intel_pt_insn *intel_pt_insn, uint64_t ip)
+{
+ uint64_t max_insn_cnt, insn_cnt = 0;
+ int err;
+
+ if (!decoder->mtc_insn)
+ decoder->mtc_insn = true;
+
+ max_insn_cnt = intel_pt_next_sample(decoder);
+
+ err = decoder->walk_insn(intel_pt_insn, &insn_cnt, &decoder->ip, ip,
+ max_insn_cnt, decoder->data);
+
+ decoder->tot_insn_cnt += insn_cnt;
+ decoder->timestamp_insn_cnt += insn_cnt;
+ decoder->sample_insn_cnt += insn_cnt;
+ decoder->period_insn_cnt += insn_cnt;
+
+ if (err) {
+ decoder->no_progress = 0;
+ decoder->pkt_state = INTEL_PT_STATE_ERR2;
+ intel_pt_log_at("ERROR: Failed to get instruction",
+ decoder->ip);
+ if (err == -ENOENT)
+ return -ENOLINK;
+ return -EILSEQ;
+ }
+
+ if (ip && decoder->ip == ip) {
+ err = -EAGAIN;
+ goto out;
+ }
+
+ if (max_insn_cnt && insn_cnt >= max_insn_cnt)
+ intel_pt_sample_insn(decoder);
+
+ if (intel_pt_insn->branch == INTEL_PT_BR_NO_BRANCH) {
+ decoder->state.type = INTEL_PT_INSTRUCTION;
+ decoder->state.from_ip = decoder->ip;
+ decoder->state.to_ip = 0;
+ decoder->ip += intel_pt_insn->length;
+ err = INTEL_PT_RETURN;
+ goto out;
+ }
+
+ if (intel_pt_insn->op == INTEL_PT_OP_CALL) {
+ /* Zero-length calls are excluded */
+ if (intel_pt_insn->branch != INTEL_PT_BR_UNCONDITIONAL ||
+ intel_pt_insn->rel) {
+ err = intel_pt_push(&decoder->stack, decoder->ip +
+ intel_pt_insn->length);
+ if (err)
+ goto out;
+ }
+ } else if (intel_pt_insn->op == INTEL_PT_OP_RET) {
+ decoder->ret_addr = intel_pt_pop(&decoder->stack);
+ }
+
+ if (intel_pt_insn->branch == INTEL_PT_BR_UNCONDITIONAL) {
+ int cnt = decoder->no_progress++;
+
+ decoder->state.from_ip = decoder->ip;
+ decoder->ip += intel_pt_insn->length +
+ intel_pt_insn->rel;
+ decoder->state.to_ip = decoder->ip;
+ err = INTEL_PT_RETURN;
+
+ /*
+ * Check for being stuck in a loop. This can happen if a
+ * decoder error results in the decoder erroneously setting the
+ * ip to an address that is itself in an infinite loop that
+ * consumes no packets. When that happens, there must be an
+ * unconditional branch.
+ */
+ if (cnt) {
+ if (cnt == 1) {
+ decoder->stuck_ip = decoder->state.to_ip;
+ decoder->stuck_ip_prd = 1;
+ decoder->stuck_ip_cnt = 1;
+ } else if (cnt > INTEL_PT_MAX_LOOPS ||
+ decoder->state.to_ip == decoder->stuck_ip) {
+ intel_pt_log_at("ERROR: Never-ending loop",
+ decoder->state.to_ip);
+ decoder->pkt_state = INTEL_PT_STATE_ERR_RESYNC;
+ err = -ELOOP;
+ goto out;
+ } else if (!--decoder->stuck_ip_cnt) {
+ decoder->stuck_ip_prd += 1;
+ decoder->stuck_ip_cnt = decoder->stuck_ip_prd;
+ decoder->stuck_ip = decoder->state.to_ip;
+ }
+ }
+ goto out_no_progress;
+ }
+out:
+ decoder->no_progress = 0;
+out_no_progress:
+ decoder->state.insn_op = intel_pt_insn->op;
+ decoder->state.insn_len = intel_pt_insn->length;
+ memcpy(decoder->state.insn, intel_pt_insn->buf,
+ INTEL_PT_INSN_BUF_SZ);
+
+ if (decoder->tx_flags & INTEL_PT_IN_TX)
+ decoder->state.flags |= INTEL_PT_IN_TX;
+
+ return err;
+}
+
+static bool intel_pt_fup_event(struct intel_pt_decoder *decoder)
+{
+ enum intel_pt_sample_type type = decoder->state.type;
+ bool ret = false;
+
+ decoder->state.type &= ~INTEL_PT_BRANCH;
+
+ if (decoder->set_fup_tx_flags) {
+ decoder->set_fup_tx_flags = false;
+ decoder->tx_flags = decoder->fup_tx_flags;
+ decoder->state.type |= INTEL_PT_TRANSACTION;
+ if (decoder->fup_tx_flags & INTEL_PT_ABORT_TX)
+ decoder->state.type |= INTEL_PT_BRANCH;
+ decoder->state.flags = decoder->fup_tx_flags;
+ ret = true;
+ }
+ if (decoder->set_fup_ptw) {
+ decoder->set_fup_ptw = false;
+ decoder->state.type |= INTEL_PT_PTW;
+ decoder->state.flags |= INTEL_PT_FUP_IP;
+ decoder->state.ptw_payload = decoder->fup_ptw_payload;
+ ret = true;
+ }
+ if (decoder->set_fup_mwait) {
+ decoder->set_fup_mwait = false;
+ decoder->state.type |= INTEL_PT_MWAIT_OP;
+ decoder->state.mwait_payload = decoder->fup_mwait_payload;
+ ret = true;
+ }
+ if (decoder->set_fup_pwre) {
+ decoder->set_fup_pwre = false;
+ decoder->state.type |= INTEL_PT_PWR_ENTRY;
+ decoder->state.pwre_payload = decoder->fup_pwre_payload;
+ ret = true;
+ }
+ if (decoder->set_fup_exstop) {
+ decoder->set_fup_exstop = false;
+ decoder->state.type |= INTEL_PT_EX_STOP;
+ decoder->state.flags |= INTEL_PT_FUP_IP;
+ ret = true;
+ }
+ if (decoder->set_fup_bep) {
+ decoder->set_fup_bep = false;
+ decoder->state.type |= INTEL_PT_BLK_ITEMS;
+ ret = true;
+ }
+ if (decoder->overflow) {
+ decoder->overflow = false;
+ if (!ret && !decoder->pge) {
+ if (decoder->hop) {
+ decoder->state.type = 0;
+ decoder->pkt_state = INTEL_PT_STATE_RESAMPLE;
+ }
+ decoder->pge = true;
+ decoder->state.type |= INTEL_PT_BRANCH | INTEL_PT_TRACE_BEGIN;
+ decoder->state.from_ip = 0;
+ decoder->state.to_ip = decoder->ip;
+ return true;
+ }
+ }
+ if (ret) {
+ decoder->state.from_ip = decoder->ip;
+ decoder->state.to_ip = 0;
+ } else {
+ decoder->state.type = type;
+ }
+ return ret;
+}
+
+static inline bool intel_pt_fup_with_nlip(struct intel_pt_decoder *decoder,
+ struct intel_pt_insn *intel_pt_insn,
+ uint64_t ip, int err)
+{
+ return decoder->flags & INTEL_PT_FUP_WITH_NLIP && !err &&
+ intel_pt_insn->branch == INTEL_PT_BR_INDIRECT &&
+ ip == decoder->ip + intel_pt_insn->length;
+}
+
+static int intel_pt_walk_fup(struct intel_pt_decoder *decoder)
+{
+ struct intel_pt_insn intel_pt_insn;
+ uint64_t ip;
+ int err;
+
+ ip = decoder->last_ip;
+
+ while (1) {
+ err = intel_pt_walk_insn(decoder, &intel_pt_insn, ip);
+ if (err == INTEL_PT_RETURN)
+ return 0;
+ if (err == -EAGAIN ||
+ intel_pt_fup_with_nlip(decoder, &intel_pt_insn, ip, err)) {
+ bool no_tip = decoder->pkt_state != INTEL_PT_STATE_FUP;
+
+ decoder->pkt_state = INTEL_PT_STATE_IN_SYNC;
+ if (intel_pt_fup_event(decoder) && no_tip)
+ return 0;
+ return -EAGAIN;
+ }
+ decoder->set_fup_tx_flags = false;
+ if (err)
+ return err;
+
+ if (intel_pt_insn.branch == INTEL_PT_BR_INDIRECT) {
+ intel_pt_log_at("ERROR: Unexpected indirect branch",
+ decoder->ip);
+ decoder->pkt_state = INTEL_PT_STATE_ERR_RESYNC;
+ return -ENOENT;
+ }
+
+ if (intel_pt_insn.branch == INTEL_PT_BR_CONDITIONAL) {
+ intel_pt_log_at("ERROR: Unexpected conditional branch",
+ decoder->ip);
+ decoder->pkt_state = INTEL_PT_STATE_ERR_RESYNC;
+ return -ENOENT;
+ }
+
+ intel_pt_bug(decoder);
+ }
+}
+
+static int intel_pt_walk_tip(struct intel_pt_decoder *decoder)
+{
+ struct intel_pt_insn intel_pt_insn;
+ int err;
+
+ err = intel_pt_walk_insn(decoder, &intel_pt_insn, 0);
+ if (err == INTEL_PT_RETURN &&
+ decoder->pgd_ip &&
+ decoder->pkt_state == INTEL_PT_STATE_TIP_PGD &&
+ (decoder->state.type & INTEL_PT_BRANCH) &&
+ decoder->pgd_ip(decoder->state.to_ip, decoder->data)) {
+ /* Unconditional branch leaving filter region */
+ decoder->no_progress = 0;
+ decoder->pge = false;
+ decoder->continuous_period = false;
+ decoder->pkt_state = INTEL_PT_STATE_IN_SYNC;
+ decoder->state.type |= INTEL_PT_TRACE_END;
+ return 0;
+ }
+ if (err == INTEL_PT_RETURN)
+ return 0;
+ if (err)
+ return err;
+
+ if (intel_pt_insn.branch == INTEL_PT_BR_INDIRECT) {
+ if (decoder->pkt_state == INTEL_PT_STATE_TIP_PGD) {
+ decoder->pge = false;
+ decoder->continuous_period = false;
+ decoder->pkt_state = INTEL_PT_STATE_IN_SYNC;
+ decoder->state.from_ip = decoder->ip;
+ if (decoder->packet.count == 0) {
+ decoder->state.to_ip = 0;
+ } else {
+ decoder->state.to_ip = decoder->last_ip;
+ decoder->ip = decoder->last_ip;
+ }
+ decoder->state.type |= INTEL_PT_TRACE_END;
+ } else {
+ decoder->pkt_state = INTEL_PT_STATE_IN_SYNC;
+ decoder->state.from_ip = decoder->ip;
+ if (decoder->packet.count == 0) {
+ decoder->state.to_ip = 0;
+ } else {
+ decoder->state.to_ip = decoder->last_ip;
+ decoder->ip = decoder->last_ip;
+ }
+ }
+ return 0;
+ }
+
+ if (intel_pt_insn.branch == INTEL_PT_BR_CONDITIONAL) {
+ uint64_t to_ip = decoder->ip + intel_pt_insn.length +
+ intel_pt_insn.rel;
+
+ if (decoder->pgd_ip &&
+ decoder->pkt_state == INTEL_PT_STATE_TIP_PGD &&
+ decoder->pgd_ip(to_ip, decoder->data)) {
+ /* Conditional branch leaving filter region */
+ decoder->pge = false;
+ decoder->continuous_period = false;
+ decoder->pkt_state = INTEL_PT_STATE_IN_SYNC;
+ decoder->ip = to_ip;
+ decoder->state.from_ip = decoder->ip;
+ decoder->state.to_ip = to_ip;
+ decoder->state.type |= INTEL_PT_TRACE_END;
+ return 0;
+ }
+ intel_pt_log_at("ERROR: Conditional branch when expecting indirect branch",
+ decoder->ip);
+ decoder->pkt_state = INTEL_PT_STATE_ERR_RESYNC;
+ return -ENOENT;
+ }
+
+ return intel_pt_bug(decoder);
+}
+
+static int intel_pt_walk_tnt(struct intel_pt_decoder *decoder)
+{
+ struct intel_pt_insn intel_pt_insn;
+ int err;
+
+ while (1) {
+ err = intel_pt_walk_insn(decoder, &intel_pt_insn, 0);
+ if (err == INTEL_PT_RETURN)
+ return 0;
+ if (err)
+ return err;
+
+ if (intel_pt_insn.op == INTEL_PT_OP_RET) {
+ if (!decoder->return_compression) {
+ intel_pt_log_at("ERROR: RET when expecting conditional branch",
+ decoder->ip);
+ decoder->pkt_state = INTEL_PT_STATE_ERR3;
+ return -ENOENT;
+ }
+ if (!decoder->ret_addr) {
+ intel_pt_log_at("ERROR: Bad RET compression (stack empty)",
+ decoder->ip);
+ decoder->pkt_state = INTEL_PT_STATE_ERR3;
+ return -ENOENT;
+ }
+ if (!(decoder->tnt.payload & BIT63)) {
+ intel_pt_log_at("ERROR: Bad RET compression (TNT=N)",
+ decoder->ip);
+ decoder->pkt_state = INTEL_PT_STATE_ERR3;
+ return -ENOENT;
+ }
+ decoder->tnt.count -= 1;
+ if (decoder->tnt.count)
+ decoder->pkt_state = INTEL_PT_STATE_TNT_CONT;
+ else
+ decoder->pkt_state = INTEL_PT_STATE_IN_SYNC;
+ decoder->tnt.payload <<= 1;
+ decoder->state.from_ip = decoder->ip;
+ decoder->ip = decoder->ret_addr;
+ decoder->state.to_ip = decoder->ip;
+ return 0;
+ }
+
+ if (intel_pt_insn.branch == INTEL_PT_BR_INDIRECT) {
+ /* Handle deferred TIPs */
+ err = intel_pt_get_next_packet(decoder);
+ if (err)
+ return err;
+ if (decoder->packet.type != INTEL_PT_TIP ||
+ decoder->packet.count == 0) {
+ intel_pt_log_at("ERROR: Missing deferred TIP for indirect branch",
+ decoder->ip);
+ decoder->pkt_state = INTEL_PT_STATE_ERR3;
+ decoder->pkt_step = 0;
+ return -ENOENT;
+ }
+ intel_pt_set_last_ip(decoder);
+ decoder->state.from_ip = decoder->ip;
+ decoder->state.to_ip = decoder->last_ip;
+ decoder->ip = decoder->last_ip;
+ return 0;
+ }
+
+ if (intel_pt_insn.branch == INTEL_PT_BR_CONDITIONAL) {
+ decoder->tnt.count -= 1;
+ if (decoder->tnt.count)
+ decoder->pkt_state = INTEL_PT_STATE_TNT_CONT;
+ else
+ decoder->pkt_state = INTEL_PT_STATE_IN_SYNC;
+ if (decoder->tnt.payload & BIT63) {
+ decoder->tnt.payload <<= 1;
+ decoder->state.from_ip = decoder->ip;
+ decoder->ip += intel_pt_insn.length +
+ intel_pt_insn.rel;
+ decoder->state.to_ip = decoder->ip;
+ return 0;
+ }
+ /* Instruction sample for a non-taken branch */
+ if (decoder->state.type & INTEL_PT_INSTRUCTION) {
+ decoder->tnt.payload <<= 1;
+ decoder->state.type = INTEL_PT_INSTRUCTION;
+ decoder->state.from_ip = decoder->ip;
+ decoder->state.to_ip = 0;
+ decoder->ip += intel_pt_insn.length;
+ return 0;
+ }
+ decoder->sample_cyc = false;
+ decoder->ip += intel_pt_insn.length;
+ if (!decoder->tnt.count) {
+ intel_pt_update_sample_time(decoder);
+ return -EAGAIN;
+ }
+ decoder->tnt.payload <<= 1;
+ continue;
+ }
+
+ return intel_pt_bug(decoder);
+ }
+}
+
+static int intel_pt_mode_tsx(struct intel_pt_decoder *decoder, bool *no_tip)
+{
+ unsigned int fup_tx_flags;
+ int err;
+
+ fup_tx_flags = decoder->packet.payload &
+ (INTEL_PT_IN_TX | INTEL_PT_ABORT_TX);
+ err = intel_pt_get_next_packet(decoder);
+ if (err)
+ return err;
+ if (decoder->packet.type == INTEL_PT_FUP) {
+ decoder->fup_tx_flags = fup_tx_flags;
+ decoder->set_fup_tx_flags = true;
+ if (!(decoder->fup_tx_flags & INTEL_PT_ABORT_TX))
+ *no_tip = true;
+ } else {
+ intel_pt_log_at("ERROR: Missing FUP after MODE.TSX",
+ decoder->pos);
+ intel_pt_update_in_tx(decoder);
+ }
+ return 0;
+}
+
+static uint64_t intel_pt_8b_tsc(uint64_t timestamp, uint64_t ref_timestamp)
+{
+ timestamp |= (ref_timestamp & (0xffULL << 56));
+
+ if (timestamp < ref_timestamp) {
+ if (ref_timestamp - timestamp > (1ULL << 55))
+ timestamp += (1ULL << 56);
+ } else {
+ if (timestamp - ref_timestamp > (1ULL << 55))
+ timestamp -= (1ULL << 56);
+ }
+
