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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * intel_pt_decoder.h: Intel Processor Trace support4 * Copyright (c) 2013-2014, Intel Corporation.5 */6 7#ifndef INCLUDE__INTEL_PT_DECODER_H__8#define INCLUDE__INTEL_PT_DECODER_H__9 10#include <stdint.h>11#include <stddef.h>12#include <stdbool.h>13 14#include <linux/rbtree.h>15 16#include "intel-pt-insn-decoder.h"17 18#define INTEL_PT_IN_TX		(1 << 0)19#define INTEL_PT_ABORT_TX	(1 << 1)20#define INTEL_PT_IFLAG		(1 << 2)21#define INTEL_PT_ASYNC		(1 << 2)22#define INTEL_PT_FUP_IP		(1 << 3)23#define INTEL_PT_SAMPLE_IPC	(1 << 4)24 25enum intel_pt_sample_type {26	INTEL_PT_BRANCH		= 1 << 0,27	INTEL_PT_INSTRUCTION	= 1 << 1,28	INTEL_PT_TRANSACTION	= 1 << 2,29	INTEL_PT_PTW		= 1 << 3,30	INTEL_PT_MWAIT_OP	= 1 << 4,31	INTEL_PT_PWR_ENTRY	= 1 << 5,32	INTEL_PT_EX_STOP	= 1 << 6,33	INTEL_PT_PWR_EXIT	= 1 << 7,34	INTEL_PT_CBR_CHG	= 1 << 8,35	INTEL_PT_TRACE_BEGIN	= 1 << 9,36	INTEL_PT_TRACE_END	= 1 << 10,37	INTEL_PT_BLK_ITEMS	= 1 << 11,38	INTEL_PT_PSB_EVT	= 1 << 12,39	INTEL_PT_EVT		= 1 << 13,40	INTEL_PT_IFLAG_CHG	= 1 << 14,41};42 43enum intel_pt_period_type {44	INTEL_PT_PERIOD_NONE,45	INTEL_PT_PERIOD_INSTRUCTIONS,46	INTEL_PT_PERIOD_TICKS,47	INTEL_PT_PERIOD_MTC,48};49 50enum {51	INTEL_PT_ERR_NOMEM = 1,52	INTEL_PT_ERR_INTERN,53	INTEL_PT_ERR_BADPKT,54	INTEL_PT_ERR_NODATA,55	INTEL_PT_ERR_NOINSN,56	INTEL_PT_ERR_MISMAT,57	INTEL_PT_ERR_OVR,58	INTEL_PT_ERR_LOST,59	INTEL_PT_ERR_UNK,60	INTEL_PT_ERR_NELOOP,61	INTEL_PT_ERR_EPTW,62	INTEL_PT_ERR_MAX,63};64 65enum intel_pt_param_flags {66	/*67	 * FUP packet can contain next linear instruction pointer instead of68	 * current linear instruction pointer.69	 */70	INTEL_PT_FUP_WITH_NLIP	= 1 << 0,71};72 73enum intel_pt_blk_type {74	INTEL_PT_GP_REGS	= 1,75	INTEL_PT_PEBS_BASIC	= 4,76	INTEL_PT_PEBS_MEM	= 5,77	INTEL_PT_LBR_0		= 8,78	INTEL_PT_LBR_1		= 9,79	INTEL_PT_LBR_2		= 10,80	INTEL_PT_XMM		= 16,81	INTEL_PT_BLK_TYPE_MAX82};83 84/*85 * The block type numbers are not sequential but here they are given sequential86 * positions to avoid wasting space for array placement.87 */88enum intel_pt_blk_type_pos {89	INTEL_PT_GP_REGS_POS,90	INTEL_PT_PEBS_BASIC_POS,91	INTEL_PT_PEBS_MEM_POS,92	INTEL_PT_LBR_0_POS,93	INTEL_PT_LBR_1_POS,94	INTEL_PT_LBR_2_POS,95	INTEL_PT_XMM_POS,96	INTEL_PT_BLK_TYPE_CNT97};98 99/* Get the array position for a block type */100static inline int intel_pt_blk_type_pos(enum intel_pt_blk_type blk_type)101{102#define BLK_TYPE(bt) [INTEL_PT_##bt] = INTEL_PT_##bt##_POS + 1103	const int map[INTEL_PT_BLK_TYPE_MAX] = {104		BLK_TYPE(GP_REGS),105		BLK_TYPE(PEBS_BASIC),106		BLK_TYPE(PEBS_MEM),107		BLK_TYPE(LBR_0),108		BLK_TYPE(LBR_1),109		BLK_TYPE(LBR_2),110		BLK_TYPE(XMM),111	};112#undef BLK_TYPE113 