1 /* 2 * Copyright IBM Corp. 2007,2012 3 * 4 * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>, 5 * Peter Oberparleiter <peter.oberparleiter@de.ibm.com> 6 */ 7 8 #define KMSG_COMPONENT "sclp_cmd" 9 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 10 11 #include <linux/completion.h> 12 #include <linux/init.h> 13 #include <linux/errno.h> 14 #include <linux/err.h> 15 #include <linux/export.h> 16 #include <linux/slab.h> 17 #include <linux/string.h> 18 #include <linux/mm.h> 19 #include <linux/mmzone.h> 20 #include <linux/memory.h> 21 #include <linux/module.h> 22 #include <linux/platform_device.h> 23 #include <asm/ctl_reg.h> 24 #include <asm/chpid.h> 25 #include <asm/setup.h> 26 #include <asm/page.h> 27 #include <asm/sclp.h> 28 29 #include "sclp.h" 30 31 static void sclp_sync_callback(struct sclp_req *req, void *data) 32 { 33 struct completion *completion = data; 34 35 complete(completion); 36 } 37 38 int sclp_sync_request(sclp_cmdw_t cmd, void *sccb) 39 { 40 return sclp_sync_request_timeout(cmd, sccb, 0); 41 } 42 43 int sclp_sync_request_timeout(sclp_cmdw_t cmd, void *sccb, int timeout) 44 { 45 struct completion completion; 46 struct sclp_req *request; 47 int rc; 48 49 request = kzalloc(sizeof(*request), GFP_KERNEL); 50 if (!request) 51 return -ENOMEM; 52 if (timeout) 53 request->queue_timeout = timeout; 54 request->command = cmd; 55 request->sccb = sccb; 56 request->status = SCLP_REQ_FILLED; 57 request->callback = sclp_sync_callback; 58 request->callback_data = &completion; 59 init_completion(&completion); 60 61 /* Perform sclp request. */ 62 rc = sclp_add_request(request); 63 if (rc) 64 goto out; 65 wait_for_completion(&completion); 66 67 /* Check response. */ 68 if (request->status != SCLP_REQ_DONE) { 69 pr_warning("sync request failed (cmd=0x%08x, " 70 "status=0x%02x)\n", cmd, request->status); 71 rc = -EIO; 72 } 73 out: 74 kfree(request); 75 return rc; 76 } 77 78 /* 79 * CPU configuration related functions. 80 */ 81 82 #define SCLP_CMDW_READ_CPU_INFO 0x00010001 83 #define SCLP_CMDW_CONFIGURE_CPU 0x00110001 84 #define SCLP_CMDW_DECONFIGURE_CPU 0x00100001 85 86 struct read_cpu_info_sccb { 87 struct sccb_header header; 88 u16 nr_configured; 89 u16 offset_configured; 90 u16 nr_standby; 91 u16 offset_standby; 92 u8 reserved[4096 - 16]; 93 } __attribute__((packed, aligned(PAGE_SIZE))); 94 95 static void sclp_fill_cpu_info(struct sclp_cpu_info *info, 96 struct read_cpu_info_sccb *sccb) 97 { 98 char *page = (char *) sccb; 99 100 memset(info, 0, sizeof(*info)); 101 info->configured = sccb->nr_configured; 102 info->standby = sccb->nr_standby; 103 info->combined = sccb->nr_configured + sccb->nr_standby; 104 info->has_cpu_type = sclp_fac84 & 0x1; 105 memcpy(&info->cpu, page + sccb->offset_configured, 106 info->combined * sizeof(struct sclp_cpu_entry)); 107 } 108 109 int sclp_get_cpu_info(struct sclp_cpu_info *info) 110 { 111 int rc; 112 struct read_cpu_info_sccb *sccb; 113 114 if (!SCLP_HAS_CPU_INFO) 115 return -EOPNOTSUPP; 116 sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); 117 if (!sccb) 118 return -ENOMEM; 119 sccb->header.length = sizeof(*sccb); 120 rc = sclp_sync_request_timeout(SCLP_CMDW_READ_CPU_INFO, sccb, 121 SCLP_QUEUE_INTERVAL); 122 if (rc) 123 goto out; 124 if (sccb->header.response_code != 0x0010) { 125 pr_warning("readcpuinfo failed (response=0x%04x)\n", 126 sccb->header.response_code); 127 rc = -EIO; 128 goto out; 129 } 130 sclp_fill_cpu_info(info, sccb); 131 out: 132 free_page((unsigned long) sccb); 133 return rc; 134 } 135 136 struct cpu_configure_sccb { 137 struct sccb_header header; 138 } __attribute__((packed, aligned(8))); 139 140 static int do_cpu_configure(sclp_cmdw_t cmd) 141 { 142 struct cpu_configure_sccb *sccb; 143 int rc; 144 145 if (!SCLP_HAS_CPU_RECONFIG) 146 return -EOPNOTSUPP; 147 /* 148 * This is not going to cross a page boundary since we force 149 * kmalloc to have a minimum alignment of 8 bytes on s390. 150 */ 151 sccb = kzalloc(sizeof(*sccb), GFP_KERNEL | GFP_DMA); 152 if (!sccb) 153 return -ENOMEM; 154 sccb->header.length = sizeof(*sccb); 155 rc = sclp_sync_request_timeout(cmd, sccb, SCLP_QUEUE_INTERVAL); 156 if (rc) 157 goto out; 158 switch (sccb->header.response_code) { 159 case 0x0020: 160 case 0x0120: 161 break; 162 default: 163 pr_warning("configure cpu failed (cmd=0x%08x, " 164 "response=0x%04x)\n", cmd, 165 sccb->header.response_code); 166 rc = -EIO; 167 break; 168 } 169 out: 170 kfree(sccb); 171 return rc; 172 } 173 174 int sclp_cpu_configure(u8 cpu) 175 { 176 return do_cpu_configure(SCLP_CMDW_CONFIGURE_CPU | cpu << 8); 177 } 178 179 int sclp_cpu_deconfigure(u8 cpu) 180 { 181 return do_cpu_configure(SCLP_CMDW_DECONFIGURE_CPU | cpu << 8); 182 } 183 184 #ifdef CONFIG_MEMORY_HOTPLUG 185 186 static DEFINE_MUTEX(sclp_mem_mutex); 187 static LIST_HEAD(sclp_mem_list); 188 static u8 sclp_max_storage_id; 189 static unsigned long sclp_storage_ids[256 / BITS_PER_LONG]; 190 static int sclp_mem_state_changed; 191 192 struct memory_increment { 193 struct list_head list; 194 u16 rn; 195 int standby; 196 }; 197 198 struct assign_storage_sccb { 199 struct sccb_header header; 200 u16 rn; 201 } __packed; 202 203 int arch_get_memory_phys_device(unsigned long start_pfn) 204 { 205 if (!sclp_rzm) 206 return 0; 207 return PFN_PHYS(start_pfn) >> ilog2(sclp_rzm); 208 } 209 210 static unsigned long long rn2addr(u16 rn) 211 { 212 return (unsigned long long) (rn - 1) * sclp_rzm; 213 } 214 215 static int do_assign_storage(sclp_cmdw_t cmd, u16 rn) 216 { 217 struct assign_storage_sccb *sccb; 218 int rc; 219 220 sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); 221 if (!sccb) 222 return -ENOMEM; 223 sccb->header.length = PAGE_SIZE; 224 sccb->rn = rn; 225 rc = sclp_sync_request_timeout(cmd, sccb, SCLP_QUEUE_INTERVAL); 226 if (rc) 227 goto out; 228 switch (sccb->header.response_code) { 229 case 0x0020: 230 case 0x0120: 231 break; 232 default: 233 pr_warning("assign storage failed (cmd=0x%08x, " 234 "response=0x%04x, rn=0x%04x)\n", cmd, 235 sccb->header.response_code, rn); 236 rc = -EIO; 237 break; 238 } 239 out: 240 free_page((unsigned long) sccb); 241 return rc; 242 } 243 244 static int sclp_assign_storage(u16 rn) 245 { 246 unsigned long long start; 247 int rc; 248 249 rc = do_assign_storage(0x000d0001, rn); 250 if (rc) 251 return rc; 252 start = rn2addr(rn); 253 storage_key_init_range(start, start + sclp_rzm); 254 return 0; 255 } 256 257 static int sclp_unassign_storage(u16 rn) 258 { 259 return do_assign_storage(0x000c0001, rn); 260 } 261 262 struct attach_storage_sccb { 263 struct sccb_header header; 264 u16 :16; 265 u16 assigned; 266 u32 :32; 267 u32 entries[0]; 268 } __packed; 269 270 static int sclp_attach_storage(u8 id) 271 { 272 struct attach_storage_sccb *sccb; 273 int rc; 274 int i; 275 276 sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); 277 if (!sccb) 278 return -ENOMEM; 279 sccb->header.length = PAGE_SIZE; 280 rc = sclp_sync_request_timeout(0x00080001 | id << 8, sccb, 281 SCLP_QUEUE_INTERVAL); 282 if (rc) 283 goto out; 284 switch (sccb->header.response_code) { 285 case 0x0020: 286 set_bit(id, sclp_storage_ids); 287 for (i = 0; i < sccb->assigned; i++) { 288 if (sccb->entries[i]) 289 sclp_unassign_storage(sccb->entries[i] >> 16); 290 } 291 break; 292 default: 293 rc = -EIO; 294 break; 295 } 296 out: 297 free_page((unsigned long) sccb); 298 return rc; 299 } 300 301 static int sclp_mem_change_state(unsigned long start, unsigned long size, 302 int online) 303 { 304 struct memory_increment *incr; 305 unsigned long long istart; 306 int rc = 0; 307 308 list_for_each_entry(incr, &sclp_mem_list, list) { 309 istart = rn2addr(incr->rn); 310 if (start + size - 1 < istart) 311 break; 312 if (start > istart + sclp_rzm - 1) 313 continue; 314 if (online) 315 rc |= sclp_assign_storage(incr->rn); 316 else 317 sclp_unassign_storage(incr->rn); 318 if (rc == 0) 319 incr->standby = online ? 0 : 1; 320 } 321 return rc ? -EIO : 0; 322 } 323 324 static bool contains_standby_increment(unsigned long start, unsigned long end) 325 { 326 struct memory_increment *incr; 327 unsigned long istart; 328 329 list_for_each_entry(incr, &sclp_mem_list, list) { 330 istart = rn2addr(incr->rn); 331 if (end - 1 < istart) 332 continue; 333 if (start > istart + sclp_rzm - 1) 334 continue; 335 if (incr->standby) 336 return true; 337 } 338 return false; 339 } 340 341 static int sclp_mem_notifier(struct notifier_block *nb, 342 unsigned long action, void *data) 343 { 344 unsigned long start, size; 345 struct memory_notify *arg; 346 unsigned char id; 347 int rc = 0; 348 349 arg = data; 350 start = arg->start_pfn << PAGE_SHIFT; 351 size = arg->nr_pages << PAGE_SHIFT; 352 mutex_lock(&sclp_mem_mutex); 353 for_each_clear_bit(id, sclp_storage_ids, sclp_max_storage_id + 1) 354 sclp_attach_storage(id); 355 switch (action) { 356 case MEM_GOING_OFFLINE: 357 /* 358 * We do not allow to set memory blocks offline that contain 359 * standby memory. This is done to simplify the "memory online" 360 * case. 361 */ 362 if (contains_standby_increment(start, start + size)) 363 rc = -EPERM; 364 break; 365 case MEM_ONLINE: 366 case MEM_CANCEL_OFFLINE: 367 break; 368 case MEM_GOING_ONLINE: 369 rc = sclp_mem_change_state(start, size, 1); 370 break; 371 case MEM_CANCEL_ONLINE: 372 sclp_mem_change_state(start, size, 0); 373 break; 374 case MEM_OFFLINE: 375 sclp_mem_change_state(start, size, 0); 376 break; 377 default: 378 rc = -EINVAL; 379 break; 380 } 381 if (!rc) 382 sclp_mem_state_changed = 1; 383 mutex_unlock(&sclp_mem_mutex); 384 return rc ? NOTIFY_BAD : NOTIFY_OK; 385 } 386 387 static struct notifier_block sclp_mem_nb = { 388 .notifier_call = sclp_mem_notifier, 389 }; 390 391 static void __init align_to_block_size(unsigned long long *start, 392 unsigned long