mirror of
https://github.com/torvalds/linux
synced 2024-10-23 03:37:40 +00:00
79b58424b8
MTC packets provide finer grain timestamp information than TSC packets. MTC packets record time using the hardware crystal clock (CTC) which is related to TSC packets using a TMA packet. This patch just adds decoder support. Support for a default value and validation of values is provided by a later patch. Also documentation is updated in a separate patch. For details refer to the June 2015 or later Intel 64 and IA-32 Architectures SDM Chapter 36 Intel Processor Trace. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/1437150840-31811-21-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
110 lines
2.6 KiB
C
110 lines
2.6 KiB
C
/*
|
|
* intel_pt_decoder.h: Intel Processor Trace support
|
|
* Copyright (c) 2013-2014, Intel Corporation.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
*/
|
|
|
|
#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)
|
|
|
|
enum intel_pt_sample_type {
|
|
INTEL_PT_BRANCH = 1 << 0,
|
|
INTEL_PT_INSTRUCTION = 1 << 1,
|
|
INTEL_PT_TRANSACTION = 1 << 2,
|
|
};
|
|
|
|
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,
|
|
};
|
|
|
|
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 timestamp;
|
|
uint64_t est_timestamp;
|
|
uint64_t trace_nr;
|
|
uint32_t flags;
|
|
enum intel_pt_insn_op insn_op;
|
|
int insn_len;
|
|
};
|
|
|
|
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;
|
|
};
|
|
|
|
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);
|
|
void *data;
|
|
bool return_compression;
|
|
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;
|
|
};
|
|
|
|
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);
|
|
|
|
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);
|
|
|
|
int intel_pt__strerror(int code, char *buf, size_t buflen);
|
|
|
|
#endif
|