arch/x86/kernel/cpu/intel_rdt.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_X86_INTEL_RDT_H
   3 #define _ASM_X86_INTEL_RDT_H
   4
   5 #include <linux/sched.h>
   6 #include <linux/kernfs.h>
   7 #include <linux/jump_label.h>
   8
   9 #define IA32_L3_QOS_CFG         0xc81
  10 #define IA32_L2_QOS_CFG         0xc82
  11 #define IA32_L3_CBM_BASE        0xc90
  12 #define IA32_L2_CBM_BASE        0xd10
  13 #define IA32_MBA_THRTL_BASE     0xd50
  14
  15 #define L3_QOS_CDP_ENABLE       0x01ULL
  16
  17 #define L2_QOS_CDP_ENABLE       0x01ULL
  18
  19 /*
  20  * Event IDs are used to program IA32_QM_EVTSEL before reading event
  21  * counter from IA32_QM_CTR
  22  */
  23 #define QOS_L3_OCCUP_EVENT_ID           0x01
  24 #define QOS_L3_MBM_TOTAL_EVENT_ID       0x02
  25 #define QOS_L3_MBM_LOCAL_EVENT_ID       0x03
  26
  27 #define CQM_LIMBOCHECK_INTERVAL 1000
  28
  29 #define MBM_CNTR_WIDTH                  24
  30 #define MBM_OVERFLOW_INTERVAL           1000
  31 #define MAX_MBA_BW                      100u
  32
  33 #define RMID_VAL_ERROR                  BIT_ULL(63)
  34 #define RMID_VAL_UNAVAIL                BIT_ULL(62)
  35
  36 DECLARE_STATIC_KEY_FALSE(rdt_enable_key);
  37
  38 /**
  39  * struct mon_evt - Entry in the event list of a resource
  40  * @evtid:              event id
  41  * @name:               name of the event
  42  */
  43 struct mon_evt {
  44         u32                     evtid;
  45         char                    *name;
  46         struct list_head        list;
  47 };
  48
  49 /**
  50  * struct mon_data_bits - Monitoring details for each event file
  51  * @rid:               Resource id associated with the event file.
  52  * @evtid:             Event id associated with the event file
  53  * @domid:             The domain to which the event file belongs
  54  */
  55 union mon_data_bits {
  56         void *priv;
  57         struct {
  58                 unsigned int rid        : 10;
  59                 unsigned int evtid      : 8;
  60                 unsigned int domid      : 14;
  61         } u;
  62 };
  63
  64 struct rmid_read {
  65         struct rdtgroup         *rgrp;
  66         struct rdt_domain       *d;
  67         int                     evtid;
  68         bool                    first;
  69         u64                     val;
  70 };
  71
  72 extern unsigned int intel_cqm_threshold;
  73 extern bool rdt_alloc_capable;
  74 extern bool rdt_mon_capable;
  75 extern unsigned int rdt_mon_features;
  76
  77 enum rdt_group_type {
  78         RDTCTRL_GROUP = 0,
  79         RDTMON_GROUP,
  80         RDT_NUM_GROUP,
  81 };
  82
  83 /**
  84  * enum rdtgrp_mode - Mode of a RDT resource group
  85  * @RDT_MODE_SHAREABLE: This resource group allows sharing of its allocations
  86  * @RDT_MODE_EXCLUSIVE: No sharing of this resource group's allocations allowed
  87  * @RDT_MODE_PSEUDO_LOCKSETUP: Resource group will be used for Pseudo-Locking
  88  * @RDT_MODE_PSEUDO_LOCKED: No sharing of this resource group's allocations
  89  *                          allowed AND the allocations are Cache Pseudo-Locked
  90  *
  91  * The mode of a resource group enables control over the allowed overlap
  92  * between allocations associated with different resource groups (classes
  93  * of service). User is able to modify the mode of a resource group by
  94  * writing to the "mode" resctrl file associated with the resource group.
  95  *
  96  * The "shareable", "exclusive", and "pseudo-locksetup" modes are set by
  97  * writing the appropriate text to the "mode" file. A resource group enters
  98  * "pseudo-locked" mode after the schemata is written while the resource
  99  * group is in "pseudo-locksetup" mode.
