summaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel/cpu/resctrl/internal.h
blob: f1d926832ec8af07a4c8bb56d66f9d6ce14dd9e6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_RESCTRL_INTERNAL_H
#define _ASM_X86_RESCTRL_INTERNAL_H

#include <linux/resctrl.h>
#include <linux/sched.h>
#include <linux/kernfs.h>
#include <linux/fs_context.h>
#include <linux/jump_label.h>
#include <linux/tick.h>

#include <asm/resctrl.h>

#define L3_QOS_CDP_ENABLE		0x01ULL

#define L2_QOS_CDP_ENABLE		0x01ULL

#define CQM_LIMBOCHECK_INTERVAL	1000

#define MBM_CNTR_WIDTH_BASE		24
#define MBM_OVERFLOW_INTERVAL		1000
#define MAX_MBA_BW			100u
#define MBA_IS_LINEAR			0x4
#define MBM_CNTR_WIDTH_OFFSET_AMD	20

#define RMID_VAL_ERROR			BIT_ULL(63)
#define RMID_VAL_UNAVAIL		BIT_ULL(62)
/*
 * With the above fields in use 62 bits remain in MSR_IA32_QM_CTR for
 * data to be returned. The counter width is discovered from the hardware
 * as an offset from MBM_CNTR_WIDTH_BASE.
 */
#define MBM_CNTR_WIDTH_OFFSET_MAX (62 - MBM_CNTR_WIDTH_BASE)

/* Reads to Local DRAM Memory */
#define READS_TO_LOCAL_MEM		BIT(0)

/* Reads to Remote DRAM Memory */
#define READS_TO_REMOTE_MEM		BIT(1)

/* Non-Temporal Writes to Local Memory */
#define NON_TEMP_WRITE_TO_LOCAL_MEM	BIT(2)

/* Non-Temporal Writes to Remote Memory */
#define NON_TEMP_WRITE_TO_REMOTE_MEM	BIT(3)

/* Reads to Local Memory the system identifies as "Slow Memory" */
#define READS_TO_LOCAL_S_MEM		BIT(4)

/* Reads to Remote Memory the system identifies as "Slow Memory" */
#define READS_TO_REMOTE_S_MEM		BIT(5)

/* Dirty Victims to All Types of Memory */
#define DIRTY_VICTIMS_TO_ALL_MEM	BIT(6)

/* Max event bits supported */
#define MAX_EVT_CONFIG_BITS		GENMASK(6, 0)

/**
 * cpumask_any_housekeeping() - Choose any CPU in @mask, preferring those that
 *			        aren't marked nohz_full
 * @mask:	The mask to pick a CPU from.
 * @exclude_cpu:The CPU to avoid picking.
 *
 * Returns a CPU from @mask, but not @exclude_cpu. If there are housekeeping
 * CPUs that don't use nohz_full, these are preferred. Pass
 * RESCTRL_PICK_ANY_CPU to avoid excluding any CPUs.
 *
 * When a CPU is excluded, returns >= nr_cpu_ids if no CPUs are available.
 */
static inline unsigned int
cpumask_any_housekeeping(const struct cpumask *mask, int exclude_cpu)
{
	unsigned int cpu, hk_cpu;

	if (exclude_cpu == RESCTRL_PICK_ANY_CPU)
		cpu = cpumask_any(mask);
	else
		cpu = cpumask_any_but(mask, exclude_cpu);

	/* Only continue if tick_nohz_full_mask has been initialized. */
	if (!tick_nohz_full_enabled())
		return cpu;

	/* If the CPU picked isn't marked nohz_full nothing more needs doing. */
	if (cpu < nr_cpu_ids && !tick_nohz_full_cpu(cpu))
		return cpu;

