1
2#ifndef _ASM_X86_RESCTRL_INTERNAL_H
3#define _ASM_X86_RESCTRL_INTERNAL_H
4
5#include <linux/resctrl.h>
6#include <linux/sched.h>
7#include <linux/kernfs.h>
8#include <linux/fs_context.h>
9#include <linux/jump_label.h>
10
11#define MSR_IA32_L3_QOS_CFG 0xc81
12#define MSR_IA32_L2_QOS_CFG 0xc82
13#define MSR_IA32_L3_CBM_BASE 0xc90
14#define MSR_IA32_L2_CBM_BASE 0xd10
15#define MSR_IA32_MBA_THRTL_BASE 0xd50
16#define MSR_IA32_MBA_BW_BASE 0xc0000200
17
18#define MSR_IA32_QM_CTR 0x0c8e
19#define MSR_IA32_QM_EVTSEL 0x0c8d
20
21#define L3_QOS_CDP_ENABLE 0x01ULL
22
23#define L2_QOS_CDP_ENABLE 0x01ULL
24
25
26
27
28
29#define QOS_L3_OCCUP_EVENT_ID 0x01
30#define QOS_L3_MBM_TOTAL_EVENT_ID 0x02
31#define QOS_L3_MBM_LOCAL_EVENT_ID 0x03
32
33#define CQM_LIMBOCHECK_INTERVAL 1000
34
35#define MBM_CNTR_WIDTH_BASE 24
36#define MBM_OVERFLOW_INTERVAL 1000
37#define MAX_MBA_BW 100u
38#define MBA_IS_LINEAR 0x4
39#define MBA_MAX_MBPS U32_MAX
40#define MAX_MBA_BW_AMD 0x800
41#define MBM_CNTR_WIDTH_OFFSET_AMD 20
42
43#define RMID_VAL_ERROR BIT_ULL(63)
44#define RMID_VAL_UNAVAIL BIT_ULL(62)
45
46
47
48
49
50#define MBM_CNTR_WIDTH_OFFSET_MAX (62 - MBM_CNTR_WIDTH_BASE)
51
52
53struct rdt_fs_context {
54 struct kernfs_fs_context kfc;
55 bool enable_cdpl2;
56 bool enable_cdpl3;
57 bool enable_mba_mbps;
58};
59
60static inline struct rdt_fs_context *rdt_fc2context(struct fs_context *fc)
61{
62 struct kernfs_fs_context *kfc = fc->fs_private;
63
64 return container_of(kfc, struct rdt_fs_context, kfc);
65}
66
67DECLARE_STATIC_KEY_FALSE(rdt_enable_key);
68DECLARE_STATIC_KEY_FALSE(rdt_mon_enable_key);
69
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75
76struct mon_evt {
77 u32 evtid;
78 char *name;
79 struct list_head list;
80};
81
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90
91union mon_data_bits {
92 void *priv;
93 struct {
94 unsigned int rid : 10;
95 unsigned int evtid : 8;
96 unsigned int domid : 14;
97 } u;
98};
99
100struct rmid_read {
101 struct rdtgroup *rgrp;
102 struct rdt_resource *r;
103 struct rdt_domain *d;
104 int evtid;
105 bool first;
106 u64 val;
107};
108
109extern unsigned int resctrl_cqm_threshold;
110extern bool rdt_alloc_capable;
111extern bool rdt_mon_capable;
112extern unsigned int rdt_mon_features;
113extern struct list_head resctrl_schema_all;
114
115enum rdt_group_type {
116 RDTCTRL_GROUP = 0,
117 RDTMON_GROUP,
118 RDT_NUM_GROUP,
119};
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139
140enum rdtgrp_mode {
141 RDT_MODE_SHAREABLE = 0,
142 RDT_MODE_EXCLUSIVE,
143 RDT_MODE_PSEUDO_LOCKSETUP,
144 RDT_MODE_PSEUDO_LOCKED,
145
146
147 RDT_NUM_MODES,
148};
149
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156
157struct mongroup {
158 struct kernfs_node *mon_data_kn;
159 struct rdtgroup *parent;
160 struct list_head crdtgrp_list;
161 u32 rmid;
162};
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185
186struct pseudo_lock_region {
187 struct resctrl_schema *s;
188 struct rdt_domain *d;