 100  */
 101 enum rdtgrp_mode {
 102         RDT_MODE_SHAREABLE = 0,
 103         RDT_MODE_EXCLUSIVE,
 104         RDT_MODE_PSEUDO_LOCKSETUP,
 105         RDT_MODE_PSEUDO_LOCKED,
 106
 107         /* Must be last */
 108         RDT_NUM_MODES,
 109 };
 110
 111 /**
 112  * struct mongroup - store mon group's data in resctrl fs.
 113  * @mon_data_kn         kernlfs node for the mon_data directory
 114  * @parent:                     parent rdtgrp
 115  * @crdtgrp_list:               child rdtgroup node list
 116  * @rmid:                       rmid for this rdtgroup
 117  */
 118 struct mongroup {
 119         struct kernfs_node      *mon_data_kn;
 120         struct rdtgroup         *parent;
 121         struct list_head        crdtgrp_list;
 122         u32                     rmid;
 123 };
 124
 125 /**
 126  * struct pseudo_lock_region - pseudo-lock region information
 127  * @r:                  RDT resource to which this pseudo-locked region
 128  *                      belongs
 129  * @d:                  RDT domain to which this pseudo-locked region
 130  *                      belongs
 131  * @cbm:                bitmask of the pseudo-locked region
 132  * @lock_thread_wq:     waitqueue used to wait on the pseudo-locking thread
 133  *                      completion
 134  * @thread_done:        variable used by waitqueue to test if pseudo-locking
 135  *                      thread completed
 136  * @cpu:                core associated with the cache on which the setup code
 137  *                      will be run
 138  * @line_size:          size of the cache lines
 139  * @size:               size of pseudo-locked region in bytes
 140  * @kmem:               the kernel memory associated with pseudo-locked region
 141  * @minor:              minor number of character device associated with this
 142  *                      region
 143  * @debugfs_dir:        pointer to this region's directory in the debugfs
 144  *                      filesystem
 145  * @pm_reqs:            Power management QoS requests related to this region
 146  */
 147 struct pseudo_lock_region {
 148         struct rdt_resource     *r;
 149         struct rdt_domain       *d;
 150         u32                     cbm;
 151         wait_queue_head_t       lock_thread_wq;
 152         int                     thread_done;
 153         int                     cpu;
 154         unsigned int            line_size;
 155         unsigned int            size;
 156         void                    *kmem;
 157         unsigned int            minor;
 158         struct dentry           *debugfs_dir;
 159         struct list_head        pm_reqs;
 160 };
 161
 162 /**
 163  * struct rdtgroup - store rdtgroup's data in resctrl file system.
 164  * @kn:                         kernfs node
 165  * @rdtgroup_list:              linked list for all rdtgroups
 166  * @closid:                     closid for this rdtgroup
 167  * @cpu_mask:                   CPUs assigned to this rdtgroup
 168  * @flags:                      status bits
 169  * @waitcount:                  how many cpus expect to find this
 170  *                              group when they acquire rdtgroup_mutex
 171  * @type:                       indicates type of this rdtgroup - either
 172  *                              monitor only or ctrl_mon group
 173  * @mon:                        mongroup related data
 174  * @mode:                       mode of resource group
 175  * @plr:                        pseudo-locked region
 176  */
 177 struct rdtgroup {
 178         struct kernfs_node              *kn;
 179         struct list_head                rdtgroup_list;
 180         u32                             closid;
 181         struct cpumask                  cpu_mask;
 182         int                             flags;
 183         atomic_t                        waitcount;
 184         enum rdt_group_type             type;
 185         struct mongroup                 mon;
 186         enum rdtgrp_mode                mode;
 187         struct pseudo_lock_region       *plr;
 188 };
 189
 190 /* rdtgroup.flags */
 191 #define RDT_DELETED             1
 192
 193 /* rftype.flags */
 194 #define RFTYPE_FLAGS_CPUS_LIST  1
 195
 196 /*
 197  * Define the file type flags for base and info directories.
