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 struct hv_24x7_request {
  14         /* PHYSICAL domains require enabling via phyp/hmc. */
  15         __u8 performance_domain;
  16         __u8 reserved[0x1];
  17
  18         /* bytes to read starting at @data_offset. must be a multiple of 8 */
  19         __be16 data_size;
  20
  21         /*
  22          * byte offset within the perf domain to read from. must be 8 byte
  23          * aligned
  24          */
  25         __be32 data_offset;
  26
  27         /*
  28          * only valid for VIRTUAL_PROCESSOR domains, ignored for others.
  29          * -1 means "current partition only"
  30          *  Enabling via phyp/hmc required for non-"-1" values. 0 forbidden
  31          *  unless requestor is 0.
  32          */
  33         __be16 starting_lpar_ix;
  34
  35         /*
  36          * Ignored when @starting_lpar_ix == -1
  37          * Ignored when @performance_domain is not VIRTUAL_PROCESSOR_*
  38          * -1 means "infinite" or all
  39          */
  40         __be16 max_num_lpars;
  41
  42         /* chip, core, or virtual processor based on @performance_domain */
  43         __be16 starting_ix;
  44         __be16 max_ix;
  45 } __packed;
  46
  47 struct hv_24x7_request_buffer {
  48         /* 0 - ? */
  49         /* 1 - ? */
  50 #define HV_24X7_IF_VERSION_CURRENT 0x01
  51         __u8 interface_version;
  52         __u8 num_requests;
  53         __u8 reserved[0xE];
  54         struct hv_24x7_request requests[1];
  55 } __packed;
  56
  57 struct hv_24x7_result_element {
  58         __be16 lpar_ix;
  59
  60         /*
  61          * represents the core, chip, or virtual processor based on the
  62          * request's @performance_domain
  63          */
  64         __be16 domain_ix;
  65
  66         /* -1 if @performance_domain does not refer to a virtual processor */
  67         __be32 lpar_cfg_instance_id;
  68
  69         /* size = @result_element_data_size of containing result. */
  70         __u64 element_data[1];
  71 } __packed;
  72
  73 struct hv_24x7_result {
  74         __u8 result_ix;
  75
  76         /*
  77          * 0 = not all result elements fit into the buffer, additional requests
  78          *     required
  79          * 1 = all result elements were returned
  80          */
  81         __u8 results_complete;
  82         __be16 num_elements_returned;
  83
  84         /* This is a copy of @data_size from the corresponding hv_24x7_request */
  85         __be16 result_element_data_size;
  86         __u8 reserved[0x2];
  87
  88         /* WARNING: only valid for first result element due to variable sizes
  89          *          of result elements */
  90         /* struct hv_24x7_result_element[@num_elements_returned] */
  91         struct hv_24x7_result_element elements[1];
  92 } __packed;
  93
  94 struct hv_24x7_data_result_buffer {
  95         /* See versioning for request buffer */
  96         __u8 interface_version;
  97
  98         __u8 num_results;
  99         __u8 reserved[0x1];
 100         __u8 failing_request_ix;
 101         __be32 detailed_rc;
 102         __be64 cec_cfg_instance_id;
 103         __be64 catalog_version_num;
 104         __u8 reserved2[0x8];
 105         /* WARNING: only valid for the first result due to variable sizes of
 106          *          results */
 107         struct hv_24x7_result results[1]; /* [@num_results] */
 108 } __packed;
 109
 110 #endif