1 /* 2 * Copyright 2016,2017 IBM Corporation. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation; either version 7 * 2 of the License, or (at your option) any later version. 8 */ 9 10 #define pr_fmt(fmt) "xive: " fmt 11 12 #include <linux/types.h> 13 #include <linux/irq.h> 14 #include <linux/debugfs.h> 15 #include <linux/smp.h> 16 #include <linux/interrupt.h> 17 #include <linux/seq_file.h> 18 #include <linux/init.h> 19 #include <linux/of.h> 20 #include <linux/slab.h> 21 #include <linux/spinlock.h> 22 #include <linux/delay.h> 23 #include <linux/cpumask.h> 24 #include <linux/mm.h> 25 26 #include <asm/prom.h> 27 #include <asm/io.h> 28 #include <asm/smp.h> 29 #include <asm/irq.h> 30 #include <asm/errno.h> 31 #include <asm/xive.h> 32 #include <asm/xive-regs.h> 33 #include <asm/opal.h> 34 #include <asm/kvm_ppc.h> 35 36 #include "xive-internal.h" 37 38 39 static u32 xive_provision_size; 40 static u32 *xive_provision_chips; 41 static u32 xive_provision_chip_count; 42 static u32 xive_queue_shift; 43 static u32 xive_pool_vps = XIVE_INVALID_VP; 44 static struct kmem_cache *xive_provision_cache; 45 static bool xive_has_single_esc; 46 47 int xive_native_populate_irq_data(u32 hw_irq, struct xive_irq_data *data) 48 { 49 __be64 flags, eoi_page, trig_page; 50 __be32 esb_shift, src_chip; 51 u64 opal_flags; 52 s64 rc; 53 54 memset(data, 0, sizeof(*data)); 55 56 rc = opal_xive_get_irq_info(hw_irq, &flags, &eoi_page, &trig_page, 57 &esb_shift, &src_chip); 58 if (rc) { 59 pr_err("opal_xive_get_irq_info(0x%x) returned %lld\n", 60 hw_irq, rc); 61 return -EINVAL; 62 } 63 64 opal_flags = be64_to_cpu(flags); 65 if (opal_flags & OPAL_XIVE_IRQ_STORE_EOI) 66 data->flags |= XIVE_IRQ_FLAG_STORE_EOI; 67 if (opal_flags & OPAL_XIVE_IRQ_LSI) 68 data->flags |= XIVE_IRQ_FLAG_LSI; 69 if (opal_flags & OPAL_XIVE_IRQ_SHIFT_BUG) 70 data->flags |= XIVE_IRQ_FLAG_SHIFT_BUG; 71 if (opal_flags & OPAL_XIVE_IRQ_MASK_VIA_FW) 72 data->flags |= XIVE_IRQ_FLAG_MASK_FW; 73 if (opal_flags & OPAL_XIVE_IRQ_EOI_VIA_FW) 74 data->flags |= XIVE_IRQ_FLAG_EOI_FW; 75 data->eoi_page = be64_to_cpu(eoi_page); 76 data->trig_page = be64_to_cpu(trig_page); 77 data->esb_shift = be32_to_cpu(esb_shift); 78 data->src_chip = be32_to_cpu(src_chip); 79 80 data->eoi_mmio = ioremap(data->eoi_page, 1u << data->esb_shift); 81 if (!data->eoi_mmio) { 82 pr_err("Failed to map EOI page for irq 0x%x\n", hw_irq); 83 return -ENOMEM; 84 } 85 86 data->hw_irq = hw_irq; 87 88 if (!data->trig_page) 89 return 0; 90 if (data->trig_page == data->eoi_page) { 91 data->trig_mmio = data->eoi_mmio; 92 return 0; 93 } 94 95 data->trig_mmio = ioremap(data->trig_page, 1u << data->esb_shift); 96 if (!data->trig_mmio) { 97 pr_err("Failed to map trigger page for irq 0x%x\n", hw_irq); 98 return -ENOMEM; 99 } 100 return 0; 101 } 102 EXPORT_SYMBOL_GPL(xive_native_populate_irq_data); 103 104 int xive_native_configure_irq(u32 hw_irq, u32 target, u8 prio, u32 sw_irq) 105 { 106 s64 rc; 107 108 for (;;) { 109 rc = opal_xive_set_irq_config(hw_irq, target, prio, sw_irq); 110 if (rc != OPAL_BUSY) 111 break; 112 msleep(1); 113 } 114 return rc == 0 ? 