+ return timestamp;
+}
+
+static void intel_pt_calc_tsc_timestamp(struct intel_pt_decoder *decoder)
+{
+ uint64_t timestamp;
+
+ decoder->have_tma = false;
+
+ if (decoder->ref_timestamp) {
+ timestamp = intel_pt_8b_tsc(decoder->packet.payload,
+ decoder->ref_timestamp);
+ decoder->tsc_timestamp = timestamp;
+ decoder->timestamp = timestamp;
+ decoder->ref_timestamp = 0;
+ decoder->timestamp_insn_cnt = 0;
+ } else if (decoder->timestamp) {
+ timestamp = decoder->packet.payload |
+ (decoder->timestamp & (0xffULL << 56));
+ decoder->tsc_timestamp = timestamp;
+ if (timestamp < decoder->timestamp &&
+ decoder->timestamp - timestamp < decoder->tsc_slip) {
+ intel_pt_log_to("Suppressing backwards timestamp",
+ timestamp);
+ timestamp = decoder->timestamp;
+ }
+ if (timestamp < decoder->timestamp) {
+ intel_pt_log_to("Wraparound timestamp", timestamp);
+ timestamp += (1ULL << 56);
+ decoder->tsc_timestamp = timestamp;
+ }
+ decoder->timestamp = timestamp;
+ decoder->timestamp_insn_cnt = 0;
+ }
+
+ if (decoder->last_packet_type == INTEL_PT_CYC) {
+ decoder->cyc_ref_timestamp = decoder->timestamp;
+ decoder->cycle_cnt = 0;
+ decoder->have_calc_cyc_to_tsc = false;
+ intel_pt_calc_cyc_to_tsc(decoder, false);
+ }
+
+ intel_pt_log_to("Setting timestamp", decoder->timestamp);
+}
+
+static int intel_pt_overflow(struct intel_pt_decoder *decoder)
+{
+ intel_pt_log("ERROR: Buffer overflow\n");
+ intel_pt_clear_tx_flags(decoder);
+ decoder->timestamp_insn_cnt = 0;
+ decoder->pkt_state = INTEL_PT_STATE_IN_SYNC;
+ decoder->state.from_ip = decoder->ip;
+ decoder->ip = 0;
+ decoder->pge = false;
+ decoder->set_fup_tx_flags = false;
+ decoder->set_fup_ptw = false;
+ decoder->set_fup_mwait = false;
+ decoder->set_fup_pwre = false;
+ decoder->set_fup_exstop = false;
+ decoder->set_fup_bep = false;
+ decoder->overflow = true;
+ return -EOVERFLOW;
+}
+
+static inline void intel_pt_mtc_cyc_cnt_pge(struct intel_pt_decoder *decoder)
+{
+ if (decoder->have_cyc)
+ return;
+
+ decoder->cyc_cnt_timestamp = decoder->timestamp;
+ decoder->base_cyc_cnt = decoder->tot_cyc_cnt;
+}
+
+static inline void intel_pt_mtc_cyc_cnt_cbr(struct intel_pt_decoder *decoder)
+{
+ decoder->tsc_to_cyc = decoder->cbr / decoder->max_non_turbo_ratio_fp;
+
+ if (decoder->pge)
+ intel_pt_mtc_cyc_cnt_pge(decoder);
+}
+
+static inline void intel_pt_mtc_cyc_cnt_upd(struct intel_pt_decoder *decoder)
+{
+ uint64_t tot_cyc_cnt, tsc_delta;
+
+ if (decoder->have_cyc)
+ return;
+
+ decoder->sample_cyc = true;
+
+ if (!decoder->pge || decoder->timestamp <= decoder->cyc_cnt_timestamp)
+ return;
+
+ tsc_delta = decoder->timestamp - decoder->cyc_cnt_timestamp;
+ tot_cyc_cnt = tsc_delta * decoder->tsc_to_cyc + decoder->base_cyc_cnt;
+
+ if (tot_cyc_cnt > decoder->tot_cyc_cnt)
+ decoder->tot_cyc_cnt = tot_cyc_cnt;
+}
+
+static void intel_pt_calc_tma(struct intel_pt_decoder *decoder)
+{
+ uint32_t ctc = decoder->packet.payload;
+ uint32_t fc = decoder->packet.count;
+ uint32_t ctc_rem = ctc & decoder->ctc_rem_mask;
+
+ if (!decoder->tsc_ctc_ratio_d)
+ return;
+
+ if (decoder->pge && !decoder->in_psb)
+ intel_pt_mtc_cyc_cnt_pge(decoder);
+ else
+ intel_pt_mtc_cyc_cnt_upd(decoder);
+
+ decoder->last_mtc = (ctc >> decoder->mtc_shift) & 0xff;
+ decoder->ctc_timestamp = decoder->tsc_timestamp - fc;
+ if (decoder->tsc_ctc_mult) {
+ decoder->ctc_timestamp -= ctc_rem * decoder->tsc_ctc_mult;
+ } else {
+ decoder->ctc_timestamp -= multdiv(ctc_rem,
+ decoder->tsc_ctc_ratio_n,
+ decoder->tsc_ctc_ratio_d);
+ }
+ decoder->ctc_delta = 0;
+ decoder->have_tma = true;
+ decoder->fixup_last_mtc = true;
+ intel_pt_log("CTC timestamp " x64_fmt " last MTC %#x CTC rem %#x\n",
+ decoder->ctc_timestamp, decoder->last_mtc, ctc_rem);
+}
+
+static void intel_pt_calc_mtc_timestamp(struct intel_pt_decoder *decoder)
+{
+ uint64_t timestamp;
+ uint32_t mtc, mtc_delta;
+
+ if (!decoder->have_tma)
+ return;
+
+ mtc = decoder->packet.payload;
+
+ if (decoder->mtc_shift > 8 && decoder->fixup_last_mtc) {
+ decoder->fixup_last_mtc = false;
+ intel_pt_fixup_last_mtc(mtc, decoder->mtc_shift,
+ &decoder->last_mtc);
+ }
+
+ if (mtc > decoder->last_mtc)
+ mtc_delta = mtc - decoder->last_mtc;
+ else
+ mtc_delta = mtc + 256 - decoder->last_mtc;
+
+ decoder->ctc_delta += mtc_delta << decoder->mtc_shift;
+
+ if (decoder->tsc_ctc_mult) {
+ timestamp = decoder->ctc_timestamp +
+ decoder->ctc_delta * decoder->tsc_ctc_mult;
+ } else {
+ timestamp = decoder->ctc_timestamp +
+ multdiv(decoder->ctc_delta,
+ decoder->tsc_ctc_ratio_n,
+ decoder->tsc_ctc_ratio_d);
+ }
+
+ if (timestamp < decoder->timestamp)
+ intel_pt_log("Suppressing MTC timestamp " x64_fmt " less than current timestamp " x64_fmt "\n",
+ timestamp, decoder->timestamp);
+ else
+ decoder->timestamp = timestamp;
+
+ intel_pt_mtc_cyc_cnt_upd(decoder);
+
+ decoder->timestamp_insn_cnt = 0;
+ decoder->last_mtc = mtc;
+
+ if (decoder->last_packet_type == INTEL_PT_CYC) {
+ decoder->cyc_ref_timestamp = decoder->timestamp;
+ decoder->cycle_cnt = 0;
+ decoder->have_calc_cyc_to_tsc = false;
+ intel_pt_calc_cyc_to_tsc(decoder, true);
+ }
+
+ intel_pt_log_to("Setting timestamp", decoder->timestamp);
+}
+
+static void intel_pt_calc_cbr(struct intel_pt_decoder *decoder)
+{
+ unsigned int cbr = decoder->packet.payload & 0xff;
+
+ decoder->cbr_payload = decoder->packet.payload;
+
+ if (decoder->cbr == cbr)
+ return;
+
+ decoder->cbr = cbr;
+ decoder->cbr_cyc_to_tsc = decoder->max_non_turbo_ratio_fp / cbr;
+ decoder->cyc_ref_timestamp = decoder->timestamp;
+ decoder->cycle_cnt = 0;
+
+ intel_pt_mtc_cyc_cnt_cbr(decoder);
+}
+
+static void intel_pt_calc_cyc_timestamp(struct intel_pt_decoder *decoder)
+{
+ uint64_t timestamp = decoder->cyc_ref_timestamp;
+
+ decoder->have_cyc = true;
+
+ decoder->cycle_cnt += decoder->packet.payload;
+ if (decoder->pge)
+ decoder->tot_cyc_cnt += decoder->packet.payload;
+ decoder->sample_cyc = true;
+
+ if (!decoder->cyc_ref_timestamp)
+ return;
+
+ if (decoder->have_calc_cyc_to_tsc)
+ timestamp += decoder->cycle_cnt * decoder->calc_cyc_to_tsc;
+ else if (decoder->cbr)
+ timestamp += decoder->cycle_cnt * decoder->cbr_cyc_to_tsc;
+ else
+ return;
+
+ if (timestamp < decoder->timestamp)
+ intel_pt_log("Suppressing CYC timestamp " x64_fmt " less than current timestamp " x64_fmt "\n",
+ timestamp, decoder->timestamp);
+ else
+ decoder->timestamp = timestamp;
+
+ decoder->timestamp_insn_cnt = 0;
+
+ intel_pt_log_to("Setting timestamp", decoder->timestamp);
+}
+
+static void intel_pt_bbp(struct intel_pt_decoder *decoder)
+{
+ if (decoder->prev_pkt_ctx == INTEL_PT_NO_CTX) {
+ memset(decoder->state.items.mask, 0, sizeof(decoder->state.items.mask));
+ decoder->state.items.is_32_bit = false;
+ }
+ decoder->blk_type = decoder->packet.payload;
+ decoder->blk_type_pos = intel_pt_blk_type_pos(decoder->blk_type);
+ if (decoder->blk_type == INTEL_PT_GP_REGS)
+ decoder->state.items.is_32_bit = decoder->packet.count;
+ if (decoder->blk_type_pos < 0) {
+ intel_pt_log("WARNING: Unknown block type %u\n",
+ decoder->blk_type);
+ } else if (decoder->state.items.mask[decoder->blk_type_pos]) {
+ intel_pt_log("WARNING: Duplicate block type %u\n",
+ decoder->blk_type);
+ }
+}
+
+static void intel_pt_bip(struct intel_pt_decoder *decoder)
+{
+ uint32_t id = decoder->packet.count;
+ uint32_t bit = 1 << id;
+ int pos = decoder->blk_type_pos;
+
+ if (pos < 0 || id >= INTEL_PT_BLK_ITEM_ID_CNT) {
+ intel_pt_log("WARNING: Unknown block item %u type %d\n",
+ id, decoder->blk_type);
+ return;
+ }
+
+ if (decoder->state.items.mask[pos] & bit) {
+ intel_pt_log("WARNING: Duplicate block item %u type %d\n",
+ id, decoder->blk_type);
+ }
+
+ decoder->state.items.mask[pos] |= bit;
+ decoder->state.items.val[pos][id] = decoder->packet.payload;
+}
+
+/* Walk PSB+ packets when already in sync. */
+static int intel_pt_walk_psbend(struct intel_pt_decoder *decoder)
+{
+ int err;
+
+ decoder->in_psb = true;
+
+ while (1) {
+ err = intel_pt_get_next_packet(decoder);
+ if (err)
+ goto out;
+
+ switch (decoder->packet.type) {
+ case INTEL_PT_PSBEND:
+ err = 0;
+ goto out;
+
+ case INTEL_PT_TIP_PGD:
+ case INTEL_PT_TIP_PGE:
+ case INTEL_PT_TIP:
+ case INTEL_PT_TNT:
+ case INTEL_PT_TRACESTOP:
+ case INTEL_PT_BAD:
+ case INTEL_PT_PSB:
+ case INTEL_PT_PTWRITE:
+ case INTEL_PT_PTWRITE_IP:
+ case INTEL_PT_EXSTOP:
+ case INTEL_PT_EXSTOP_IP:
+ case INTEL_PT_MWAIT:
+ case INTEL_PT_PWRE:
+ case INTEL_PT_PWRX:
+ case INTEL_PT_BBP:
+ case INTEL_PT_BIP:
+ case INTEL_PT_BEP:
+ case INTEL_PT_BEP_IP:
+ decoder->have_tma = false;
+ intel_pt_log("ERROR: Unexpected packet\n");
+ err = -EAGAIN;
+ goto out;
+
+ case INTEL_PT_OVF:
+ err = intel_pt_overflow(decoder);
+ goto out;
+
+ case INTEL_PT_TSC:
+ intel_pt_calc_tsc_timestamp(decoder);
+ break;
+
+ case INTEL_PT_TMA:
+ intel_pt_calc_tma(decoder);
+ break;
+
+ case INTEL_PT_CBR:
+ intel_pt_calc_cbr(decoder);
+ break;
+
+ case INTEL_PT_MODE_EXEC:
+ decoder->exec_mode = decoder->packet.payload;
+ break;
+
+ case INTEL_PT_PIP:
+ decoder->cr3 = decoder->packet.payload & (BIT63 - 1);
+ break;
+
+ case INTEL_PT_FUP:
+ decoder->pge = true;
+ if (decoder->packet.count) {
+ intel_pt_set_last_ip(decoder);
+ if (decoder->hop) {
+ /* Act on FUP at PSBEND */
+ decoder->ip = decoder->last_ip;
+ decoder->hop_psb_fup = true;
+ }
+ }
+ break;
+
+ case INTEL_PT_MODE_TSX:
+ intel_pt_update_in_tx(decoder);
+ break;
+
+ case INTEL_PT_MTC:
+ intel_pt_calc_mtc_timestamp(decoder);
+ if (decoder->period_type == INTEL_PT_PERIOD_MTC)
+ decoder->state.type |= INTEL_PT_INSTRUCTION;
+ break;
+
+ case INTEL_PT_CYC:
+ intel_pt_calc_cyc_timestamp(decoder);
+ break;
+
+ case INTEL_PT_VMCS:
+ case INTEL_PT_MNT:
+ case INTEL_PT_PAD:
+ default:
+ break;
+ }
+ }
+out:
+ decoder->in_psb = false;
+
+ return err;
+}
+
+static int intel_pt_walk_fup_tip(struct intel_pt_decoder *decoder)
+{
+ int err;
+
+ if (decoder->tx_flags & INTEL_PT_ABORT_TX) {
+ decoder->tx_flags = 0;
+ decoder->state.flags &= ~INTEL_PT_IN_TX;
+ decoder->state.flags |= INTEL_PT_ABORT_TX;
+ } else {
+ decoder->state.flags |= INTEL_PT_ASYNC;
+ }
+
+ while (1) {
+ err = intel_pt_get_next_packet(decoder);
+ if (err)
+ return err;
+
+ switch (decoder->packet.type) {
+ case INTEL_PT_TNT:
+ case INTEL_PT_FUP:
+ case INTEL_PT_TRACESTOP:
+ case INTEL_PT_PSB:
+ case INTEL_PT_TSC:
+ case INTEL_PT_TMA:
+ case INTEL_PT_MODE_TSX:
+ case INTEL_PT_BAD:
+ case INTEL_PT_PSBEND:
+ case INTEL_PT_PTWRITE:
+ case INTEL_PT_PTWRITE_IP:
+ case INTEL_PT_EXSTOP:
+ case INTEL_PT_EXSTOP_IP:
+ case INTEL_PT_MWAIT:
+ case INTEL_PT_PWRE:
+ case INTEL_PT_PWRX:
+ case INTEL_PT_BBP:
+ case INTEL_PT_BIP:
+ case INTEL_PT_BEP:
+ case INTEL_PT_BEP_IP:
+ intel_pt_log("ERROR: Missing TIP after FUP\n");
+ decoder->pkt_state = INTEL_PT_STATE_ERR3;
+ decoder->pkt_step = 0;
+ return -ENOENT;
+
+ case INTEL_PT_CBR:
+ intel_pt_calc_cbr(decoder);
+ break;
+
+ case INTEL_PT_OVF:
+ return intel_pt_overflow(decoder);
+
+ case INTEL_PT_TIP_PGD:
+ decoder->state.from_ip = decoder->ip;
+ if (decoder->packet.count == 0) {
+ decoder->state.to_ip = 0;
+ } else {
+ intel_pt_set_ip(decoder);
+ decoder->state.to_ip = decoder->ip;
+ }
+ decoder->pge = false;
+ decoder->continuous_period = false;
+ decoder->state.type |= INTEL_PT_TRACE_END;
+ return 0;
+
+ case INTEL_PT_TIP_PGE:
+ decoder->pge = true;
+ intel_pt_log("Omitting PGE ip " x64_fmt "\n",
+ decoder->ip);
+ decoder->state.from_ip = 0;
+ if (decoder->packet.count == 0) {
+ decoder->state.to_ip = 0;
+ } else {
+ intel_pt_set_ip(decoder);
+ decoder->state.to_ip = decoder->ip;
+ }
+ decoder->state.type |= INTEL_PT_TRACE_BEGIN;
+ intel_pt_mtc_cyc_cnt_pge(decoder);
+ return 0;
+
+ case INTEL_PT_TIP:
+ decoder->state.from_ip = decoder->ip;
+ if (decoder->packet.count == 0) {
+ decoder->state.to_ip = 0;
+ } else {
+ intel_pt_set_ip(decoder);
+ decoder->state.to_ip = decoder->ip;
+ }
+ return 0;
+
+ case INTEL_PT_PIP:
+ decoder->cr3 = decoder->packet.payload & (BIT63 - 1);
+ break;
+
+ case INTEL_PT_MTC:
+ intel_pt_calc_mtc_timestamp(decoder);
+ if (decoder->period_type == INTEL_PT_PERIOD_MTC)
+ decoder->state.type |= INTEL_PT_INSTRUCTION;
+ break;
+
+ case INTEL_PT_CYC:
+ intel_pt_calc_cyc_timestamp(decoder);
