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dmake: do not set MAKEFLAGS=k
[unleashed/tickless.git] / kernel / syscall / lgrpsys.c
blobefb1620081ece3ff21cf4f7c66b86708326d0c6c
1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 * Copyright 2015 Joyent, Inc.
26 */
27
28 /*
29 * lgroup system calls
30 */
31
32 #include <sys/types.h>
33 #include <sys/errno.h>
34 #include <sys/sunddi.h>
35 #include <sys/systm.h>
36 #include <sys/mman.h>
37 #include <sys/cpupart.h>
38 #include <sys/lgrp.h>
39 #include <sys/lgrp_user.h>
40 #include <sys/promif.h> /* for prom_printf() */
41 #include <sys/sysmacros.h>
42 #include <sys/policy.h>
43
44 #include <vm/as.h>
45
46
47 /* definitions for mi_validity */
48 #define VALID_ADDR 1
49 #define VALID_REQ 2
50
51 /*
52 * run through the given number of addresses and requests and return the
53 * corresponding memory information for each address
54 */
55 static int
56 meminfo(int addr_count, struct meminfo *mip)
57 {
58 size_t in_size, out_size, req_size, val_size;
59 struct as *as;
60 struct hat *hat;
61 int i, j, out_idx, info_count;
62 lgrp_t *lgrp;
63 pfn_t pfn;
64 ssize_t pgsz;
65 int *req_array, *val_array;
66 uint64_t *in_array, *out_array;
67 uint64_t addr, paddr;
68 uintptr_t vaddr;
69 int ret = 0;
70 struct meminfo minfo;
71 #if defined(_SYSCALL32_IMPL)
72 struct meminfo32 minfo32;
73 #endif
74
75 /*
76 * Make sure that there is at least one address to translate and
77 * limit how many virtual addresses the kernel can do per call
78 */
79 if (addr_count < 1)
80 return (set_errno(EINVAL));
81 else if (addr_count > MAX_MEMINFO_CNT)
82 addr_count = MAX_MEMINFO_CNT;
83
84 if (get_udatamodel() == DATAMODEL_NATIVE) {
85 if (copyin(mip, &minfo, sizeof (struct meminfo)))
86 return (set_errno(EFAULT));
87 }
88 #if defined(_SYSCALL32_IMPL)
89 else {
90 bzero(&minfo, sizeof (minfo));
91 if (copyin(mip, &minfo32, sizeof (struct meminfo32)))
92 return (set_errno(EFAULT));
93 minfo.mi_inaddr = (const uint64_t *)(uintptr_t)
94 minfo32.mi_inaddr;
95 minfo.mi_info_req = (const uint_t *)(uintptr_t)
96 minfo32.mi_info_req;
97 minfo.mi_info_count = minfo32.mi_info_count;
98 minfo.mi_outdata = (uint64_t *)(uintptr_t)
99 minfo32.mi_outdata;
100 minfo.mi_validity = (uint_t *)(uintptr_t)
101 minfo32.mi_validity;
102 }
103 #endif
104 /*
105 * all the input parameters have been copied in:-
106 * addr_count - number of input addresses
107 * minfo.mi_inaddr - array of input addresses
108 * minfo.mi_info_req - array of types of information requested
109 * minfo.mi_info_count - no. of pieces of info requested for each addr
110 * minfo.mi_outdata - array into which the results are placed
111 * minfo.mi_validity - array containing bitwise result codes; 0th bit
112 * evaluates validity of corresponding input
113 * address, 1st bit validity of response to first
114 * member of info_req, etc.
115 */
116
117 /* make sure mi_info_count is within limit */
118 info_count = minfo.mi_info_count;
119 if (info_count < 1 || info_count > MAX_MEMINFO_REQ)
120 return (set_errno(EINVAL));
121
122 /*
123 * allocate buffer in_array for the input addresses and copy them in
124 */
125 in_size = sizeof (uint64_t) * addr_count;
126 in_array = kmem_alloc(in_size, KM_SLEEP);
127 if (copyin(minfo.mi_inaddr, in_array, in_size)) {
128 kmem_free(in_array, in_size);
129 return (set_errno(EFAULT));
130 }
131
132 /*
133 * allocate buffer req_array for the input info_reqs and copy them in
134 */
135 req_size = sizeof (uint_t) * info_count;
136 req_array = kmem_alloc(req_size, KM_SLEEP);
137 if (copyin(minfo.mi_info_req, req_array, req_size)) {
138 kmem_free(req_array, req_size);
139 kmem_free(in_array, in_size);
140 return (set_errno(EFAULT));
141 }
142
143 /*
144 * Validate privs for each req.
145 */
146 for (i = 0; i < info_count; i++) {
147 switch (req_array[i] & MEMINFO_MASK) {
148 case MEMINFO_VLGRP:
149 case MEMINFO_VPAGESIZE:
150 break;
151 default:
152 if (secpolicy_meminfo(CRED()) != 0) {
153 kmem_free(req_array, req_size);
154 kmem_free(in_array, in_size);
155 return (set_errno(EPERM));
156 }
157 break;
158 }
159 }
160
161 /*
162 * allocate buffer out_array which holds the results and will have
163 * to be copied out later
164 */
165 out_size = sizeof (uint64_t) * addr_count * info_count;
166 out_array = kmem_alloc(out_size, KM_SLEEP);
167
168 /*
169 * allocate buffer val_array which holds the validity bits and will
170 * have to be copied out later
171 */
172 val_size = sizeof (uint_t) * addr_count;
173 val_array = kmem_alloc(val_size, KM_SLEEP);
174
175 if ((req_array[0] & MEMINFO_MASK) == MEMINFO_PLGRP) {
176 /* find the corresponding lgroup for each physical address */
177 for (i = 0; i < addr_count; i++) {
178 paddr = in_array[i];
179 pfn = btop(paddr);
180 lgrp = lgrp_pfn_to_lgrp(pfn);
181 if (lgrp) {
182 out_array[i] = lgrp->lgrp_id;
183 val_array[i] = VALID_ADDR | VALID_REQ;
184 } else {
185 out_array[i] = (uintptr_t)NULL;
186 val_array[i] = 0;
187 }
188 }
189 } else {
190 /* get the corresponding memory info for each virtual address */
191 as = curproc->p_as;
192
193 AS_LOCK_ENTER(as, RW_READER);
194 hat = as->a_hat;
195 for (i = out_idx = 0; i < addr_count; i++, out_idx +=
196 info_count) {
197 addr = in_array[i];
198 vaddr = (uintptr_t)(addr & ~PAGEOFFSET);
199 if (!as_segat(as, (caddr_t)vaddr)) {
200 val_array[i] = 0;
201 continue;
202 }
203 val_array[i] = VALID_ADDR;
204 pfn = hat_getpfnum(hat, (caddr_t)vaddr);
205 if (pfn != PFN_INVALID) {
206 paddr = (uint64_t)((pfn << PAGESHIFT) |
207 (addr & PAGEOFFSET));
208 for (j = 0; j < info_count; j++) {
209 switch (req_array[j] & MEMINFO_MASK) {
210 case MEMINFO_VPHYSICAL:
211 /*
212 * return the physical address
213 * corresponding to the input
214 * virtual address
215 */
216 out_array[out_idx + j] = paddr;
217 val_array[i] |= VALID_REQ << j;
218 break;
219 case MEMINFO_VLGRP:
220 /*
221 * return the lgroup of physical
222 * page corresponding to the
223 * input virtual address
224 */
225 lgrp = lgrp_pfn_to_lgrp(pfn);
226 if (lgrp) {
227 out_array[out_idx + j] =
228 lgrp->lgrp_id;
229 val_array[i] |=
230 VALID_REQ << j;
231 }
232 break;
233 case MEMINFO_VPAGESIZE:
234 /*
235 * return the size of physical
236 * page corresponding to the
237 * input virtual address
238 */
239 pgsz = hat_getpagesize(hat,
240 (caddr_t)vaddr);
241 if (pgsz != -1) {
242 out_array[out_idx + j] =
243 pgsz;
244 val_array[i] |=
245 VALID_REQ << j;
246 }
247 break;
248 case MEMINFO_VREPLCNT:
249 /*
250 * for future use:-
251 * return the no. replicated
252 * physical pages corresponding
253 * to the input virtual address,
254 * so it is always 0 at the
255 * moment
256 */
257 out_array[out_idx + j] = 0;
258 val_array[i] |= VALID_REQ << j;
259 break;
260 case MEMINFO_VREPL:
261 /*
262 * for future use:-
263 * return the nth physical
264 * replica of the specified
265 * virtual address
266 */
267 break;
268 case MEMINFO_VREPL_LGRP:
269 /*
270 * for future use:-
271 * return the lgroup of nth
272 * physical replica of the
273 * specified virtual address
274 */
275 break;
276 case MEMINFO_PLGRP:
277 /*
278 * this is for physical address
279 * only, shouldn't mix with
280 * virtual address
281 */
282 break;
283 default:
284 break;
285 }
286 }
287 }
288 }
289 AS_LOCK_EXIT(as);
290 }
291
292 /* copy out the results and validity bits and free the buffers */
293 if ((copyout(out_array, minfo.mi_outdata, out_size) != 0) ||
294 (copyout(val_array, minfo.mi_validity, val_size) != 0))
295 ret = set_errno(EFAULT);
296
297 kmem_free(in_array, in_size);
298 kmem_free(out_array, out_size);
299 kmem_free(req_array, req_size);
300 kmem_free(val_array, val_size);
301
302 return (ret);
303 }
304
305
306 /*
307 * Initialize lgroup affinities for thread
308 */
309 void
310 lgrp_affinity_init(lgrp_affinity_t **bufaddr)
311 {
312 if (bufaddr)
313 *bufaddr = NULL;
314 }
315
316
317 /*
318 * Free lgroup affinities for thread and set to NULL
319 * just in case thread gets recycled
320 */
321 void
322 lgrp_affinity_free(lgrp_affinity_t **bufaddr)
323 {
324 if (bufaddr && *bufaddr) {
325 kmem_free(*bufaddr, nlgrpsmax * sizeof (lgrp_affinity_t));
326 *bufaddr = NULL;
327 }
328 }
329
330
331 #define P_ANY -2 /* cookie specifying any ID */
332
333
334 /*
335 * Find LWP with given ID in specified process and get its affinity for
336 * specified lgroup
337 */
338 lgrp_affinity_t
339 lgrp_affinity_get_thread(proc_t *p, id_t lwpid, lgrp_id_t lgrp)
340 {
341 lgrp_affinity_t aff;
342 int found;
343 kthread_t *t;
344
345 ASSERT(MUTEX_HELD(&p->p_lock));
346
347 aff = LGRP_AFF_NONE;
348 found = 0;
349 t = p->p_tlist;
350 /*
351 * The process may be executing in proc_exit() and its p->p_list may be
352 * already NULL.
