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,
 44enum 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)	\
 59struct 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)			\
 77r_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
 85static 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)	\
114PMU_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/* Generate event list for platforms with counter_info_version 0x6 or below */
143static __maybe_unused struct attribute *hv_gpci_event_attrs_v6[] = {
144#include REQUEST_FILE
145	NULL
146};
147
148/*
149 * Based on getPerfCountInfo v1.018 documentation, some of the hv-gpci
150 * events were deprecated for platform firmware that supports
151 * counter_info_version 0x8 or above.
152 * Those deprecated events are still part of platform firmware that
153 * support counter_info_version 0x6 and below. As per the getPerfCountInfo
154 * v1.018 documentation there is no counter_info_version 0x7.
155 * Undefining macro ENABLE_EVENTS_COUNTERINFO_V6, to disable the addition of
156 * deprecated events in "hv_gpci_event_attrs" attribute group, for platforms
157 * that supports counter_info_version 0x8 or above.
158 */
159#undef ENABLE_EVENTS_COUNTERINFO_V6
160
161/* Generate event list for platforms with counter_info_version 0x8 or above*/
162static __maybe_unused struct attribute *hv_gpci_event_attrs[] = {
163#include REQUEST_FILE
164	NULL
165};
166
167/* cleanup */
168#include "_clear.h"
169#undef EVENT_ATTR_NAME
170#undef EVENT_ATTR_NAME_
171#undef BIT_NAME
172#undef BIT_NAME_
173#undef STRUCT_NAME
174#undef REQUEST_VALUE
175#undef REQUEST_VALUE_
176
177#endif