+ break;
+
+ case INTEL_PT_MODE_EXEC:
+ decoder->exec_mode = decoder->packet.payload;
+ break;
+
+ case INTEL_PT_VMCS:
+ case INTEL_PT_MNT:
+ case INTEL_PT_PAD:
+ break;
+
+ default:
+ return intel_pt_bug(decoder);
+ }
+ }
+}
+
+static int intel_pt_resample(struct intel_pt_decoder *decoder)
+{
+ decoder->pkt_state = INTEL_PT_STATE_IN_SYNC;
+ decoder->state.type = INTEL_PT_INSTRUCTION;
+ decoder->state.from_ip = decoder->ip;
+ decoder->state.to_ip = 0;
+ return 0;
+}
+
+#define HOP_PROCESS 0
+#define HOP_IGNORE 1
+#define HOP_RETURN 2
+#define HOP_AGAIN 3
+
+static int intel_pt_scan_for_psb(struct intel_pt_decoder *decoder);
+
+/* Hop mode: Ignore TNT, do not walk code, but get ip from FUPs and TIPs */
+static int intel_pt_hop_trace(struct intel_pt_decoder *decoder, bool *no_tip, int *err)
+{
+ *err = 0;
+
+ /* Leap from PSB to PSB, getting ip from FUP within PSB+ */
+ if (decoder->leap && !decoder->in_psb && decoder->packet.type != INTEL_PT_PSB) {
+ *err = intel_pt_scan_for_psb(decoder);
+ if (*err)
+ return HOP_RETURN;
+ }
+
+ switch (decoder->packet.type) {
+ case INTEL_PT_TNT:
+ return HOP_IGNORE;
+
+ case INTEL_PT_TIP_PGD:
+ decoder->pge = false;
+ if (!decoder->packet.count)
+ return HOP_IGNORE;
+ intel_pt_set_ip(decoder);
+ decoder->state.type |= INTEL_PT_TRACE_END;
+ decoder->state.from_ip = 0;
+ decoder->state.to_ip = decoder->ip;
+ return HOP_RETURN;
+
+ case INTEL_PT_TIP:
+ if (!decoder->packet.count)
+ return HOP_IGNORE;
+ intel_pt_set_ip(decoder);
+ decoder->state.type = INTEL_PT_INSTRUCTION;
+ decoder->state.from_ip = decoder->ip;
+ decoder->state.to_ip = 0;
+ return HOP_RETURN;
+
+ case INTEL_PT_FUP:
+ if (!decoder->packet.count)
+ return HOP_IGNORE;
+ intel_pt_set_ip(decoder);
+ if (decoder->set_fup_mwait || decoder->set_fup_pwre)
+ *no_tip = true;
+ if (!decoder->branch_enable || !decoder->pge)
+ *no_tip = true;
+ if (*no_tip) {
+ decoder->state.type = INTEL_PT_INSTRUCTION;
+ decoder->state.from_ip = decoder->ip;
+ decoder->state.to_ip = 0;
+ intel_pt_fup_event(decoder);
+ return HOP_RETURN;
+ }
+ intel_pt_fup_event(decoder);
+ decoder->state.type |= INTEL_PT_INSTRUCTION | INTEL_PT_BRANCH;
+ *err = intel_pt_walk_fup_tip(decoder);
+ if (!*err && decoder->state.to_ip)
+ decoder->pkt_state = INTEL_PT_STATE_RESAMPLE;
+ return HOP_RETURN;
+
+ case INTEL_PT_PSB:
+ decoder->last_ip = 0;
+ decoder->have_last_ip = true;
+ decoder->hop_psb_fup = false;
+ *err = intel_pt_walk_psbend(decoder);
+ if (*err == -EAGAIN)
+ return HOP_AGAIN;
+ if (*err)
+ return HOP_RETURN;
+ if (decoder->hop_psb_fup) {
+ decoder->hop_psb_fup = false;
+ decoder->state.type = INTEL_PT_INSTRUCTION;
+ decoder->state.from_ip = decoder->ip;
+ decoder->state.to_ip = 0;
+ return HOP_RETURN;
+ }
+ if (decoder->cbr != decoder->cbr_seen) {
+ decoder->state.type = 0;
+ return HOP_RETURN;
+ }
+ return HOP_IGNORE;
+
+ case INTEL_PT_BAD:
+ case INTEL_PT_PAD:
+ case INTEL_PT_TIP_PGE:
+ case INTEL_PT_TSC:
+ case INTEL_PT_TMA:
+ case INTEL_PT_MODE_EXEC:
+ case INTEL_PT_MODE_TSX:
+ case INTEL_PT_MTC:
+ case INTEL_PT_CYC:
+ case INTEL_PT_VMCS:
+ case INTEL_PT_PSBEND:
+ case INTEL_PT_CBR:
+ case INTEL_PT_TRACESTOP:
+ case INTEL_PT_PIP:
+ case INTEL_PT_OVF:
+ case INTEL_PT_MNT:
+ case INTEL_PT_PTWRITE:
+ case INTEL_PT_PTWRITE_IP:
+ case INTEL_PT_EXSTOP:
+ case INTEL_PT_EXSTOP_IP:
+ case INTEL_PT_MWAIT:
+ case INTEL_PT_PWRE:
+ case INTEL_PT_PWRX:
+ case INTEL_PT_BBP:
+ case INTEL_PT_BIP:
+ case INTEL_PT_BEP:
+ case INTEL_PT_BEP_IP:
+ default:
+ return HOP_PROCESS;
+ }
+}
+
+static int intel_pt_walk_trace(struct intel_pt_decoder *decoder)
+{
+ int last_packet_type = INTEL_PT_PAD;
+ bool no_tip = false;
+ int err;
+
+ while (1) {
+ err = intel_pt_get_next_packet(decoder);
+ if (err)
+ return err;
+next:
+ err = 0;
+ if (decoder->cyc_threshold) {
+ if (decoder->sample_cyc && last_packet_type != INTEL_PT_CYC)
+ decoder->sample_cyc = false;
+ last_packet_type = decoder->packet.type;
+ }
+
+ if (decoder->hop) {
+ switch (intel_pt_hop_trace(decoder, &no_tip, &err)) {
+ case HOP_IGNORE:
+ continue;
+ case HOP_RETURN:
+ return err;
+ case HOP_AGAIN:
+ goto next;
+ default:
+ break;
+ }
+ }
+
+ switch (decoder->packet.type) {
+ case INTEL_PT_TNT:
+ if (!decoder->packet.count)
+ break;
+ decoder->tnt = decoder->packet;
+ decoder->pkt_state = INTEL_PT_STATE_TNT;
+ err = intel_pt_walk_tnt(decoder);
+ if (err == -EAGAIN)
+ break;
+ return err;
+
+ case INTEL_PT_TIP_PGD:
+ if (decoder->packet.count != 0)
+ intel_pt_set_last_ip(decoder);
+ decoder->pkt_state = INTEL_PT_STATE_TIP_PGD;
+ return intel_pt_walk_tip(decoder);
+
+ case INTEL_PT_TIP_PGE: {
+ decoder->pge = true;
+ decoder->overflow = false;
+ intel_pt_mtc_cyc_cnt_pge(decoder);
+ if (decoder->packet.count == 0) {
+ intel_pt_log_at("Skipping zero TIP.PGE",
+ decoder->pos);
+ break;
+ }
+ intel_pt_set_ip(decoder);
+ decoder->state.from_ip = 0;
+ decoder->state.to_ip = decoder->ip;
+ decoder->state.type |= INTEL_PT_TRACE_BEGIN;
+ /*
+ * In hop mode, resample to get the to_ip as an
+ * "instruction" sample.
+ */
+ if (decoder->hop)
+ decoder->pkt_state = INTEL_PT_STATE_RESAMPLE;
+ return 0;
+ }
+
+ case INTEL_PT_OVF:
+ return intel_pt_overflow(decoder);
+
+ case INTEL_PT_TIP:
+ if (decoder->packet.count != 0)
+ intel_pt_set_last_ip(decoder);
+ decoder->pkt_state = INTEL_PT_STATE_TIP;
+ return intel_pt_walk_tip(decoder);
+
+ case INTEL_PT_FUP:
+ if (decoder->packet.count == 0) {
+ intel_pt_log_at("Skipping zero FUP",
+ decoder->pos);
+ no_tip = false;
+ break;
+ }
+ intel_pt_set_last_ip(decoder);
+ if (!decoder->branch_enable || !decoder->pge) {
+ decoder->ip = decoder->last_ip;
+ if (intel_pt_fup_event(decoder))
+ return 0;
+ no_tip = false;
+ break;
+ }
+ if (decoder->set_fup_mwait)
+ no_tip = true;
+ if (no_tip)
+ decoder->pkt_state = INTEL_PT_STATE_FUP_NO_TIP;
+ else
+ decoder->pkt_state = INTEL_PT_STATE_FUP;
+ err = intel_pt_walk_fup(decoder);
+ if (err != -EAGAIN)
+ return err;
+ if (no_tip) {
+ no_tip = false;
+ break;
+ }
+ return intel_pt_walk_fup_tip(decoder);
+
+ case INTEL_PT_TRACESTOP:
+ decoder->pge = false;
+ decoder->continuous_period = false;
+ intel_pt_clear_tx_flags(decoder);
+ decoder->have_tma = false;
+ break;
+
+ case INTEL_PT_PSB:
+ decoder->last_ip = 0;
+ decoder->have_last_ip = true;
+ intel_pt_clear_stack(&decoder->stack);
+ err = intel_pt_walk_psbend(decoder);
+ if (err == -EAGAIN)
+ goto next;
+ if (err)
+ return err;
+ /*
+ * PSB+ CBR will not have changed but cater for the
+ * possibility of another CBR change that gets caught up
+ * in the PSB+.
+ */
+ if (decoder->cbr != decoder->cbr_seen) {
+ decoder->state.type = 0;
+ return 0;
+ }
+ break;
+
+ case INTEL_PT_PIP:
+ decoder->cr3 = decoder->packet.payload & (BIT63 - 1);
+ break;
+
+ case INTEL_PT_MTC:
+ intel_pt_calc_mtc_timestamp(decoder);
+ if (decoder->period_type != INTEL_PT_PERIOD_MTC)
+ break;
+ /*
+ * Ensure that there has been an instruction since the
+ * last MTC.
+ */
+ if (!decoder->mtc_insn)
+ break;
+ decoder->mtc_insn = false;
+ /* Ensure that there is a timestamp */
+ if (!decoder->timestamp)
+ break;
+ decoder->state.type = INTEL_PT_INSTRUCTION;
+ decoder->state.from_ip = decoder->ip;
+ decoder->state.to_ip = 0;
+ decoder->mtc_insn = false;
+ return 0;
+
+ case INTEL_PT_TSC:
+ intel_pt_calc_tsc_timestamp(decoder);
+ break;
+
+ case INTEL_PT_TMA:
+ intel_pt_calc_tma(decoder);
+ break;
+
+ case INTEL_PT_CYC:
+ intel_pt_calc_cyc_timestamp(decoder);
+ break;
+
+ case INTEL_PT_CBR:
+ intel_pt_calc_cbr(decoder);
+ if (decoder->cbr != decoder->cbr_seen) {
+ decoder->state.type = 0;
+ return 0;
+ }
+ break;
+
+ case INTEL_PT_MODE_EXEC:
+ decoder->exec_mode = decoder->packet.payload;
+ break;
+
+ case INTEL_PT_MODE_TSX:
+ /* MODE_TSX need not be followed by FUP */
+ if (!decoder->pge || decoder->in_psb) {
+ intel_pt_update_in_tx(decoder);
+ break;
+ }
+ err = intel_pt_mode_tsx(decoder, &no_tip);
+ if (err)
+ return err;
+ goto next;
+
+ case INTEL_PT_BAD: /* Does not happen */
+ return intel_pt_bug(decoder);
+
+ case INTEL_PT_PSBEND:
+ case INTEL_PT_VMCS:
+ case INTEL_PT_MNT:
+ case INTEL_PT_PAD:
+ break;
+
+ case INTEL_PT_PTWRITE_IP:
+ decoder->fup_ptw_payload = decoder->packet.payload;
+ err = intel_pt_get_next_packet(decoder);
+ if (err)
+ return err;
+ if (decoder->packet.type == INTEL_PT_FUP) {
+ decoder->set_fup_ptw = true;
+ no_tip = true;
+ } else {
+ intel_pt_log_at("ERROR: Missing FUP after PTWRITE",
+ decoder->pos);
+ }
+ goto next;
+
+ case INTEL_PT_PTWRITE:
+ decoder->state.type = INTEL_PT_PTW;
+ decoder->state.from_ip = decoder->ip;
+ decoder->state.to_ip = 0;
+ decoder->state.ptw_payload = decoder->packet.payload;
+ return 0;
+
+ case INTEL_PT_MWAIT:
+ decoder->fup_mwait_payload = decoder->packet.payload;
+ decoder->set_fup_mwait = true;
+ break;
+
+ case INTEL_PT_PWRE:
+ if (decoder->set_fup_mwait) {
+ decoder->fup_pwre_payload =
+ decoder->packet.payload;
+ decoder->set_fup_pwre = true;
+ break;
+ }
+ decoder->state.type = INTEL_PT_PWR_ENTRY;
+ decoder->state.from_ip = decoder->ip;
+ decoder->state.to_ip = 0;
+ decoder->state.pwrx_payload = decoder->packet.payload;
+ return 0;
+
+ case INTEL_PT_EXSTOP_IP:
+ err = intel_pt_get_next_packet(decoder);
+ if (err)
+ return err;
+ if (decoder->packet.type == INTEL_PT_FUP) {
+ decoder->set_fup_exstop = true;
+ no_tip = true;
+ } else {
+ intel_pt_log_at("ERROR: Missing FUP after EXSTOP",
+ decoder->pos);
+ }
+ goto next;
+
+ case INTEL_PT_EXSTOP:
+ decoder->state.type = INTEL_PT_EX_STOP;
+ decoder->state.from_ip = decoder->ip;
+ decoder->state.to_ip = 0;
+ return 0;
+
+ case INTEL_PT_PWRX:
+ decoder->state.type = INTEL_PT_PWR_EXIT;
+ decoder->state.from_ip = decoder->ip;
+ decoder->state.to_ip = 0;
+ decoder->state.pwrx_payload = decoder->packet.payload;
+ return 0;
+
+ case INTEL_PT_BBP:
+ intel_pt_bbp(decoder);
+ break;
+
+ case INTEL_PT_BIP:
+ intel_pt_bip(decoder);
+ break;
+
+ case INTEL_PT_BEP:
+ decoder->state.type = INTEL_PT_BLK_ITEMS;
+ decoder->state.from_ip = decoder->ip;
+ decoder->state.to_ip = 0;
+ return 0;
+
+ case INTEL_PT_BEP_IP:
+ err = intel_pt_get_next_packet(decoder);
+ if (err)
+ return err;
+ if (decoder->packet.type == INTEL_PT_FUP) {
+ decoder->set_fup_bep = true;
+ no_tip = true;
+ } else {
+ intel_pt_log_at("ERROR: Missing FUP after BEP",
+ decoder->pos);
+ }
+ goto next;
+
+ default:
+ return intel_pt_bug(decoder);
+ }
+ }
+}
+
+static inline bool intel_pt_have_ip(struct intel_pt_decoder *decoder)
+{
+ return decoder->packet.count &&
+ (decoder->have_last_ip || decoder->packet.count == 3 ||
+ decoder->packet.count == 6);
+}
+
+/* Walk PSB+ packets to get in sync. */
+static int intel_pt_walk_psb(struct intel_pt_decoder *decoder)
+{
+ int err;
+
+ decoder->in_psb = true;
+
+ while (1) {
+ err = intel_pt_get_next_packet(decoder);
+ if (err)
+ goto out;
+
+ switch (decoder->packet.type) {
+ case INTEL_PT_TIP_PGD:
+ decoder->continuous_period = false;
+ __fallthrough;
+ case INTEL_PT_TIP_PGE:
+ case INTEL_PT_TIP:
+ case INTEL_PT_PTWRITE:
+ case INTEL_PT_PTWRITE_IP:
+ case INTEL_PT_EXSTOP:
+ case INTEL_PT_EXSTOP_IP:
+ case INTEL_PT_MWAIT:
+ case INTEL_PT_PWRE:
+ case INTEL_PT_PWRX:
+ case INTEL_PT_BBP:
+ case INTEL_PT_BIP:
+ case INTEL_PT_BEP:
+ case INTEL_PT_BEP_IP:
+ intel_pt_log("ERROR: Unexpected packet\n");
+ err = -ENOENT;
+ goto out;
+
+ case INTEL_PT_FUP:
+ decoder->pge = true;
+ if (intel_pt_have_ip(decoder)) {
+ uint64_t current_ip = decoder->ip;
+
+ intel_pt_set_ip(decoder);
+ if (current_ip)
+ intel_pt_log_to("Setting IP",
+ decoder->ip);
+ }
+ break;
+
+ case INTEL_PT_MTC:
+ intel_pt_calc_mtc_timestamp(decoder);
+ break;
+
+ case INTEL_PT_TSC:
+ intel_pt_calc_tsc_timestamp(decoder);
+ break;
+
+ case INTEL_PT_TMA:
+ intel_pt_calc_tma(decoder);
+ break;
+
+ case INTEL_PT_CYC:
+ intel_pt_calc_cyc_timestamp(decoder);
+ break;
+
+ case INTEL_PT_CBR:
+ intel_pt_calc_cbr(decoder);
+ break;
+
+ case INTEL_PT_PIP:
+ decoder->cr3 = decoder->packet.payload & (BIT63 - 1);
+ break;
+
+ case INTEL_PT_MODE_EXEC:
+ decoder->exec_mode = decoder->packet.payload;
+ break;
+
+ case INTEL_PT_MODE_TSX:
+ intel_pt_update_in_tx(decoder);
+ break;
+
