1 /* SPDX-License-Identifier: GPL-2.0 */
5 #include <linux/kernel.h>
6 #include <linux/list.h>
9 #ifdef CONFIG_PROC_CPU_RESCTRL
11 int proc_resctrl_show(struct seq_file
*m
,
12 struct pid_namespace
*ns
,
14 struct task_struct
*tsk
);
19 * enum resctrl_conf_type - The type of configuration.
20 * @CDP_NONE: No prioritisation, both code and data are controlled or monitored.
21 * @CDP_CODE: Configuration applies to instruction fetches.
22 * @CDP_DATA: Configuration applies to reads and writes.
24 enum resctrl_conf_type
{
30 #define CDP_NUM_TYPES (CDP_DATA + 1)
33 * struct resctrl_staged_config - parsed configuration to be applied
34 * @new_ctrl: new ctrl value to be loaded
35 * @have_new_ctrl: whether the user provided new_ctrl is valid
37 struct resctrl_staged_config
{
43 * struct rdt_domain - group of CPUs sharing a resctrl resource
44 * @list: all instances of this resource
45 * @id: unique id for this instance
46 * @cpu_mask: which CPUs share this resource
47 * @rmid_busy_llc: bitmap of which limbo RMIDs are above threshold
48 * @mbm_total: saved state for MBM total bandwidth
49 * @mbm_local: saved state for MBM local bandwidth
50 * @mbm_over: worker to periodically read MBM h/w counters
51 * @cqm_limbo: worker to periodically read CQM h/w counters
52 * @mbm_work_cpu: worker CPU for MBM h/w counters
53 * @cqm_work_cpu: worker CPU for CQM h/w counters
54 * @plr: pseudo-locked region (if any) associated with domain
55 * @staged_config: parsed configuration to be applied
58 struct list_head list
;
60 struct cpumask cpu_mask
;
61 unsigned long *rmid_busy_llc
;
62 struct mbm_state
*mbm_total
;
63 struct mbm_state
*mbm_local
;
64 struct delayed_work mbm_over
;
65 struct delayed_work cqm_limbo
;
68 struct pseudo_lock_region
*plr
;
69 struct resctrl_staged_config staged_config
[CDP_NUM_TYPES
];
73 * struct resctrl_cache - Cache allocation related data
74 * @cbm_len: Length of the cache bit mask
75 * @min_cbm_bits: Minimum number of consecutive bits to be set
76 * @shareable_bits: Bitmask of shareable resource with other
78 * @arch_has_sparse_bitmaps: True if a bitmap like f00f is valid.
79 * @arch_has_empty_bitmaps: True if the '0' bitmap is valid.
80 * @arch_has_per_cpu_cfg: True if QOS_CFG register for this cache
81 * level has CPU scope.
83 struct resctrl_cache
{
85 unsigned int min_cbm_bits
;
86 unsigned int shareable_bits
;
87 bool arch_has_sparse_bitmaps
;
88 bool arch_has_empty_bitmaps
;
89 bool arch_has_per_cpu_cfg
;
93 * enum membw_throttle_mode - System's memory bandwidth throttling mode
94 * @THREAD_THROTTLE_UNDEFINED: Not relevant to the system
95 * @THREAD_THROTTLE_MAX: Memory bandwidth is throttled at the core
96 * always using smallest bandwidth percentage
97 * assigned to threads, aka "max throttling"
98 * @THREAD_THROTTLE_PER_THREAD: Memory bandwidth is throttled at the thread
100 enum membw_throttle_mode
{
101 THREAD_THROTTLE_UNDEFINED
= 0,
103 THREAD_THROTTLE_PER_THREAD
,
107 * struct resctrl_membw - Memory bandwidth allocation related data
108 * @min_bw: Minimum memory bandwidth percentage user can request
109 * @bw_gran: Granularity at which the memory bandwidth is allocated
110 * @delay_linear: True if memory B/W delay is in linear scale
111 * @arch_needs_linear: True if we can't configure non-linear resources
112 * @throttle_mode: Bandwidth throttling mode when threads request
113 * different memory bandwidths
114 * @mba_sc: True if MBA software controller(mba_sc) is enabled
115 * @mb_map: Mapping of memory B/W percentage to memory B/W delay
117 struct resctrl_membw
{
121 bool arch_needs_linear
;
122 enum membw_throttle_mode throttle_mode
;
127 struct rdt_parse_data
;
128 struct resctrl_schema
;
131 * struct rdt_resource - attributes of a resctrl resource
132 * @rid: The index of the resource
133 * @alloc_enabled: Is allocation enabled on this machine
134 * @mon_enabled: Is monitoring enabled for this feature
135 * @alloc_capable: Is allocation available on this machine
136 * @mon_capable: Is monitor feature available on this machine
137 * @num_rmid: Number of RMIDs available
138 * @cache_level: Which cache level defines scope of this resource
139 * @cache: Cache allocation related data
140 * @membw: If the component has bandwidth controls, their properties.
141 * @domains: All domains for this resource
142 * @name: Name to use in "schemata" file.
143 * @data_width: Character width of data when displaying
144 * @default_ctrl: Specifies default cache cbm or memory B/W percent.
145 * @format_str: Per resource format string to show domain value
146 * @parse_ctrlval: Per resource function pointer to parse control values
147 * @evt_list: List of monitoring events
148 * @fflags: flags to choose base and info files
149 * @cdp_capable: Is the CDP feature available on this resource
151 struct rdt_resource
{
159 struct resctrl_cache cache
;
160 struct resctrl_membw membw
;
161 struct list_head domains
;
165 const char *format_str
;
166 int (*parse_ctrlval
)(struct rdt_parse_data
*data
,
167 struct resctrl_schema
*s
,
168 struct rdt_domain
*d
);
169 struct list_head evt_list
;
170 unsigned long fflags
;
175 * struct resctrl_schema - configuration abilities of a resource presented to
177 * @list: Member of resctrl_schema_all.
178 * @name: The name to use in the "schemata" file.
179 * @conf_type: Whether this schema is specific to code/data.
180 * @res: The resource structure exported by the architecture to describe
181 * the hardware that is configured by this schema.
182 * @num_closid: The number of closid that can be used with this schema. When
183 * features like CDP are enabled, this will be lower than the
184 * hardware supports for the resource.
186 struct resctrl_schema
{
187 struct list_head list
;
189 enum resctrl_conf_type conf_type
;
190 struct rdt_resource
*res
;
194 /* The number of closid supported by this resource regardless of CDP */
195 u32
resctrl_arch_get_num_closid(struct rdt_resource
*r
);
196 int resctrl_arch_update_domains(struct rdt_resource
*r
, u32 closid
);
197 u32
resctrl_arch_get_config(struct rdt_resource
*r
, struct rdt_domain
*d
,
198 u32 closid
, enum resctrl_conf_type type
);
200 #endif /* _RESCTRL_H */