	/* Try to find a CPU that isn't nohz_full to use in preference */
	hk_cpu = cpumask_nth_andnot(0, mask, tick_nohz_full_mask);
	if (hk_cpu == exclude_cpu)
		hk_cpu = cpumask_nth_andnot(1, mask, tick_nohz_full_mask);

	if (hk_cpu < nr_cpu_ids)
		cpu = hk_cpu;

	return cpu;
}

struct rdt_fs_context {
	struct kernfs_fs_context	kfc;
	bool				enable_cdpl2;
	bool				enable_cdpl3;
	bool				enable_mba_mbps;
	bool				enable_debug;
};

static inline struct rdt_fs_context *rdt_fc2context(struct fs_context *fc)
{
	struct kernfs_fs_context *kfc = fc->fs_private;

	return container_of(kfc, struct rdt_fs_context, kfc);
}

/**
 * struct mon_evt - Entry in the event list of a resource
 * @evtid:		event id
 * @name:		name of the event
 * @configurable:	true if the event is configurable
 * @list:		entry in &rdt_resource->evt_list
 */
struct mon_evt {
	enum resctrl_event_id	evtid;
	char			*name;
	bool			configurable;
	struct list_head	list;
};

/**
 * union mon_data_bits - Monitoring details for each event file
 * @priv:              Used to store monitoring event data in @u
 *                     as kernfs private data
 * @rid:               Resource id associated with the event file
 * @evtid:             Event id associated with the event file
 * @domid:             The domain to which the event file belongs
 * @u:                 Name of the bit fields struct
 */
union mon_data_bits {
	void *priv;
	struct {
		unsigned int rid		: 10;
		enum resctrl_event_id evtid	: 8;
		unsigned int domid		: 14;
	} u;
};

struct rmid_read {
	struct rdtgroup		*rgrp;
	struct rdt_resource	*r;
	struct rdt_domain	*d;
	enum resctrl_event_id	evtid;
	bool			first;
	int			err;
	u64			val;
	void			*arch_mon_ctx;
};

extern unsigned int rdt_mon_features;
extern struct list_head resctrl_schema_all;
extern bool resctrl_mounted;

enum rdt_group_type {
	RDTCTRL_GROUP = 0,
	RDTMON_GROUP,
	RDT_NUM_GROUP,
};

/**
 * enum rdtgrp_mode - Mode of a RDT resource group
 * @RDT_MODE_SHAREABLE: This resource group allows sharing of its allocations
 * @RDT_MODE_EXCLUSIVE: No sharing of this resource group's allocations allowed
 * @RDT_MODE_PSEUDO_LOCKSETUP: Resource group will be used for Pseudo-Locking
 * @RDT_MODE_PSEUDO_LOCKED: No sharing of this resource group's allocations
 *                          allowed AND the allocations are Cache Pseudo-Locked
 * @RDT_NUM_MODES: Total number of modes
 *
 * The mode of a resource group enables control over the allowed overlap
 * between allocations associated with different resource groups (classes
 * of service). User is able to modify the mode of a resource group by
 * writing to the "mode" resctrl file associated with the resource group.
 *
 * The "shareable", "exclusive", and "pseudo-locksetup" modes are set by
 * writing the appropriate text to the "mode" file. A resource group enters
 * "pseudo-locked" mode after the schemata is written while the resource
 * group is in "pseudo-locksetup" mode.
 */
enum rdtgrp_mode {
	RDT_MODE_SHAREABLE = 0,
	RDT_MODE_EXCLUSIVE,
	RDT_MODE_PSEUDO_LOCKSETUP,
	RDT_MODE_PSEUDO_LOCKED,

	/* Must be last */
	RDT_NUM_MODES,
};

/**
 * struct mongroup - store mon group's data in resctrl fs.
 * @mon_data_kn:		kernfs node for the mon_data directory
 * @parent:			parent rdtgrp
 * @crdtgrp_list:		child rdtgroup node list
 * @rmid:			rmid for this rdtgroup
 */
struct mongroup {
	struct kernfs_node	*mon_data_kn;
	struct rdtgroup		*parent;
	struct list_head	crdtgrp_list;
	u32			rmid;
};