+ case INTEL_PT_TRACESTOP:
+ decoder->pge = false;
+ decoder->continuous_period = false;
+ intel_pt_clear_tx_flags(decoder);
+ __fallthrough;
+
+ case INTEL_PT_TNT:
+ decoder->have_tma = false;
+ intel_pt_log("ERROR: Unexpected packet\n");
+ if (decoder->ip)
+ decoder->pkt_state = INTEL_PT_STATE_ERR4;
+ else
+ decoder->pkt_state = INTEL_PT_STATE_ERR3;
+ err = -ENOENT;
+ goto out;
+
+ case INTEL_PT_BAD: /* Does not happen */
+ err = intel_pt_bug(decoder);
+ goto out;
+
+ case INTEL_PT_OVF:
+ err = intel_pt_overflow(decoder);
+ goto out;
+
+ case INTEL_PT_PSBEND:
+ err = 0;
+ goto out;
+
+ case INTEL_PT_PSB:
+ case INTEL_PT_VMCS:
+ case INTEL_PT_MNT:
+ case INTEL_PT_PAD:
+ default:
+ break;
+ }
+ }
+out:
+ decoder->in_psb = false;
+
+ return err;
+}
+
+static int intel_pt_walk_to_ip(struct intel_pt_decoder *decoder)
+{
+ int err;
+
+ while (1) {
+ err = intel_pt_get_next_packet(decoder);
+ if (err)
+ return err;
+
+ switch (decoder->packet.type) {
+ case INTEL_PT_TIP_PGD:
+ decoder->continuous_period = false;
+ decoder->pge = false;
+ if (intel_pt_have_ip(decoder))
+ intel_pt_set_ip(decoder);
+ if (!decoder->ip)
+ break;
+ decoder->state.type |= INTEL_PT_TRACE_END;
+ return 0;
+
+ case INTEL_PT_TIP_PGE:
+ decoder->pge = true;
+ intel_pt_mtc_cyc_cnt_pge(decoder);
+ if (intel_pt_have_ip(decoder))
+ intel_pt_set_ip(decoder);
+ if (!decoder->ip)
+ break;
+ decoder->state.type |= INTEL_PT_TRACE_BEGIN;
+ return 0;
+
+ case INTEL_PT_TIP:
+ decoder->pge = true;
+ if (intel_pt_have_ip(decoder))
+ intel_pt_set_ip(decoder);
+ if (!decoder->ip)
+ break;
+ return 0;
+
+ case INTEL_PT_FUP:
+ if (intel_pt_have_ip(decoder))
+ intel_pt_set_ip(decoder);
+ if (decoder->ip)
+ return 0;
+ break;
+
+ case INTEL_PT_MTC:
+ intel_pt_calc_mtc_timestamp(decoder);
+ break;
+
+ case INTEL_PT_TSC:
+ intel_pt_calc_tsc_timestamp(decoder);
+ break;
+
+ case INTEL_PT_TMA:
+ intel_pt_calc_tma(decoder);
+ break;
+
+ case INTEL_PT_CYC:
+ intel_pt_calc_cyc_timestamp(decoder);
+ break;
+
+ case INTEL_PT_CBR:
+ intel_pt_calc_cbr(decoder);
+ break;
+
+ case INTEL_PT_PIP:
+ decoder->cr3 = decoder->packet.payload & (BIT63 - 1);
+ break;
+
+ case INTEL_PT_MODE_EXEC:
+ decoder->exec_mode = decoder->packet.payload;
+ break;
+
+ case INTEL_PT_MODE_TSX:
+ intel_pt_update_in_tx(decoder);
+ break;
+
+ case INTEL_PT_OVF:
+ return intel_pt_overflow(decoder);
+
+ case INTEL_PT_BAD: /* Does not happen */
+ return intel_pt_bug(decoder);
+
+ case INTEL_PT_TRACESTOP:
+ decoder->pge = false;
+ decoder->continuous_period = false;
+ intel_pt_clear_tx_flags(decoder);
+ decoder->have_tma = false;
+ break;
+
+ case INTEL_PT_PSB:
+ decoder->last_ip = 0;
+ decoder->have_last_ip = true;
+ intel_pt_clear_stack(&decoder->stack);
+ err = intel_pt_walk_psb(decoder);
+ if (err)
+ return err;
+ if (decoder->ip) {
+ /* Do not have a sample */
+ decoder->state.type = 0;
+ return 0;
+ }
+ break;
+
+ case INTEL_PT_TNT:
+ case INTEL_PT_PSBEND:
+ case INTEL_PT_VMCS:
+ case INTEL_PT_MNT:
+ case INTEL_PT_PAD:
+ case INTEL_PT_PTWRITE:
+ case INTEL_PT_PTWRITE_IP:
+ case INTEL_PT_EXSTOP:
+ case INTEL_PT_EXSTOP_IP:
+ case INTEL_PT_MWAIT:
+ case INTEL_PT_PWRE:
+ case INTEL_PT_PWRX:
+ case INTEL_PT_BBP:
+ case INTEL_PT_BIP:
+ case INTEL_PT_BEP:
+ case INTEL_PT_BEP_IP:
+ default:
+ break;
+ }
+ }
+}
+
+static int intel_pt_sync_ip(struct intel_pt_decoder *decoder)
+{
+ int err;
+
+ decoder->set_fup_tx_flags = false;
+ decoder->set_fup_ptw = false;
+ decoder->set_fup_mwait = false;
+ decoder->set_fup_pwre = false;
+ decoder->set_fup_exstop = false;
+ decoder->set_fup_bep = false;
+ decoder->overflow = false;
+
+ if (!decoder->branch_enable) {
+ decoder->pkt_state = INTEL_PT_STATE_IN_SYNC;
+ decoder->state.type = 0; /* Do not have a sample */
+ return 0;
+ }
+
+ intel_pt_log("Scanning for full IP\n");
+ err = intel_pt_walk_to_ip(decoder);
+ if (err)
+ return err;
+
+ /* In hop mode, resample to get the to_ip as an "instruction" sample */
+ if (decoder->hop)
+ decoder->pkt_state = INTEL_PT_STATE_RESAMPLE;
+ else
+ decoder->pkt_state = INTEL_PT_STATE_IN_SYNC;
+
+ decoder->state.from_ip = 0;
+ decoder->state.to_ip = decoder->ip;
+ intel_pt_log_to("Setting IP", decoder->ip);
+
+ return 0;
+}
+
+static int intel_pt_part_psb(struct intel_pt_decoder *decoder)
+{
+ const unsigned char *end = decoder->buf + decoder->len;
+ size_t i;
+
+ for (i = INTEL_PT_PSB_LEN - 1; i; i--) {
+ if (i > decoder->len)
+ continue;
+ if (!memcmp(end - i, INTEL_PT_PSB_STR, i))
+ return i;
+ }
+ return 0;
+}
+
+static int intel_pt_rest_psb(struct intel_pt_decoder *decoder, int part_psb)
+{
+ size_t rest_psb = INTEL_PT_PSB_LEN - part_psb;
+ const char *psb = INTEL_PT_PSB_STR;
+
+ if (rest_psb > decoder->len ||
+ memcmp(decoder->buf, psb + part_psb, rest_psb))
+ return 0;
+
+ return rest_psb;
+}
+
+static int intel_pt_get_split_psb(struct intel_pt_decoder *decoder,
+ int part_psb)
+{
+ int rest_psb, ret;
+
+ decoder->pos += decoder->len;
+ decoder->len = 0;
+
+ ret = intel_pt_get_next_data(decoder, false);
+ if (ret)
+ return ret;
+
+ rest_psb = intel_pt_rest_psb(decoder, part_psb);
+ if (!rest_psb)
+ return 0;
+
+ decoder->pos -= part_psb;
+ decoder->next_buf = decoder->buf + rest_psb;
+ decoder->next_len = decoder->len - rest_psb;
+ memcpy(decoder->temp_buf, INTEL_PT_PSB_STR, INTEL_PT_PSB_LEN);
+ decoder->buf = decoder->temp_buf;
+ decoder->len = INTEL_PT_PSB_LEN;
+
+ return 0;
+}
+
+static int intel_pt_scan_for_psb(struct intel_pt_decoder *decoder)
+{
+ unsigned char *next;
+ int ret;
+
+ intel_pt_log("Scanning for PSB\n");
+ while (1) {
+ if (!decoder->len) {
+ ret = intel_pt_get_next_data(decoder, false);
+ if (ret)
+ return ret;
+ }
+
+ next = memmem(decoder->buf, decoder->len, INTEL_PT_PSB_STR,
+ INTEL_PT_PSB_LEN);
+ if (!next) {
+ int part_psb;
+
+ part_psb = intel_pt_part_psb(decoder);
+ if (part_psb) {
+ ret = intel_pt_get_split_psb(decoder, part_psb);
+ if (ret)
+ return ret;
+ } else {
+ decoder->pos += decoder->len;
+ decoder->len = 0;
+ }
+ continue;
+ }
+
+ decoder->pkt_step = next - decoder->buf;
+ return intel_pt_get_next_packet(decoder);
+ }
+}
+
+static int intel_pt_sync(struct intel_pt_decoder *decoder)
+{
+ int err;
+
+ decoder->pge = false;
+ decoder->continuous_period = false;
+ decoder->have_last_ip = false;
+ decoder->last_ip = 0;
+ decoder->ip = 0;
+ intel_pt_clear_stack(&decoder->stack);
+
+leap:
+ err = intel_pt_scan_for_psb(decoder);
+ if (err)
+ return err;
+
+ decoder->have_last_ip = true;
+ decoder->pkt_state = INTEL_PT_STATE_IN_SYNC;
+
+ err = intel_pt_walk_psb(decoder);
+ if (err)
+ return err;
+
+ if (decoder->ip) {
+ decoder->state.type = 0; /* Do not have a sample */
+ /*
+ * In hop mode, resample to get the PSB FUP ip as an
+ * "instruction" sample.
+ */
+ if (decoder->hop)
+ decoder->pkt_state = INTEL_PT_STATE_RESAMPLE;
+ else
+ decoder->pkt_state = INTEL_PT_STATE_IN_SYNC;
+ } else if (decoder->leap) {
+ /*
+ * In leap mode, only PSB+ is decoded, so keeping leaping to the
+ * next PSB until there is an ip.
+ */
+ goto leap;
+ } else {
+ return intel_pt_sync_ip(decoder);
+ }
+
+ return 0;
+}
+
+static uint64_t intel_pt_est_timestamp(struct intel_pt_decoder *decoder)
+{
+ uint64_t est = decoder->sample_insn_cnt << 1;
+
+ if (!decoder->cbr || !decoder->max_non_turbo_ratio)
+ goto out;
+
+ est *= decoder->max_non_turbo_ratio;
+ est /= decoder->cbr;
+out:
+ return decoder->sample_timestamp + est;
+}
+
+const struct intel_pt_state *intel_pt_decode(struct intel_pt_decoder *decoder)
+{
+ int err;
+
+ do {
+ decoder->state.type = INTEL_PT_BRANCH;
+ decoder->state.flags = 0;
+
+ switch (decoder->pkt_state) {
+ case INTEL_PT_STATE_NO_PSB:
+ err = intel_pt_sync(decoder);
+ break;
+ case INTEL_PT_STATE_NO_IP:
+ decoder->have_last_ip = false;
+ decoder->last_ip = 0;
+ decoder->ip = 0;
+ __fallthrough;
+ case INTEL_PT_STATE_ERR_RESYNC:
+ err = intel_pt_sync_ip(decoder);
+ break;
+ case INTEL_PT_STATE_IN_SYNC:
+ err = intel_pt_walk_trace(decoder);
+ break;
+ case INTEL_PT_STATE_TNT:
+ case INTEL_PT_STATE_TNT_CONT:
+ err = intel_pt_walk_tnt(decoder);
+ if (err == -EAGAIN)
+ err = intel_pt_walk_trace(decoder);
+ break;
+ case INTEL_PT_STATE_TIP:
+ case INTEL_PT_STATE_TIP_PGD:
+ err = intel_pt_walk_tip(decoder);
+ break;
+ case INTEL_PT_STATE_FUP:
+ err = intel_pt_walk_fup(decoder);
+ if (err == -EAGAIN)
+ err = intel_pt_walk_fup_tip(decoder);
+ break;
+ case INTEL_PT_STATE_FUP_NO_TIP:
+ err = intel_pt_walk_fup(decoder);
+ if (err == -EAGAIN)
+ err = intel_pt_walk_trace(decoder);
+ break;
+ case INTEL_PT_STATE_RESAMPLE:
+ err = intel_pt_resample(decoder);
+ break;
+ default:
+ err = intel_pt_bug(decoder);
+ break;
+ }
+ } while (err == -ENOLINK);
+
+ if (err) {
+ decoder->state.err = intel_pt_ext_err(err);
+ if (err != -EOVERFLOW)
+ decoder->state.from_ip = decoder->ip;
+ intel_pt_update_sample_time(decoder);
+ decoder->sample_tot_cyc_cnt = decoder->tot_cyc_cnt;
+ } else {
+ decoder->state.err = 0;
+ if (decoder->cbr != decoder->cbr_seen) {
+ decoder->cbr_seen = decoder->cbr;
+ if (!decoder->state.type) {
+ decoder->state.from_ip = decoder->ip;
+ decoder->state.to_ip = 0;
+ }
+ decoder->state.type |= INTEL_PT_CBR_CHG;
+ decoder->state.cbr_payload = decoder->cbr_payload;
+ decoder->state.cbr = decoder->cbr;
+ }
+ if (intel_pt_sample_time(decoder->pkt_state)) {
+ intel_pt_update_sample_time(decoder);
+ if (decoder->sample_cyc) {
+ decoder->sample_tot_cyc_cnt = decoder->tot_cyc_cnt;
+ decoder->state.flags |= INTEL_PT_SAMPLE_IPC;
+ decoder->sample_cyc = false;
+ }
+ }
+ /*
+ * When using only TSC/MTC to compute cycles, IPC can be
+ * sampled as soon as the cycle count changes.
+ */
+ if (!decoder->have_cyc)
+ decoder->state.flags |= INTEL_PT_SAMPLE_IPC;
+ }
+
+ decoder->state.timestamp = decoder->sample_timestamp;
+ decoder->state.est_timestamp = intel_pt_est_timestamp(decoder);
+ decoder->state.cr3 = decoder->cr3;
+ decoder->state.tot_insn_cnt = decoder->tot_insn_cnt;
+ decoder->state.tot_cyc_cnt = decoder->sample_tot_cyc_cnt;
+
+ return &decoder->state;
+}
+
+/**
+ * intel_pt_next_psb - move buffer pointer to the start of the next PSB packet.
+ * @buf: pointer to buffer pointer
+ * @len: size of buffer
+ *
+ * Updates the buffer pointer to point to the start of the next PSB packet if
+ * there is one, otherwise the buffer pointer is unchanged. If @buf is updated,
+ * @len is adjusted accordingly.
+ *
+ * Return: %true if a PSB packet is found, %false otherwise.
+ */
+static bool intel_pt_next_psb(unsigned char **buf, size_t *len)
+{
+ unsigned char *next;
+
+ next = memmem(*buf, *len, INTEL_PT_PSB_STR, INTEL_PT_PSB_LEN);
+ if (next) {
+ *len -= next - *buf;
+ *buf = next;
+ return true;
+ }
+ return false;
+}
+
+/**
+ * intel_pt_step_psb - move buffer pointer to the start of the following PSB
+ * packet.
+ * @buf: pointer to buffer pointer
+ * @len: size of buffer
+ *
+ * Updates the buffer pointer to point to the start of the following PSB packet
+ * (skipping the PSB at @buf itself) if there is one, otherwise the buffer
+ * pointer is unchanged. If @buf is updated, @len is adjusted accordingly.
+ *
+ * Return: %true if a PSB packet is found, %false otherwise.
+ */
+static bool intel_pt_step_psb(unsigned char **buf, size_t *len)
+{
+ unsigned char *next;
+
+ if (!*len)
+ return false;
+
+ next = memmem(*buf + 1, *len - 1, INTEL_PT_PSB_STR, INTEL_PT_PSB_LEN);
+ if (next) {
+ *len -= next - *buf;
+ *buf = next;
+ return true;
+ }
+ return false;
+}
+
+/**
+ * intel_pt_last_psb - find the last PSB packet in a buffer.
+ * @buf: buffer
+ * @len: size of buffer
+ *
+ * This function finds the last PSB in a buffer.
+ *
+ * Return: A pointer to the last PSB in @buf if found, %NULL otherwise.
+ */
+static unsigned char *intel_pt_last_psb(unsigned char *buf, size_t len)
+{
+ const char *n = INTEL_PT_PSB_STR;
+ unsigned char *p;
+ size_t k;
+
+ if (len < INTEL_PT_PSB_LEN)
+ return NULL;
+
+ k = len - INTEL_PT_PSB_LEN + 1;
+ while (1) {
+ p = memrchr(buf, n[0], k);
+ if (!p)
+ return NULL;
+ if (!memcmp(p + 1, n + 1, INTEL_PT_PSB_LEN - 1))
+ return p;
+ k = p - buf;
+ if (!k)
+ return NULL;
+ }
+}
+
+/**
+ * intel_pt_next_tsc - find and return next TSC.