353 */
354 if (t == NULL)
355 return (set_errno(ESRCH));
356
357 do {
358 if (t->t_tid == lwpid || lwpid == P_ANY) {
359 thread_lock(t);
360 /*
361 * Check to see whether caller has permission to set
362 * affinity for LWP
363 */
364 if (t->t_cid == 0 || !hasprocperm(t->t_cred, CRED())) {
365 thread_unlock(t);
366 return (set_errno(EPERM));
367 }
368
369 if (t->t_lgrp_affinity)
370 aff = t->t_lgrp_affinity[lgrp];
371 thread_unlock(t);
372 found = 1;
373 break;
374 }
375 } while ((t = t->t_forw) != p->p_tlist);
376 if (!found)
377 aff = set_errno(ESRCH);
378
379 return (aff);
380 }
381
382
383 /*
384 * Get lgroup affinity for given LWP
385 */
386 lgrp_affinity_t
387 lgrp_affinity_get(lgrp_affinity_args_t *ap)
388 {
389 lgrp_affinity_t aff;
390 lgrp_affinity_args_t args;
391 id_t id;
392 idtype_t idtype;
393 lgrp_id_t lgrp;
394 proc_t *p;
395 kthread_t *t;
396
397 /*
398 * Copyin arguments
399 */
400 if (copyin(ap, &args, sizeof (lgrp_affinity_args_t)) != 0)
401 return (set_errno(EFAULT));
402
403 id = args.id;
404 idtype = args.idtype;
405 lgrp = args.lgrp;
406
407 /*
408 * Check for invalid lgroup
409 */
410 if (lgrp < 0 || lgrp == LGRP_NONE)
411 return (set_errno(EINVAL));
412
413 /*
414 * Check for existing lgroup
415 */
416 if (lgrp > lgrp_alloc_max)
417 return (set_errno(ESRCH));
418
419 /*
420 * Get lgroup affinity for given LWP or process
421 */
422 switch (idtype) {
423
424 case P_LWPID:
425 /*
426 * LWP in current process
427 */
428 p = curproc;
429 mutex_enter(&p->p_lock);
430 if (id != P_MYID) /* different thread */
431 aff = lgrp_affinity_get_thread(p, id, lgrp);
432 else { /* current thread */
433 aff = LGRP_AFF_NONE;
434 t = curthread;
435 thread_lock(t);
436 if (t->t_lgrp_affinity)
437 aff = t->t_lgrp_affinity[lgrp];
438 thread_unlock(t);
439 }
440 mutex_exit(&p->p_lock);
441 break;
442
443 case P_PID:
444 /*
445 * Process
446 */
447 mutex_enter(&pidlock);
448
449 if (id == P_MYID)
450 p = curproc;
451 else {
452 p = prfind(id);
453 if (p == NULL) {
454 mutex_exit(&pidlock);
455 return (set_errno(ESRCH));
456 }
457 }
458
459 mutex_enter(&p->p_lock);
460 aff = lgrp_affinity_get_thread(p, P_ANY, lgrp);
461 mutex_exit(&p->p_lock);
462
463 mutex_exit(&pidlock);
464 break;
465
466 default:
467 aff = set_errno(EINVAL);
468 break;
469 }
470
471 return (aff);
472 }
473
474
475 /*
476 * Find lgroup for which this thread has most affinity in specified partition
477 * starting from home lgroup unless specified starting lgroup is preferred
478 */
479 lpl_t *
480 lgrp_affinity_best(kthread_t *t, struct cpupart *cpupart, lgrp_id_t start,
481 boolean_t prefer_start)
482 {
483 lgrp_affinity_t *affs;
484 lgrp_affinity_t best_aff;
485 lpl_t *best_lpl;
486 lgrp_id_t finish;
487 lgrp_id_t home;
488 lgrp_id_t lgrpid;
489 lpl_t *lpl;
490
491 ASSERT(t != NULL);
492 ASSERT((MUTEX_HELD(&cpu_lock) || curthread->t_preempt > 0) ||
493 (MUTEX_HELD(&ttoproc(t)->p_lock) && THREAD_LOCK_HELD(t)));
494 ASSERT(cpupart != NULL);
495
496 if (t->t_lgrp_affinity == NULL)
497 return (NULL);
498
499 affs = t->t_lgrp_affinity;
500
501 /*
502 * Thread bound to CPU
503 */
504 if (t->t_bind_cpu != PBIND_NONE) {
505 cpu_t *cp;
506
507 /*
508 * Find which lpl has most affinity among leaf lpl directly
509 * containing CPU and its ancestor lpls
510 */
511 cp = cpu[t->t_bind_cpu];
512
513 best_lpl = lpl = cp->cpu_lpl;
514 best_aff = affs[best_lpl->lpl_lgrpid];
515 while (lpl->lpl_parent != NULL) {
516 lpl = lpl->lpl_parent;
517 lgrpid = lpl->lpl_lgrpid;
518 if (affs[lgrpid] > best_aff) {
519 best_lpl = lpl;
520 best_aff = affs[lgrpid];
521 }
522 }
523 return (best_lpl);
524 }
525
526 /*
527 * Start searching from home lgroup unless given starting lgroup is
528 * preferred or home lgroup isn't in given pset. Use root lgroup as
529 * starting point if both home and starting lgroups aren't in given
530 * pset.
531 */
532 ASSERT(start >= 0 && start <= lgrp_alloc_max);
533 home = t->t_lpl->lpl_lgrpid;
534 if (!prefer_start && LGRP_CPUS_IN_PART(home, cpupart))
535 lgrpid = home;
536 else if (start != LGRP_NONE && LGRP_CPUS_IN_PART(start, cpupart))
537 lgrpid = start;
538 else
539 lgrpid = LGRP_ROOTID;
540
541 best_lpl = &cpupart->cp_lgrploads[lgrpid];
542 best_aff = affs[lgrpid];
543 finish = lgrpid;
544 do {
545 /*
546 * Skip any lgroups that don't have CPU resources
547 * in this processor set.