long *size) 393 { 394 unsigned long long start_align, size_align, alignment; 395 396 alignment = memory_block_size_bytes(); 397 start_align = roundup(*start, alignment); 398 size_align = rounddown(*start + *size, alignment) - start_align; 399 400 pr_info("Standby memory at 0x%llx (%lluM of %lluM usable)\n", 401 *start, size_align >> 20, *size >> 20); 402 *start = start_align; 403 *size = size_align; 404 } 405 406 static void __init add_memory_merged(u16 rn) 407 { 408 static u16 first_rn, num; 409 unsigned long long start, size; 410 411 if (rn && first_rn && (first_rn + num == rn)) { 412 num++; 413 return; 414 } 415 if (!first_rn) 416 goto skip_add; 417 start = rn2addr(first_rn); 418 size = (unsigned long long) num * sclp_rzm; 419 if (start >= VMEM_MAX_PHYS) 420 goto skip_add; 421 if (start + size > VMEM_MAX_PHYS) 422 size = VMEM_MAX_PHYS - start; 423 if (memory_end_set && (start >= memory_end)) 424 goto skip_add; 425 if (memory_end_set && (start + size > memory_end)) 426 size = memory_end - start; 427 align_to_block_size(&start, &size); 428 if (size) 429 add_memory(0, start, size); 430 skip_add: 431 first_rn = rn; 432 num = 1; 433 } 434 435 static void __init sclp_add_standby_memory(void) 436 { 437 struct memory_increment *incr; 438 439 list_for_each_entry(incr, &sclp_mem_list, list) 440 if (incr->standby) 441 add_memory_merged(incr->rn); 442 add_memory_merged(0); 443 } 444 445 static void __init insert_increment(u16 rn, int standby, int assigned) 446 { 447 struct memory_increment *incr, *new_incr; 448 struct list_head *prev; 449 u16 last_rn; 450 451 new_incr = kzalloc(sizeof(*new_incr), GFP_KERNEL); 452 if (!new_incr) 453 return; 454 new_incr->rn = rn; 455 new_incr->standby = standby; 456 last_rn = 0; 457 prev = &sclp_mem_list; 458 list_for_each_entry(incr, &sclp_mem_list, list) { 459 if (assigned && incr->rn > rn) 460 break; 461 if (!assigned && incr->rn - last_rn > 1) 462 break; 463 last_rn = incr->rn; 464 prev = &incr->list; 465 } 466 if (!assigned) 467 new_incr->rn = last_rn + 1; 468 if (new_incr->rn > sclp_rnmax) { 469 kfree(new_incr); 470 return; 471 } 472 list_add(&new_incr->list, prev); 473 } 474 475 static int sclp_mem_freeze(struct device *dev) 476 { 477 if (!sclp_mem_state_changed) 478 return 0; 479 pr_err("Memory hotplug state changed, suspend refused.\n"); 480 return -EPERM; 481 } 482 483 struct read_storage_sccb { 484 struct sccb_header header; 485 u16 max_id; 486 u16 assigned; 487 u16 standby; 488 u16 :16; 489 u32 entries[0]; 490 } __packed; 491 492 static const struct dev_pm_ops sclp_mem_pm_ops = { 493 .freeze = sclp_mem_freeze, 494 }; 495 496 static struct platform_driver sclp_mem_pdrv = { 497 .driver = { 498 .name = "sclp_mem", 499 .pm = &sclp_mem_pm_ops, 500 }, 501 }; 502 503 static int __init sclp_detect_standby_memory(void) 504 { 505 struct platform_device *sclp_pdev; 506 struct read_storage_sccb *sccb; 507 int i, id, assigned, rc; 508 509 if (OLDMEM_BASE) /* No standby memory in kdump mode */ 510 return 0; 511 if ((sclp_facilities & 0xe00000000000ULL) != 0xe00000000000ULL) 512 return 0; 513 rc = -ENOMEM; 514 sccb = (void *) __get_free_page(GFP_KERNEL | GFP_DMA); 515 if (!sccb) 516 goto out; 517 assigned = 0; 518 for (id = 0; id <= sclp_max_storage_id; id++) { 