/**
 * struct pseudo_lock_region - pseudo-lock region information
 * @s:			Resctrl schema for the resource to which this
 *			pseudo-locked region belongs
 * @d:			RDT domain to which this pseudo-locked region
 *			belongs
 * @cbm:		bitmask of the pseudo-locked region
 * @lock_thread_wq:	waitqueue used to wait on the pseudo-locking thread
 *			completion
 * @thread_done:	variable used by waitqueue to test if pseudo-locking
 *			thread completed
 * @cpu:		core associated with the cache on which the setup code
 *			will be run
 * @line_size:		size of the cache lines
 * @size:		size of pseudo-locked region in bytes
 * @kmem:		the kernel memory associated with pseudo-locked region
 * @minor:		minor number of character device associated with this
 *			region
 * @debugfs_dir:	pointer to this region's directory in the debugfs
 *			filesystem
 * @pm_reqs:		Power management QoS requests related to this region
 */
struct pseudo_lock_region {
	struct resctrl_schema	*s;
	struct rdt_domain	*d;
	u32			cbm;
	wait_queue_head_t	lock_thread_wq;
	int			thread_done;
	int			cpu;
	unsigned int		line_size;
	unsigned int		size;
	void			*kmem;
	unsigned int		minor;
	struct dentry		*debugfs_dir;
	struct list_head	pm_reqs;
};

/**
 * struct rdtgroup - store rdtgroup's data in resctrl file system.
 * @kn:				kernfs node
 * @rdtgroup_list:		linked list for all rdtgroups
 * @closid:			closid for this rdtgroup
 * @cpu_mask:			CPUs assigned to this rdtgroup
 * @flags:			status bits
 * @waitcount:			how many cpus expect to find this
 *				group when they acquire rdtgroup_mutex
 * @type:			indicates type of this rdtgroup - either
 *				monitor only or ctrl_mon group
 * @mon:			mongroup related data
 * @mode:			mode of resource group
 * @plr:			pseudo-locked region
 */
struct rdtgroup {
	struct kernfs_node		*kn;
	struct list_head		rdtgroup_list;
	u32				closid;
	struct cpumask			cpu_mask;
	int				flags;
	atomic_t			waitcount;
	enum rdt_group_type		type;
	struct mongroup			mon;
	enum rdtgrp_mode		mode;
	struct pseudo_lock_region	*plr;
};

/* rdtgroup.flags */
#define	RDT_DELETED		1

/* rftype.flags */
#define RFTYPE_FLAGS_CPUS_LIST	1

/*
 * Define the file type flags for base and info directories.
 */
#define RFTYPE_INFO			BIT(0)
#define RFTYPE_BASE			BIT(1)
#define RFTYPE_CTRL			BIT(4)
#define RFTYPE_MON			BIT(5)
#define RFTYPE_TOP			BIT(6)
#define RFTYPE_RES_CACHE		BIT(8)
#define RFTYPE_RES_MB			BIT(9)
#define RFTYPE_DEBUG			BIT(10)
#define RFTYPE_CTRL_INFO		(RFTYPE_INFO | RFTYPE_CTRL)
#define RFTYPE_MON_INFO			(RFTYPE_INFO | RFTYPE_MON)
#define RFTYPE_TOP_INFO			(RFTYPE_INFO | RFTYPE_TOP)
#define RFTYPE_CTRL_BASE		(RFTYPE_BASE | RFTYPE_CTRL)
#define RFTYPE_MON_BASE			(RFTYPE_BASE | RFTYPE_MON)

/* List of all resource groups */
extern struct list_head rdt_all_groups;

extern int max_name_width, max_data_width;

int __init rdtgroup_init(void);
void __exit rdtgroup_exit(void);