548 */
549 if (!LGRP_CPUS_IN_PART(lgrpid, cpupart)) {
550 if (++lgrpid > lgrp_alloc_max)
551 lgrpid = 0; /* wrap the search */
552 continue;
553 }
554
555 /*
556 * Find lgroup with most affinity
557 */
558 lpl = &cpupart->cp_lgrploads[lgrpid];
559 if (affs[lgrpid] > best_aff) {
560 best_aff = affs[lgrpid];
561 best_lpl = lpl;
562 }
563
564 if (++lgrpid > lgrp_alloc_max)
565 lgrpid = 0; /* wrap the search */
566
567 } while (lgrpid != finish);
568
569 /*
570 * No lgroup (in this pset) with any affinity
571 */
572 if (best_aff == LGRP_AFF_NONE)
573 return (NULL);
574
575 lgrpid = best_lpl->lpl_lgrpid;
576 ASSERT(LGRP_CPUS_IN_PART(lgrpid, cpupart) && best_lpl->lpl_ncpu > 0);
577
578 return (best_lpl);
579 }
580
581
582 /*
583 * Set thread's affinity for given lgroup
584 */
585 int
586 lgrp_affinity_set_thread(kthread_t *t, lgrp_id_t lgrp, lgrp_affinity_t aff,
587 lgrp_affinity_t **aff_buf)
588 {
589 lgrp_affinity_t *affs;
590 lgrp_id_t best;
591 lpl_t *best_lpl;
592 lgrp_id_t home;
593 int retval;
594
595 ASSERT(t != NULL);
596 ASSERT(MUTEX_HELD(&ttoproc(t)->p_lock));
597
598 retval = 0;
599
600 thread_lock(t);
601
602 /*
603 * Check to see whether caller has permission to set affinity for
604 * thread
605 */
606 if (t->t_cid == 0 || !hasprocperm(t->t_cred, CRED())) {
607 thread_unlock(t);
608 return (set_errno(EPERM));
609 }
610
611 if (t->t_lgrp_affinity == NULL) {
612 if (aff == LGRP_AFF_NONE) {
613 thread_unlock(t);
614 return (0);
615 }
616 ASSERT(aff_buf != NULL && *aff_buf != NULL);
617 t->t_lgrp_affinity = *aff_buf;
618 *aff_buf = NULL;
619 }
620
621 affs = t->t_lgrp_affinity;
622 affs[lgrp] = aff;
623
624 /*
625 * Find lgroup for which thread has most affinity,
626 * starting with lgroup for which affinity being set
627 */
628 best_lpl = lgrp_affinity_best(t, t->t_cpupart, lgrp, B_TRUE);
629
630 /*
631 * Rehome if found lgroup with more affinity than home or lgroup for
632 * which affinity is being set has same affinity as home
633 */
634 home = t->t_lpl->lpl_lgrpid;
635 if (best_lpl != NULL && best_lpl != t->t_lpl) {
636 best = best_lpl->lpl_lgrpid;
637 if (affs[best] > affs[home] || (affs[best] == affs[home] &&
638 best == lgrp))
639 lgrp_move_thread(t, best_lpl, 1);
640 }
641
642 thread_unlock(t);
643
644 return (retval);
645 }
646
647
648 /*
649 * Set process' affinity for specified lgroup
650 */
651 int
652 lgrp_affinity_set_proc(proc_t *p, lgrp_id_t lgrp, lgrp_affinity_t aff,
653 lgrp_affinity_t **aff_buf_array)
654 {
655 lgrp_affinity_t *buf;
656 int err = 0;
657 int i;
658 int retval;
659 kthread_t *t;
660
661 ASSERT(MUTEX_HELD(&pidlock) && MUTEX_HELD(&p->p_lock));
662 ASSERT(aff_buf_array != NULL);
663
664 i = 0;
665 t = p->p_tlist;
666 if (t != NULL) {
667 do {
668 /*
669 * Set lgroup affinity for thread
670 */
671 buf = aff_buf_array[i];
672 retval = lgrp_affinity_set_thread(t, lgrp, aff, &buf);
673
674 if (err == 0 && retval != 0)
675 err = retval;
676
677 /*
678 * Advance pointer to next buffer
679 */
680 if (buf == NULL) {
681 ASSERT(i < p->p_lwpcnt);
682 aff_buf_array[i] = NULL;
683 i++;
684 }
685
686 } while ((t = t->t_forw) != p->p_tlist);
687 }
688 return (err);
689 }
690
691
692 /*
693 * Set LWP's or process' affinity for specified lgroup
694 *
695 * When setting affinities, pidlock, process p_lock, and thread_lock()
696 * need to be held in that order to protect target thread's pset, process,
697 * process contents, and thread contents. thread_lock() does splhigh(),
698 * so it ends up having similiar effect as kpreempt_disable(), so it will
699 * protect calls to lgrp_move_thread() and lgrp_choose() from pset changes.
700 */
701 int
702 lgrp_affinity_set(lgrp_affinity_args_t *ap)
703 {
704 lgrp_affinity_t aff;
705 lgrp_affinity_t *aff_buf;
706 lgrp_affinity_args_t args;
707 id_t id;
708 idtype_t idtype;
709 lgrp_id_t lgrp;
710 int nthreads;
711 proc_t *p;
712 int retval;
713
714 /*
715 * Copyin arguments
716 */
717 if (copyin(ap, &args, sizeof (lgrp_affinity_args_t)) != 0)
718 return (set_errno(EFAULT));
719
720 idtype = args.idtype;
721 id = args.id;
722 lgrp = args.lgrp;
723 aff = args.aff;
724
725 /*
726 * Check for invalid lgroup
727 */
728 if (lgrp < 0 || lgrp == LGRP_NONE)
729 return (set_errno(EINVAL));
730
731 /*
732 * Check for existing lgroup
733 */
734 if (lgrp > lgrp_alloc_max)
735 return (set_errno(ESRCH));
736
737 /*
738 * Check for legal affinity
739 */
740 if (aff != LGRP_AFF_NONE && aff != LGRP_AFF_WEAK &&
741 aff != LGRP_AFF_STRONG)
742 return (set_errno(EINVAL));
743
744 /*
745 * Must be process or LWP ID
746 */
747 if (idtype != P_LWPID && idtype != P_PID)
748 return (set_errno(EINVAL));
749
750 /*
751 * Set given LWP's or process' affinity for specified lgroup
752 */
753 switch (idtype) {
754
755 case P_LWPID:
756 /*
757 * Allocate memory for thread's lgroup affinities
758 * ahead of time w/o holding locks
759 */
760 aff_buf = kmem_zalloc(nlgrpsmax * sizeof (lgrp_affinity_t),
761 KM_SLEEP);
762
763 p = curproc;
764
765 /*
766 * Set affinity for thread
767 */
768 mutex_enter(&p->p_lock);
769 if (id == P_MYID) { /* current thread */
770 retval = lgrp_affinity_set_thread(curthread, lgrp, aff,
771 &aff_buf);
772 } else if (p->p_tlist == NULL) {
773 retval = set_errno(ESRCH);
774 } else { /* other thread */
775 int found = 0;
776 kthread_t *t;
777
778 t = p->p_tlist;
779 do {
780 if (t->t_tid == id) {
781 retval = lgrp_affinity_set_thread(t,
782 lgrp, aff, &aff_buf);
783 found = 1;
784 break;
785 }
786 } while ((t = t->t_forw) != p->p_tlist);
787 if (!found)
788 retval = set_errno(ESRCH);
789 }
790 mutex_exit(&p->p_lock);
791
792 /*
793 * Free memory for lgroup affinities,
794 * since thread didn't need it
795 */
796 if (aff_buf)
797 kmem_free(aff_buf,
798 nlgrpsmax * sizeof (lgrp_affinity_t));
799
800 break;
801
802 case P_PID:
803
804 do {
805 lgrp_affinity_t **aff_buf_array;
806 int i;
807 size_t size;
808
809 /*
810 * Get process
811 */
812 mutex_enter(&pidlock);
813
814 if (id == P_MYID)
815 p = curproc;
816 else
817 p = prfind(id);
818
819 if (p == NULL) {
820 mutex_exit(&pidlock);
821 return (set_errno(ESRCH));
822 }
823
824 /*
825 * Get number of threads in process
826 *
827 * NOTE: Only care about user processes,
828 * so p_lwpcnt should be number of threads.
829 */
830 mutex_enter(&p->p_lock);
831 nthreads = p->p_lwpcnt;
832 mutex_exit(&p->p_lock);
833
834 mutex_exit(&pidlock);
835
836 if (nthreads < 1)
837 return (set_errno(ESRCH));
838
839 /*
840 * Preallocate memory for lgroup affinities for
841 * each thread in process now to avoid holding
842 * any locks. Allocate an array to hold a buffer
843 * for each thread.
844 */
845 aff_buf_array = kmem_zalloc(nthreads *
846 sizeof (lgrp_affinity_t *), KM_SLEEP);
847
848 size = nlgrpsmax * sizeof (lgrp_affinity_t);
849 for (i = 0; i < nthreads; i++)
850 aff_buf_array[i] = kmem_zalloc(size, KM_SLEEP);
851
852 mutex_enter(&pidlock);
853
854 /*
855 * Get process again since dropped locks to allocate
856 * memory (except current process)
857 */
858 if (id != P_MYID)
859 p = prfind(id);
860
861 /*
862 * Process went away after we dropped locks and before
863 * reacquiring them, so drop locks, free memory, and
864 * return.
