1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef LINUX_POWERPC_PERF_HV_24X7_H_ |
3 | #define LINUX_POWERPC_PERF_HV_24X7_H_ |
4 | |
5 | #include <linux/types.h> |
6 | |
7 | enum hv_perf_domains { |
8 | #define DOMAIN(n, v, x, c) HV_PERF_DOMAIN_##n = v, |
9 | #include "hv-24x7-domains.h" |
10 | #undef DOMAIN |
11 | HV_PERF_DOMAIN_MAX, |
12 | }; |
13 | |
14 | #define H24x7_REQUEST_SIZE(iface_version) (iface_version == 1 ? 16 : 32) |
15 | |
16 | struct hv_24x7_request { |
17 | /* PHYSICAL domains require enabling via phyp/hmc. */ |
18 | __u8 performance_domain; |
19 | __u8 reserved[0x1]; |
20 | |
21 | /* bytes to read starting at @data_offset. must be a multiple of 8 */ |
22 | __be16 data_size; |
23 | |
24 | /* |
25 | * byte offset within the perf domain to read from. must be 8 byte |
26 | * aligned |
27 | */ |
28 | __be32 data_offset; |
29 | |
30 | /* |
31 | * only valid for VIRTUAL_PROCESSOR domains, ignored for others. |
32 | * -1 means "current partition only" |
33 | * Enabling via phyp/hmc required for non-"-1" values. 0 forbidden |
34 | * unless requestor is 0. |
35 | */ |
36 | __be16 starting_lpar_ix; |
37 | |
38 | /* |
39 | * Ignored when @starting_lpar_ix == -1 |
40 | * Ignored when @performance_domain is not VIRTUAL_PROCESSOR_* |
41 | * -1 means "infinite" or all |
42 | */ |
43 | __be16 max_num_lpars; |
44 | |
45 | /* chip, core, or virtual processor based on @performance_domain */ |
46 | __be16 starting_ix; |
47 | __be16 max_ix; |
48 | |
49 | /* The following fields were added in v2 of the 24x7 interface. */ |
50 | |
51 | __u8 starting_thread_group_ix; |
52 | |
53 | /* -1 means all thread groups starting at @starting_thread_group_ix */ |
54 | __u8 max_num_thread_groups; |
55 | |
56 | __u8 reserved2[0xE]; |
57 | } __packed; |
58 | |
59 | struct hv_24x7_request_buffer { |
60 | /* 0 - ? */ |
61 | /* 1 - ? */ |
62 | __u8 interface_version; |
63 | __u8 num_requests; |
64 | __u8 reserved[0xE]; |
65 | struct hv_24x7_request requests[]; |
66 | } __packed; |
67 | |
68 | struct hv_24x7_result_element_v1 { |
69 | __be16 lpar_ix; |
70 | |
71 | /* |
72 | * represents the core, chip, or virtual processor based on the |
73 | * request's @performance_domain |
74 | */ |
75 | __be16 domain_ix; |
76 | |
77 | /* -1 if @performance_domain does not refer to a virtual processor */ |
78 | __be32 lpar_cfg_instance_id; |
79 | |
80 | /* size = @result_element_data_size of containing result. */ |
81 | __u64 element_data[]; |
82 | } __packed; |
83 | |
84 | /* |
85 | * We need a separate struct for v2 because the offset of @element_data changed |
86 | * between versions. |
87 | */ |
88 | struct hv_24x7_result_element_v2 { |
89 | __be16 lpar_ix; |
90 | |
91 | /* |
92 | * represents the core, chip, or virtual processor based on the |
93 | * request's @performance_domain |
94 | */ |
95 | __be16 domain_ix; |
96 | |
97 | /* -1 if @performance_domain does not refer to a virtual processor */ |
98 | __be32 lpar_cfg_instance_id; |
99 | |
100 | __u8 thread_group_ix; |
101 | |
102 | __u8 reserved[7]; |
103 | |
104 | /* size = @result_element_data_size of containing result. */ |
105 | __u64 element_data[]; |
106 | } __packed; |
107 | |
108 | struct hv_24x7_result { |
109 | /* |
110 | * The index of the 24x7 Request Structure in the 24x7 Request Buffer |
111 | * used to request this result. |
112 | */ |
113 | __u8 result_ix; |
114 | |
115 | /* |
116 | * 0 = not all result elements fit into the buffer, additional requests |
117 | * required |
118 | * 1 = all result elements were returned |
119 | */ |
120 | __u8 results_complete; |
121 | __be16 num_elements_returned; |
122 | |
123 | /* |
124 | * This is a copy of @data_size from the corresponding hv_24x7_request |
125 | * |
126 | * Warning: to obtain the size of each element in @elements you have |
127 | * to add the size of the other members of the result_element struct. |
128 | */ |
129 | __be16 result_element_data_size; |
130 | __u8 reserved[0x2]; |
131 | |
132 | /* |
133 | * Either |
134 | * struct hv_24x7_result_element_v1[@num_elements_returned] |
135 | * or |
136 | * struct hv_24x7_result_element_v2[@num_elements_returned] |
137 | * |
138 | * depending on the interface_version field of the |
139 | * struct hv_24x7_data_result_buffer containing this result. |
140 | */ |
141 | char elements[]; |
142 | } __packed; |
143 | |
144 | struct hv_24x7_data_result_buffer { |
145 | /* See versioning for request buffer */ |
146 | __u8 interface_version; |
147 | |
148 | __u8 num_results; |
149 | __u8 reserved[0x1]; |
150 | __u8 failing_request_ix; |
151 | __be32 detailed_rc; |
152 | __be64 cec_cfg_instance_id; |
153 | __be64 catalog_version_num; |
154 | __u8 reserved2[0x8]; |
155 | /* WARNING: only valid for the first result due to variable sizes of |
156 | * results */ |
157 | struct hv_24x7_result results[]; /* [@num_results] */ |
158 | } __packed; |
159 | |
160 | #endif |
161 | |