LXR linux/arch/powerpc/perf/hv-24x7.h

   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
   7enum 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
  16struct 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
  59struct 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
  68struct 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 */
  88struct 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
 108struct 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
 144struct 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