865 */
866 if (p == NULL) {
867 mutex_exit(&pidlock);
868 for (i = 0; i < nthreads; i++)
869 kmem_free(aff_buf_array[i], size);
870 kmem_free(aff_buf_array,
871 nthreads * sizeof (lgrp_affinity_t *));
872 return (set_errno(ESRCH));
873 }
874
875 mutex_enter(&p->p_lock);
876
877 /*
878 * See whether number of threads is same
879 * If not, drop locks, free memory, and try again
880 */
881 if (nthreads != p->p_lwpcnt) {
882 mutex_exit(&p->p_lock);
883 mutex_exit(&pidlock);
884 for (i = 0; i < nthreads; i++)
885 kmem_free(aff_buf_array[i], size);
886 kmem_free(aff_buf_array,
887 nthreads * sizeof (lgrp_affinity_t *));
888 continue;
889 }
890
891 /*
892 * Set lgroup affinity for threads in process
893 */
894 retval = lgrp_affinity_set_proc(p, lgrp, aff,
895 aff_buf_array);
896
897 mutex_exit(&p->p_lock);
898 mutex_exit(&pidlock);
899
900 /*
901 * Free any leftover memory, since some threads may
902 * have already allocated memory and set lgroup
903 * affinities before
904 */
905 for (i = 0; i < nthreads; i++)
906 if (aff_buf_array[i] != NULL)
907 kmem_free(aff_buf_array[i], size);
908 kmem_free(aff_buf_array,
909 nthreads * sizeof (lgrp_affinity_t *));
910
911 break;
912
913 } while (nthreads != p->p_lwpcnt);
914
915 break;
916
917 default:
918 retval = set_errno(EINVAL);
919 break;
920 }
921
922 return (retval);
923 }
924
925
926 /*
927 * Return the latest generation number for the lgroup hierarchy
928 * with the given view
929 */
930 lgrp_gen_t
931 lgrp_generation(lgrp_view_t view)
932 {
933 cpupart_t *cpupart;
934 uint_t gen;
935
936 kpreempt_disable();
937
938 /*
939 * Determine generation number for given view
940 */
941 if (view == LGRP_VIEW_OS)
942 /*
943 * Return generation number of lgroup hierarchy for OS view
944 */
945 gen = lgrp_gen;
946 else {
947 /*
948 * For caller's view, use generation numbers for lgroup
949 * hierarchy and caller's pset
950 * NOTE: Caller needs to check for change in pset ID
951 */
952 cpupart = curthread->t_cpupart;
953 ASSERT(cpupart);
954 gen = lgrp_gen + cpupart->cp_gen;
955 }
956
957 kpreempt_enable();
958
959 return (gen);
960 }
961
962
963 lgrp_id_t
964 lgrp_home_thread(kthread_t *t)
965 {
966 lgrp_id_t home;
967
968 ASSERT(t != NULL);
969 ASSERT(MUTEX_HELD(&ttoproc(t)->p_lock));
970
971 thread_lock(t);
972
973 /*
974 * Check to see whether caller has permission to set affinity for
975 * thread
976 */
977 if (t->t_cid == 0 || !hasprocperm(t->t_cred, CRED())) {
978 thread_unlock(t);
979 return (set_errno(EPERM));
980 }
981
982 home = lgrp_home_id(t);
983
984 thread_unlock(t);
985 return (home);
986 }
987
988
989 /*
990 * Get home lgroup of given process or thread
991 */
992 lgrp_id_t
993 lgrp_home_get(idtype_t idtype, id_t id)
994 {
995 proc_t *p;
996 lgrp_id_t retval;
997 kthread_t *t;
998
999 /*
1000 * Get home lgroup of given LWP or process
1001 */
1002 switch (idtype) {
1003
1004 case P_LWPID:
1005 p = curproc;
1006
1007 /*
1008 * Set affinity for thread
1009 */
1010 mutex_enter(&p->p_lock);
1011 if (id == P_MYID) { /* current thread */
1012 retval = lgrp_home_thread(curthread);
1013 } else if (p->p_tlist == NULL) {
1014 retval = set_errno(ESRCH);
1015 } else { /* other thread */
1016 int found = 0;
1017
1018 t = p->p_tlist;
1019 do {
1020 if (t->t_tid == id) {
1021 retval = lgrp_home_thread(t);
1022 found = 1;
1023 break;
1024 }
1025 } while ((t = t->t_forw) != p->p_tlist);
1026 if (!found)
1027 retval = set_errno(ESRCH);
1028 }
1029 mutex_exit(&p->p_lock);
1030 break;
1031
1032 case P_PID:
1033 /*
1034 * Get process
1035 */
1036 mutex_enter(&pidlock);
1037
1038 if (id == P_MYID)
1039 p = curproc;
1040 else
1041 p = prfind(id);
1042
1043 if (p == NULL) {
1044 mutex_exit(&pidlock);
1045 return (set_errno(ESRCH));
1046 }
1047
1048 mutex_enter(&p->p_lock);
1049 t = p->p_tlist;
1050 if (t == NULL)
1051 retval = set_errno(ESRCH);
1052 else
1053 retval = lgrp_home_thread(t);
1054 mutex_exit(&p->p_lock);
1055
1056 mutex_exit(&pidlock);
1057
1058 break;
1059
1060 default:
1061 retval = set_errno(EINVAL);
1062 break;
1063 }
1064
1065 return (retval);
1066 }
1067
1068
1069 /*
1070 * Return latency between "from" and "to" lgroups
1071 *
1072 * This latency number can only be used for relative comparison
1073 * between lgroups on the running system, cannot be used across platforms,
1074 * and may not reflect the actual latency. It is platform and implementation
1075 * specific, so platform gets to decide its value. It would be nice if the
1076 * number was at least proportional to make comparisons more meaningful though.
1077 */
1078 int
1079 lgrp_latency(lgrp_id_t from, lgrp_id_t to)
1080 {
1081 lgrp_t *from_lgrp;
1082 int i;
1083 int latency;
1084 int latency_max;
1085 lgrp_t *to_lgrp;
1086
1087 ASSERT(MUTEX_HELD(&cpu_lock));
1088
1089 if (from < 0 || to < 0)
1090 return (set_errno(EINVAL));
1091
1092 if (from > lgrp_alloc_max || to > lgrp_alloc_max)
1093 return (set_errno(ESRCH));
1094
1095 from_lgrp = lgrp_table[from];
1096 to_lgrp = lgrp_table[to];
1097
1098 if (!LGRP_EXISTS(from_lgrp) || !LGRP_EXISTS(to_lgrp)) {
1099 return (set_errno(ESRCH));
1100 }
1101
1102 /*
1103 * Get latency for same lgroup
1104 */
1105 if (from == to) {
1106 latency = from_lgrp->lgrp_latency;
1107 return (latency);
1108 }
1109
1110 /*
1111 * Get latency between leaf lgroups
1112 */
1113 if (from_lgrp->lgrp_childcnt == 0 && to_lgrp->lgrp_childcnt == 0)
1114 return (lgrp_plat_latency(from_lgrp->lgrp_plathand,
1115 to_lgrp->lgrp_plathand));
1116
1117 /*
1118 * Determine max latency between resources in two lgroups
1119 */
1120 latency_max = 0;
1121 for (i = 0; i <= lgrp_alloc_max; i++) {
1122 lgrp_t *from_rsrc;
1123 int j;
1124 lgrp_t *to_rsrc;
1125
1126 from_rsrc = lgrp_table[i];
1127 if (!LGRP_EXISTS(from_rsrc) ||
1128 !klgrpset_ismember(from_lgrp->lgrp_set[LGRP_RSRC_CPU], i))
1129 continue;
1130
1131 for (j = 0; j <= lgrp_alloc_max; j++) {
1132 to_rsrc = lgrp_table[j];
1133 if (!LGRP_EXISTS(to_rsrc) ||
1134 klgrpset_ismember(to_lgrp->lgrp_set[LGRP_RSRC_MEM],
1135 j) == 0)
1136 continue;
1137 latency = lgrp_plat_latency(from_rsrc->lgrp_plathand,
1138 to_rsrc->lgrp_plathand);
1139 if (latency > latency_max)
1140 latency_max = latency;
1141 }
1142 }
1143 return (latency_max);
1144 }
1145
1146
1147 /*
1148 * Return lgroup interface version number
1149 * 0 - none
1150 * 1 - original
1151 * 2 - lgrp_latency_cookie() and lgrp_resources() added
1152 */
1153 int
1154 lgrp_version(int version)
1155 {
1156 /*
1157 * Return LGRP_VER_NONE when requested version isn't supported
1158 */
1159 if (version < LGRP_VER_NONE || version > LGRP_VER_CURRENT)
1160 return (LGRP_VER_NONE);
1161
1162 /*
1163 * Return current version when LGRP_VER_NONE passed in
1164 */
1165 if (version == LGRP_VER_NONE)
1166 return (LGRP_VER_CURRENT);
1167
1168 /*
1169 * Otherwise, return supported version.
1170 */
1171 return (version);
1172 }
1173
1174
1175 /*
1176 * Snapshot of lgroup hieararchy
1177 *
1178 * One snapshot is kept and is based on the kernel's native data model, so
1179 * a 32-bit snapshot is kept for the 32-bit kernel and a 64-bit one for the
1180 * 64-bit kernel. If a 32-bit user wants a snapshot from the 64-bit kernel,
1181 * the kernel generates a 32-bit snapshot from the data in its 64-bit snapshot.
1182 *
1183 * The format is defined by lgroup snapshot header and the layout of
1184 * the snapshot in memory is as follows:
1185 * 1) lgroup snapshot header
1186 * - specifies format of snapshot
1187 * - defined by lgrp_snapshot_header_t
1188 * 2) lgroup info array
1189 * - contains information about each lgroup
1190 * - one element for each lgroup
1191 * - each element is defined by lgrp_info_t
1192 * 3) lgroup CPU ID array
1193 * - contains list (array) of CPU IDs for each lgroup
1194 * - lgrp_info_t points into array and specifies how many CPUs belong to
1195 * given lgroup
1196 * 4) lgroup parents array
1197 * - contains lgroup bitmask of parents for each lgroup
1198 * - bitmask is an array of unsigned longs and its size depends on nlgrpsmax
1199 * 5) lgroup children array
1200 * - contains lgroup bitmask of children for each lgroup
1201 * - bitmask is an array of unsigned longs and its size depends on nlgrpsmax
1202 * 6) lgroup resources array
1203 * - contains lgroup bitmask of resources for each lgroup
1204 * - bitmask is an array of unsigned longs and its size depends on nlgrpsmax
1205 * 7) lgroup latency table
1206 * - contains latency from each lgroup to each of other lgroups
1207 *
1208 * NOTE: Must use nlgrpsmax for per lgroup data structures because lgroups
1209 * may be sparsely allocated.
1210 */
1211 lgrp_snapshot_header_t *lgrp_snap = NULL; /* lgroup snapshot */
1212 static kmutex_t lgrp_snap_lock; /* snapshot lock */
1213
1214
1215 /*
1216 * Take a snapshot of lgroup hierarchy and return size of buffer
1217 * needed to hold snapshot
1218 */
1219 static int
1220 lgrp_snapshot(void)
1221 {
1222 size_t bitmask_size;
1223 size_t bitmasks_size;
1224 size_t bufsize;
1225 int cpu_index;
1226 size_t cpuids_size;
1227 int i;
1228 int j;
1229 size_t info_size;
1230 size_t lats_size;
1231 ulong_t *lgrp_children;
1232 processorid_t *lgrp_cpuids;
1233 lgrp_info_t *lgrp_info;
1234 int **lgrp_lats;
1235 ulong_t *lgrp_parents;
1236 ulong_t *lgrp_rsets;
1237 ulong_t *lgrpset;
1238 int snap_ncpus;
1239 int snap_nlgrps;
1240 int snap_nlgrpsmax;
1241 size_t snap_hdr_size;
1242 #ifdef _SYSCALL32_IMPL
1243 model_t model = DATAMODEL_NATIVE;
1244
1245 /*
1246 * Have up-to-date snapshot, so check to see whether caller is 32-bit
1247 * program and need to return size of 32-bit snapshot now.