+ * @buf: buffer
+ * @len: size of buffer
+ * @tsc: TSC value returned
+ * @rem: returns remaining size when TSC is found
+ *
+ * Find a TSC packet in @buf and return the TSC value. This function assumes
+ * that @buf starts at a PSB and that PSB+ will contain TSC and so stops if a
+ * PSBEND packet is found.
+ *
+ * Return: %true if TSC is found, false otherwise.
+ */
+static bool intel_pt_next_tsc(unsigned char *buf, size_t len, uint64_t *tsc,
+ size_t *rem)
+{
+ enum intel_pt_pkt_ctx ctx = INTEL_PT_NO_CTX;
+ struct intel_pt_pkt packet;
+ int ret;
+
+ while (len) {
+ ret = intel_pt_get_packet(buf, len, &packet, &ctx);
+ if (ret <= 0)
+ return false;
+ if (packet.type == INTEL_PT_TSC) {
+ *tsc = packet.payload;
+ *rem = len;
+ return true;
+ }
+ if (packet.type == INTEL_PT_PSBEND)
+ return false;
+ buf += ret;
+ len -= ret;
+ }
+ return false;
+}
+
+/**
+ * intel_pt_tsc_cmp - compare 7-byte TSCs.
+ * @tsc1: first TSC to compare
+ * @tsc2: second TSC to compare
+ *
+ * This function compares 7-byte TSC values allowing for the possibility that
+ * TSC wrapped around. Generally it is not possible to know if TSC has wrapped
+ * around so for that purpose this function assumes the absolute difference is
+ * less than half the maximum difference.
+ *
+ * Return: %-1 if @tsc1 is before @tsc2, %0 if @tsc1 == @tsc2, %1 if @tsc1 is
+ * after @tsc2.
+ */
+static int intel_pt_tsc_cmp(uint64_t tsc1, uint64_t tsc2)
+{
+ const uint64_t halfway = (1ULL << 55);
+
+ if (tsc1 == tsc2)
+ return 0;
+
+ if (tsc1 < tsc2) {
+ if (tsc2 - tsc1 < halfway)
+ return -1;
+ else
+ return 1;
+ } else {
+ if (tsc1 - tsc2 < halfway)
+ return 1;
+ else
+ return -1;
+ }
+}
+
+#define MAX_PADDING (PERF_AUXTRACE_RECORD_ALIGNMENT - 1)
+
+/**
+ * adj_for_padding - adjust overlap to account for padding.
+ * @buf_b: second buffer
+ * @buf_a: first buffer
+ * @len_a: size of first buffer
+ *
+ * @buf_a might have up to 7 bytes of padding appended. Adjust the overlap
+ * accordingly.
+ *
+ * Return: A pointer into @buf_b from where non-overlapped data starts
+ */
+static unsigned char *adj_for_padding(unsigned char *buf_b,
+ unsigned char *buf_a, size_t len_a)
+{
+ unsigned char *p = buf_b - MAX_PADDING;
+ unsigned char *q = buf_a + len_a - MAX_PADDING;
+ int i;
+
+ for (i = MAX_PADDING; i; i--, p++, q++) {
+ if (*p != *q)
+ break;
+ }
+
+ return p;
+}
+
+/**
+ * intel_pt_find_overlap_tsc - determine start of non-overlapped trace data
+ * using TSC.
+ * @buf_a: first buffer
+ * @len_a: size of first buffer
+ * @buf_b: second buffer
+ * @len_b: size of second buffer
+ * @consecutive: returns true if there is data in buf_b that is consecutive
+ * to buf_a
+ *
+ * If the trace contains TSC we can look at the last TSC of @buf_a and the
+ * first TSC of @buf_b in order to determine if the buffers overlap, and then
+ * walk forward in @buf_b until a later TSC is found. A precondition is that
+ * @buf_a and @buf_b are positioned at a PSB.
+ *
+ * Return: A pointer into @buf_b from where non-overlapped data starts, or
+ * @buf_b + @len_b if there is no non-overlapped data.
+ */
+static unsigned char *intel_pt_find_overlap_tsc(unsigned char *buf_a,
+ size_t len_a,
+ unsigned char *buf_b,
+ size_t len_b, bool *consecutive)
+{
+ uint64_t tsc_a, tsc_b;
+ unsigned char *p;
+ size_t len, rem_a, rem_b;
+
+ p = intel_pt_last_psb(buf_a, len_a);
+ if (!p)
+ return buf_b; /* No PSB in buf_a => no overlap */
+
+ len = len_a - (p - buf_a);
+ if (!intel_pt_next_tsc(p, len, &tsc_a, &rem_a)) {
+ /* The last PSB+ in buf_a is incomplete, so go back one more */
+ len_a -= len;
+ p = intel_pt_last_psb(buf_a, len_a);
+ if (!p)
+ return buf_b; /* No full PSB+ => assume no overlap */
+ len = len_a - (p - buf_a);
+ if (!intel_pt_next_tsc(p, len, &tsc_a, &rem_a))
+ return buf_b; /* No TSC in buf_a => assume no overlap */
+ }
+
+ while (1) {
+ /* Ignore PSB+ with no TSC */
+ if (intel_pt_next_tsc(buf_b, len_b, &tsc_b, &rem_b)) {
+ int cmp = intel_pt_tsc_cmp(tsc_a, tsc_b);
+
+ /* Same TSC, so buffers are consecutive */
+ if (!cmp && rem_b >= rem_a) {
+ unsigned char *start;
+
+ *consecutive = true;
+ start = buf_b + len_b - (rem_b - rem_a);
+ return adj_for_padding(start, buf_a, len_a);
+ }
+ if (cmp < 0)
+ return buf_b; /* tsc_a < tsc_b => no overlap */
+ }
+
+ if (!intel_pt_step_psb(&buf_b, &len_b))
+ return buf_b + len_b; /* No PSB in buf_b => no data */
+ }
+}
+
+/**
+ * intel_pt_find_overlap - determine start of non-overlapped trace data.
+ * @buf_a: first buffer
+ * @len_a: size of first buffer
+ * @buf_b: second buffer
+ * @len_b: size of second buffer
+ * @have_tsc: can use TSC packets to detect overlap
+ * @consecutive: returns true if there is data in buf_b that is consecutive
+ * to buf_a
+ *
+ * When trace samples or snapshots are recorded there is the possibility that
+ * the data overlaps. Note that, for the purposes of decoding, data is only
+ * useful if it begins with a PSB packet.
+ *
+ * Return: A pointer into @buf_b from where non-overlapped data starts, or
+ * @buf_b + @len_b if there is no non-overlapped data.
+ */
+unsigned char *intel_pt_find_overlap(unsigned char *buf_a, size_t len_a,
+ unsigned char *buf_b, size_t len_b,
+ bool have_tsc, bool *consecutive)
+{
+ unsigned char *found;
+
+ /* Buffer 'b' must start at PSB so throw away everything before that */
+ if (!intel_pt_next_psb(&buf_b, &len_b))
+ return buf_b + len_b; /* No PSB */
+
+ if (!intel_pt_next_psb(&buf_a, &len_a))
+ return buf_b; /* No overlap */
+
+ if (have_tsc) {
+ found = intel_pt_find_overlap_tsc(buf_a, len_a, buf_b, len_b,
+ consecutive);
+ if (found)
+ return found;
+ }
+
+ /*
+ * Buffer 'b' cannot end within buffer 'a' so, for comparison purposes,
+ * we can ignore the first part of buffer 'a'.
+ */
+ while (len_b < len_a) {
+ if (!intel_pt_step_psb(&buf_a, &len_a))
+ return buf_b; /* No overlap */
+ }
+
+ /* Now len_b >= len_a */
+ while (1) {
+ /* Potential overlap so check the bytes */
+ found = memmem(buf_a, len_a, buf_b, len_a);
+ if (found) {
+ *consecutive = true;
+ return adj_for_padding(buf_b + len_a, buf_a, len_a);
+ }
+
+ /* Try again at next PSB in buffer 'a' */
+ if (!intel_pt_step_psb(&buf_a, &len_a))
+ return buf_b; /* No overlap */
+ }
+}
+
+/**
+ * struct fast_forward_data - data used by intel_pt_ff_cb().
+ * @timestamp: timestamp to fast forward towards
+ * @buf_timestamp: buffer timestamp of last buffer with trace data earlier than
+ * the fast forward timestamp.
+ */
+struct fast_forward_data {
+ uint64_t timestamp;
+ uint64_t buf_timestamp;
+};
+
+/**
+ * intel_pt_ff_cb - fast forward lookahead callback.
+ * @buffer: Intel PT trace buffer
+ * @data: opaque pointer to fast forward data (struct fast_forward_data)
+ *
+ * Determine if @buffer trace is past the fast forward timestamp.
+ *
+ * Return: 1 (stop lookahead) if @buffer trace is past the fast forward
+ * timestamp, and 0 otherwise.
+ */
+static int intel_pt_ff_cb(struct intel_pt_buffer *buffer, void *data)
+{
+ struct fast_forward_data *d = data;
+ unsigned char *buf;
+ uint64_t tsc;
+ size_t rem;
+ size_t len;
+
+ buf = (unsigned char *)buffer->buf;
+ len = buffer->len;
+
+ if (!intel_pt_next_psb(&buf, &len) ||
+ !intel_pt_next_tsc(buf, len, &tsc, &rem))
+ return 0;
+
+ tsc = intel_pt_8b_tsc(tsc, buffer->ref_timestamp);
+
+ intel_pt_log("Buffer 1st timestamp " x64_fmt " ref timestamp " x64_fmt "\n",
+ tsc, buffer->ref_timestamp);
+
+ /*
+ * If the buffer contains a timestamp earlier that the fast forward
+ * timestamp, then record it, else stop.
+ */
+ if (tsc < d->timestamp)
+ d->buf_timestamp = buffer->ref_timestamp;
+ else
+ return 1;
+
+ return 0;
+}
+
+/**
+ * intel_pt_fast_forward - reposition decoder forwards.
+ * @decoder: Intel PT decoder
+ * @timestamp: timestamp to fast forward towards
+ *
+ * Reposition decoder at the last PSB with a timestamp earlier than @timestamp.
+ *
+ * Return: 0 on success or negative error code on failure.
+ */
+int intel_pt_fast_forward(struct intel_pt_decoder *decoder, uint64_t timestamp)
+{
+ struct fast_forward_data d = { .timestamp = timestamp };
+ unsigned char *buf;
+ size_t len;
+ int err;
+
+ intel_pt_log("Fast forward towards timestamp " x64_fmt "\n", timestamp);
+
+ /* Find buffer timestamp of buffer to fast forward to */
+ err = decoder->lookahead(decoder->data, intel_pt_ff_cb, &d);
+ if (err < 0)
+ return err;
+
+ /* Walk to buffer with same buffer timestamp */
+ if (d.buf_timestamp) {
+ do {
+ decoder->pos += decoder->len;
+ decoder->len = 0;
+ err = intel_pt_get_next_data(decoder, true);
+ /* -ENOLINK means non-consecutive trace */
+ if (err && err != -ENOLINK)
+ return err;
+ } while (decoder->buf_timestamp != d.buf_timestamp);
+ }
+
+ if (!decoder->buf)
+ return 0;
+
+ buf = (unsigned char *)decoder->buf;
+ len = decoder->len;
+
+ if (!intel_pt_next_psb(&buf, &len))
+ return 0;
+
+ /*
+ * Walk PSBs while the PSB timestamp is less than the fast forward
+ * timestamp.
+ */
+ do {
+ uint64_t tsc;
+ size_t rem;
+
+ if (!intel_pt_next_tsc(buf, len, &tsc, &rem))
+ break;
+ tsc = intel_pt_8b_tsc(tsc, decoder->buf_timestamp);
+ /*
+ * A TSC packet can slip past MTC packets but, after fast
+ * forward, decoding starts at the TSC timestamp. That means
+ * the timestamps may not be exactly the same as the timestamps
+ * that would have been decoded without fast forward.
+ */
+ if (tsc < timestamp) {
+ intel_pt_log("Fast forward to next PSB timestamp " x64_fmt "\n", tsc);
+ decoder->pos += decoder->len - len;
+ decoder->buf = buf;
+ decoder->len = len;
+ intel_pt_reposition(decoder);
+ } else {
+ break;
+ }
+ } while (intel_pt_step_psb(&buf, &len));
+
+ return 0;
+}
diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.h b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.h
new file mode 100644
index 000000000..48adaa78a
--- /dev/null
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.h
@@ -0,0 +1,273 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * intel_pt_decoder.h: Intel Processor Trace support
+ * Copyright (c) 2013-2014, Intel Corporation.
+ */
+
+#ifndef INCLUDE__INTEL_PT_DECODER_H__
+#define INCLUDE__INTEL_PT_DECODER_H__
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+#include "intel-pt-insn-decoder.h"
+
+#define INTEL_PT_IN_TX (1 << 0)
+#define INTEL_PT_ABORT_TX (1 << 1)
+#define INTEL_PT_ASYNC (1 << 2)
+#define INTEL_PT_FUP_IP (1 << 3)
+#define INTEL_PT_SAMPLE_IPC (1 << 4)
+
+enum intel_pt_sample_type {
+ INTEL_PT_BRANCH = 1 << 0,
+ INTEL_PT_INSTRUCTION = 1 << 1,
+ INTEL_PT_TRANSACTION = 1 << 2,
+ INTEL_PT_PTW = 1 << 3,
+ INTEL_PT_MWAIT_OP = 1 << 4,
+ INTEL_PT_PWR_ENTRY = 1 << 5,
+ INTEL_PT_EX_STOP = 1 << 6,
+ INTEL_PT_PWR_EXIT = 1 << 7,
+ INTEL_PT_CBR_CHG = 1 << 8,
+ INTEL_PT_TRACE_BEGIN = 1 << 9,
+ INTEL_PT_TRACE_END = 1 << 10,
+ INTEL_PT_BLK_ITEMS = 1 << 11,
+};
+
+enum intel_pt_period_type {
+ INTEL_PT_PERIOD_NONE,
+ INTEL_PT_PERIOD_INSTRUCTIONS,
+ INTEL_PT_PERIOD_TICKS,
+ INTEL_PT_PERIOD_MTC,
+};
+
+enum {
+ INTEL_PT_ERR_NOMEM = 1,
+ INTEL_PT_ERR_INTERN,
+ INTEL_PT_ERR_BADPKT,
+ INTEL_PT_ERR_NODATA,
+ INTEL_PT_ERR_NOINSN,
+ INTEL_PT_ERR_MISMAT,
+ INTEL_PT_ERR_OVR,
+ INTEL_PT_ERR_LOST,
+ INTEL_PT_ERR_UNK,
+ INTEL_PT_ERR_NELOOP,
+ INTEL_PT_ERR_MAX,
+};
+
+enum intel_pt_param_flags {
+ /*
+ * FUP packet can contain next linear instruction pointer instead of
+ * current linear instruction pointer.
+ */
+ INTEL_PT_FUP_WITH_NLIP = 1 << 0,
+};
+
+enum intel_pt_blk_type {
+ INTEL_PT_GP_REGS = 1,
+ INTEL_PT_PEBS_BASIC = 4,
+ INTEL_PT_PEBS_MEM = 5,
+ INTEL_PT_LBR_0 = 8,
+ INTEL_PT_LBR_1 = 9,
+ INTEL_PT_LBR_2 = 10,
+ INTEL_PT_XMM = 16,
+ INTEL_PT_BLK_TYPE_MAX
+};
+
+/*
+ * The block type numbers are not sequential but here they are given sequential
+ * positions to avoid wasting space for array placement.
+ */
+enum intel_pt_blk_type_pos {
+ INTEL_PT_GP_REGS_POS,
+ INTEL_PT_PEBS_BASIC_POS,
+ INTEL_PT_PEBS_MEM_POS,
+ INTEL_PT_LBR_0_POS,
+ INTEL_PT_LBR_1_POS,
+ INTEL_PT_LBR_2_POS,
+ INTEL_PT_XMM_POS,
+ INTEL_PT_BLK_TYPE_CNT
+};
+
+/* Get the array position for a block type */
+static inline int intel_pt_blk_type_pos(enum intel_pt_blk_type blk_type)
+{
+#define BLK_TYPE(bt) [INTEL_PT_##bt] = INTEL_PT_##bt##_POS + 1
+ const int map[INTEL_PT_BLK_TYPE_MAX] = {
+ BLK_TYPE(GP_REGS),
+ BLK_TYPE(PEBS_BASIC),
+ BLK_TYPE(PEBS_MEM),
+ BLK_TYPE(LBR_0),
+ BLK_TYPE(LBR_1),
+ BLK_TYPE(LBR_2),
+ BLK_TYPE(XMM),
+ };
+#undef BLK_TYPE
+
+ return blk_type < INTEL_PT_BLK_TYPE_MAX ? map[blk_type] - 1 : -1;
+}
+
+#define INTEL_PT_BLK_ITEM_ID_CNT 32
+
+/*
+ * Use unions so that the block items can be accessed by name or by array index.
+ * There is an array of 32-bit masks for each block type, which indicate which
+ * values are present. Then arrays of 32 64-bit values for each block type.