189 u32 cbm;
190 wait_queue_head_t lock_thread_wq;
191 int thread_done;
192 int cpu;
193 unsigned int line_size;
194 unsigned int size;
195 void *kmem;
196 unsigned int minor;
197 struct dentry *debugfs_dir;
198 struct list_head pm_reqs;
199};
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215
216struct rdtgroup {
217 struct kernfs_node *kn;
218 struct list_head rdtgroup_list;
219 u32 closid;
220 struct cpumask cpu_mask;
221 int flags;
222 atomic_t waitcount;
223 enum rdt_group_type type;
224 struct mongroup mon;
225 enum rdtgrp_mode mode;
226 struct pseudo_lock_region *plr;
227};
228
229
230#define RDT_DELETED 1
231
232
233#define RFTYPE_FLAGS_CPUS_LIST 1
234
235
236
237
238#define RFTYPE_INFO BIT(0)
239#define RFTYPE_BASE BIT(1)
240#define RF_CTRLSHIFT 4
241#define RF_MONSHIFT 5
242#define RF_TOPSHIFT 6
243#define RFTYPE_CTRL BIT(RF_CTRLSHIFT)
244#define RFTYPE_MON BIT(RF_MONSHIFT)
245#define RFTYPE_TOP BIT(RF_TOPSHIFT)
246#define RFTYPE_RES_CACHE BIT(8)
247#define RFTYPE_RES_MB BIT(9)
248#define RF_CTRL_INFO (RFTYPE_INFO | RFTYPE_CTRL)
249#define RF_MON_INFO (RFTYPE_INFO | RFTYPE_MON)
250#define RF_TOP_INFO (RFTYPE_INFO | RFTYPE_TOP)
251#define RF_CTRL_BASE (RFTYPE_BASE | RFTYPE_CTRL)
252
253
254extern struct list_head rdt_all_groups;
255
256extern int max_name_width, max_data_width;
257
258int __init rdtgroup_init(void);
259void __exit rdtgroup_exit(void);
260
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270
271struct rftype {
272 char *name;
273 umode_t mode;
274 const struct kernfs_ops *kf_ops;
275 unsigned long flags;
276 unsigned long fflags;
277
278 int (*seq_show)(struct kernfs_open_file *of,
279 struct seq_file *sf, void *v);
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285 ssize_t (*write)(struct kernfs_open_file *of,
286 char *buf, size_t nbytes, loff_t off);
287};
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298struct mbm_state {
299 u64 chunks;
300 u64 prev_msr;
301 u64 prev_bw_msr;
302 u32 prev_bw;
303 u32 delta_bw;
304 bool delta_comp;
305};
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315
316struct rdt_hw_domain {
317 struct rdt_domain d_resctrl;
318 u32 *ctrl_val;
319 u32 *mbps_val;
320};
321
322static inline struct rdt_hw_domain *resctrl_to_arch_dom(struct rdt_domain *r)
323{
324 return container_of(r, struct rdt_hw_domain, d_resctrl);
325}
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332
333struct msr_param {
334 struct rdt_resource *res;
335 u32 low;
336 u32 high;
337};
338
339static inline bool is_llc_occupancy_enabled(void)
340{
341 return (rdt_mon_features & (1 << QOS_L3_OCCUP_EVENT_ID));
342}
343
344static inline bool is_mbm_total_enabled(void)
345{
346 return (rdt_mon_features & (1 << QOS_L3_MBM_TOTAL_EVENT_ID));
347}
348
349static inline bool is_mbm_local_enabled(void)
350{
351 return (rdt_mon_features & (1 << QOS_L3_MBM_LOCAL_EVENT_ID));
352}
353
354static inline bool is_mbm_enabled(void)
355{
356 return (is_mbm_total_enabled() || is_mbm_local_enabled());