1248 */
1249 model = get_udatamodel();
1250 if (model == DATAMODEL_ILP32 && lgrp_snap &&
1251 lgrp_snap->ss_gen == lgrp_gen) {
1252
1253 snap_nlgrpsmax = lgrp_snap->ss_nlgrps_max;
1254
1255 /*
1256 * Calculate size of buffer needed for 32-bit snapshot,
1257 * rounding up size of each object to allow for alignment
1258 * of next object in buffer.
1259 */
1260 snap_hdr_size = P2ROUNDUP(sizeof (lgrp_snapshot_header32_t),
1261 sizeof (caddr32_t));
1262 info_size =
1263 P2ROUNDUP(snap_nlgrpsmax * sizeof (lgrp_info32_t),
1264 sizeof (processorid_t));
1265 cpuids_size =
1266 P2ROUNDUP(lgrp_snap->ss_ncpus * sizeof (processorid_t),
1267 sizeof (ulong_t));
1268
1269 /*
1270 * lgroup bitmasks needed for parents, children, and resources
1271 * for each lgroup and pset lgroup set
1272 */
1273 bitmask_size = BT_SIZEOFMAP(snap_nlgrpsmax);
1274 bitmasks_size = (((2 + LGRP_RSRC_COUNT) *
1275 snap_nlgrpsmax) + 1) * bitmask_size;
1276
1277 /*
1278 * Size of latency table and buffer
1279 */
1280 lats_size = snap_nlgrpsmax * sizeof (caddr32_t) +
1281 snap_nlgrpsmax * snap_nlgrpsmax * sizeof (int);
1282
1283 bufsize = snap_hdr_size + info_size + cpuids_size +
1284 bitmasks_size + lats_size;
1285 return (bufsize);
1286 }
1287 #endif /* _SYSCALL32_IMPL */
1288
1289 /*
1290 * Check whether snapshot is up-to-date
1291 * Free it and take another one if not
1292 */
1293 if (lgrp_snap) {
1294 if (lgrp_snap->ss_gen == lgrp_gen)
1295 return (lgrp_snap->ss_size);
1296
1297 kmem_free(lgrp_snap, lgrp_snap->ss_size);
1298 lgrp_snap = NULL;
1299 }
1300
1301 /*
1302 * Allocate memory for snapshot
1303 * w/o holding cpu_lock while waiting for memory
1304 */
1305 while (lgrp_snap == NULL) {
1306 int old_generation;
1307
1308 /*
1309 * Take snapshot of lgroup generation number
1310 * and configuration size dependent information
1311 * NOTE: Only count number of online CPUs,
1312 * since only online CPUs appear in lgroups.
1313 */
1314 mutex_enter(&cpu_lock);
1315 old_generation = lgrp_gen;
1316 snap_ncpus = ncpus_online;
1317 snap_nlgrps = nlgrps;
1318 snap_nlgrpsmax = nlgrpsmax;
1319 mutex_exit(&cpu_lock);
1320
1321 /*
1322 * Calculate size of buffer needed for snapshot,
1323 * rounding up size of each object to allow for alignment
1324 * of next object in buffer.
1325 */
1326 snap_hdr_size = P2ROUNDUP(sizeof (lgrp_snapshot_header_t),
1327 sizeof (void *));
1328 info_size = P2ROUNDUP(snap_nlgrpsmax * sizeof (lgrp_info_t),
1329 sizeof (processorid_t));
1330 cpuids_size = P2ROUNDUP(snap_ncpus * sizeof (processorid_t),
1331 sizeof (ulong_t));
1332 /*
1333 * lgroup bitmasks needed for pset lgroup set and parents,
1334 * children, and resource sets for each lgroup
1335 */
1336 bitmask_size = BT_SIZEOFMAP(snap_nlgrpsmax);
1337 bitmasks_size = (((2 + LGRP_RSRC_COUNT) *
1338 snap_nlgrpsmax) + 1) * bitmask_size;
1339
1340 /*
1341 * Size of latency table and buffer
1342 */
1343 lats_size = snap_nlgrpsmax * sizeof (int *) +
1344 snap_nlgrpsmax * snap_nlgrpsmax * sizeof (int);
1345
1346 bufsize = snap_hdr_size + info_size + cpuids_size +
1347 bitmasks_size + lats_size;
1348
1349 /*
1350 * Allocate memory for buffer
1351 */
1352 lgrp_snap = kmem_zalloc(bufsize, KM_NOSLEEP);
1353 if (lgrp_snap == NULL)
1354 return (set_errno(ENOMEM));
1355
1356 /*
1357 * Check whether generation number has changed
1358 */
1359 mutex_enter(&cpu_lock);
1360 if (lgrp_gen == old_generation)
1361 break; /* hasn't change, so done. */
1362
1363 /*
1364 * Generation number changed, so free memory and try again.
1365 */
1366 mutex_exit(&cpu_lock);
1367 kmem_free(lgrp_snap, bufsize);
1368 lgrp_snap = NULL;
1369 }
1370
1371 /*
1372 * Fill in lgroup snapshot header
1373 * (including pointers to tables of lgroup info, CPU IDs, and parents
1374 * and children)
1375 */
1376 lgrp_snap->ss_version = LGRP_VER_CURRENT;
1377
1378 /*
1379 * XXX For now, liblgrp only needs to know whether the hierarchy
1380 * XXX only has one level or not
1381 */
1382 if (snap_nlgrps == 1)
1383 lgrp_snap->ss_levels = 1;
1384 else
1385 lgrp_snap->ss_levels = 2;
1386
1387 lgrp_snap->ss_root = LGRP_ROOTID;
1388
1389 lgrp_snap->ss_nlgrps = lgrp_snap->ss_nlgrps_os = snap_nlgrps;
1390 lgrp_snap->ss_nlgrps_max = snap_nlgrpsmax;
1391 lgrp_snap->ss_ncpus = snap_ncpus;
1392 lgrp_snap->ss_gen = lgrp_gen;
1393 lgrp_snap->ss_view = LGRP_VIEW_OS;
1394 lgrp_snap->ss_pset = 0; /* NOTE: caller should set if needed */
1395 lgrp_snap->ss_size = bufsize;
1396 lgrp_snap->ss_magic = (uintptr_t)lgrp_snap;
1397
1398 lgrp_snap->ss_info = lgrp_info =
1399 (lgrp_info_t *)((uintptr_t)lgrp_snap + snap_hdr_size);
1400
1401 lgrp_snap->ss_cpuids = lgrp_cpuids =
1402 (processorid_t *)((uintptr_t)lgrp_info + info_size);
1403
1404 lgrp_snap->ss_lgrpset = lgrpset =
1405 (ulong_t *)((uintptr_t)lgrp_cpuids + cpuids_size);
1406
1407 lgrp_snap->ss_parents = lgrp_parents =
1408 (ulong_t *)((uintptr_t)lgrpset + bitmask_size);
1409
1410 lgrp_snap->ss_children = lgrp_children =
1411 (ulong_t *)((uintptr_t)lgrp_parents + (snap_nlgrpsmax *
1412 bitmask_size));
1413
1414 lgrp_snap->ss_rsets = lgrp_rsets =
1415 (ulong_t *)((uintptr_t)lgrp_children + (snap_nlgrpsmax *
1416 bitmask_size));
1417
1418 lgrp_snap->ss_latencies = lgrp_lats =
1419 (int **)((uintptr_t)lgrp_rsets + (LGRP_RSRC_COUNT *
1420 snap_nlgrpsmax * bitmask_size));
1421
1422 /*
1423 * Fill in lgroup information
1424 */
1425 cpu_index = 0;
1426 for (i = 0; i < snap_nlgrpsmax; i++) {
1427 struct cpu *cp;
1428 int cpu_count;
1429 struct cpu *head;
1430 int k;
1431 lgrp_t *lgrp;
1432
1433 lgrp = lgrp_table[i];
1434 if (!LGRP_EXISTS(lgrp)) {
1435 bzero(&lgrp_info[i], sizeof (lgrp_info[i]));
1436 lgrp_info[i].info_lgrpid = LGRP_NONE;
1437 continue;
1438 }
1439
1440 lgrp_info[i].info_lgrpid = i;
1441 lgrp_info[i].info_latency = lgrp->lgrp_latency;
1442
1443 /*
1444 * Fill in parents, children, and lgroup resources
1445 */
1446 lgrp_info[i].info_parents =
1447 (ulong_t *)((uintptr_t)lgrp_parents + (i * bitmask_size));
1448
1449 if (lgrp->lgrp_parent)
1450 BT_SET(lgrp_info[i].info_parents,
1451 lgrp->lgrp_parent->lgrp_id);
1452
1453 lgrp_info[i].info_children =
1454 (ulong_t *)((uintptr_t)lgrp_children + (i * bitmask_size));
1455
1456 for (j = 0; j < snap_nlgrpsmax; j++)
1457 if (klgrpset_ismember(lgrp->lgrp_children, j))
1458 BT_SET(lgrp_info[i].info_children, j);
1459
1460 lgrp_info[i].info_rset =
1461 (ulong_t *)((uintptr_t)lgrp_rsets +
1462 (i * LGRP_RSRC_COUNT * bitmask_size));
1463
1464 for (j = 0; j < LGRP_RSRC_COUNT; j++) {
1465 ulong_t *rset;
1466
1467 rset = (ulong_t *)((uintptr_t)lgrp_info[i].info_rset +
1468 (j * bitmask_size));
1469 for (k = 0; k < snap_nlgrpsmax; k++)
1470 if (klgrpset_ismember(lgrp->lgrp_set[j], k))
1471 BT_SET(rset, k);
1472 }
1473
1474 /*
1475 * Fill in CPU IDs
1476 */
1477 cpu_count = 0;
1478 lgrp_info[i].info_cpuids = NULL;
1479 cp = head = lgrp->lgrp_cpu;
1480 if (head != NULL) {
1481 lgrp_info[i].info_cpuids = &lgrp_cpuids[cpu_index];
1482 do {
1483 lgrp_cpuids[cpu_index] = cp->cpu_id;
1484 cpu_index++;
1485 cpu_count++;
1486 cp = cp->cpu_next_lgrp;
1487 } while (cp != head);
1488 }
1489 ASSERT(cpu_count == lgrp->lgrp_cpucnt);
1490 lgrp_info[i].info_ncpus = cpu_count;
1491
1492 /*
1493 * Fill in memory sizes for lgroups that directly contain
1494 * memory
1495 */
1496 if (klgrpset_ismember(lgrp->lgrp_set[LGRP_RSRC_MEM], i)) {
1497 lgrp_info[i].info_mem_free =
1498 lgrp_mem_size(i, LGRP_MEM_SIZE_FREE);
1499 lgrp_info[i].info_mem_install =
1500 lgrp_mem_size(i, LGRP_MEM_SIZE_INSTALL);
1501 }
1502
1503 /*
1504 * Fill in latency table and buffer
1505 */
1506 lgrp_lats[i] = (int *)((uintptr_t)lgrp_lats + snap_nlgrpsmax *
1507 sizeof (int *) + i * snap_nlgrpsmax * sizeof (int));
1508 for (j = 0; j < snap_nlgrpsmax; j++) {
1509 lgrp_t *to;
1510
1511 to = lgrp_table[j];
1512 if (!LGRP_EXISTS(to))
1513 continue;
1514 lgrp_lats[i][j] = lgrp_latency(lgrp->lgrp_id,
1515 to->lgrp_id);
1516 }
1517 }
1518 ASSERT(cpu_index == snap_ncpus);
1519
1520
1521 mutex_exit(&cpu_lock);
1522
1523 #ifdef _SYSCALL32_IMPL
1524 /*
1525 * Check to see whether caller is 32-bit program and need to return
1526 * size of 32-bit snapshot now that snapshot has been taken/updated.