/**
 * struct rftype - describe each file in the resctrl file system
 * @name:	File name
 * @mode:	Access mode
 * @kf_ops:	File operations
 * @flags:	File specific RFTYPE_FLAGS_* flags
 * @fflags:	File specific RFTYPE_* flags
 * @seq_show:	Show content of the file
 * @write:	Write to the file
 */
struct rftype {
	char			*name;
	umode_t			mode;
	const struct kernfs_ops	*kf_ops;
	unsigned long		flags;
	unsigned long		fflags;

	int (*seq_show)(struct kernfs_open_file *of,
			struct seq_file *sf, void *v);
	/*
	 * write() is the generic write callback which maps directly to
	 * kernfs write operation and overrides all other operations.
	 * Maximum write size is determined by ->max_write_len.
	 */
	ssize_t (*write)(struct kernfs_open_file *of,
			 char *buf, size_t nbytes, loff_t off);
};

/**
 * struct mbm_state - status for each MBM counter in each domain
 * @prev_bw_bytes: Previous bytes value read for bandwidth calculation
 * @prev_bw:	The most recent bandwidth in MBps
 */
struct mbm_state {
	u64	prev_bw_bytes;
	u32	prev_bw;
};

/**
 * struct arch_mbm_state - values used to compute resctrl_arch_rmid_read()s
 *			   return value.
 * @chunks:	Total data moved (multiply by rdt_group.mon_scale to get bytes)
 * @prev_msr:	Value of IA32_QM_CTR last time it was read for the RMID used to
 *		find this struct.
 */
struct arch_mbm_state {
	u64	chunks;
	u64	prev_msr;
};

/**
 * struct rdt_hw_domain - Arch private attributes of a set of CPUs that share
 *			  a resource
 * @d_resctrl:	Properties exposed to the resctrl file system
 * @ctrl_val:	array of cache or mem ctrl values (indexed by CLOSID)
 * @arch_mbm_total:	arch private state for MBM total bandwidth
 * @arch_mbm_local:	arch private state for MBM local bandwidth
 *
 * Members of this structure are accessed via helpers that provide abstraction.
 */
struct rdt_hw_domain {
	struct rdt_domain		d_resctrl;
	u32				*ctrl_val;
	struct arch_mbm_state		*arch_mbm_total;
	struct arch_mbm_state		*arch_mbm_local;
};

static inline struct rdt_hw_domain *resctrl_to_arch_dom(struct rdt_domain *r)
{
	return container_of(r, struct rdt_hw_domain, d_resctrl);
}

/**
 * struct msr_param - set a range of MSRs from a domain
 * @res:       The resource to use
 * @dom:       The domain to update
 * @low:       Beginning index from base MSR
 * @high:      End index
 */
struct msr_param {
	struct rdt_resource	*res;
	struct rdt_domain	*dom;
	u32			low;
	u32			high;
};

static inline bool is_llc_occupancy_enabled(void)
{
	return (rdt_mon_features & (1 << QOS_L3_OCCUP_EVENT_ID));
}

static inline bool is_mbm_total_enabled(void)
{
	return (rdt_mon_features & (1 << QOS_L3_MBM_TOTAL_EVENT_ID));
}

static inline bool is_mbm_local_enabled(void)
{
	return (rdt_mon_features & (1 << QOS_L3_MBM_LOCAL_EVENT_ID));
}

static inline bool is_mbm_enabled(void)
{
	return (is_mbm_total_enabled() || is_mbm_local_enabled());
}

static inline bool is_mbm_event(int e)
{
	return (e >= QOS_L3_MBM_TOTAL_EVENT_ID &&
		e <= QOS_L3_MBM_LOCAL_EVENT_ID);
}

struct rdt_parse_data {
	struct rdtgroup		*rdtgrp;
	char			*buf;
};

