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52ca9ced AS |
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 | ||
709bc871 | 28 | #define TOPA_SHIFT 12 |
52ca9ced | 29 | |
709bc871 | 30 | static inline unsigned int sizes(unsigned int tsz) |
52ca9ced | 31 | { |
709bc871 | 32 | return 1 << (tsz + TOPA_SHIFT); |
52ca9ced AS |
33 | }; |
34 | ||
35 | struct topa_entry { | |
36 | u64 end : 1; | |
37 | u64 rsvd0 : 1; | |
38 | u64 intr : 1; | |
39 | u64 rsvd1 : 1; | |
40 | u64 stop : 1; | |
41 | u64 rsvd2 : 1; | |
42 | u64 size : 4; | |
43 | u64 rsvd3 : 2; | |
44 | u64 base : 36; | |
45 | u64 rsvd4 : 16; | |
46 | }; | |
47 | ||
709bc871 TI |
48 | #define PT_CPUID_LEAVES 2 |
49 | #define PT_CPUID_REGS_NUM 4 /* number of regsters (eax, ebx, ecx, edx) */ | |
52ca9ced AS |
50 | |
51 | enum pt_capabilities { | |
52 | PT_CAP_max_subleaf = 0, | |
53 | PT_CAP_cr3_filtering, | |
b1bf72d6 AS |
54 | PT_CAP_psb_cyc, |
55 | PT_CAP_mtc, | |
52ca9ced AS |
56 | PT_CAP_topa_output, |
57 | PT_CAP_topa_multiple_entries, | |
b1bf72d6 | 58 | PT_CAP_single_range_output, |
52ca9ced | 59 | PT_CAP_payloads_lip, |
b1bf72d6 AS |
60 | PT_CAP_mtc_periods, |
61 | PT_CAP_cycle_thresholds, | |
62 | PT_CAP_psb_periods, | |
52ca9ced AS |
63 | }; |
64 | ||
65 | struct pt_pmu { | |
66 | struct pmu pmu; | |
709bc871 | 67 | u32 caps[PT_CPUID_REGS_NUM * PT_CPUID_LEAVES]; |
1c5ac21a | 68 | bool vmx; |
52ca9ced AS |
69 | }; |
70 | ||
71 | /** | |
72 | * struct pt_buffer - buffer configuration; one buffer per task_struct or | |
73 | * cpu, depending on perf event configuration | |
74 | * @cpu: cpu for per-cpu allocation | |
75 | * @tables: list of ToPA tables in this buffer | |
76 | * @first: shorthand for first topa table | |
77 | * @last: shorthand for last topa table | |
78 | * @cur: current topa table | |
79 | * @nr_pages: buffer size in pages | |
80 | * @cur_idx: current output region's index within @cur table | |
81 | * @output_off: offset within the current output region | |
82 | * @data_size: running total of the amount of data in this buffer | |
83 | * @lost: if data was lost/truncated | |
84 | * @head: logical write offset inside the buffer | |
85 | * @snapshot: if this is for a snapshot/overwrite counter | |
86 | * @stop_pos: STOP topa entry in the buffer | |
87 | * @intr_pos: INT topa entry in the buffer | |
88 | * @data_pages: array of pages from perf | |
89 | * @topa_index: table of topa entries indexed by page offset | |
90 | */ | |
91 | struct pt_buffer { | |
92 | int cpu; | |
93 | struct list_head tables; | |
94 | struct topa *first, *last, *cur; | |
95 | unsigned int cur_idx; | |
96 | size_t output_off; | |
97 | unsigned long nr_pages; | |
98 | local_t data_size; | |
99 | local_t lost; | |
100 | local64_t head; | |
101 | bool snapshot; | |
102 | unsigned long stop_pos, intr_pos; | |
103 | void **data_pages; | |
104 | struct topa_entry *topa_index[0]; | |
105 | }; | |
106 | ||
107 | /** | |
108 | * struct pt - per-cpu pt context | |
109 | * @handle: perf output handle | |
110 | * @handle_nmi: do handle PT PMI on this cpu, there's an active event | |
1c5ac21a | 111 | * @vmx_on: 1 if VMX is ON on this cpu |
52ca9ced AS |
112 | */ |
113 | struct pt { | |
114 | struct perf_output_handle handle; | |
115 | int handle_nmi; | |
1c5ac21a | 116 | int vmx_on; |
52ca9ced AS |
117 | }; |
118 | ||
119 | #endif /* __INTEL_PT_H__ */ |