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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Arm Statistical Profiling Extensions (SPE) support
* Copyright (c) 2017-2018, Arm Ltd.
*/
#ifndef INCLUDE__ARM_SPE_PKT_DECODER_H__
#define INCLUDE__ARM_SPE_PKT_DECODER_H__
#include <stddef.h>
#include <stdint.h>
#define ARM_SPE_PKT_DESC_MAX 256
#define ARM_SPE_NEED_MORE_BYTES -1
#define ARM_SPE_BAD_PACKET -2
#define ARM_SPE_PKT_MAX_SZ 16
enum arm_spe_pkt_type {
ARM_SPE_BAD,
ARM_SPE_PAD,
ARM_SPE_END,
ARM_SPE_TIMESTAMP,
ARM_SPE_ADDRESS,
ARM_SPE_COUNTER,
ARM_SPE_CONTEXT,
ARM_SPE_OP_TYPE,
ARM_SPE_EVENTS,
ARM_SPE_DATA_SOURCE,
};
struct arm_spe_pkt {
enum arm_spe_pkt_type type;
unsigned char index;
uint64_t payload;
};
/* Short header (HEADER0) and extended header (HEADER1) */
#define SPE_HEADER0_PAD 0x0
#define SPE_HEADER0_END 0x1
#define SPE_HEADER0_TIMESTAMP 0x71
/* Mask for event & data source */
#define SPE_HEADER0_MASK1 (GENMASK_ULL(7, 6) | GENMASK_ULL(3, 0))
#define SPE_HEADER0_EVENTS 0x42
#define SPE_HEADER0_SOURCE 0x43
/* Mask for context & operation */
#define SPE_HEADER0_MASK2 GENMASK_ULL(7, 2)
#define SPE_HEADER0_CONTEXT 0x64
#define SPE_HEADER0_OP_TYPE 0x48
/* Mask for extended format */
#define SPE_HEADER0_EXTENDED 0x20
/* Mask for address & counter */
#define SPE_HEADER0_MASK3 GENMASK_ULL(7, 3)
#define SPE_HEADER0_ADDRESS 0xb0
#define SPE_HEADER0_COUNTER 0x98
#define SPE_HEADER1_ALIGNMENT 0x0
#define SPE_HDR_SHORT_INDEX(h) ((h) & GENMASK_ULL(2, 0))
#define SPE_HDR_EXTENDED_INDEX(h0, h1) (((h0) & GENMASK_ULL(1, 0)) << 3 | \
SPE_HDR_SHORT_INDEX(h1))
/* Address packet header */
#define SPE_ADDR_PKT_HDR_INDEX_INS 0x0
#define SPE_ADDR_PKT_HDR_INDEX_BRANCH 0x1
#define SPE_ADDR_PKT_HDR_INDEX_DATA_VIRT 0x2
#define SPE_ADDR_PKT_HDR_INDEX_DATA_PHYS 0x3
/* Address packet payload */
#define SPE_ADDR_PKT_ADDR_BYTE7_SHIFT 56
#define SPE_ADDR_PKT_ADDR_GET_BYTES_0_6(v) ((v) & GENMASK_ULL(55, 0))
#define SPE_ADDR_PKT_ADDR_GET_BYTE_6(v) (((v) & GENMASK_ULL(55, 48)) >> 48)
#define SPE_ADDR_PKT_GET_NS(v) (((v) & BIT_ULL(63)) >> 63)
#define SPE_ADDR_PKT_GET_EL(v) (((v) & GENMASK_ULL(62, 61)) >> 61)
#define SPE_ADDR_PKT_GET_CH(v) (((v) & BIT_ULL(62)) >> 62)
#define SPE_ADDR_PKT_GET_PAT(v) (((v) & GENMASK_ULL(59, 56)) >> 56)
