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/* 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
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