arch/powerpc/perf/req-gen/perf.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef LINUX_POWERPC_PERF_REQ_GEN_PERF_H_
   3 #define LINUX_POWERPC_PERF_REQ_GEN_PERF_H_
   4
   5 #include <linux/perf_event.h>
   6 #include <linux/stringify.h>
   7
   8 #ifndef REQUEST_FILE
   9 #error "REQUEST_FILE must be defined before including"
  10 #endif
  11
  12 #ifndef NAME_LOWER
  13 #error "NAME_LOWER must be defined before including"
  14 #endif
  15
  16 #ifndef NAME_UPPER
  17 #error "NAME_UPPER must be defined before including"
  18 #endif
  19
  20 #define BE_TYPE_b1 __u8
  21 #define BE_TYPE_b2 __be16
  22 #define BE_TYPE_b4 __be32
  23 #define BE_TYPE_b8 __be64
  24
  25 #define BYTES_TO_BE_TYPE(bytes) \
  26                 BE_TYPE_b##bytes
  27
  28 #define CAT2_(a, b) a ## b
  29 #define CAT2(a, b) CAT2_(a, b)
  30 #define CAT3_(a, b, c) a ## b ## c
  31 #define CAT3(a, b, c) CAT3_(a, b, c)
  32
  33 /*
  34  * enumerate the request values as
  35  * <NAME_UPPER>_<request name> = <request value>
  36  */
  37 #define REQUEST_VALUE__(name_upper, r_name) name_upper ## _ ## r_name
  38 #define REQUEST_VALUE_(name_upper, r_name) REQUEST_VALUE__(name_upper, r_name)
  39 #define REQUEST_VALUE(r_name) REQUEST_VALUE_(NAME_UPPER, r_name)
  40
  41 #include "_clear.h"
  42 #define REQUEST_(r_name, r_value, r_idx_1, r_fields) \
  43         REQUEST_VALUE(r_name) = r_value,
  44 enum CAT2(NAME_LOWER, _requests) {
  45 #include REQUEST_FILE
  46 };
  47
  48 /*
  49  * For each request:
  50  * struct <NAME_LOWER>_<request name> {
  51  *      r_fields
  52  * };
  53  */
  54 #include "_clear.h"
  55 #define STRUCT_NAME__(name_lower, r_name) name_lower ## _ ## r_name
  56 #define STRUCT_NAME_(name_lower, r_name) STRUCT_NAME__(name_lower, r_name)
  57 #define STRUCT_NAME(r_name) STRUCT_NAME_(NAME_LOWER, r_name)
  58 #define REQUEST_(r_name, r_value, r_idx_1, r_fields)    \
  59 struct STRUCT_NAME(r_name) {                            \
  60         r_fields                                        \
  61 };
  62 #define __field_(r_name, r_value, r_idx_1, f_offset, f_bytes, f_name) \
  63         BYTES_TO_BE_TYPE(f_bytes) f_name;
  64 #define __count_(r_name, r_value, r_idx_1, f_offset, f_bytes, f_name) \
  65         __field_(r_name, r_value, r_idx_1, f_offset, f_bytes, f_name)
  66 #define __array_(r_name, r_value, r_idx_1, a_offset, a_bytes, a_name) \
  67         __u8 a_name[a_bytes];
  68
  69 #include REQUEST_FILE
  70
  71 /*
  72  * Generate a check of the field offsets
  73  * <NAME_LOWER>_assert_offsets_correct()
  74  */
  75 #include "_clear.h"
  76 #define REQUEST_(r_name, r_value, index, r_fields)                      \
  77 r_fields
  78 #define __field_(r_name, r_value, r_idx_1, f_offset, f_size, f_name) \
  79         BUILD_BUG_ON(offsetof(struct STRUCT_NAME(r_name), f_name) != f_offset);
  80 #define __count_(r_name, r_value, r_idx_1, c_offset, c_size, c_name) \
  81         __field_(r_name, r_value, r_idx_1, c_offset, c_size, c_name)
  82 #define __array_(r_name, r_value, r_idx_1, a_offset, a_size, a_name) \
  83         __field_(r_name, r_value, r_idx_1, a_offset, a_size, a_name)
  84
  85 static inline void CAT2(NAME_LOWER, _assert_offsets_correct)(void)
  86 {
  87 #include REQUEST_FILE
  88 }
  89
  90 /*
  91  * Generate event attributes:
  92  * PMU_EVENT_ATTR_STRING(<request name>_<field name>,
  93  *      <NAME_LOWER>_event_attr_<request name>_<field name>,
  94  *              "request=<request value>"
  95  *              "starting_index=<starting index type>"
  96  *              "counter_info_version=CURRENT_COUNTER_INFO_VERSION"
  97  *              "length=<f_size>"
  98  *              "offset=<f_offset>")
  99  *
 100  *      TODO: counter_info_version may need to vary, we should interperate the
 101  *      value to some extent
 102  */
 103 #define EVENT_ATTR_NAME__(name, r_name, c_name) \
 104         name ## _event_attr_ ## r_name ## _ ## c_name
 105 #define EVENT_ATTR_NAME_(name, r_name, c_name) \
 106         EVENT_ATTR_NAME__(name, r_name, c_name)
 107 #define EVENT_ATTR_NAME(r_name, c_name) \
 108         EVENT_ATTR_NAME_(NAME_LOWER, r_name, c_name)
 109
 110 #include "_clear.h"
 111 #define __field_(r_name, r_value, r_idx_1, f_offset, f_size, f_name)
 112 #define __array_(r_name, r_value, r_idx_1, a_offset, a_size, a_name)
 113 #define __count_(r_name, r_value, r_idx_1, c_offset, c_size, c_name)    \
 114 PMU_EVENT_ATTR_STRING(                                                  \
 115                 CAT3(r_name, _, c_name),                                \
 116                 EVENT_ATTR_NAME(r_name, c_name),                        \
 117                 "request=" __stringify(r_value) ","                     \
 118                 r_idx_1 ","                                             \
 119                 "counter_info_version="                                 \
 120                         __stringify(COUNTER_INFO_VERSION_CURRENT) ","   \
 121                 "length=" #c_size ","                                   \
 122                 "offset=" #c_offset)
 123 #define REQUEST_(r_name, r_value, r_idx_1, r_fields)                    \
 124         r_fields
 125
 126 #include REQUEST_FILE
 127
 128 /*
 129  * Define event attribute array
 130  * static struct attribute *hv_gpci_event_attrs[] = {
 131  *      &<NAME_LOWER>_event_attr_<request name>_<field name>.attr,
 132  * };
 133  */
 134 #include "_clear.h"
 135 #define __field_(r_name, r_value, r_idx_1, f_offset, f_size, f_name)
 136 #define __count_(r_name, r_value, r_idx_1, c_offset, c_size, c_name)    \
 137         &EVENT_ATTR_NAME(r_name, c_name).attr.attr,
 138 #define __array_(r_name, r_value, r_idx_1, a_offset, a_size, a_name)
 139 #define REQUEST_(r_name, r_value, r_idx_1, r_fields)                    \
 140         r_fields
 141
 142 static __maybe_unused struct attribute *hv_gpci_event_attrs[] = {
 143 #include REQUEST_FILE
 144         NULL
 145 };
 146
 147 /* cleanup */
 148 #include "_clear.h"
 149 #undef EVENT_ATTR_NAME
 150 #undef EVENT_ATTR_NAME_
 151 #undef BIT_NAME
 152 #undef BIT_NAME_
 153 #undef STRUCT_NAME
 154 #undef REQUEST_VALUE
 155 #undef REQUEST_VALUE_
 156
 157 #endif