1527 * May not have been able to do this earlier if snapshot was out of
1528 * date or didn't exist yet.
1529 */
1530 if (model == DATAMODEL_ILP32) {
1531
1532 snap_nlgrpsmax = lgrp_snap->ss_nlgrps_max;
1533
1534 /*
1535 * Calculate size of buffer needed for 32-bit snapshot,
1536 * rounding up size of each object to allow for alignment
1537 * of next object in buffer.
1538 */
1539 snap_hdr_size = P2ROUNDUP(sizeof (lgrp_snapshot_header32_t),
1540 sizeof (caddr32_t));
1541 info_size =
1542 P2ROUNDUP(snap_nlgrpsmax * sizeof (lgrp_info32_t),
1543 sizeof (processorid_t));
1544 cpuids_size =
1545 P2ROUNDUP(lgrp_snap->ss_ncpus * sizeof (processorid_t),
1546 sizeof (ulong_t));
1547
1548 bitmask_size = BT_SIZEOFMAP(snap_nlgrpsmax);
1549 bitmasks_size = (((2 + LGRP_RSRC_COUNT) * snap_nlgrpsmax) +
1550 1) * bitmask_size;
1551
1552
1553 /*
1554 * Size of latency table and buffer
1555 */
1556 lats_size = (snap_nlgrpsmax * sizeof (caddr32_t)) +
1557 (snap_nlgrpsmax * snap_nlgrpsmax * sizeof (int));
1558
1559 bufsize = snap_hdr_size + info_size + cpuids_size +
1560 bitmasks_size + lats_size;
1561 return (bufsize);
1562 }
1563 #endif /* _SYSCALL32_IMPL */
1564
1565 return (lgrp_snap->ss_size);
1566 }
1567
1568
1569 /*
1570 * Copy snapshot into given user buffer, fix up any pointers in buffer to point
1571 * into user instead of kernel address space, and return size of buffer
1572 * needed to hold snapshot
1573 */
1574 static int
1575 lgrp_snapshot_copy(char *buf, size_t bufsize)
1576 {
1577 size_t bitmask_size;
1578 int cpu_index;
1579 size_t cpuids_size;
1580 int i;
1581 size_t info_size;
1582 lgrp_info_t *lgrp_info;
1583 int retval;
1584 size_t snap_hdr_size;
1585 int snap_ncpus;
1586 int snap_nlgrpsmax;
1587 lgrp_snapshot_header_t *user_snap;
1588 lgrp_info_t *user_info;
1589 lgrp_info_t *user_info_buffer;
1590 processorid_t *user_cpuids;
1591 ulong_t *user_lgrpset;
1592 ulong_t *user_parents;
1593 ulong_t *user_children;
1594 int **user_lats;
1595 int **user_lats_buffer;
1596 ulong_t *user_rsets;
1597
1598 if (lgrp_snap == NULL)
1599 return (0);
1600
1601 if (buf == NULL || bufsize <= 0)
1602 return (lgrp_snap->ss_size);
1603
1604 /*
1605 * User needs to try getting size of buffer again
1606 * because given buffer size is too small.
1607 * The lgroup hierarchy may have changed after they asked for the size
1608 * but before the snapshot was taken.
1609 */
1610 if (bufsize < lgrp_snap->ss_size)
1611 return (set_errno(EAGAIN));
1612
1613 snap_ncpus = lgrp_snap->ss_ncpus;
1614 snap_nlgrpsmax = lgrp_snap->ss_nlgrps_max;
1615
1616 /*
1617 * Fill in lgrpset now because caller may have change psets
1618 */
1619 kpreempt_disable();
1620 for (i = 0; i < snap_nlgrpsmax; i++) {
1621 if (klgrpset_ismember(curthread->t_cpupart->cp_lgrpset,
1622 i)) {
1623 BT_SET(lgrp_snap->ss_lgrpset, i);
1624 }
1625 }
1626 kpreempt_enable();
1627
1628 /*
1629 * Copy lgroup snapshot (snapshot header, lgroup info, and CPU IDs)
1630 * into user buffer all at once
1631 */
1632 if (copyout(lgrp_snap, buf, lgrp_snap->ss_size) != 0)
1633 return (set_errno(EFAULT));
1634
1635 /*
1636 * Round up sizes of lgroup snapshot header and info for alignment
1637 */
1638 snap_hdr_size = P2ROUNDUP(sizeof (lgrp_snapshot_header_t),
1639 sizeof (void *));
1640 info_size = P2ROUNDUP(snap_nlgrpsmax * sizeof (lgrp_info_t),
1641 sizeof (processorid_t));
1642 cpuids_size = P2ROUNDUP(snap_ncpus * sizeof (processorid_t),
1643 sizeof (ulong_t));
1644
1645 bitmask_size = BT_SIZEOFMAP(snap_nlgrpsmax);
1646
1647 /*
1648 * Calculate pointers into user buffer for lgroup snapshot header,
1649 * info, and CPU IDs
1650 */
1651 user_snap = (lgrp_snapshot_header_t *)buf;
1652 user_info = (lgrp_info_t *)((uintptr_t)user_snap + snap_hdr_size);
1653 user_cpuids = (processorid_t *)((uintptr_t)user_info + info_size);
1654 user_lgrpset = (ulong_t *)((uintptr_t)user_cpuids + cpuids_size);
1655 user_parents = (ulong_t *)((uintptr_t)user_lgrpset + bitmask_size);
1656 user_children = (ulong_t *)((uintptr_t)user_parents +
1657 (snap_nlgrpsmax * bitmask_size));
1658 user_rsets = (ulong_t *)((uintptr_t)user_children +
1659 (snap_nlgrpsmax * bitmask_size));
1660 user_lats = (int **)((uintptr_t)user_rsets +
1661 (LGRP_RSRC_COUNT * snap_nlgrpsmax * bitmask_size));
1662
1663 /*
1664 * Copyout magic number (ie. pointer to beginning of buffer)
1665 */
1666 if (copyout(&buf, &user_snap->ss_magic, sizeof (buf)) != 0)
1667 return (set_errno(EFAULT));
1668
1669 /*
1670 * Fix up pointers in user buffer to point into user buffer
1671 * not kernel snapshot
1672 */
1673 if (copyout(&user_info, &user_snap->ss_info, sizeof (user_info)) != 0)
1674 return (set_errno(EFAULT));
1675
1676 if (copyout(&user_cpuids, &user_snap->ss_cpuids,
1677 sizeof (user_cpuids)) != 0)
1678 return (set_errno(EFAULT));
1679
1680 if (copyout(&user_lgrpset, &user_snap->ss_lgrpset,
1681 sizeof (user_lgrpset)) != 0)
1682 return (set_errno(EFAULT));
1683
1684 if (copyout(&user_parents, &user_snap->ss_parents,
1685 sizeof (user_parents)) != 0)
1686 return (set_errno(EFAULT));
1687
1688 if (copyout(&user_children, &user_snap->ss_children,
1689 sizeof (user_children)) != 0)
1690 return (set_errno(EFAULT));
1691
1692 if (copyout(&user_rsets, &user_snap->ss_rsets,
1693 sizeof (user_rsets)) != 0)
1694 return (set_errno(EFAULT));
1695
1696 if (copyout(&user_lats, &user_snap->ss_latencies,
1697 sizeof (user_lats)) != 0)
1698 return (set_errno(EFAULT));