 198  */
 199 #define RFTYPE_INFO                     BIT(0)
 200 #define RFTYPE_BASE                     BIT(1)
 201 #define RF_CTRLSHIFT                    4
 202 #define RF_MONSHIFT                     5
 203 #define RF_TOPSHIFT                     6
 204 #define RFTYPE_CTRL                     BIT(RF_CTRLSHIFT)
 205 #define RFTYPE_MON                      BIT(RF_MONSHIFT)
 206 #define RFTYPE_TOP                      BIT(RF_TOPSHIFT)
 207 #define RFTYPE_RES_CACHE                BIT(8)
 208 #define RFTYPE_RES_MB                   BIT(9)
 209 #define RF_CTRL_INFO                    (RFTYPE_INFO | RFTYPE_CTRL)
 210 #define RF_MON_INFO                     (RFTYPE_INFO | RFTYPE_MON)
 211 #define RF_TOP_INFO                     (RFTYPE_INFO | RFTYPE_TOP)
 212 #define RF_CTRL_BASE                    (RFTYPE_BASE | RFTYPE_CTRL)
 213
 214 /* List of all resource groups */
 215 extern struct list_head rdt_all_groups;
 216
 217 extern int max_name_width, max_data_width;
 218
 219 int __init rdtgroup_init(void);
 220 void __exit rdtgroup_exit(void);
 221
 222 /**
 223  * struct rftype - describe each file in the resctrl file system
 224  * @name:       File name
 225  * @mode:       Access mode
 226  * @kf_ops:     File operations
 227  * @flags:      File specific RFTYPE_FLAGS_* flags
 228  * @fflags:     File specific RF_* or RFTYPE_* flags
 229  * @seq_show:   Show content of the file
 230  * @write:      Write to the file
 231  */
 232 struct rftype {
 233         char                    *name;
 234         umode_t                 mode;
 235         struct kernfs_ops       *kf_ops;
 236         unsigned long           flags;
 237         unsigned long           fflags;
 238
 239         int (*seq_show)(struct kernfs_open_file *of,
 240                         struct seq_file *sf, void *v);
 241         /*
 242          * write() is the generic write callback which maps directly to
 243          * kernfs write operation and overrides all other operations.
 244          * Maximum write size is determined by ->max_write_len.
 245          */
 246         ssize_t (*write)(struct kernfs_open_file *of,
 247                          char *buf, size_t nbytes, loff_t off);
 248 };
 249
 250 /**
 251  * struct mbm_state - status for each MBM counter in each domain
 252  * @chunks:     Total data moved (multiply by rdt_group.mon_scale to get bytes)
 253  * @prev_msr    Value of IA32_QM_CTR for this RMID last time we read it
 254  * @chunks_bw   Total local data moved. Used for bandwidth calculation
 255  * @prev_bw_msr:Value of previous IA32_QM_CTR for bandwidth counting
 256  * @prev_bw     The most recent bandwidth in MBps
 257  * @delta_bw    Difference between the current and previous bandwidth
 258  * @delta_comp  Indicates whether to compute the delta_bw
 259  */
 260 struct mbm_state {
 261         u64     chunks;
 262         u64     prev_msr;
 263         u64     chunks_bw;
 264         u64     prev_bw_msr;
 265         u32     prev_bw;
 266         u32     delta_bw;
 267         bool    delta_comp;
 268 };
 269
 270 /**
 271  * struct rdt_domain - group of cpus sharing an RDT resource
 272  * @list:       all instances of this resource
 273  * @id:         unique id for this instance
 274  * @cpu_mask:   which cpus share this resource
 275  * @rmid_busy_llc:
 276  *              bitmap of which limbo RMIDs are above threshold
 277  * @mbm_total:  saved state for MBM total bandwidth
 278  * @mbm_local:  saved state for MBM local bandwidth
 279  * @mbm_over:   worker to periodically read MBM h/w counters
 280  * @cqm_limbo:  worker to periodically read CQM h/w counters
 281  * @mbm_work_cpu:
 282  *              worker cpu for MBM h/w counters
 283  * @cqm_work_cpu:
 284  *              worker cpu for CQM h/w counters
 285  * @ctrl_val:   array of cache or mem ctrl values (indexed by CLOSID)
 286  * @mbps_val:   When mba_sc is enabled, this holds the bandwidth in MBps
 287  * @new_ctrl:   new ctrl value to be loaded
 288  * @have_new_ctrl: did user provide new_ctrl for this domain
 289  * @plr:        pseudo-locked region (if any) associated with domain
 290  */
 291 struct rdt_domain {
 292         struct list_head                list;
 293         int                             id;
 294         struct cpumask                  cpu_mask;