+ */
+struct intel_pt_blk_items {
+ union {
+ uint32_t mask[INTEL_PT_BLK_TYPE_CNT];
+ struct {
+ uint32_t has_rflags:1;
+ uint32_t has_rip:1;
+ uint32_t has_rax:1;
+ uint32_t has_rcx:1;
+ uint32_t has_rdx:1;
+ uint32_t has_rbx:1;
+ uint32_t has_rsp:1;
+ uint32_t has_rbp:1;
+ uint32_t has_rsi:1;
+ uint32_t has_rdi:1;
+ uint32_t has_r8:1;
+ uint32_t has_r9:1;
+ uint32_t has_r10:1;
+ uint32_t has_r11:1;
+ uint32_t has_r12:1;
+ uint32_t has_r13:1;
+ uint32_t has_r14:1;
+ uint32_t has_r15:1;
+ uint32_t has_unused_0:14;
+ uint32_t has_ip:1;
+ uint32_t has_applicable_counters:1;
+ uint32_t has_timestamp:1;
+ uint32_t has_unused_1:29;
+ uint32_t has_mem_access_address:1;
+ uint32_t has_mem_aux_info:1;
+ uint32_t has_mem_access_latency:1;
+ uint32_t has_tsx_aux_info:1;
+ uint32_t has_unused_2:28;
+ uint32_t has_lbr_0;
+ uint32_t has_lbr_1;
+ uint32_t has_lbr_2;
+ uint32_t has_xmm;
+ };
+ };
+ union {
+ uint64_t val[INTEL_PT_BLK_TYPE_CNT][INTEL_PT_BLK_ITEM_ID_CNT];
+ struct {
+ struct {
+ uint64_t rflags;
+ uint64_t rip;
+ uint64_t rax;
+ uint64_t rcx;
+ uint64_t rdx;
+ uint64_t rbx;
+ uint64_t rsp;
+ uint64_t rbp;
+ uint64_t rsi;
+ uint64_t rdi;
+ uint64_t r8;
+ uint64_t r9;
+ uint64_t r10;
+ uint64_t r11;
+ uint64_t r12;
+ uint64_t r13;
+ uint64_t r14;
+ uint64_t r15;
+ uint64_t unused_0[INTEL_PT_BLK_ITEM_ID_CNT - 18];
+ };
+ struct {
+ uint64_t ip;
+ uint64_t applicable_counters;
+ uint64_t timestamp;
+ uint64_t unused_1[INTEL_PT_BLK_ITEM_ID_CNT - 3];
+ };
+ struct {
+ uint64_t mem_access_address;
+ uint64_t mem_aux_info;
+ uint64_t mem_access_latency;
+ uint64_t tsx_aux_info;
+ uint64_t unused_2[INTEL_PT_BLK_ITEM_ID_CNT - 4];
+ };
+ uint64_t lbr_0[INTEL_PT_BLK_ITEM_ID_CNT];
+ uint64_t lbr_1[INTEL_PT_BLK_ITEM_ID_CNT];
+ uint64_t lbr_2[INTEL_PT_BLK_ITEM_ID_CNT];
+ uint64_t xmm[INTEL_PT_BLK_ITEM_ID_CNT];
+ };
+ };
+ bool is_32_bit;
+};
+
+struct intel_pt_state {
+ enum intel_pt_sample_type type;
+ int err;
+ uint64_t from_ip;
+ uint64_t to_ip;
+ uint64_t cr3;
+ uint64_t tot_insn_cnt;
+ uint64_t tot_cyc_cnt;
+ uint64_t timestamp;
+ uint64_t est_timestamp;
+ uint64_t trace_nr;
+ uint64_t ptw_payload;
+ uint64_t mwait_payload;
+ uint64_t pwre_payload;
+ uint64_t pwrx_payload;
+ uint64_t cbr_payload;
+ uint32_t cbr;
+ uint32_t flags;
+ enum intel_pt_insn_op insn_op;
+ int insn_len;
+ char insn[INTEL_PT_INSN_BUF_SZ];
+ struct intel_pt_blk_items items;
+};
+
+struct intel_pt_insn;
+
+struct intel_pt_buffer {
+ const unsigned char *buf;
+ size_t len;
+ bool consecutive;
+ uint64_t ref_timestamp;
+ uint64_t trace_nr;
+};
+
+typedef int (*intel_pt_lookahead_cb_t)(struct intel_pt_buffer *, void *);
+
+struct intel_pt_params {
+ int (*get_trace)(struct intel_pt_buffer *buffer, void *data);
+ int (*walk_insn)(struct intel_pt_insn *intel_pt_insn,
+ uint64_t *insn_cnt_ptr, uint64_t *ip, uint64_t to_ip,
+ uint64_t max_insn_cnt, void *data);
+ bool (*pgd_ip)(uint64_t ip, void *data);
+ int (*lookahead)(void *data, intel_pt_lookahead_cb_t cb, void *cb_data);
+ void *data;
+ bool return_compression;
+ bool branch_enable;
+ uint64_t ctl;
+ uint64_t period;
+ enum intel_pt_period_type period_type;
+ unsigned max_non_turbo_ratio;
+ unsigned int mtc_period;
+ uint32_t tsc_ctc_ratio_n;
+ uint32_t tsc_ctc_ratio_d;
+ enum intel_pt_param_flags flags;
+ unsigned int quick;
+};
+
+struct intel_pt_decoder;
+
+struct intel_pt_decoder *intel_pt_decoder_new(struct intel_pt_params *params);
+void intel_pt_decoder_free(struct intel_pt_decoder *decoder);
+
+const struct intel_pt_state *intel_pt_decode(struct intel_pt_decoder *decoder);
+
+int intel_pt_fast_forward(struct intel_pt_decoder *decoder, uint64_t timestamp);
+
+unsigned char *intel_pt_find_overlap(unsigned char *buf_a, size_t len_a,
+ unsigned char *buf_b, size_t len_b,
+ bool have_tsc, bool *consecutive);
+
+int intel_pt__strerror(int code, char *buf, size_t buflen);
+
+#endif
diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.c b/tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.c
new file mode 100644
index 000000000..fb8a3558d
--- /dev/null
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.c
@@ -0,0 +1,273 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * intel_pt_insn_decoder.c: Intel Processor Trace support
+ * Copyright (c) 2013-2014, Intel Corporation.
+ */
+
+#include <linux/kernel.h>
+#include <stdio.h>
+#include <string.h>
+#include <endian.h>
+#include <byteswap.h>
+#include "../../../arch/x86/include/asm/insn.h"
+
+#include "../../../arch/x86/lib/inat.c"
+#include "../../../arch/x86/lib/insn.c"
+
+#include "event.h"
+
+#include "intel-pt-insn-decoder.h"
+#include "dump-insn.h"
+
+#if INTEL_PT_INSN_BUF_SZ < MAX_INSN_SIZE || INTEL_PT_INSN_BUF_SZ > MAX_INSN
+#error Instruction buffer size too small
+#endif
+
+/* Based on branch_type() from arch/x86/events/intel/lbr.c */
+static void intel_pt_insn_decoder(struct insn *insn,
+ struct intel_pt_insn *intel_pt_insn)
+{
+ enum intel_pt_insn_op op = INTEL_PT_OP_OTHER;
+ enum intel_pt_insn_branch branch = INTEL_PT_BR_NO_BRANCH;
+ int ext;
+
+ intel_pt_insn->rel = 0;
+
+ if (insn_is_avx(insn)) {
+ intel_pt_insn->op = INTEL_PT_OP_OTHER;
+ intel_pt_insn->branch = INTEL_PT_BR_NO_BRANCH;
+ intel_pt_insn->length = insn->length;
+ return;
+ }
+
+ switch (insn->opcode.bytes[0]) {
+ case 0xf:
+ switch (insn->opcode.bytes[1]) {
+ case 0x05: /* syscall */
+ case 0x34: /* sysenter */
+ op = INTEL_PT_OP_SYSCALL;
+ branch = INTEL_PT_BR_INDIRECT;
+ break;
+ case 0x07: /* sysret */
+ case 0x35: /* sysexit */
+ op = INTEL_PT_OP_SYSRET;
+ branch = INTEL_PT_BR_INDIRECT;
+ break;
+ case 0x80 ... 0x8f: /* jcc */
+ op = INTEL_PT_OP_JCC;
+ branch = INTEL_PT_BR_CONDITIONAL;
+ break;
+ default:
+ break;
+ }
+ break;
+ case 0x70 ... 0x7f: /* jcc */
+ op = INTEL_PT_OP_JCC;
+ branch = INTEL_PT_BR_CONDITIONAL;
+ break;
+ case 0xc2: /* near ret */
+ case 0xc3: /* near ret */
+ case 0xca: /* far ret */
+ case 0xcb: /* far ret */
+ op = INTEL_PT_OP_RET;
+ branch = INTEL_PT_BR_INDIRECT;
+ break;
+ case 0xcf: /* iret */
+ op = INTEL_PT_OP_IRET;
+ branch = INTEL_PT_BR_INDIRECT;
+ break;
+ case 0xcc ... 0xce: /* int */
+ op = INTEL_PT_OP_INT;
+ branch = INTEL_PT_BR_INDIRECT;
+ break;
+ case 0xe8: /* call near rel */
+ op = INTEL_PT_OP_CALL;
+ branch = INTEL_PT_BR_UNCONDITIONAL;
+ break;
+ case 0x9a: /* call far absolute */
+ op = INTEL_PT_OP_CALL;
+ branch = INTEL_PT_BR_INDIRECT;
+ break;
+ case 0xe0 ... 0xe2: /* loop */
+ op = INTEL_PT_OP_LOOP;
+ branch = INTEL_PT_BR_CONDITIONAL;
+ break;
+ case 0xe3: /* jcc */
+ op = INTEL_PT_OP_JCC;
+ branch = INTEL_PT_BR_CONDITIONAL;
+ break;
+ case 0xe9: /* jmp */
+ case 0xeb: /* jmp */
+ op = INTEL_PT_OP_JMP;
+ branch = INTEL_PT_BR_UNCONDITIONAL;
+ break;
+ case 0xea: /* far jmp */
+ op = INTEL_PT_OP_JMP;
+ branch = INTEL_PT_BR_INDIRECT;
+ break;
+ case 0xff: /* call near absolute, call far absolute ind */
+ ext = (insn->modrm.bytes[0] >> 3) & 0x7;
+ switch (ext) {
+ case 2: /* near ind call */
+ case 3: /* far ind call */
+ op = INTEL_PT_OP_CALL;
+ branch = INTEL_PT_BR_INDIRECT;
+ break;
+ case 4:
+ case 5:
+ op = INTEL_PT_OP_JMP;
+ branch = INTEL_PT_BR_INDIRECT;
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+
+ intel_pt_insn->op = op;
+ intel_pt_insn->branch = branch;
+ intel_pt_insn->length = insn->length;
+
+ if (branch == INTEL_PT_BR_CONDITIONAL ||
+ branch == INTEL_PT_BR_UNCONDITIONAL) {
+#if __BYTE_ORDER == __BIG_ENDIAN
+ switch (insn->immediate.nbytes) {
+ case 1:
+ intel_pt_insn->rel = insn->immediate.value;
+ break;
+ case 2:
+ intel_pt_insn->rel =
+ bswap_16((short)insn->immediate.value);
+ break;
+ case 4:
+ intel_pt_insn->rel = bswap_32(insn->immediate.value);
+ break;
+ default:
+ intel_pt_insn->rel = 0;
+ break;
+ }
+#else
+ intel_pt_insn->rel = insn->immediate.value;
+#endif
+ }
+}
+
+int intel_pt_get_insn(const unsigned char *buf, size_t len, int x86_64,
+ struct intel_pt_insn *intel_pt_insn)
+{
+ struct insn insn;
+
+ insn_init(&insn, buf, len, x86_64);
+ insn_get_length(&insn);
+ if (!insn_complete(&insn) || insn.length > len)
+ return -1;
+ intel_pt_insn_decoder(&insn, intel_pt_insn);
+ if (insn.length < INTEL_PT_INSN_BUF_SZ)
+ memcpy(intel_pt_insn->buf, buf, insn.length);
+ else
+ memcpy(intel_pt_insn->buf, buf, INTEL_PT_INSN_BUF_SZ);
+ return 0;
+}
+
+int arch_is_branch(const unsigned char *buf, size_t len, int x86_64)
+{
+ struct intel_pt_insn in;
+ if (intel_pt_get_insn(buf, len, x86_64, &in) < 0)
+ return -1;
+ return in.branch != INTEL_PT_BR_NO_BRANCH;
+}
+
+const char *dump_insn(struct perf_insn *x, uint64_t ip __maybe_unused,
+ u8 *inbuf, int inlen, int *lenp)
+{
+ struct insn insn;
+ int n, i;
+ int left;
+
+ insn_init(&insn, inbuf, inlen, x->is64bit);
+ insn_get_length(&insn);
+ if (!insn_complete(&insn) || insn.length > inlen)
+ return "<bad>";
+ if (lenp)
+ *lenp = insn.length;
+ left = sizeof(x->out);
+ n = snprintf(x->out, left, "insn: ");
+ left -= n;
+ for (i = 0; i < insn.length; i++) {
+ n += snprintf(x->out + n, left, "%02x ", inbuf[i]);
+ left -= n;
+ }
+ return x->out;
+}
+
+const char *branch_name[] = {
+ [INTEL_PT_OP_OTHER] = "Other",
+ [INTEL_PT_OP_CALL] = "Call",
+ [INTEL_PT_OP_RET] = "Ret",
+ [INTEL_PT_OP_JCC] = "Jcc",
+ [INTEL_PT_OP_JMP] = "Jmp",
+ [INTEL_PT_OP_LOOP] = "Loop",
+ [INTEL_PT_OP_IRET] = "IRet",
+ [INTEL_PT_OP_INT] = "Int",
+ [INTEL_PT_OP_SYSCALL] = "Syscall",
+ [INTEL_PT_OP_SYSRET] = "Sysret",
+};
+
+const char *intel_pt_insn_name(enum intel_pt_insn_op op)
+{
+ return branch_name[op];
+}
+
+int intel_pt_insn_desc(const struct intel_pt_insn *intel_pt_insn, char *buf,
+ size_t buf_len)
+{
+ switch (intel_pt_insn->branch) {
+ case INTEL_PT_BR_CONDITIONAL:
+ case INTEL_PT_BR_UNCONDITIONAL:
+ return snprintf(buf, buf_len, "%s %s%d",
+ intel_pt_insn_name(intel_pt_insn->op),
+ intel_pt_insn->rel > 0 ? "+" : "",
+ intel_pt_insn->rel);
+ case INTEL_PT_BR_NO_BRANCH:
+ case INTEL_PT_BR_INDIRECT:
+ return snprintf(buf, buf_len, "%s",
+ intel_pt_insn_name(intel_pt_insn->op));
+ default:
+ break;
+ }
+ return 0;
+}
+
+int intel_pt_insn_type(enum intel_pt_insn_op op)
+{
+ switch (op) {
+ case INTEL_PT_OP_OTHER:
+ return 0;
+ case INTEL_PT_OP_CALL:
+ return PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL;
+ case INTEL_PT_OP_RET:
+ return PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN;
+ case INTEL_PT_OP_JCC:
+ return PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CONDITIONAL;
+ case INTEL_PT_OP_JMP:
+ return PERF_IP_FLAG_BRANCH;
+ case INTEL_PT_OP_LOOP:
+ return PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CONDITIONAL;
+ case INTEL_PT_OP_IRET:
+ return PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN |
+ PERF_IP_FLAG_INTERRUPT;
+ case INTEL_PT_OP_INT:
+ return PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL |
+ PERF_IP_FLAG_INTERRUPT;
+ case INTEL_PT_OP_SYSCALL:
+ return PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL |
+ PERF_IP_FLAG_SYSCALLRET;
+ case INTEL_PT_OP_SYSRET:
+ return PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN |
+ PERF_IP_FLAG_SYSCALLRET;
+ default:
+ return 0;
+ }
+}
diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.h b/tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.h
new file mode 100644
index 000000000..95a1eb014
--- /dev/null
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.h
@@ -0,0 +1,54 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * intel_pt_insn_decoder.h: Intel Processor Trace support
+ * Copyright (c) 2013-2014, Intel Corporation.
+ */
+
+#ifndef INCLUDE__INTEL_PT_INSN_DECODER_H__
+#define INCLUDE__INTEL_PT_INSN_DECODER_H__
+
+#include <stddef.h>
+#include <stdint.h>
+
+#define INTEL_PT_INSN_DESC_MAX 32
+#define INTEL_PT_INSN_BUF_SZ 16
+
+enum intel_pt_insn_op {
+ INTEL_PT_OP_OTHER,
+ INTEL_PT_OP_CALL,
+ INTEL_PT_OP_RET,
+ INTEL_PT_OP_JCC,
+ INTEL_PT_OP_JMP,
+ INTEL_PT_OP_LOOP,
+ INTEL_PT_OP_IRET,
+ INTEL_PT_OP_INT,
+ INTEL_PT_OP_SYSCALL,
+ INTEL_PT_OP_SYSRET,
+};
+
+enum intel_pt_insn_branch {
+ INTEL_PT_BR_NO_BRANCH,
+ INTEL_PT_BR_INDIRECT,
+ INTEL_PT_BR_CONDITIONAL,
+ INTEL_PT_BR_UNCONDITIONAL,
+};
+
+struct intel_pt_insn {
+ enum intel_pt_insn_op op;
+ enum intel_pt_insn_branch branch;
+ int length;
+ int32_t rel;
+ unsigned char buf[INTEL_PT_INSN_BUF_SZ];
+};
+
+int intel_pt_get_insn(const unsigned char *buf, size_t len, int x86_64,
+ struct intel_pt_insn *intel_pt_insn);
+
+const char *intel_pt_insn_name(enum intel_pt_insn_op op);
+
+int intel_pt_insn_desc(const struct intel_pt_insn *intel_pt_insn, char *buf,
+ size_t buf_len);
+
+int intel_pt_insn_type(enum intel_pt_insn_op op);
+
+#endif
diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-log.c b/tools/perf/util/intel-pt-decoder/intel-pt-log.c
new file mode 100644
index 000000000..09feb5b07
--- /dev/null
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-log.c
@@ -0,0 +1,152 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * intel_pt_log.c: Intel Processor Trace support
+ * Copyright (c) 2013-2014, Intel Corporation.