357}
358
359static inline bool is_mbm_event(int e)
360{
361 return (e >= QOS_L3_MBM_TOTAL_EVENT_ID &&
362 e <= QOS_L3_MBM_LOCAL_EVENT_ID);
363}
364
365struct rdt_parse_data {
366 struct rdtgroup *rdtgrp;
367 char *buf;
368};
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388struct rdt_hw_resource {
389 struct rdt_resource r_resctrl;
390 u32 num_closid;
391 unsigned int msr_base;
392 void (*msr_update) (struct rdt_domain *d, struct msr_param *m,
393 struct rdt_resource *r);
394 unsigned int mon_scale;
395 unsigned int mbm_width;
396 bool cdp_enabled;
397};
398
399static inline struct rdt_hw_resource *resctrl_to_arch_res(struct rdt_resource *r)
400{
401 return container_of(r, struct rdt_hw_resource, r_resctrl);
402}
403
404int parse_cbm(struct rdt_parse_data *data, struct resctrl_schema *s,
405 struct rdt_domain *d);
406int parse_bw(struct rdt_parse_data *data, struct resctrl_schema *s,
407 struct rdt_domain *d);
408
409extern struct mutex rdtgroup_mutex;
410
411extern struct rdt_hw_resource rdt_resources_all[];
412extern struct rdtgroup rdtgroup_default;
413DECLARE_STATIC_KEY_FALSE(rdt_alloc_enable_key);
414
415extern struct dentry *debugfs_resctrl;
416
417enum resctrl_res_level {
418 RDT_RESOURCE_L3,
419 RDT_RESOURCE_L2,
420 RDT_RESOURCE_MBA,
421
422
423 RDT_NUM_RESOURCES,
424};
425
426static inline struct rdt_resource *resctrl_inc(struct rdt_resource *res)
427{
428 struct rdt_hw_resource *hw_res = resctrl_to_arch_res(res);
429
430 hw_res++;
431 return &hw_res->r_resctrl;
432}
433
434static inline bool resctrl_arch_get_cdp_enabled(enum resctrl_res_level l)
435{
436 return rdt_resources_all[l].cdp_enabled;
437}
438
439int resctrl_arch_set_cdp_enabled(enum resctrl_res_level l, bool enable);
440
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443
444
445#define for_each_rdt_resource(r) \
446 for (r = &rdt_resources_all[0].r_resctrl; \
447 r <= &rdt_resources_all[RDT_NUM_RESOURCES - 1].r_resctrl; \
448 r = resctrl_inc(r))
449
450#define for_each_capable_rdt_resource(r) \
451 for_each_rdt_resource(r) \
452 if (r->alloc_capable || r->mon_capable)
453
454#define for_each_alloc_capable_rdt_resource(r) \
455 for_each_rdt_resource(r) \
456 if (r->alloc_capable)
457
458#define for_each_mon_capable_rdt_resource(r) \
459 for_each_rdt_resource(r) \
460 if (r->mon_capable)
461
462#define for_each_alloc_enabled_rdt_resource(r) \
463 for_each_rdt_resource(r) \
464 if (r->alloc_enabled)
465
466#define for_each_mon_enabled_rdt_resource(r) \
467 for_each_rdt_resource(r) \
468 if (r->mon_enabled)
469
470
471union cpuid_0x10_1_eax {
472 struct {
473 unsigned int cbm_len:5;
474 } split;
475 unsigned int full;
476};
477
478
479union cpuid_0x10_3_eax {
480 struct {
481 unsigned int max_delay:12;
482 } split;
483 unsigned int full;
484};
485
486
487union cpuid_0x10_x_edx {
488 struct {
489 unsigned int cos_max:16;
490 } split;
491 unsigned int full;
492};
493
494void rdt_last_cmd_clear(void);