 295         unsigned long                   *rmid_busy_llc;
 296         struct mbm_state                *mbm_total;
 297         struct mbm_state                *mbm_local;
 298         struct delayed_work             mbm_over;
 299         struct delayed_work             cqm_limbo;
 300         int                             mbm_work_cpu;
 301         int                             cqm_work_cpu;
 302         u32                             *ctrl_val;
 303         u32                             *mbps_val;
 304         u32                             new_ctrl;
 305         bool                            have_new_ctrl;
 306         struct pseudo_lock_region       *plr;
 307 };
 308
 309 /**
 310  * struct msr_param - set a range of MSRs from a domain
 311  * @res:       The resource to use
 312  * @low:       Beginning index from base MSR
 313  * @high:      End index
 314  */
 315 struct msr_param {
 316         struct rdt_resource     *res;
 317         int                     low;
 318         int                     high;
 319 };
 320
 321 /**
 322  * struct rdt_cache - Cache allocation related data
 323  * @cbm_len:            Length of the cache bit mask
 324  * @min_cbm_bits:       Minimum number of consecutive bits to be set
 325  * @cbm_idx_mult:       Multiplier of CBM index
 326  * @cbm_idx_offset:     Offset of CBM index. CBM index is computed by:
 327  *                      closid * cbm_idx_multi + cbm_idx_offset
 328  *                      in a cache bit mask
 329  * @shareable_bits:     Bitmask of shareable resource with other
 330  *                      executing entities
 331  */
 332 struct rdt_cache {
 333         unsigned int    cbm_len;
 334         unsigned int    min_cbm_bits;
 335         unsigned int    cbm_idx_mult;
 336         unsigned int    cbm_idx_offset;
 337         unsigned int    shareable_bits;
 338 };
 339
 340 /**
 341  * struct rdt_membw - Memory bandwidth allocation related data
 342  * @max_delay:          Max throttle delay. Delay is the hardware
 343  *                      representation for memory bandwidth.
 344  * @min_bw:             Minimum memory bandwidth percentage user can request
 345  * @bw_gran:            Granularity at which the memory bandwidth is allocated
 346  * @delay_linear:       True if memory B/W delay is in linear scale
 347  * @mba_sc:             True if MBA software controller(mba_sc) is enabled
 348  * @mb_map:             Mapping of memory B/W percentage to memory B/W delay
 349  */
 350 struct rdt_membw {
 351         u32             max_delay;
 352         u32             min_bw;
 353         u32             bw_gran;
 354         u32             delay_linear;
 355         bool            mba_sc;
 356         u32             *mb_map;
 357 };
 358
 359 static inline bool is_llc_occupancy_enabled(void)
 360 {
 361         return (rdt_mon_features & (1 << QOS_L3_OCCUP_EVENT_ID));
 362 }
 363
 364 static inline bool is_mbm_total_enabled(void)
 365 {
 366         return (rdt_mon_features & (1 << QOS_L3_MBM_TOTAL_EVENT_ID));
 367 }
 368
 369 static inline bool is_mbm_local_enabled(void)
 370 {
 371         return (rdt_mon_features & (1 << QOS_L3_MBM_LOCAL_EVENT_ID));
 372 }
 373
 374 static inline bool is_mbm_enabled(void)
 375 {
 376         return (is_mbm_total_enabled() || is_mbm_local_enabled());
 377 }
 378
 379 static inline bool is_mbm_event(int e)
 380 {
 381         return (e >= QOS_L3_MBM_TOTAL_EVENT_ID &&
 382                 e <= QOS_L3_MBM_LOCAL_EVENT_ID);
 383 }
 384
 385 struct rdt_parse_data {
 386         struct rdtgroup         *rdtgrp;
 387         char                    *buf;
 388 };
 389
 390 /**
 391  * struct rdt_resource - attributes of an RDT resource
 392  * @rid:                The index of the resource
 393  * @alloc_enabled:      Is allocation enabled on this machine
 394  * @mon_enabled:                Is monitoring enabled for this feature
 395  * @alloc_capable:      Is allocation available on this machine
 396  * @mon_capable:                Is monitor feature available on this machine
 397  * @name:               Name to use in "schemata" file
 398  * @num_closid:         Number of CLOSIDs available
 399  * @cache_level:        Which cache level defines scope of this resource
 400  * @default_ctrl:       Specifies default cache cbm or memory B/W percent.