/**
 * struct rdt_hw_resource - arch private attributes of a resctrl resource
 * @r_resctrl:		Attributes of the resource used directly by resctrl.
 * @num_closid:		Maximum number of closid this hardware can support,
 *			regardless of CDP. This is exposed via
 *			resctrl_arch_get_num_closid() to avoid confusion
 *			with struct resctrl_schema's property of the same name,
 *			which has been corrected for features like CDP.
 * @msr_base:		Base MSR address for CBMs
 * @msr_update:		Function pointer to update QOS MSRs
 * @mon_scale:		cqm counter * mon_scale = occupancy in bytes
 * @mbm_width:		Monitor width, to detect and correct for overflow.
 * @mbm_cfg_mask:	Bandwidth sources that can be tracked when Bandwidth
 *			Monitoring Event Configuration (BMEC) is supported.
 * @cdp_enabled:	CDP state of this resource
 *
 * Members of this structure are either private to the architecture
 * e.g. mbm_width, or accessed via helpers that provide abstraction. e.g.
 * msr_update and msr_base.
 */
struct rdt_hw_resource {
	struct rdt_resource	r_resctrl;
	u32			num_closid;
	unsigned int		msr_base;
	void			(*msr_update)(struct msr_param *m);
	unsigned int		mon_scale;
	unsigned int		mbm_width;
	unsigned int		mbm_cfg_mask;
	bool			cdp_enabled;
};

static inline struct rdt_hw_resource *resctrl_to_arch_res(struct rdt_resource *r)
{
	return container_of(r, struct rdt_hw_resource, r_resctrl);
}

int parse_cbm(struct rdt_parse_data *data, struct resctrl_schema *s,
	      struct rdt_domain *d);
int parse_bw(struct rdt_parse_data *data, struct resctrl_schema *s,
	     struct rdt_domain *d);

extern struct mutex rdtgroup_mutex;

extern struct rdt_hw_resource rdt_resources_all[];
extern struct rdtgroup rdtgroup_default;
extern struct dentry *debugfs_resctrl;

enum resctrl_res_level {
	RDT_RESOURCE_L3,
	RDT_RESOURCE_L2,
	RDT_RESOURCE_MBA,
	RDT_RESOURCE_SMBA,

	/* Must be the last */
	RDT_NUM_RESOURCES,
};

static inline struct rdt_resource *resctrl_inc(struct rdt_resource *res)
{
	struct rdt_hw_resource *hw_res = resctrl_to_arch_res(res);

	hw_res++;
	return &hw_res->r_resctrl;
}

static inline bool resctrl_arch_get_cdp_enabled(enum resctrl_res_level l)
{
	return rdt_resources_all[l].cdp_enabled;
}

int resctrl_arch_set_cdp_enabled(enum resctrl_res_level l, bool enable);

/*
 * To return the common struct rdt_resource, which is contained in struct
 * rdt_hw_resource, walk the resctrl member of struct rdt_hw_resource.
 */
#define for_each_rdt_resource(r)					      \
	for (r = &rdt_resources_all[0].r_resctrl;			      \
	     r <= &rdt_resources_all[RDT_NUM_RESOURCES - 1].r_resctrl;	      \
	     r = resctrl_inc(r))

#define for_each_capable_rdt_resource(r)				      \
	for_each_rdt_resource(r)					      \
		if (r->alloc_capable || r->mon_capable)

#define for_each_alloc_capable_rdt_resource(r)				      \
	for_each_rdt_resource(r)					      \
		if (r->alloc_capable)

#define for_each_mon_capable_rdt_resource(r)				      \
	for_each_rdt_resource(r)					      \
		if (r->mon_capable)

/* CPUID.(EAX=10H, ECX=ResID=1).EAX */
union cpuid_0x10_1_eax {
	struct {
		unsigned int cbm_len:5;
	} split;
	unsigned int full;
};

/* CPUID.(EAX=10H, ECX=ResID=3).EAX */
union cpuid_0x10_3_eax {
	struct {
		unsigned int max_delay:12;
	} split;
	unsigned int full;
};

/* CPUID.(EAX=10H, ECX=ResID).ECX */
union cpuid_0x10_x_ecx {
	struct {
		unsigned int reserved:3;
		unsigned int noncont:1;
	} split;
	unsigned int full;
};

