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Linux/arch/powerpc/perf/hv-24x7.h

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  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 

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