 401  * @msr_base:           Base MSR address for CBMs
 402  * @msr_update:         Function pointer to update QOS MSRs
 403  * @data_width:         Character width of data when displaying
 404  * @domains:            All domains for this resource
 405  * @cache:              Cache allocation related data
 406  * @format_str:         Per resource format string to show domain value
 407  * @parse_ctrlval:      Per resource function pointer to parse control values
 408  * @evt_list:                   List of monitoring events
 409  * @num_rmid:                   Number of RMIDs available
 410  * @mon_scale:                  cqm counter * mon_scale = occupancy in bytes
 411  * @fflags:                     flags to choose base and info files
 412  */
 413 struct rdt_resource {
 414         int                     rid;
 415         bool                    alloc_enabled;
 416         bool                    mon_enabled;
 417         bool                    alloc_capable;
 418         bool                    mon_capable;
 419         char                    *name;
 420         int                     num_closid;
 421         int                     cache_level;
 422         u32                     default_ctrl;
 423         unsigned int            msr_base;
 424         void (*msr_update)      (struct rdt_domain *d, struct msr_param *m,
 425                                  struct rdt_resource *r);
 426         int                     data_width;
 427         struct list_head        domains;
 428         struct rdt_cache        cache;
 429         struct rdt_membw        membw;
 430         const char              *format_str;
 431         int (*parse_ctrlval)(struct rdt_parse_data *data,
 432                              struct rdt_resource *r,
 433                              struct rdt_domain *d);
 434         struct list_head        evt_list;
 435         int                     num_rmid;
 436         unsigned int            mon_scale;
 437         unsigned long           fflags;
 438 };
 439
 440 int parse_cbm(struct rdt_parse_data *data, struct rdt_resource *r,
 441               struct rdt_domain *d);
 442 int parse_bw(struct rdt_parse_data *data, struct rdt_resource *r,
 443              struct rdt_domain *d);
 444
 445 extern struct mutex rdtgroup_mutex;
 446
 447 extern struct rdt_resource rdt_resources_all[];
 448 extern struct rdtgroup rdtgroup_default;
 449 DECLARE_STATIC_KEY_FALSE(rdt_alloc_enable_key);
 450
 451 extern struct dentry *debugfs_resctrl;
 452
 453 enum {
 454         RDT_RESOURCE_L3,
 455         RDT_RESOURCE_L3DATA,
 456         RDT_RESOURCE_L3CODE,
 457         RDT_RESOURCE_L2,
 458         RDT_RESOURCE_L2DATA,
 459         RDT_RESOURCE_L2CODE,
 460         RDT_RESOURCE_MBA,
 461
 462         /* Must be the last */
 463         RDT_NUM_RESOURCES,
 464 };
 465
 466 #define for_each_capable_rdt_resource(r)                                      \
 467         for (r = rdt_resources_all; r < rdt_resources_all + RDT_NUM_RESOURCES;\
 468              r++)                                                             \
 469                 if (r->alloc_capable || r->mon_capable)
 470
 471 #define for_each_alloc_capable_rdt_resource(r)                                \
 472         for (r = rdt_resources_all; r < rdt_resources_all + RDT_NUM_RESOURCES;\
 473              r++)                                                             \
 474                 if (r->alloc_capable)
 475
 476 #define for_each_mon_capable_rdt_resource(r)                                  \
 477         for (r = rdt_resources_all; r < rdt_resources_all + RDT_NUM_RESOURCES;\
 478              r++)                                                             \
 479                 if (r->mon_capable)
 480
 481 #define for_each_alloc_enabled_rdt_resource(r)                                \
 482         for (r = rdt_resources_all; r < rdt_resources_all + RDT_NUM_RESOURCES;\
 483              r++)                                                             \
 484                 if (r->alloc_enabled)
 485
 486 #define for_each_mon_enabled_rdt_resource(r)                                  \
