Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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