1699
1700 /*
1701 * Make copies of lgroup info and latency table, fix up pointers,
1702 * and then copy them into user buffer
1703 */
1704 user_info_buffer = kmem_zalloc(info_size, KM_NOSLEEP);
1705 if (user_info_buffer == NULL)
1706 return (set_errno(ENOMEM));
1707
1708 user_lats_buffer = kmem_zalloc(snap_nlgrpsmax * sizeof (int *),
1709 KM_NOSLEEP);
1710 if (user_lats_buffer == NULL) {
1711 kmem_free(user_info_buffer, info_size);
1712 return (set_errno(ENOMEM));
1713 }
1714
1715 lgrp_info = (lgrp_info_t *)((uintptr_t)lgrp_snap + snap_hdr_size);
1716 bcopy(lgrp_info, user_info_buffer, info_size);
1717
1718 cpu_index = 0;
1719 for (i = 0; i < snap_nlgrpsmax; i++) {
1720 ulong_t *snap_rset;
1721
1722 /*
1723 * Skip non-existent lgroups
1724 */
1725 if (user_info_buffer[i].info_lgrpid == LGRP_NONE)
1726 continue;
1727
1728 /*
1729 * Update free memory size since it changes frequently
1730 * Only do so for lgroups directly containing memory
1731 *
1732 * NOTE: This must be done before changing the pointers to
1733 * point into user space since we need to dereference
1734 * lgroup resource set
1735 */
1736 snap_rset = &lgrp_info[i].info_rset[LGRP_RSRC_MEM *
1737 BT_BITOUL(snap_nlgrpsmax)];
1738 if (BT_TEST(snap_rset, i))
1739 user_info_buffer[i].info_mem_free =
1740 lgrp_mem_size(i, LGRP_MEM_SIZE_FREE);
1741
1742 /*
1743 * Fix up pointers to parents, children, resources, and
1744 * latencies
1745 */
1746 user_info_buffer[i].info_parents =
1747 (ulong_t *)((uintptr_t)user_parents + (i * bitmask_size));
1748 user_info_buffer[i].info_children =
1749 (ulong_t *)((uintptr_t)user_children + (i * bitmask_size));
1750 user_info_buffer[i].info_rset =
1751 (ulong_t *)((uintptr_t)user_rsets +
1752 (i * LGRP_RSRC_COUNT * bitmask_size));
1753 user_lats_buffer[i] = (int *)((uintptr_t)user_lats +
1754 (snap_nlgrpsmax * sizeof (int *)) + (i * snap_nlgrpsmax *
1755 sizeof (int)));
1756
1757 /*
1758 * Fix up pointer to CPU IDs
1759 */
1760 if (user_info_buffer[i].info_ncpus == 0) {
1761 user_info_buffer[i].info_cpuids = NULL;
1762 continue;
1763 }
1764 user_info_buffer[i].info_cpuids = &user_cpuids[cpu_index];
1765 cpu_index += user_info_buffer[i].info_ncpus;
1766 }
1767 ASSERT(cpu_index == snap_ncpus);
1768
1769 /*
1770 * Copy lgroup info and latency table with pointers fixed up to point
1771 * into user buffer out to user buffer now
1772 */
1773 retval = lgrp_snap->ss_size;
1774 if (copyout(user_info_buffer, user_info, info_size) != 0)
1775 retval = set_errno(EFAULT);
1776 kmem_free(user_info_buffer, info_size);
1777
1778 if (copyout(user_lats_buffer, user_lats, snap_nlgrpsmax *
1779 sizeof (int *)) != 0)
1780 retval = set_errno(EFAULT);
1781 kmem_free(user_lats_buffer, snap_nlgrpsmax * sizeof (int *));
1782
1783 return (retval);
1784 }
1785
1786
1787 #ifdef _SYSCALL32_IMPL
1788 /*
1789 * Make 32-bit copy of snapshot, fix up any pointers in buffer to point
1790 * into user instead of kernel address space, copy 32-bit snapshot into
1791 * given user buffer, and return size of buffer needed to hold snapshot
1792 */
1793 static int
1794 lgrp_snapshot_copy32(caddr32_t buf, size32_t bufsize)
1795 {
1796 size32_t bitmask_size;
1797 size32_t bitmasks_size;
1798 size32_t children_size;
1799 int cpu_index;
1800 size32_t cpuids_size;
1801 int i;
1802 int j;
1803 size32_t info_size;
1804 size32_t lats_size;
1805 lgrp_info_t *lgrp_info;
1806 lgrp_snapshot_header32_t *lgrp_snap32;
1807 lgrp_info32_t *lgrp_info32;
1808 processorid_t *lgrp_cpuids32;
1809 caddr32_t *lgrp_lats32;
1810 int **lgrp_lats32_kernel;
1811 uint_t *lgrp_set32;
1812 uint_t *lgrp_parents32;
1813 uint_t *lgrp_children32;
1814 uint_t *lgrp_rsets32;
1815 size32_t parents_size;
1816 size32_t rsets_size;
1817 size32_t set_size;
1818 size32_t snap_hdr_size;
1819 int snap_ncpus;
1820 int snap_nlgrpsmax;
1821 size32_t snap_size;
1822
1823 if (lgrp_snap == NULL)
1824 return (0);
1825
1826 snap_ncpus = lgrp_snap->ss_ncpus;
1827 snap_nlgrpsmax = lgrp_snap->ss_nlgrps_max;
1828
1829 /*
1830 * Calculate size of buffer needed for 32-bit snapshot,
1831 * rounding up size of each object to allow for alignment
1832 * of next object in buffer.
1833 */
1834 snap_hdr_size = P2ROUNDUP(sizeof (lgrp_snapshot_header32_t),
1835 sizeof (caddr32_t));
1836 info_size = P2ROUNDUP(snap_nlgrpsmax * sizeof (lgrp_info32_t),
1837 sizeof (processorid_t));
1838 cpuids_size = P2ROUNDUP(snap_ncpus * sizeof (processorid_t),
1839 sizeof (ulong_t));
1840
1841 bitmask_size = BT_SIZEOFMAP32(snap_nlgrpsmax);
1842
1843 set_size = bitmask_size;
1844 parents_size = snap_nlgrpsmax * bitmask_size;
1845 children_size = snap_nlgrpsmax * bitmask_size;
1846 rsets_size = P2ROUNDUP(LGRP_RSRC_COUNT * snap_nlgrpsmax *
1847 (int)bitmask_size, sizeof (caddr32_t));
1848
1849 bitmasks_size = set_size + parents_size + children_size + rsets_size;
1850
1851 /*
1852 * Size of latency table and buffer
1853 */
1854 lats_size = (snap_nlgrpsmax * sizeof (caddr32_t)) +
1855 (snap_nlgrpsmax * snap_nlgrpsmax * sizeof (int));
1856
1857 snap_size = snap_hdr_size + info_size + cpuids_size + bitmasks_size +
1858 lats_size;
1859
1860 if (buf == (uintptr_t)NULL || bufsize <= 0) {
1861 return (snap_size);
1862 }
1863
1864 /*
1865 * User needs to try getting size of buffer again
1866 * because given buffer size is too small.
1867 * The lgroup hierarchy may have changed after they asked for the size
1868 * but before the snapshot was taken.