114	return blk_type < INTEL_PT_BLK_TYPE_MAX ? map[blk_type] - 1 : -1;115}116 117#define INTEL_PT_BLK_ITEM_ID_CNT	32118 119/*120 * Use unions so that the block items can be accessed by name or by array index.121 * There is an array of 32-bit masks for each block type, which indicate which122 * values are present. Then arrays of 32 64-bit values for each block type.123 */124struct intel_pt_blk_items {125	union {126		uint32_t mask[INTEL_PT_BLK_TYPE_CNT];127		struct {128			uint32_t has_rflags:1;129			uint32_t has_rip:1;130			uint32_t has_rax:1;131			uint32_t has_rcx:1;132			uint32_t has_rdx:1;133			uint32_t has_rbx:1;134			uint32_t has_rsp:1;135			uint32_t has_rbp:1;136			uint32_t has_rsi:1;137			uint32_t has_rdi:1;138			uint32_t has_r8:1;139			uint32_t has_r9:1;140			uint32_t has_r10:1;141			uint32_t has_r11:1;142			uint32_t has_r12:1;143			uint32_t has_r13:1;144			uint32_t has_r14:1;145			uint32_t has_r15:1;146			uint32_t has_unused_0:14;147			uint32_t has_ip:1;148			uint32_t has_applicable_counters:1;149			uint32_t has_timestamp:1;150			uint32_t has_unused_1:29;151			uint32_t has_mem_access_address:1;152			uint32_t has_mem_aux_info:1;153			uint32_t has_mem_access_latency:1;154			uint32_t has_tsx_aux_info:1;155			uint32_t has_unused_2:28;156			uint32_t has_lbr_0;157			uint32_t has_lbr_1;158			uint32_t has_lbr_2;159			uint32_t has_xmm;160		};161	};162	union {163		uint64_t val[INTEL_PT_BLK_TYPE_CNT][INTEL_PT_BLK_ITEM_ID_CNT];164		struct {165			struct {166				uint64_t rflags;167				uint64_t rip;168				uint64_t rax;169				uint64_t rcx;170				uint64_t rdx;171				uint64_t rbx;172				uint64_t rsp;173				uint64_t rbp;174				uint64_t rsi;175				uint64_t rdi;176				uint64_t r8;177				uint64_t r9;178				uint64_t r10;179				uint64_t r11;180				uint64_t r12;181				uint64_t r13;182				uint64_t r14;183				uint64_t r15;184				uint64_t unused_0[INTEL_PT_BLK_ITEM_ID_CNT - 18];185			};186			struct {187				uint64_t ip;188				uint64_t applicable_counters;189				uint64_t timestamp;190				uint64_t unused_1[INTEL_PT_BLK_ITEM_ID_CNT - 3];191			};192			struct {193				uint64_t mem_access_address;194				uint64_t mem_aux_info;195				uint64_t mem_access_latency;196				uint64_t tsx_aux_info;197				uint64_t unused_2[INTEL_PT_BLK_ITEM_ID_CNT - 4];198			};199			uint64_t lbr_0[INTEL_PT_BLK_ITEM_ID_CNT];200			uint64_t lbr_1[INTEL_PT_BLK_ITEM_ID_CNT];201			uint64_t lbr_2[INTEL_PT_BLK_ITEM_ID_CNT];202			uint64_t xmm[INTEL_PT_BLK_ITEM_ID_CNT];203		};204	};205	bool is_32_bit;206};207 208struct intel_pt_vmcs_info {209	struct rb_node rb_node;210	uint64_t vmcs;211	uint64_t tsc_offset;212	bool reliable;213	bool error_printed;214};215 216/*217 * Maximum number of event trace data in one go, assuming at most 1 per type218 * and 6-bits of type in the EVD