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

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