1869 */
1870 if (bufsize < snap_size)
1871 return (set_errno(EAGAIN));
1872
1873 /*
1874 * Make 32-bit copy of snapshot, fix up pointers to point into user
1875 * buffer not kernel, and then copy whole thing into user buffer
1876 */
1877 lgrp_snap32 = kmem_zalloc(snap_size, KM_NOSLEEP);
1878 if (lgrp_snap32 == NULL)
1879 return (set_errno(ENOMEM));
1880
1881 /*
1882 * Calculate pointers into 32-bit copy of snapshot
1883 * for lgroup info, CPU IDs, pset lgroup bitmask, parents, children,
1884 * resources, and latency table and buffer
1885 */
1886 lgrp_info32 = (lgrp_info32_t *)((uintptr_t)lgrp_snap32 +
1887 snap_hdr_size);
1888 lgrp_cpuids32 = (processorid_t *)((uintptr_t)lgrp_info32 + info_size);
1889 lgrp_set32 = (uint_t *)((uintptr_t)lgrp_cpuids32 + cpuids_size);
1890 lgrp_parents32 = (uint_t *)((uintptr_t)lgrp_set32 + set_size);
1891 lgrp_children32 = (uint_t *)((uintptr_t)lgrp_parents32 + parents_size);
1892 lgrp_rsets32 = (uint_t *)((uintptr_t)lgrp_children32 + children_size);
1893 lgrp_lats32 = (caddr32_t *)((uintptr_t)lgrp_rsets32 + rsets_size);
1894
1895 /*
1896 * Make temporary lgroup latency table of pointers for kernel to use
1897 * to fill in rows of table with latencies from each lgroup
1898 */
1899 lgrp_lats32_kernel = kmem_zalloc(snap_nlgrpsmax * sizeof (int *),
1900 KM_NOSLEEP);
1901 if (lgrp_lats32_kernel == NULL) {
1902 kmem_free(lgrp_snap32, snap_size);
1903 return (set_errno(ENOMEM));
1904 }
1905
1906 /*
1907 * Fill in 32-bit lgroup snapshot header
1908 * (with pointers into user's buffer for lgroup info, CPU IDs,
1909 * bit masks, and latencies)
1910 */
1911 lgrp_snap32->ss_version = lgrp_snap->ss_version;
1912 lgrp_snap32->ss_levels = lgrp_snap->ss_levels;
1913 lgrp_snap32->ss_nlgrps = lgrp_snap32->ss_nlgrps_os =
1914 lgrp_snap->ss_nlgrps;
1915 lgrp_snap32->ss_nlgrps_max = snap_nlgrpsmax;
1916 lgrp_snap32->ss_root = lgrp_snap->ss_root;
1917 lgrp_snap32->ss_ncpus = lgrp_snap->ss_ncpus;
1918 lgrp_snap32->ss_gen = lgrp_snap->ss_gen;
1919 lgrp_snap32->ss_view = LGRP_VIEW_OS;
1920 lgrp_snap32->ss_size = snap_size;
1921 lgrp_snap32->ss_magic = buf;
1922 lgrp_snap32->ss_info = buf + snap_hdr_size;
1923 lgrp_snap32->ss_cpuids = lgrp_snap32->ss_info + info_size;
1924 lgrp_snap32->ss_lgrpset = lgrp_snap32->ss_cpuids + cpuids_size;
1925 lgrp_snap32->ss_parents = lgrp_snap32->ss_lgrpset + bitmask_size;
1926 lgrp_snap32->ss_children = lgrp_snap32->ss_parents +
1927 (snap_nlgrpsmax * bitmask_size);
1928 lgrp_snap32->ss_rsets = lgrp_snap32->ss_children +
1929 (snap_nlgrpsmax * bitmask_size);
1930 lgrp_snap32->ss_latencies = lgrp_snap32->ss_rsets +
1931 (LGRP_RSRC_COUNT * snap_nlgrpsmax * bitmask_size);
1932
1933 /*
1934 * Fill in lgrpset now because caller may have change psets
1935 */
1936 kpreempt_disable();
1937 for (i = 0; i < snap_nlgrpsmax; i++) {
1938 if (klgrpset_ismember(curthread->t_cpupart->cp_lgrpset,
1939 i)) {
1940 BT_SET32(lgrp_set32, i);
1941 }
1942 }
1943 kpreempt_enable();
1944
1945 /*
1946 * Fill in 32-bit copy of lgroup info and fix up pointers
1947 * to point into user's buffer instead of kernel's
1948 */
1949 cpu_index = 0;
1950 lgrp_info = lgrp_snap->ss_info;
1951 for (i = 0; i < snap_nlgrpsmax; i++) {
1952 uint_t *children;
1953 uint_t *lgrp_rset;
1954 uint_t *parents;
1955 ulong_t *snap_rset;
1956
1957 /*
1958 * Skip non-existent lgroups
1959 */
1960 if (lgrp_info[i].info_lgrpid == LGRP_NONE) {
1961 bzero(&lgrp_info32[i], sizeof (lgrp_info32[i]));
1962 lgrp_info32[i].info_lgrpid = LGRP_NONE;
1963 continue;
1964 }
1965
1966 /*
1967 * Fill in parents, children, lgroup resource set, and
1968 * latencies from snapshot
1969 */
1970 parents = (uint_t *)((uintptr_t)lgrp_parents32 +
1971 i * bitmask_size);
1972 children = (uint_t *)((uintptr_t)lgrp_children32 +
1973 i * bitmask_size);
1974 snap_rset = (ulong_t *)((uintptr_t)lgrp_snap->ss_rsets +
1975 (i * LGRP_RSRC_COUNT * BT_SIZEOFMAP(snap_nlgrpsmax)));
1976 lgrp_rset = (uint_t *)((uintptr_t)lgrp_rsets32 +
1977 (i * LGRP_RSRC_COUNT * bitmask_size));
1978 lgrp_lats32_kernel[i] = (int *)((uintptr_t)lgrp_lats32 +
1979 snap_nlgrpsmax * sizeof (caddr32_t) + i * snap_nlgrpsmax *
1980 sizeof (int));
1981 for (j = 0; j < snap_nlgrpsmax; j++) {
1982 int k;
1983 uint_t *rset;
1984
1985 if (BT_TEST(&lgrp_snap->ss_parents[i], j))
1986 BT_SET32(parents, j);
1987
1988 if (BT_TEST(&lgrp_snap->ss_children[i], j))
1989 BT_SET32(children, j);
1990
1991 for (k = 0; k < LGRP_RSRC_COUNT; k++) {
1992 rset = (uint_t *)((uintptr_t)lgrp_rset +
1993 k * bitmask_size);
1994 if (BT_TEST(&snap_rset[k], j))
1995 BT_SET32(rset, j);
1996 }
1997
1998 lgrp_lats32_kernel[i][j] =
1999 lgrp_snap->ss_latencies[i][j];
2000 }
2001
2002 /*
2003 * Fix up pointer to latency buffer
2004 */
2005 lgrp_lats32[i] = lgrp_snap32->ss_latencies +
2006 snap_nlgrpsmax * sizeof (caddr32_t) + i * snap_nlgrpsmax *
2007 sizeof (int);
2008
2009 /*
2010 * Fix up pointers for parents, children, and resources
2011 */
2012 lgrp_info32[i].info_parents = lgrp_snap32->ss_parents +
2013 (i * bitmask_size);
2014 lgrp_info32[i].info_children = lgrp_snap32->ss_children +
2015 (i * bitmask_size);
2016 lgrp_info32[i].info_rset = lgrp_snap32->ss_rsets +
2017 (i * LGRP_RSRC_COUNT * bitmask_size);
2018
2019 /*
2020 * Fill in memory and CPU info
2021 * Only fill in memory for lgroups directly containing memory
2022 */
2023 snap_rset = &lgrp_info[i].info_rset[LGRP_RSRC_MEM *
2024 BT_BITOUL(snap_nlgrpsmax)];
2025 if (BT_TEST(snap_rset, i)) {
2026 lgrp_info32[i].info_mem_free = lgrp_mem_size(i,
2027 LGRP_MEM_SIZE_FREE);
2028 lgrp_info32[i].info_mem_install =
2029 lgrp_info[i].info_mem_install;
2030 }
2031
2032 lgrp_info32[i].info_ncpus = lgrp_info[i].info_ncpus;
2033
2034 lgrp_info32[i].info_lgrpid = lgrp_info[i].info_lgrpid;
2035 lgrp_info32[i].info_latency = lgrp_info[i].info_latency;
2036
2037 if (lgrp_info32[i].info_ncpus == 0) {
2038 lgrp_info32[i].info_cpuids = 0;
2039 continue;
2040 }
2041
2042 /*
2043 * Fix up pointer for CPU IDs
2044 */
2045 lgrp_info32[i].info_cpuids = lgrp_snap32->ss_cpuids +
2046 (cpu_index * sizeof (processorid_t));
2047 cpu_index += lgrp_info32[i].info_ncpus;
2048 }
2049 ASSERT(cpu_index == snap_ncpus);
2050
2051 /*
2052 * Copy lgroup CPU IDs into 32-bit snapshot
2053 * before copying it out into user's buffer
2054 */
2055 bcopy(lgrp_snap->ss_cpuids, lgrp_cpuids32, cpuids_size);
2056
2057 /*
2058 * Copy 32-bit lgroup snapshot into user's buffer all at once
2059 */
2060 if (copyout(lgrp_snap32, (void *)(uintptr_t)buf, snap_size) != 0) {
2061 kmem_free(lgrp_snap32, snap_size);
2062 kmem_free(lgrp_lats32_kernel, snap_nlgrpsmax * sizeof (int *));
2063 return (set_errno(EFAULT));
2064 }
2065
2066 kmem_free(lgrp_snap32, snap_size);
2067 kmem_free(lgrp_lats32_kernel, snap_nlgrpsmax * sizeof (int *));
2068
2069 return (snap_size);
2070 }
2071 #endif /* _SYSCALL32_IMPL */
2072
2073
2074 int
2075 lgrpsys(int subcode, long ia, void *ap)
2076 {
2077 size_t bufsize;
2078 int latency;
2079
2080 switch (subcode) {
2081
2082 case LGRP_SYS_AFFINITY_GET:
2083 return (lgrp_affinity_get((lgrp_affinity_args_t *)ap));
2084
2085 case LGRP_SYS_AFFINITY_SET:
2086 return (lgrp_affinity_set((lgrp_affinity_args_t *)ap));
2087
2088 case LGRP_SYS_GENERATION:
2089 return (lgrp_generation(ia));
2090
2091 case LGRP_SYS_HOME:
2092 return (lgrp_home_get((idtype_t)ia, (id_t)(uintptr_t)ap));
2093
2094 case LGRP_SYS_LATENCY:
2095 mutex_enter(&cpu_lock);
2096 latency = lgrp_latency(ia, (lgrp_id_t)(uintptr_t)ap);
2097 mutex_exit(&cpu_lock);
2098 return (latency);
2099
2100 case LGRP_SYS_MEMINFO:
2101 return (meminfo(ia, (struct meminfo *)ap));
2102
2103 case LGRP_SYS_VERSION:
2104 return (lgrp_version(ia));
2105
2106 case LGRP_SYS_SNAPSHOT:
2107 mutex_enter(&lgrp_snap_lock);
2108 bufsize = lgrp_snapshot();
2109 if (ap && ia > 0) {
2110 if (get_udatamodel() == DATAMODEL_NATIVE)
2111 bufsize = lgrp_snapshot_copy(ap, ia);
2112 #ifdef _SYSCALL32_IMPL
2113 else
2114 bufsize = lgrp_snapshot_copy32(
2115 (caddr32_t)(uintptr_t)ap, ia);
2116 #endif /* _SYSCALL32_IMPL */
2117 }
2118 mutex_exit(&lgrp_snap_lock);
2119 return (bufsize);
2120
2121 default:
2122 break;
2123
2124 }
2125
2126 return (set_errno(EINVAL));
2127 }
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