 487         for (r = rdt_resources_all; r < rdt_resources_all + RDT_NUM_RESOURCES;\
 488              r++)                                                             \
 489                 if (r->mon_enabled)
 490
 491 /* CPUID.(EAX=10H, ECX=ResID=1).EAX */
 492 union cpuid_0x10_1_eax {
 493         struct {
 494                 unsigned int cbm_len:5;
 495         } split;
 496         unsigned int full;
 497 };
 498
 499 /* CPUID.(EAX=10H, ECX=ResID=3).EAX */
 500 union cpuid_0x10_3_eax {
 501         struct {
 502                 unsigned int max_delay:12;
 503         } split;
 504         unsigned int full;
 505 };
 506
 507 /* CPUID.(EAX=10H, ECX=ResID).EDX */
 508 union cpuid_0x10_x_edx {
 509         struct {
 510                 unsigned int cos_max:16;
 511         } split;
 512         unsigned int full;
 513 };
 514
 515 void rdt_last_cmd_clear(void);
 516 void rdt_last_cmd_puts(const char *s);
 517 void rdt_last_cmd_printf(const char *fmt, ...);
 518
 519 void rdt_ctrl_update(void *arg);
 520 struct rdtgroup *rdtgroup_kn_lock_live(struct kernfs_node *kn);
 521 void rdtgroup_kn_unlock(struct kernfs_node *kn);
 522 int rdtgroup_kn_mode_restrict(struct rdtgroup *r, const char *name);
 523 int rdtgroup_kn_mode_restore(struct rdtgroup *r, const char *name,
 524                              umode_t mask);
 525 struct rdt_domain *rdt_find_domain(struct rdt_resource *r, int id,
 526                                    struct list_head **pos);
 527 ssize_t rdtgroup_schemata_write(struct kernfs_open_file *of,
 528                                 char *buf, size_t nbytes, loff_t off);
 529 int rdtgroup_schemata_show(struct kernfs_open_file *of,
 530                            struct seq_file *s, void *v);
 531 bool rdtgroup_cbm_overlaps(struct rdt_resource *r, struct rdt_domain *d,
 532                            unsigned long cbm, int closid, bool exclusive);
 533 unsigned int rdtgroup_cbm_to_size(struct rdt_resource *r, struct rdt_domain *d,
 534                                   unsigned long cbm);
 535 enum rdtgrp_mode rdtgroup_mode_by_closid(int closid);
 536 int rdtgroup_tasks_assigned(struct rdtgroup *r);
 537 int rdtgroup_locksetup_enter(struct rdtgroup *rdtgrp);
 538 int rdtgroup_locksetup_exit(struct rdtgroup *rdtgrp);
 539 bool rdtgroup_cbm_overlaps_pseudo_locked(struct rdt_domain *d, unsigned long cbm);
 540 bool rdtgroup_pseudo_locked_in_hierarchy(struct rdt_domain *d);
 541 int rdt_pseudo_lock_init(void);
 542 void rdt_pseudo_lock_release(void);
 543 int rdtgroup_pseudo_lock_create(struct rdtgroup *rdtgrp);
 544 void rdtgroup_pseudo_lock_remove(struct rdtgroup *rdtgrp);
 545 struct rdt_domain *get_domain_from_cpu(int cpu, struct rdt_resource *r);
 546 int update_domains(struct rdt_resource *r, int closid);
 547 int closids_supported(void);
 548 void closid_free(int closid);
 549 int alloc_rmid(void);
 550 void free_rmid(u32 rmid);
 551 int rdt_get_mon_l3_config(struct rdt_resource *r);
 552 void mon_event_count(void *info);
 553 int rdtgroup_mondata_show(struct seq_file *m, void *arg);
 554 void rmdir_mondata_subdir_allrdtgrp(struct rdt_resource *r,
 555                                     unsigned int dom_id);
 556 void mkdir_mondata_subdir_allrdtgrp(struct rdt_resource *r,
 557                                     struct rdt_domain *d);
 558 void mon_event_read(struct rmid_read *rr, struct rdt_domain *d,
 559                     struct rdtgroup *rdtgrp, int evtid, int first);
 560 void mbm_setup_overflow_handler(struct rdt_domain *dom,
 561                                 unsigned long delay_ms);
 562 void mbm_handle_overflow(struct work_struct *work);
 563 bool is_mba_sc(struct rdt_resource *r);
 564 void setup_default_ctrlval(struct rdt_resource *r, u32 *dc, u32 *dm);
 565 u32 delay_bw_map(unsigned long bw, struct rdt_resource *r);
 566 void cqm_setup_limbo_handler(struct rdt_domain *dom, unsigned long delay_ms);
 567 void cqm_handle_limbo(struct work_struct *work);
 568 bool has_busy_rmid(struct rdt_resource *r, struct rdt_domain *d);
 569 void __check_limbo(struct rdt_domain *d, bool force_free);
 570
 571 #endif /* _ASM_X86_INTEL_RDT_H */