519 memset(sccb, 0, PAGE_SIZE); 520 sccb->header.length = PAGE_SIZE; 521 rc = sclp_sync_request(0x00040001 | id << 8, sccb); 522 if (rc) 523 goto out; 524 switch (sccb->header.response_code) { 525 case 0x0010: 526 set_bit(id, sclp_storage_ids); 527 for (i = 0; i < sccb->assigned; i++) { 528 if (!sccb->entries[i]) 529 continue; 530 assigned++; 531 insert_increment(sccb->entries[i] >> 16, 0, 1); 532 } 533 break; 534 case 0x0310: 535 break; 536 case 0x0410: 537 for (i = 0; i < sccb->assigned; i++) { 538 if (!sccb->entries[i]) 539 continue; 540 assigned++; 541 insert_increment(sccb->entries[i] >> 16, 1, 1); 542 } 543 break; 544 default: 545 rc = -EIO; 546 break; 547 } 548 if (!rc) 549 sclp_max_storage_id = sccb->max_id; 550 } 551 if (rc || list_empty(&sclp_mem_list)) 552 goto out; 553 for (i = 1; i <= sclp_rnmax - assigned; i++) 554 insert_increment(0, 1, 0); 555 rc = register_memory_notifier(&sclp_mem_nb); 556 if (rc) 557 goto out; 558 rc = platform_driver_register(&sclp_mem_pdrv); 559 if (rc) 560 goto out; 561 sclp_pdev = platform_device_register_simple("sclp_mem", -1, NULL, 0); 562 rc = PTR_ERR_OR_ZERO(sclp_pdev); 563 if (rc) 564 goto out_driver; 565 sclp_add_standby_memory(); 566 goto out; 567 out_driver: 568 platform_driver_unregister(&sclp_mem_pdrv); 569 out: 570 free_page((unsigned long) sccb); 571 return rc; 572 } 573 __initcall(sclp_detect_standby_memory); 574 575 #endif /* CONFIG_MEMORY_HOTPLUG */ 576 577 /* 578 * PCI I/O adapter configuration related functions. 579 */ 580 #define SCLP_CMDW_CONFIGURE_PCI 0x001a0001 581 #define SCLP_CMDW_DECONFIGURE_PCI 0x001b0001 582 583 #define SCLP_RECONFIG_PCI_ATPYE 2 584 585 struct pci_cfg_sccb { 586 struct sccb_header header; 587 u8 atype; /* adapter type */ 588 u8 reserved1; 589 u16 reserved2; 590 u32 aid; /* adapter identifier */ 591 } __packed; 592 593 static int do_pci_configure(sclp_cmdw_t cmd, u32 fid) 594 { 595 struct pci_cfg_sccb *sccb; 596 int rc; 597 598 if (!SCLP_HAS_PCI_RECONFIG) 599 return -EOPNOTSUPP; 600 601 sccb = (struct pci_cfg_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA); 602 if (!sccb) 603 return -ENOMEM; 604 605 sccb->header.length = PAGE_SIZE; 606 sccb->atype = SCLP_RECONFIG_PCI_ATPYE; 607 sccb->aid = fid; 608 rc = sclp_sync_request(cmd, sccb); 609 if (rc) 610 goto out; 611 switch (sccb->header.response_code) { 612 case 0x0020: 613 case 0x0120: 614 break; 615 default: 616 pr_warn("configure PCI I/O adapter failed: cmd=0x%08x response=0x%04x\n", 617 cmd, sccb->header.response_code); 618 rc = -EIO; 619 break; 620 } 621 out: 622 free_page((unsigned long) sccb); 623 return rc; 624 } 625 626 int sclp_pci_configure(u32 fid) 627 { 628 return do_pci_configure(SCLP_CMDW_CONFIGURE_PCI, fid); 629 } 630 EXPORT_SYMBOL(sclp_pci_configure); 631 632 int sclp_pci_deconfigure(u32 fid) 633 { 634 return do_pci_configure(SCLP_CMDW_DECONFIGURE_PCI, fid); 635 } 636 EXPORT_SYMBOL(sclp_pci_deconfigure); 637 638 /* 639 * Channel path configuration related functions. 