495void rdt_last_cmd_puts(const char *s);
496__printf(1, 2)
497void rdt_last_cmd_printf(const char *fmt, ...);
498
499void rdt_ctrl_update(void *arg);
500struct rdtgroup *rdtgroup_kn_lock_live(struct kernfs_node *kn);
501void rdtgroup_kn_unlock(struct kernfs_node *kn);
502int rdtgroup_kn_mode_restrict(struct rdtgroup *r, const char *name);
503int rdtgroup_kn_mode_restore(struct rdtgroup *r, const char *name,
504 umode_t mask);
505struct rdt_domain *rdt_find_domain(struct rdt_resource *r, int id,
506 struct list_head **pos);
507ssize_t rdtgroup_schemata_write(struct kernfs_open_file *of,
508 char *buf, size_t nbytes, loff_t off);
509int rdtgroup_schemata_show(struct kernfs_open_file *of,
510 struct seq_file *s, void *v);
511bool rdtgroup_cbm_overlaps(struct resctrl_schema *s, struct rdt_domain *d,
512 unsigned long cbm, int closid, bool exclusive);
513unsigned int rdtgroup_cbm_to_size(struct rdt_resource *r, struct rdt_domain *d,
514 unsigned long cbm);
515enum rdtgrp_mode rdtgroup_mode_by_closid(int closid);
516int rdtgroup_tasks_assigned(struct rdtgroup *r);
517int rdtgroup_locksetup_enter(struct rdtgroup *rdtgrp);
518int rdtgroup_locksetup_exit(struct rdtgroup *rdtgrp);
519bool rdtgroup_cbm_overlaps_pseudo_locked(struct rdt_domain *d, unsigned long cbm);
520bool rdtgroup_pseudo_locked_in_hierarchy(struct rdt_domain *d);
521int rdt_pseudo_lock_init(void);
522void rdt_pseudo_lock_release(void);
523int rdtgroup_pseudo_lock_create(struct rdtgroup *rdtgrp);
524void rdtgroup_pseudo_lock_remove(struct rdtgroup *rdtgrp);
525struct rdt_domain *get_domain_from_cpu(int cpu, struct rdt_resource *r);
526int closids_supported(void);
527void closid_free(int closid);
528int alloc_rmid(void);
529void free_rmid(u32 rmid);
530int rdt_get_mon_l3_config(struct rdt_resource *r);
531void mon_event_count(void *info);
532int rdtgroup_mondata_show(struct seq_file *m, void *arg);
533void rmdir_mondata_subdir_allrdtgrp(struct rdt_resource *r,
534 unsigned int dom_id);
535void mkdir_mondata_subdir_allrdtgrp(struct rdt_resource *r,
536 struct rdt_domain *d);
537void mon_event_read(struct rmid_read *rr, struct rdt_resource *r,
538 struct rdt_domain *d, struct rdtgroup *rdtgrp,
539 int evtid, int first);
540void mbm_setup_overflow_handler(struct rdt_domain *dom,
541 unsigned long delay_ms);
542void mbm_handle_overflow(struct work_struct *work);
543void __init intel_rdt_mbm_apply_quirk(void);
544bool is_mba_sc(struct rdt_resource *r);
545void setup_default_ctrlval(struct rdt_resource *r, u32 *dc, u32 *dm);
546u32 delay_bw_map(unsigned long bw, struct rdt_resource *r);
547void cqm_setup_limbo_handler(struct rdt_domain *dom, unsigned long delay_ms);
548void cqm_handle_limbo(struct work_struct *work);
549bool has_busy_rmid(struct rdt_resource *r, struct rdt_domain *d);
550void __check_limbo(struct rdt_domain *d, bool force_free);
551void rdt_domain_reconfigure_cdp(struct rdt_resource *r);
552void __init thread_throttle_mode_init(void);
553
554#endif
555