0 : -ENXIO; 115 } 116 EXPORT_SYMBOL_GPL(xive_native_configure_irq); 117 118 119 /* This can be called multiple time to change a queue configuration */ 120 int xive_native_configure_queue(u32 vp_id, struct xive_q *q, u8 prio, 121 __be32 *qpage, u32 order, bool can_escalate) 122 { 123 s64 rc = 0; 124 __be64 qeoi_page_be; 125 __be32 esc_irq_be; 126 u64 flags, qpage_phys; 127 128 /* If there's an actual queue page, clean it */ 129 if (order) { 130 if (WARN_ON(!qpage)) 131 return -EINVAL; 132 qpage_phys = __pa(qpage); 133 } else 134 qpage_phys = 0; 135 136 /* Initialize the rest of the fields */ 137 q->msk = order ? ((1u << (order - 2)) - 1) : 0; 138 q->idx = 0; 139 q->toggle = 0; 140 141 rc = opal_xive_get_queue_info(vp_id, prio, NULL, NULL, 142 &qeoi_page_be, 143 &esc_irq_be, 144 NULL); 145 if (rc) { 146 pr_err("Error %lld getting queue info prio %d\n", rc, prio); 147 rc = -EIO; 148 goto fail; 149 } 150 q->eoi_phys = be64_to_cpu(qeoi_page_be); 151 152 /* Default flags */ 153 flags = OPAL_XIVE_EQ_ALWAYS_NOTIFY | OPAL_XIVE_EQ_ENABLED; 154 155 /* Escalation needed ? */ 156 if (can_escalate) { 157 q->esc_irq = be32_to_cpu(esc_irq_be); 158 flags |= OPAL_XIVE_EQ_ESCALATE; 159 } 160 161 /* Configure and enable the queue in HW */ 162 for (;;) { 163 rc = opal_xive_set_queue_info(vp_id, prio, qpage_phys, order, flags); 164 if (rc != OPAL_BUSY) 165 break; 166 msleep(1); 167 } 168 if (rc) { 169 pr_err("Error %lld setting queue for prio %d\n", rc, prio); 170 rc = -EIO; 171 } else { 172 /* 173 * KVM code requires all of the above to be visible before 174 * q->qpage is set due to how it manages IPI EOIs 175 */ 176 wmb(); 177 q->qpage = qpage; 178 } 179 fail: 180 return rc; 181 } 182 EXPORT_SYMBOL_GPL(xive_native_configure_queue); 183 184 static void __xive_native_disable_queue(u32 vp_id, struct xive_q *q, u8 prio) 185 { 186 s64 rc; 187 188 /* Disable the queue in HW */ 189 for (;;) { 190 rc = opal_xive_set_queue_info(vp_id, prio, 0, 0, 0); 191 if (rc != OPAL_BUSY) 192 break; 193 msleep(1); 194 } 195 if (rc) 196 pr_err("Error %lld disabling queue for prio %d\n", rc, prio); 197 } 198 199 void xive_native_disable_queue(u32 vp_id, struct xive_q *q, u8 prio) 200 { 201 __xive_native_disable_queue(vp_id, q, prio); 202 } 203 EXPORT_SYMBOL_GPL(xive_native_disable_queue); 204 205 static int xive_native_setup_queue(unsigned int cpu, struct xive_cpu *xc, u8 prio) 206 { 207 struct xive_q *q = &xc->queue[prio]; 208 __be32 *qpage; 209 210 qpage = xive_queue_page_alloc(cpu, xive_queue_shift); 211 if (IS_ERR(qpage)) 212 return PTR_ERR(qpage); 213 214 return xive_native_configure_queue(get_hard_smp_processor_id(cpu), 215 q, prio, qpage, xive_queue_shift, false); 216 } 217 218 static void xive_native_cleanup_queue(unsigned int cpu, struct xive_cpu *xc, u8 prio) 219 { 220 struct xive_q *q = &xc->queue[prio]; 221 unsigned int alloc_order; 222 223 /* 224 * We use the variant with no iounmap as this is called on exec 225 * from an IPI and iounmap isn't safe 226 */ 227 __xive_native_disable_queue(get_hard_smp_processor_id(cpu), q, prio); 228 alloc_order = xive_alloc_order(xive_queue_shift); 229 