/* CPUID.(EAX=10H, ECX=ResID).EDX */
union cpuid_0x10_x_edx {
	struct {
		unsigned int cos_max:16;
	} split;
	unsigned int full;
};

void rdt_last_cmd_clear(void);
void rdt_last_cmd_puts(const char *s);
__printf(1, 2)
void rdt_last_cmd_printf(const char *fmt, ...);

void rdt_ctrl_update(void *arg);
struct rdtgroup *rdtgroup_kn_lock_live(struct kernfs_node *kn);
void rdtgroup_kn_unlock(struct kernfs_node *kn);
int rdtgroup_kn_mode_restrict(struct rdtgroup *r, const char *name);
int rdtgroup_kn_mode_restore(struct rdtgroup *r, const char *name,
			     umode_t mask);
struct rdt_domain *rdt_find_domain(struct rdt_resource *r, int id,
				   struct list_head **pos);
ssize_t rdtgroup_schemata_write(struct kernfs_open_file *of,
				char *buf, size_t nbytes, loff_t off);
int rdtgroup_schemata_show(struct kernfs_open_file *of,
			   struct seq_file *s, void *v);
bool rdtgroup_cbm_overlaps(struct resctrl_schema *s, struct rdt_domain *d,
			   unsigned long cbm, int closid, bool exclusive);
unsigned int rdtgroup_cbm_to_size(struct rdt_resource *r, struct rdt_domain *d,
				  unsigned long cbm);
enum rdtgrp_mode rdtgroup_mode_by_closid(int closid);
int rdtgroup_tasks_assigned(struct rdtgroup *r);
int rdtgroup_locksetup_enter(struct rdtgroup *rdtgrp);
int rdtgroup_locksetup_exit(struct rdtgroup *rdtgrp);
bool rdtgroup_cbm_overlaps_pseudo_locked(struct rdt_domain *d, unsigned long cbm);
bool rdtgroup_pseudo_locked_in_hierarchy(struct rdt_domain *d);
int rdt_pseudo_lock_init(void);
void rdt_pseudo_lock_release(void);
int rdtgroup_pseudo_lock_create(struct rdtgroup *rdtgrp);
void rdtgroup_pseudo_lock_remove(struct rdtgroup *rdtgrp);
struct rdt_domain *get_domain_from_cpu(int cpu, struct rdt_resource *r);
int closids_supported(void);
void closid_free(int closid);
int alloc_rmid(u32 closid);
void free_rmid(u32 closid, u32 rmid);
int rdt_get_mon_l3_config(struct rdt_resource *r);
void __exit rdt_put_mon_l3_config(void);
bool __init rdt_cpu_has(int flag);
void mon_event_count(void *info);
int rdtgroup_mondata_show(struct seq_file *m, void *arg);
void mon_event_read(struct rmid_read *rr, struct rdt_resource *r,
		    struct rdt_domain *d, struct rdtgroup *rdtgrp,
		    int evtid, int first);
void mbm_setup_overflow_handler(struct rdt_domain *dom,
				unsigned long delay_ms,
				int exclude_cpu);
void mbm_handle_overflow(struct work_struct *work);
void __init intel_rdt_mbm_apply_quirk(void);
bool is_mba_sc(struct rdt_resource *r);
void cqm_setup_limbo_handler(struct rdt_domain *dom, unsigned long delay_ms,
			     int exclude_cpu);
void cqm_handle_limbo(struct work_struct *work);
bool has_busy_rmid(struct rdt_domain *d);
void __check_limbo(struct rdt_domain *d, bool force_free);
void rdt_domain_reconfigure_cdp(struct rdt_resource *r);
void __init thread_throttle_mode_init(void);
void __init mbm_config_rftype_init(const char *config);
void rdt_staged_configs_clear(void);
bool closid_allocated(unsigned int closid);
int resctrl_find_cleanest_closid(void);

#endif /* _ASM_X86_RESCTRL_INTERNAL_H */