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <string.h>
+
+#include "intel-pt-log.h"
+#include "intel-pt-insn-decoder.h"
+
+#include "intel-pt-pkt-decoder.h"
+
+#define MAX_LOG_NAME 256
+
+static FILE *f;
+static char log_name[MAX_LOG_NAME];
+bool intel_pt_enable_logging;
+
+void *intel_pt_log_fp(void)
+{
+ return f;
+}
+
+void intel_pt_log_enable(void)
+{
+ intel_pt_enable_logging = true;
+}
+
+void intel_pt_log_disable(void)
+{
+ if (f)
+ fflush(f);
+ intel_pt_enable_logging = false;
+}
+
+void intel_pt_log_set_name(const char *name)
+{
+ strncpy(log_name, name, MAX_LOG_NAME - 5);
+ strcat(log_name, ".log");
+}
+
+static void intel_pt_print_data(const unsigned char *buf, int len, uint64_t pos,
+ int indent)
+{
+ int i;
+
+ for (i = 0; i < indent; i++)
+ fprintf(f, " ");
+
+ fprintf(f, " %08" PRIx64 ": ", pos);
+ for (i = 0; i < len; i++)
+ fprintf(f, " %02x", buf[i]);
+ for (; i < 16; i++)
+ fprintf(f, " ");
+ fprintf(f, " ");
+}
+
+static void intel_pt_print_no_data(uint64_t pos, int indent)
+{
+ int i;
+
+ for (i = 0; i < indent; i++)
+ fprintf(f, " ");
+
+ fprintf(f, " %08" PRIx64 ": ", pos);
+ for (i = 0; i < 16; i++)
+ fprintf(f, " ");
+ fprintf(f, " ");
+}
+
+static int intel_pt_log_open(void)
+{
+ if (!intel_pt_enable_logging)
+ return -1;
+
+ if (f)
+ return 0;
+
+ if (!log_name[0])
+ return -1;
+
+ f = fopen(log_name, "w+");
+ if (!f) {
+ intel_pt_enable_logging = false;
+ return -1;
+ }
+
+ return 0;
+}
+
+void __intel_pt_log_packet(const struct intel_pt_pkt *packet, int pkt_len,
+ uint64_t pos, const unsigned char *buf)
+{
+ char desc[INTEL_PT_PKT_DESC_MAX];
+
+ if (intel_pt_log_open())
+ return;
+
+ intel_pt_print_data(buf, pkt_len, pos, 0);
+ intel_pt_pkt_desc(packet, desc, INTEL_PT_PKT_DESC_MAX);
+ fprintf(f, "%s\n", desc);
+}
+
+void __intel_pt_log_insn(struct intel_pt_insn *intel_pt_insn, uint64_t ip)
+{
+ char desc[INTEL_PT_INSN_DESC_MAX];
+ size_t len = intel_pt_insn->length;
+
+ if (intel_pt_log_open())
+ return;
+
+ if (len > INTEL_PT_INSN_BUF_SZ)
+ len = INTEL_PT_INSN_BUF_SZ;
+ intel_pt_print_data(intel_pt_insn->buf, len, ip, 8);
+ if (intel_pt_insn_desc(intel_pt_insn, desc, INTEL_PT_INSN_DESC_MAX) > 0)
+ fprintf(f, "%s\n", desc);
+ else
+ fprintf(f, "Bad instruction!\n");
+}
+
+void __intel_pt_log_insn_no_data(struct intel_pt_insn *intel_pt_insn,
+ uint64_t ip)
+{
+ char desc[INTEL_PT_INSN_DESC_MAX];
+
+ if (intel_pt_log_open())
+ return;
+
+ intel_pt_print_no_data(ip, 8);
+ if (intel_pt_insn_desc(intel_pt_insn, desc, INTEL_PT_INSN_DESC_MAX) > 0)
+ fprintf(f, "%s\n", desc);
+ else
+ fprintf(f, "Bad instruction!\n");
+}
+
+void __intel_pt_log(const char *fmt, ...)
+{
+ va_list args;
+
+ if (intel_pt_log_open())
+ return;
+
+ va_start(args, fmt);
+ vfprintf(f, fmt, args);
+ va_end(args);
+}
diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-log.h b/tools/perf/util/intel-pt-decoder/intel-pt-log.h
new file mode 100644
index 000000000..388661f89
--- /dev/null
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-log.h
@@ -0,0 +1,70 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * intel_pt_log.h: Intel Processor Trace support
+ * Copyright (c) 2013-2014, Intel Corporation.
+ */
+
+#ifndef INCLUDE__INTEL_PT_LOG_H__
+#define INCLUDE__INTEL_PT_LOG_H__
+
+#include <linux/compiler.h>
+#include <stdint.h>
+#include <inttypes.h>
+
+struct intel_pt_pkt;
+
+void *intel_pt_log_fp(void);
+void intel_pt_log_enable(void);
+void intel_pt_log_disable(void);
+void intel_pt_log_set_name(const char *name);
+
+void __intel_pt_log_packet(const struct intel_pt_pkt *packet, int pkt_len,
+ uint64_t pos, const unsigned char *buf);
+
+struct intel_pt_insn;
+
+void __intel_pt_log_insn(struct intel_pt_insn *intel_pt_insn, uint64_t ip);
+void __intel_pt_log_insn_no_data(struct intel_pt_insn *intel_pt_insn,
+ uint64_t ip);
+
+void __intel_pt_log(const char *fmt, ...) __printf(1, 2);
+
+#define intel_pt_log(fmt, ...) \
+ do { \
+ if (intel_pt_enable_logging) \
+ __intel_pt_log(fmt, ##__VA_ARGS__); \
+ } while (0)
+
+#define intel_pt_log_packet(arg, ...) \
+ do { \
+ if (intel_pt_enable_logging) \
+ __intel_pt_log_packet(arg, ##__VA_ARGS__); \
+ } while (0)
+
+#define intel_pt_log_insn(arg, ...) \
+ do { \
+ if (intel_pt_enable_logging) \
+ __intel_pt_log_insn(arg, ##__VA_ARGS__); \
+ } while (0)
+
+#define intel_pt_log_insn_no_data(arg, ...) \
+ do { \
+ if (intel_pt_enable_logging) \
+ __intel_pt_log_insn_no_data(arg, ##__VA_ARGS__); \
+ } while (0)
+
+#define x64_fmt "0x%" PRIx64
+
+extern bool intel_pt_enable_logging;
+
+static inline void intel_pt_log_at(const char *msg, uint64_t u)
+{
+ intel_pt_log("%s at " x64_fmt "\n", msg, u);
+}
+
+static inline void intel_pt_log_to(const char *msg, uint64_t u)
+{
+ intel_pt_log("%s to " x64_fmt "\n", msg, u);
+}
+
+#endif
diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c b/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c
new file mode 100644
index 000000000..4ce109993
--- /dev/null
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c
@@ -0,0 +1,763 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * intel_pt_pkt_decoder.c: Intel Processor Trace support
+ * Copyright (c) 2013-2014, Intel Corporation.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <endian.h>
+#include <byteswap.h>
+#include <linux/compiler.h>
+
+#include "intel-pt-pkt-decoder.h"
+
+#define BIT(n) (1 << (n))
+
+#define BIT63 ((uint64_t)1 << 63)
+
+#define NR_FLAG BIT63
+
+#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 packet_name[] = {
+ [INTEL_PT_BAD] = "Bad Packet!",
+ [INTEL_PT_PAD] = "PAD",
+ [INTEL_PT_TNT] = "TNT",
+ [INTEL_PT_TIP_PGD] = "TIP.PGD",
+ [INTEL_PT_TIP_PGE] = "TIP.PGE",
+ [INTEL_PT_TSC] = "TSC",
+ [INTEL_PT_TMA] = "TMA",
+ [INTEL_PT_MODE_EXEC] = "MODE.Exec",
+ [INTEL_PT_MODE_TSX] = "MODE.TSX",
+ [INTEL_PT_MTC] = "MTC",
+ [INTEL_PT_TIP] = "TIP",
+ [INTEL_PT_FUP] = "FUP",
+ [INTEL_PT_CYC] = "CYC",
+ [INTEL_PT_VMCS] = "VMCS",
+ [INTEL_PT_PSB] = "PSB",
+ [INTEL_PT_PSBEND] = "PSBEND",
+ [INTEL_PT_CBR] = "CBR",
+ [INTEL_PT_TRACESTOP] = "TraceSTOP",
+ [INTEL_PT_PIP] = "PIP",
+ [INTEL_PT_OVF] = "OVF",
+ [INTEL_PT_MNT] = "MNT",
+ [INTEL_PT_PTWRITE] = "PTWRITE",
+ [INTEL_PT_PTWRITE_IP] = "PTWRITE",
+ [INTEL_PT_EXSTOP] = "EXSTOP",
+ [INTEL_PT_EXSTOP_IP] = "EXSTOP",
+ [INTEL_PT_MWAIT] = "MWAIT",
+ [INTEL_PT_PWRE] = "PWRE",
+ [INTEL_PT_PWRX] = "PWRX",
+ [INTEL_PT_BBP] = "BBP",
+ [INTEL_PT_BIP] = "BIP",
+ [INTEL_PT_BEP] = "BEP",
+ [INTEL_PT_BEP_IP] = "BEP",
+};
+
+const char *intel_pt_pkt_name(enum intel_pt_pkt_type type)
+{
+ return packet_name[type];
+}
+
+static int intel_pt_get_long_tnt(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ uint64_t payload;
+ int count;
+
+ if (len < 8)
+ return INTEL_PT_NEED_MORE_BYTES;
+
+ payload = le64_to_cpu(*(uint64_t *)buf);
+
+ for (count = 47; count; count--) {
+ if (payload & BIT63)
+ break;
+ payload <<= 1;
+ }
+
+ packet->type = INTEL_PT_TNT;
+ packet->count = count;
+ packet->payload = payload << 1;
+ return 8;
+}
+
+static int intel_pt_get_pip(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ uint64_t payload = 0;
+
+ if (len < 8)
+ return INTEL_PT_NEED_MORE_BYTES;
+
+ packet->type = INTEL_PT_PIP;
+ memcpy_le64(&payload, buf + 2, 6);
+ packet->payload = payload >> 1;
+ if (payload & 1)
+ packet->payload |= NR_FLAG;
+
+ return 8;
+}
+
+static int intel_pt_get_tracestop(struct intel_pt_pkt *packet)
+{
+ packet->type = INTEL_PT_TRACESTOP;
+ return 2;
+}
+
+static int intel_pt_get_cbr(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ if (len < 4)
+ return INTEL_PT_NEED_MORE_BYTES;
+ packet->type = INTEL_PT_CBR;
+ packet->payload = le16_to_cpu(*(uint16_t *)(buf + 2));
+ return 4;
+}
+
+static int intel_pt_get_vmcs(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ unsigned int count = (52 - 5) >> 3;
+
+ if (count < 1 || count > 7)
+ return INTEL_PT_BAD_PACKET;
+
+ if (len < count + 2)
+ return INTEL_PT_NEED_MORE_BYTES;
+
+ packet->type = INTEL_PT_VMCS;
+ packet->count = count;
+ memcpy_le64(&packet->payload, buf + 2, count);
+
+ return count + 2;
+}
+
+static int intel_pt_get_ovf(struct intel_pt_pkt *packet)
+{
+ packet->type = INTEL_PT_OVF;
+ return 2;
+}
+
+static int intel_pt_get_psb(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ int i;
+
+ if (len < 16)
+ return INTEL_PT_NEED_MORE_BYTES;
+
+ for (i = 2; i < 16; i += 2) {
+ if (buf[i] != 2 || buf[i + 1] != 0x82)
+ return INTEL_PT_BAD_PACKET;
+ }
+
+ packet->type = INTEL_PT_PSB;
+ return 16;
+}
+
+static int intel_pt_get_psbend(struct intel_pt_pkt *packet)
+{
+ packet->type = INTEL_PT_PSBEND;
+ return 2;
+}
+
+static int intel_pt_get_tma(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ if (len < 7)
+ return INTEL_PT_NEED_MORE_BYTES;
+
+ packet->type = INTEL_PT_TMA;
+ packet->payload = buf[2] | (buf[3] << 8);
+ packet->count = buf[5] | ((buf[6] & BIT(0)) << 8);
+ return 7;
+}
+
+static int intel_pt_get_pad(struct intel_pt_pkt *packet)
+{
+ packet->type = INTEL_PT_PAD;
+ return 1;
+}
+
+static int intel_pt_get_mnt(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ if (len < 11)
+ return INTEL_PT_NEED_MORE_BYTES;
+ packet->type = INTEL_PT_MNT;
+ memcpy_le64(&packet->payload, buf + 3, 8);
+ return 11
+;
+}
+
+static int intel_pt_get_3byte(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ if (len < 3)
+ return INTEL_PT_NEED_MORE_BYTES;
+
+ switch (buf[2]) {
+ case 0x88: /* MNT */
+ return intel_pt_get_mnt(buf, len, packet);
+ default:
+ return INTEL_PT_BAD_PACKET;
+ }
+}
+
+static int intel_pt_get_ptwrite(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ packet->count = (buf[1] >> 5) & 0x3;
+ packet->type = buf[1] & BIT(7) ? INTEL_PT_PTWRITE_IP :
+ INTEL_PT_PTWRITE;
+
+ switch (packet->count) {
+ case 0:
+ if (len < 6)
+ return INTEL_PT_NEED_MORE_BYTES;
+ packet->payload = le32_to_cpu(*(uint32_t *)(buf + 2));
+ return 6;
+ case 1:
+ if (len < 10)
+ return INTEL_PT_NEED_MORE_BYTES;
+ packet->payload = le64_to_cpu(*(uint64_t *)(buf + 2));
+ return 10;
+ default:
+ return INTEL_PT_BAD_PACKET;
+ }
+}
+
+static int intel_pt_get_exstop(struct intel_pt_pkt *packet)
+{
+ packet->type = INTEL_PT_EXSTOP;
+ return 2;
+}
+
+static int intel_pt_get_exstop_ip(struct intel_pt_pkt *packet)
+{
+ packet->type = INTEL_PT_EXSTOP_IP;
+ return 2;
+}
+
+static int intel_pt_get_mwait(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ if (len < 10)
+ return INTEL_PT_NEED_MORE_BYTES;
+ packet->type = INTEL_PT_MWAIT;
+ packet->payload = le64_to_cpu(*(uint64_t *)(buf + 2));
+ return 10;
+}
+
+static int intel_pt_get_pwre(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ if (len < 4)
+ return INTEL_PT_NEED_MORE_BYTES;
+ packet->type = INTEL_PT_PWRE;
+ memcpy_le64(&packet->payload, buf + 2, 2);
+ return 4;
+}
+
+static int intel_pt_get_pwrx(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ if (len < 7)
+ return INTEL_PT_NEED_MORE_BYTES;
+ packet->type = INTEL_PT_PWRX;
+ memcpy_le64(&packet->payload, buf + 2, 5);
+ return 7;
+}
+
+static int intel_pt_get_bbp(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ if (len < 3)
+ return INTEL_PT_NEED_MORE_BYTES;
+ packet->type = INTEL_PT_BBP;
+ packet->count = buf[2] >> 7;
+ packet->payload = buf[2] & 0x1f;
+ return 3;
+}
+
+static int intel_pt_get_bip_4(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ if (len < 5)
+ return INTEL_PT_NEED_MORE_BYTES;
+ packet->type = INTEL_PT_BIP;
+ packet->count = buf[0] >> 3;
+ memcpy_le64(&packet->payload, buf + 1, 4);
+ return 5;
+}
+
+static int intel_pt_get_bip_8(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ if (len < 9)
+ return INTEL_PT_NEED_MORE_BYTES;
+ packet->type = INTEL_PT_BIP;
+ packet->count = buf[0] >> 3;
+ memcpy_le64(&packet->payload, buf + 1, 8);
+ return 9;
+}
+
+static int intel_pt_get_bep(size_t len, struct intel_pt_pkt *packet)
+{
+ if (len < 2)
+ return INTEL_PT_NEED_MORE_BYTES;
+ packet->type = INTEL_PT_BEP;
+ return 2;
+}
+
+static int intel_pt_get_bep_ip(size_t len, struct intel_pt_pkt *packet)
+{
+ if (len < 2)
+ return INTEL_PT_NEED_MORE_BYTES;
+ packet->type = INTEL_PT_BEP_IP;
+ return 2;
+}
+
+static int intel_pt_get_ext(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ if (len < 2)
+ return INTEL_PT_NEED_MORE_BYTES;
+
+ if ((buf[1] & 0x1f) == 0x12)
+ return intel_pt_get_ptwrite(buf, len, packet);
+
+ switch (buf[1]) {
+ case 0xa3: /* Long TNT */
+ return intel_pt_get_long_tnt(buf, len, packet);