640 */ 641 642 #define SCLP_CMDW_CONFIGURE_CHPATH 0x000f0001 643 #define SCLP_CMDW_DECONFIGURE_CHPATH 0x000e0001 644 #define SCLP_CMDW_READ_CHPATH_INFORMATION 0x00030001 645 646 struct chp_cfg_sccb { 647 struct sccb_header header; 648 u8 ccm; 649 u8 reserved[6]; 650 u8 cssid; 651 } __attribute__((packed)); 652 653 static int do_chp_configure(sclp_cmdw_t cmd) 654 { 655 struct chp_cfg_sccb *sccb; 656 int rc; 657 658 if (!SCLP_HAS_CHP_RECONFIG) 659 return -EOPNOTSUPP; 660 /* Prepare sccb. */ 661 sccb = (struct chp_cfg_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA); 662 if (!sccb) 663 return -ENOMEM; 664 sccb->header.length = sizeof(*sccb); 665 rc = sclp_sync_request(cmd, sccb); 666 if (rc) 667 goto out; 668 switch (sccb->header.response_code) { 669 case 0x0020: 670 case 0x0120: 671 case 0x0440: 672 case 0x0450: 673 break; 674 default: 675 pr_warning("configure channel-path failed " 676 "(cmd=0x%08x, response=0x%04x)\n", cmd, 677 sccb->header.response_code); 678 rc = -EIO; 679 break; 680 } 681 out: 682 free_page((unsigned long) sccb); 683 return rc; 684 } 685 686 /** 687 * sclp_chp_configure - perform configure channel-path sclp command 688 * @chpid: channel-path ID 689 * 690 * Perform configure channel-path command sclp command for specified chpid. 691 * Return 0 after command successfully finished, non-zero otherwise. 692 */ 693 int sclp_chp_configure(struct chp_id chpid) 694 { 695 return do_chp_configure(SCLP_CMDW_CONFIGURE_CHPATH | chpid.id << 8); 696 } 697 698 /** 699 * sclp_chp_deconfigure - perform deconfigure channel-path sclp command 700 * @chpid: channel-path ID 701 * 702 * Perform deconfigure channel-path command sclp command for specified chpid 703 * and wait for completion. On success return 0. Return non-zero otherwise. 704 */ 705 int sclp_chp_deconfigure(struct chp_id chpid) 706 { 707 return do_chp_configure(SCLP_CMDW_DECONFIGURE_CHPATH | chpid.id << 8); 708 } 709 710 struct chp_info_sccb { 711 struct sccb_header header; 712 u8 recognized[SCLP_CHP_INFO_MASK_SIZE]; 713 u8 standby[SCLP_CHP_INFO_MASK_SIZE]; 714 u8 configured[SCLP_CHP_INFO_MASK_SIZE]; 715 u8 ccm; 716 u8 reserved[6]; 717 u8 cssid; 718 } __attribute__((packed)); 719 720 /** 721 * sclp_chp_read_info - perform read channel-path information sclp command 722 * @info: resulting channel-path information data 723 * 724 * Perform read channel-path information sclp command and wait for completion. 725 * On success, store channel-path information in @info and return 0. Return 726 * non-zero otherwise. 727 */ 728 int sclp_chp_read_info(struct sclp_chp_info *info) 729 { 730 struct chp_info_sccb *sccb; 731 int rc; 732 733 if (!SCLP_HAS_CHP_INFO) 734 return -EOPNOTSUPP; 735 /* Prepare sccb. */ 736 sccb = (struct chp_info_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA); 737 if (!sccb) 738 return -ENOMEM; 739 sccb->header.length = sizeof(*sccb); 740 rc = sclp_sync_request(SCLP_CMDW_READ_CHPATH_INFORMATION, sccb); 741 if (rc) 742 goto out; 743 if (sccb->header.response_code != 0x0010) { 744 pr_warning("read channel-path info failed " 745 "(response=0x%04x)\n", sccb->header.response_code); 746 rc = -EIO; 747 goto out; 748 } 749 memcpy(info->recognized, sccb->recognized, SCLP_CHP_INFO_MASK_SIZE); 750 memcpy(info->standby, sccb->standby, SCLP_CHP_INFO_MASK_SIZE); 751 memcpy(info->configured, sccb->configured, SCLP_CHP_INFO_MASK_SIZE); 752 out: 753 free_page((unsigned long) sccb); 754 return rc; 755 } 756 757 bool sclp_has_sprp(void) 758 { 759 return !!(sclp_fac84 & 0x2); 760 } 761