packet.219 */220#define INTEL_PT_MAX_EVDS 64221 222/* Event trace data from EVD packet */223struct intel_pt_evd {224	int type;225	uint64_t payload;226};227 228struct intel_pt_state {229	enum intel_pt_sample_type type;230	bool from_nr;231	bool to_nr;232	bool from_iflag;233	bool to_iflag;234	int err;235	uint64_t from_ip;236	uint64_t to_ip;237	uint64_t tot_insn_cnt;238	uint64_t tot_cyc_cnt;239	uint64_t cycles;240	uint64_t timestamp;241	uint64_t est_timestamp;242	uint64_t trace_nr;243	uint64_t ptw_payload;244	uint64_t mwait_payload;245	uint64_t pwre_payload;246	uint64_t pwrx_payload;247	uint64_t cbr_payload;248	uint64_t psb_offset;249	uint32_t cbr;250	uint32_t flags;251	enum intel_pt_insn_op insn_op;252	int insn_len;253	char insn[INTEL_PT_INSN_BUF_SZ];254	struct intel_pt_blk_items items;255	int cfe_type;256	int cfe_vector;257	int evd_cnt;258	struct intel_pt_evd *evd;259};260 261struct intel_pt_insn;262 263struct intel_pt_buffer {264	const unsigned char *buf;265	size_t len;266	bool consecutive;267	uint64_t ref_timestamp;268	uint64_t trace_nr;269};270 271typedef int (*intel_pt_lookahead_cb_t)(struct intel_pt_buffer *, void *);272 273struct intel_pt_params {274	int (*get_trace)(struct intel_pt_buffer *buffer, void *data);275	int (*walk_insn)(struct intel_pt_insn *intel_pt_insn,276			 uint64_t *insn_cnt_ptr, uint64_t *ip, uint64_t to_ip,277			 uint64_t max_insn_cnt, void *data);278	bool (*pgd_ip)(uint64_t ip, void *data);279	int (*lookahead)(void *data, intel_pt_lookahead_cb_t cb, void *cb_data);280	struct intel_pt_vmcs_info *(*findnew_vmcs_info)(void *data, uint64_t vmcs);281	void *data;282	bool return_compression;283	bool branch_enable;284	bool vm_time_correlation;285	bool vm_tm_corr_dry_run;286	uint64_t first_timestamp;287	uint64_t ctl;288	uint64_t period;289	enum intel_pt_period_type period_type;290	unsigned max_non_turbo_ratio;291	unsigned int mtc_period;292	uint32_t tsc_ctc_ratio_n;293	uint32_t tsc_ctc_ratio_d;294	enum intel_pt_param_flags flags;295	unsigned int quick;296	int max_loops;297};298 299struct intel_pt_decoder;300 301struct intel_pt_decoder *intel_pt_decoder_new(struct intel_pt_params *params);302void intel_pt_decoder_free(struct intel_pt_decoder *decoder);303 304const struct intel_pt_state *intel_pt_decode(struct intel_pt_decoder *decoder);305 306int intel_pt_fast_forward(struct intel_pt_decoder *decoder, uint64_t timestamp);307 308unsigned char *intel_pt_find_overlap(unsigned char *buf_a, size_t len_a,309				     unsigned char *buf_b, size_t len_b,310				     bool have_tsc, bool *consecutive,311				     bool ooo_tsc);312 313int intel_pt__strerror(int code, char *buf, size_t buflen);314 315void intel_pt_set_first_timestamp(struct intel_pt_decoder *decoder,316				  uint64_t first_timestamp);317 318#endif319