+ case 0x43: /* PIP */
+ return intel_pt_get_pip(buf, len, packet);
+ case 0x83: /* TraceStop */
+ return intel_pt_get_tracestop(packet);
+ case 0x03: /* CBR */
+ return intel_pt_get_cbr(buf, len, packet);
+ case 0xc8: /* VMCS */
+ return intel_pt_get_vmcs(buf, len, packet);
+ case 0xf3: /* OVF */
+ return intel_pt_get_ovf(packet);
+ case 0x82: /* PSB */
+ return intel_pt_get_psb(buf, len, packet);
+ case 0x23: /* PSBEND */
+ return intel_pt_get_psbend(packet);
+ case 0x73: /* TMA */
+ return intel_pt_get_tma(buf, len, packet);
+ case 0xC3: /* 3-byte header */
+ return intel_pt_get_3byte(buf, len, packet);
+ case 0x62: /* EXSTOP no IP */
+ return intel_pt_get_exstop(packet);
+ case 0xE2: /* EXSTOP with IP */
+ return intel_pt_get_exstop_ip(packet);
+ case 0xC2: /* MWAIT */
+ return intel_pt_get_mwait(buf, len, packet);
+ case 0x22: /* PWRE */
+ return intel_pt_get_pwre(buf, len, packet);
+ case 0xA2: /* PWRX */
+ return intel_pt_get_pwrx(buf, len, packet);
+ case 0x63: /* BBP */
+ return intel_pt_get_bbp(buf, len, packet);
+ case 0x33: /* BEP no IP */
+ return intel_pt_get_bep(len, packet);
+ case 0xb3: /* BEP with IP */
+ return intel_pt_get_bep_ip(len, packet);
+ default:
+ return INTEL_PT_BAD_PACKET;
+ }
+}
+
+static int intel_pt_get_short_tnt(unsigned int byte,
+ struct intel_pt_pkt *packet)
+{
+ int count;
+
+ for (count = 6; count; count--) {
+ if (byte & BIT(7))
+ break;
+ byte <<= 1;
+ }
+
+ packet->type = INTEL_PT_TNT;
+ packet->count = count;
+ packet->payload = (uint64_t)byte << 57;
+
+ return 1;
+}
+
+static int intel_pt_get_cyc(unsigned int byte, const unsigned char *buf,
+ size_t len, struct intel_pt_pkt *packet)
+{
+ unsigned int offs = 1, shift;
+ uint64_t payload = byte >> 3;
+
+ byte >>= 2;
+ len -= 1;
+ for (shift = 5; byte & 1; shift += 7) {
+ if (offs > 9)
+ return INTEL_PT_BAD_PACKET;
+ if (len < offs)
+ return INTEL_PT_NEED_MORE_BYTES;
+ byte = buf[offs++];
+ payload |= ((uint64_t)byte >> 1) << shift;
+ }
+
+ packet->type = INTEL_PT_CYC;
+ packet->payload = payload;
+ return offs;
+}
+
+static int intel_pt_get_ip(enum intel_pt_pkt_type type, unsigned int byte,
+ const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ int ip_len;
+
+ packet->count = byte >> 5;
+
+ switch (packet->count) {
+ case 0:
+ ip_len = 0;
+ break;
+ case 1:
+ if (len < 3)
+ return INTEL_PT_NEED_MORE_BYTES;
+ ip_len = 2;
+ packet->payload = le16_to_cpu(*(uint16_t *)(buf + 1));
+ break;
+ case 2:
+ if (len < 5)
+ return INTEL_PT_NEED_MORE_BYTES;
+ ip_len = 4;
+ packet->payload = le32_to_cpu(*(uint32_t *)(buf + 1));
+ break;
+ case 3:
+ case 4:
+ if (len < 7)
+ return INTEL_PT_NEED_MORE_BYTES;
+ ip_len = 6;
+ memcpy_le64(&packet->payload, buf + 1, 6);
+ break;
+ case 6:
+ if (len < 9)
+ return INTEL_PT_NEED_MORE_BYTES;
+ ip_len = 8;
+ packet->payload = le64_to_cpu(*(uint64_t *)(buf + 1));
+ break;
+ default:
+ return INTEL_PT_BAD_PACKET;
+ }
+
+ packet->type = type;
+
+ return ip_len + 1;
+}
+
+static int intel_pt_get_mode(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ if (len < 2)
+ return INTEL_PT_NEED_MORE_BYTES;
+
+ switch (buf[1] >> 5) {
+ case 0:
+ packet->type = INTEL_PT_MODE_EXEC;
+ switch (buf[1] & 3) {
+ case 0:
+ packet->payload = 16;
+ break;
+ case 1:
+ packet->payload = 64;
+ break;
+ case 2:
+ packet->payload = 32;
+ break;
+ default:
+ return INTEL_PT_BAD_PACKET;
+ }
+ break;
+ case 1:
+ packet->type = INTEL_PT_MODE_TSX;
+ if ((buf[1] & 3) == 3)
+ return INTEL_PT_BAD_PACKET;
+ packet->payload = buf[1] & 3;
+ break;
+ default:
+ return INTEL_PT_BAD_PACKET;
+ }
+
+ return 2;
+}
+
+static int intel_pt_get_tsc(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ if (len < 8)
+ return INTEL_PT_NEED_MORE_BYTES;
+ packet->type = INTEL_PT_TSC;
+ memcpy_le64(&packet->payload, buf + 1, 7);
+ return 8;
+}
+
+static int intel_pt_get_mtc(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ if (len < 2)
+ return INTEL_PT_NEED_MORE_BYTES;
+ packet->type = INTEL_PT_MTC;
+ packet->payload = buf[1];
+ return 2;
+}
+
+static int intel_pt_do_get_packet(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet,
+ enum intel_pt_pkt_ctx ctx)
+{
+ unsigned int byte;
+
+ memset(packet, 0, sizeof(struct intel_pt_pkt));
+
+ if (!len)
+ return INTEL_PT_NEED_MORE_BYTES;
+
+ byte = buf[0];
+
+ switch (ctx) {
+ case INTEL_PT_NO_CTX:
+ break;
+ case INTEL_PT_BLK_4_CTX:
+ if ((byte & 0x7) == 4)
+ return intel_pt_get_bip_4(buf, len, packet);
+ break;
+ case INTEL_PT_BLK_8_CTX:
+ if ((byte & 0x7) == 4)
+ return intel_pt_get_bip_8(buf, len, packet);
+ break;
+ default:
+ break;
+ }
+
+ if (!(byte & BIT(0))) {
+ if (byte == 0)
+ return intel_pt_get_pad(packet);
+ if (byte == 2)
+ return intel_pt_get_ext(buf, len, packet);
+ return intel_pt_get_short_tnt(byte, packet);
+ }
+
+ if ((byte & 2))
+ return intel_pt_get_cyc(byte, buf, len, packet);
+
+ switch (byte & 0x1f) {
+ case 0x0D:
+ return intel_pt_get_ip(INTEL_PT_TIP, byte, buf, len, packet);
+ case 0x11:
+ return intel_pt_get_ip(INTEL_PT_TIP_PGE, byte, buf, len,
+ packet);
+ case 0x01:
+ return intel_pt_get_ip(INTEL_PT_TIP_PGD, byte, buf, len,
+ packet);
+ case 0x1D:
+ return intel_pt_get_ip(INTEL_PT_FUP, byte, buf, len, packet);
+ case 0x19:
+ switch (byte) {
+ case 0x99:
+ return intel_pt_get_mode(buf, len, packet);
+ case 0x19:
+ return intel_pt_get_tsc(buf, len, packet);
+ case 0x59:
+ return intel_pt_get_mtc(buf, len, packet);
+ default:
+ return INTEL_PT_BAD_PACKET;
+ }
+ default:
+ return INTEL_PT_BAD_PACKET;
+ }
+}
+
+void intel_pt_upd_pkt_ctx(const struct intel_pt_pkt *packet,
+ enum intel_pt_pkt_ctx *ctx)
+{
+ switch (packet->type) {
+ case INTEL_PT_BAD:
+ case INTEL_PT_PAD:
+ case INTEL_PT_TSC:
+ case INTEL_PT_TMA:
+ case INTEL_PT_MTC:
+ case INTEL_PT_FUP:
+ case INTEL_PT_CYC:
+ case INTEL_PT_CBR:
+ case INTEL_PT_MNT:
+ case INTEL_PT_EXSTOP:
+ case INTEL_PT_EXSTOP_IP:
+ case INTEL_PT_PWRE:
+ case INTEL_PT_PWRX:
+ case INTEL_PT_BIP:
+ break;
+ case INTEL_PT_TNT:
+ case INTEL_PT_TIP:
+ case INTEL_PT_TIP_PGD:
+ case INTEL_PT_TIP_PGE:
+ case INTEL_PT_MODE_EXEC:
+ case INTEL_PT_MODE_TSX:
+ case INTEL_PT_PIP:
+ case INTEL_PT_OVF:
+ case INTEL_PT_VMCS:
+ case INTEL_PT_TRACESTOP:
+ case INTEL_PT_PSB:
+ case INTEL_PT_PSBEND:
+ case INTEL_PT_PTWRITE:
+ case INTEL_PT_PTWRITE_IP:
+ case INTEL_PT_MWAIT:
+ case INTEL_PT_BEP:
+ case INTEL_PT_BEP_IP:
+ *ctx = INTEL_PT_NO_CTX;
+ break;
+ case INTEL_PT_BBP:
+ if (packet->count)
+ *ctx = INTEL_PT_BLK_4_CTX;
+ else
+ *ctx = INTEL_PT_BLK_8_CTX;
+ break;
+ default:
+ break;
+ }
+}
+
+int intel_pt_get_packet(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet, enum intel_pt_pkt_ctx *ctx)
+{
+ int ret;
+
+ ret = intel_pt_do_get_packet(buf, len, packet, *ctx);
+ if (ret > 0) {
+ while (ret < 8 && len > (size_t)ret && !buf[ret])
+ ret += 1;
+ intel_pt_upd_pkt_ctx(packet, ctx);
+ }
+ return ret;
+}
+
+int intel_pt_pkt_desc(const struct intel_pt_pkt *packet, char *buf,
+ size_t buf_len)
+{
+ int ret, i, nr;
+ unsigned long long payload = packet->payload;
+ const char *name = intel_pt_pkt_name(packet->type);
+
+ switch (packet->type) {
+ case INTEL_PT_BAD:
+ case INTEL_PT_PAD:
+ case INTEL_PT_PSB:
+ case INTEL_PT_PSBEND:
+ case INTEL_PT_TRACESTOP:
+ case INTEL_PT_OVF:
+ return snprintf(buf, buf_len, "%s", name);
+ case INTEL_PT_TNT: {
+ size_t blen = buf_len;
+
+ ret = snprintf(buf, blen, "%s ", name);
+ if (ret < 0)
+ return ret;
+ buf += ret;
+ blen -= ret;
+ for (i = 0; i < packet->count; i++) {
+ if (payload & BIT63)
+ ret = snprintf(buf, blen, "T");
+ else
+ ret = snprintf(buf, blen, "N");
+ if (ret < 0)
+ return ret;
+ buf += ret;
+ blen -= ret;
+ payload <<= 1;
+ }
+ ret = snprintf(buf, blen, " (%d)", packet->count);
+ if (ret < 0)
+ return ret;
+ blen -= ret;
+ return buf_len - blen;
+ }
+ case INTEL_PT_TIP_PGD:
+ case INTEL_PT_TIP_PGE:
+ case INTEL_PT_TIP:
+ case INTEL_PT_FUP:
+ if (!(packet->count))
+ return snprintf(buf, buf_len, "%s no ip", name);
+ __fallthrough;
+ case INTEL_PT_CYC:
+ case INTEL_PT_VMCS:
+ case INTEL_PT_MTC:
+ case INTEL_PT_MNT:
+ case INTEL_PT_CBR:
+ case INTEL_PT_TSC:
+ return snprintf(buf, buf_len, "%s 0x%llx", name, payload);
+ case INTEL_PT_TMA:
+ return snprintf(buf, buf_len, "%s CTC 0x%x FC 0x%x", name,
+ (unsigned)payload, packet->count);
+ case INTEL_PT_MODE_EXEC:
+ return snprintf(buf, buf_len, "%s %lld", name, payload);
+ case INTEL_PT_MODE_TSX:
+ return snprintf(buf, buf_len, "%s TXAbort:%u InTX:%u",
+ name, (unsigned)(payload >> 1) & 1,
+ (unsigned)payload & 1);
+ case INTEL_PT_PIP:
+ nr = packet->payload & NR_FLAG ? 1 : 0;
+ payload &= ~NR_FLAG;
+ ret = snprintf(buf, buf_len, "%s 0x%llx (NR=%d)",
+ name, payload, nr);
+ return ret;
+ case INTEL_PT_PTWRITE:
+ return snprintf(buf, buf_len, "%s 0x%llx IP:0", name, payload);
+ case INTEL_PT_PTWRITE_IP:
+ return snprintf(buf, buf_len, "%s 0x%llx IP:1", name, payload);
+ case INTEL_PT_BEP:
+ case INTEL_PT_EXSTOP:
+ return snprintf(buf, buf_len, "%s IP:0", name);
+ case INTEL_PT_BEP_IP:
+ case INTEL_PT_EXSTOP_IP:
+ return snprintf(buf, buf_len, "%s IP:1", name);
+ case INTEL_PT_MWAIT:
+ return snprintf(buf, buf_len, "%s 0x%llx Hints 0x%x Extensions 0x%x",
+ name, payload, (unsigned int)(payload & 0xff),
+ (unsigned int)((payload >> 32) & 0x3));
+ case INTEL_PT_PWRE:
+ return snprintf(buf, buf_len, "%s 0x%llx HW:%u CState:%u Sub-CState:%u",
+ name, payload, !!(payload & 0x80),
+ (unsigned int)((payload >> 12) & 0xf),
+ (unsigned int)((payload >> 8) & 0xf));
+ case INTEL_PT_PWRX:
+ return snprintf(buf, buf_len, "%s 0x%llx Last CState:%u Deepest CState:%u Wake Reason 0x%x",
+ name, payload,
+ (unsigned int)((payload >> 4) & 0xf),
+ (unsigned int)(payload & 0xf),
+ (unsigned int)((payload >> 8) & 0xf));
+ case INTEL_PT_BBP:
+ return snprintf(buf, buf_len, "%s SZ %s-byte Type 0x%llx",
+ name, packet->count ? "4" : "8", payload);
+ case INTEL_PT_BIP:
+ return snprintf(buf, buf_len, "%s ID 0x%02x Value 0x%llx",
+ name, packet->count, payload);
+ default:
+ break;
+ }
+ return snprintf(buf, buf_len, "%s 0x%llx (%d)",
+ name, payload, packet->count);
+}
diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.h b/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.h
new file mode 100644
index 000000000..17ca9b56d
--- /dev/null
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.h
@@ -0,0 +1,87 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * intel_pt_pkt_decoder.h: Intel Processor Trace support
+ * Copyright (c) 2013-2014, Intel Corporation.
+ */
+
+#ifndef INCLUDE__INTEL_PT_PKT_DECODER_H__
+#define INCLUDE__INTEL_PT_PKT_DECODER_H__
+
+#include <stddef.h>
+#include <stdint.h>
+
+#define INTEL_PT_PKT_DESC_MAX 256
+
+#define INTEL_PT_NEED_MORE_BYTES -1
+#define INTEL_PT_BAD_PACKET -2
+
+#define INTEL_PT_PSB_STR "\002\202\002\202\002\202\002\202" \
+ "\002\202\002\202\002\202\002\202"
+#define INTEL_PT_PSB_LEN 16
+
+#define INTEL_PT_PKT_MAX_SZ 16
+
+enum intel_pt_pkt_type {
+ INTEL_PT_BAD,
+ INTEL_PT_PAD,
+ INTEL_PT_TNT,
+ INTEL_PT_TIP_PGD,
+ INTEL_PT_TIP_PGE,
+ INTEL_PT_TSC,
+ INTEL_PT_TMA,
+ INTEL_PT_MODE_EXEC,
+ INTEL_PT_MODE_TSX,
+ INTEL_PT_MTC,
+ INTEL_PT_TIP,
+ INTEL_PT_FUP,
+ INTEL_PT_CYC,
+ INTEL_PT_VMCS,
+ INTEL_PT_PSB,
+ INTEL_PT_PSBEND,
+ INTEL_PT_CBR,
+ INTEL_PT_TRACESTOP,
+ INTEL_PT_PIP,
+ INTEL_PT_OVF,
+ INTEL_PT_MNT,
+ INTEL_PT_PTWRITE,
+ INTEL_PT_PTWRITE_IP,
+ INTEL_PT_EXSTOP,
+ INTEL_PT_EXSTOP_IP,
+ INTEL_PT_MWAIT,
+ INTEL_PT_PWRE,
+ INTEL_PT_PWRX,
+ INTEL_PT_BBP,
+ INTEL_PT_BIP,
+ INTEL_PT_BEP,
+ INTEL_PT_BEP_IP,
+};
+
+struct intel_pt_pkt {
+ enum intel_pt_pkt_type type;
+ int count;
+ uint64_t payload;
+};
+
+/*
+ * Decoding of BIP packets conflicts with single-byte TNT packets. Since BIP
+ * packets only occur in the context of a block (i.e. between BBP and BEP), that
+ * context must be recorded and passed to the packet decoder.
+ */
+enum intel_pt_pkt_ctx {
+ INTEL_PT_NO_CTX, /* BIP packets are invalid */
+ INTEL_PT_BLK_4_CTX, /* 4-byte BIP packets */
+ INTEL_PT_BLK_8_CTX, /* 8-byte BIP packets */
+};
+
+const char *intel_pt_pkt_name(enum intel_pt_pkt_type);
+
+int intel_pt_get_packet(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet,
+ enum intel_pt_pkt_ctx *ctx);
+
+void intel_pt_upd_pkt_ctx(const struct intel_pt_pkt *packet,
+ enum intel_pt_pkt_ctx *ctx);
+
+int intel_pt_pkt_desc(const struct intel_pt_pkt *packet, char *buf, size_t len);
+
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-06 11:47:55 +0000