#define SPE_ADDR_PKT_EL0 0
#define SPE_ADDR_PKT_EL1 1
#define SPE_ADDR_PKT_EL2 2
#define SPE_ADDR_PKT_EL3 3
/* Context packet header */
#define SPE_CTX_PKT_HDR_INDEX(h) ((h) & GENMASK_ULL(1, 0))
/* Counter packet header */
#define SPE_CNT_PKT_HDR_INDEX_TOTAL_LAT 0x0
#define SPE_CNT_PKT_HDR_INDEX_ISSUE_LAT 0x1
#define SPE_CNT_PKT_HDR_INDEX_TRANS_LAT 0x2
/* Event packet payload */
enum arm_spe_events {
EV_EXCEPTION_GEN = 0,
EV_RETIRED = 1,
EV_L1D_ACCESS = 2,
EV_L1D_REFILL = 3,
EV_TLB_ACCESS = 4,
EV_TLB_WALK = 5,
EV_NOT_TAKEN = 6,
EV_MISPRED = 7,
EV_LLC_ACCESS = 8,
EV_LLC_MISS = 9,
EV_REMOTE_ACCESS = 10,
EV_ALIGNMENT = 11,
EV_PARTIAL_PREDICATE = 17,
EV_EMPTY_PREDICATE = 18,
};
/* Operation packet header */
#define SPE_OP_PKT_HDR_CLASS(h) ((h) & GENMASK_ULL(1, 0))
#define SPE_OP_PKT_HDR_CLASS_OTHER 0x0
#define SPE_OP_PKT_HDR_CLASS_LD_ST_ATOMIC 0x1
#define SPE_OP_PKT_HDR_CLASS_BR_ERET 0x2
#define SPE_OP_PKT_IS_OTHER_SVE_OP(v) (((v) & (BIT(7) | BIT(3) | BIT(0))) == 0x8)
#define SPE_OP_PKT_COND BIT(0)
#define SPE_OP_PKT_LDST_SUBCLASS_GET(v) ((v) & GENMASK_ULL(7, 1))
#define SPE_OP_PKT_LDST_SUBCLASS_GP_REG 0x0
#define SPE_OP_PKT_LDST_SUBCLASS_SIMD_FP 0x4
#define SPE_OP_PKT_LDST_SUBCLASS_UNSPEC_REG 0x10
#define SPE_OP_PKT_LDST_SUBCLASS_NV_SYSREG 0x30
#define SPE_OP_PKT_IS_LDST_ATOMIC(v) (((v) & (GENMASK_ULL(7, 5) | BIT(1))) == 0x2)
#define SPE_OP_PKT_AR BIT(4)
#define SPE_OP_PKT_EXCL BIT(3)
#define SPE_OP_PKT_AT BIT(2)
#define SPE_OP_PKT_ST BIT(0)
#define SPE_OP_PKT_IS_LDST_SVE(v) (((v) & (BIT(3) | BIT(1))) == 0x8)
#define SPE_OP_PKT_SVE_SG BIT(7)
/*
* SVE effective vector length (EVL) is stored in byte 0 bits [6:4];
* the length is rounded up to a power of two and use 32 as one step,
* so EVL calculation is:
*
* 32 * (2 ^ bits [6:4]) = 32 << (bits [6:4])
*/
#define SPE_OP_PKG_SVE_EVL(v) (32 << (((v) & GENMASK_ULL(6, 4)) >> 4))
#define SPE_OP_PKT_SVE_PRED BIT(2)
#define SPE_OP_PKT_SVE_FP BIT(1)
#define SPE_OP_PKT_IS_INDIRECT_BRANCH(v) (((v) & GENMASK_ULL(7, 1)) == 0x2)
const char *arm_spe_pkt_name(enum arm_spe_pkt_type);
int arm_spe_get_packet(const unsigned char *buf, size_t len,
struct arm_spe_pkt *packet);
int arm_spe_pkt_desc(const struct arm_spe_pkt *packet, char *buf, size_t len);
#endif
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