| Alexander Shishkin | 52ca9ce | 2015-01-30 12:39:52 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Intel(R) Processor Trace PMU driver for perf |
| 3 | * Copyright (c) 2013-2014, Intel Corporation. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms and conditions of the GNU General Public License, |
| 7 | * version 2, as published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 12 | * more details. |
| 13 | * |
| 14 | * Intel PT is specified in the Intel Architecture Instruction Set Extensions |
| 15 | * Programming Reference: |
| 16 | * http://software.intel.com/en-us/intel-isa-extensions |
| 17 | */ |
| 18 | |
| 19 | #ifndef __INTEL_PT_H__ |
| 20 | #define __INTEL_PT_H__ |
| 21 | |
| 22 | /* |
| 23 | * Single-entry ToPA: when this close to region boundary, switch |
| 24 | * buffers to avoid losing data. |
| 25 | */ |
| 26 | #define TOPA_PMI_MARGIN 512 |
| 27 | |
| 28 | /* |
| 29 | * Table of Physical Addresses bits |
| 30 | */ |
| 31 | enum topa_sz { |
| 32 | TOPA_4K = 0, |
| 33 | TOPA_8K, |
| 34 | TOPA_16K, |
| 35 | TOPA_32K, |
| 36 | TOPA_64K, |
| 37 | TOPA_128K, |
| 38 | TOPA_256K, |
| 39 | TOPA_512K, |
| 40 | TOPA_1MB, |
| 41 | TOPA_2MB, |
| 42 | TOPA_4MB, |
| 43 | TOPA_8MB, |
| 44 | TOPA_16MB, |
| 45 | TOPA_32MB, |
| 46 | TOPA_64MB, |
| 47 | TOPA_128MB, |
| 48 | TOPA_SZ_END, |
| 49 | }; |
| 50 | |
| 51 | static inline unsigned int sizes(enum topa_sz tsz) |
| 52 | { |
| 53 | return 1 << (tsz + 12); |
| 54 | }; |
| 55 | |
| 56 | struct topa_entry { |
| 57 | u64 end : 1; |
| 58 | u64 rsvd0 : 1; |
| 59 | u64 intr : 1; |
| 60 | u64 rsvd1 : 1; |
| 61 | u64 stop : 1; |
| 62 | u64 rsvd2 : 1; |
| 63 | u64 size : 4; |
| 64 | u64 rsvd3 : 2; |
| 65 | u64 base : 36; |
| 66 | u64 rsvd4 : 16; |
| 67 | }; |
| 68 | |
| 69 | #define TOPA_SHIFT 12 |
| 70 | #define PT_CPUID_LEAVES 2 |
| 71 | |
| 72 | enum pt_capabilities { |
| 73 | PT_CAP_max_subleaf = 0, |
| 74 | PT_CAP_cr3_filtering, |
| 75 | PT_CAP_topa_output, |
| 76 | PT_CAP_topa_multiple_entries, |
| 77 | PT_CAP_payloads_lip, |
| 78 | }; |
| 79 | |
| 80 | struct pt_pmu { |
| 81 | struct pmu pmu; |
| 82 | u32 caps[4 * PT_CPUID_LEAVES]; |
| 83 | }; |
| 84 | |
| 85 | /** |
| 86 | * struct pt_buffer - buffer configuration; one buffer per task_struct or |
| 87 | * cpu, depending on perf event configuration |
| 88 | * @cpu: cpu for per-cpu allocation |
| 89 | * @tables: list of ToPA tables in this buffer |
| 90 | * @first: shorthand for first topa table |
| 91 | * @last: shorthand for last topa table |
| 92 | * @cur: current topa table |
| 93 | * @nr_pages: buffer size in pages |
| 94 | * @cur_idx: current output region's index within @cur table |
| 95 | * @output_off: offset within the current output region |
| 96 | * @data_size: running total of the amount of data in this buffer |
| 97 | * @lost: if data was lost/truncated |
| 98 | * @head: logical write offset inside the buffer |
| 99 | * @snapshot: if this is for a snapshot/overwrite counter |
| 100 | * @stop_pos: STOP topa entry in the buffer |
| 101 | * @intr_pos: INT topa entry in the buffer |
| 102 | * @data_pages: array of pages from perf |
| 103 | * @topa_index: table of topa entries indexed by page offset |
| 104 | */ |
| 105 | struct pt_buffer { |
| 106 | int cpu; |
| 107 | struct list_head tables; |
| 108 | struct topa *first, *last, *cur; |
| 109 | unsigned int cur_idx; |
| 110 | size_t output_off; |
| 111 | unsigned long nr_pages; |
| 112 | local_t data_size; |
| 113 | local_t lost; |
| 114 | local64_t head; |
| 115 | bool snapshot; |
| 116 | unsigned long stop_pos, intr_pos; |
| 117 | void **data_pages; |
| 118 | struct topa_entry *topa_index[0]; |
| 119 | }; |
| 120 | |
| 121 | /** |
| 122 | * struct pt - per-cpu pt context |
| 123 | * @handle: perf output handle |
| 124 | * @handle_nmi: do handle PT PMI on this cpu, there's an active event |
| 125 | */ |
| 126 | struct pt { |
| 127 | struct perf_output_handle handle; |
| 128 | int handle_nmi; |
| 129 | }; |
| 130 | |
| 131 | #endif /* __INTEL_PT_H__ */ |