free_pages((unsigned long)q->qpage, alloc_order); 230 q->qpage = NULL; 231 } 232 233 static bool xive_native_match(struct device_node *node) 234 { 235 return of_device_is_compatible(node, "ibm,opal-xive-vc"); 236 } 237 238 #ifdef CONFIG_SMP 239 static int xive_native_get_ipi(unsigned int cpu, struct xive_cpu *xc) 240 { 241 struct device_node *np; 242 unsigned int chip_id; 243 s64 irq; 244 245 /* Find the chip ID */ 246 np = of_get_cpu_node(cpu, NULL); 247 if (np) { 248 if (of_property_read_u32(np, "ibm,chip-id", &chip_id) < 0) 249 chip_id = 0; 250 } 251 252 /* Allocate an IPI and populate info about it */ 253 for (;;) { 254 irq = opal_xive_allocate_irq(chip_id); 255 if (irq == OPAL_BUSY) { 256 msleep(1); 257 continue; 258 } 259 if (irq < 0) { 260 pr_err("Failed to allocate IPI on CPU %d\n", cpu); 261 return -ENXIO; 262 } 263 xc->hw_ipi = irq; 264 break; 265 } 266 return 0; 267 } 268 #endif /* CONFIG_SMP */ 269 270 u32 xive_native_alloc_irq(void) 271 { 272 s64 rc; 273 274 for (;;) { 275 rc = opal_xive_allocate_irq(OPAL_XIVE_ANY_CHIP); 276 if (rc != OPAL_BUSY) 277 break; 278 msleep(1); 279 } 280 if (rc < 0) 281 return 0; 282 return rc; 283 } 284 EXPORT_SYMBOL_GPL(xive_native_alloc_irq); 285 286 void xive_native_free_irq(u32 irq) 287 { 288 for (;;) { 289 s64 rc = opal_xive_free_irq(irq); 290 if (rc != OPAL_BUSY) 291 break; 292 msleep(1); 293 } 294 } 295 EXPORT_SYMBOL_GPL(xive_native_free_irq); 296 297 #ifdef CONFIG_SMP 298 static void xive_native_put_ipi(unsigned int cpu, struct xive_cpu *xc) 299 { 300 s64 rc; 301 302 /* Free the IPI */ 303 if (!xc->hw_ipi) 304 return; 305 for (;;) { 306 rc = opal_xive_free_irq(xc->hw_ipi); 307 if (rc == OPAL_BUSY) { 308 msleep(1); 309 continue; 310 } 311 xc->hw_ipi = 0; 312 break; 313 } 314 } 315 #endif /* CONFIG_SMP */ 316 317 static void xive_native_shutdown(void) 318 { 319 /* Switch the XIVE to emulation mode */ 320 opal_xive_reset(OPAL_XIVE_MODE_EMU); 321 } 322 323 /* 324 * Perform an "ack" cycle on the current thread, thus 325 * grabbing the pending active priorities and updating 326 * the CPPR to the most favored one. 327 */ 328 static void xive_native_update_pending(struct xive_cpu *xc) 329 { 330 u8 he, cppr; 331 u16 ack; 332 333 /* Perform the acknowledge hypervisor to register cycle */ 334 ack = be16_to_cpu(__raw_readw(xive_tima + TM_SPC_ACK_HV_REG)); 335 336 /* Synchronize subsequent queue accesses */ 337 mb(); 338 339 /* 340 * Grab the CPPR and the "HE" field which indicates the source 341 * of the hypervisor interrupt (if any) 342 */ 343 cppr = ack & 0xff; 344 he = GETFIELD(TM_QW3_NSR_HE, (ack >> 8)); 345 switch(he) { 346 case TM_QW3_NSR_HE_NONE: /* Nothing to see here */ 347 break; 348 case TM_QW3_NSR_HE_PHYS: /* Physical thread interrupt */ 349 if (cppr == 0xff) 350 return; 351 /* Mark the priority pending */ 352 xc->pending_prio |= 1 << cppr; 353 354 /* 355 * A new interrupt should never have a CPPR less favored 356 * than our current one. 357 */ 358 if (cppr >= xc->cppr) 359 pr_err("CPU %d odd ack CPPR, got %d at %d\n", 360 smp_processor_id(), cppr, xc->cppr); 361 362 /* Update our idea of what the CPPR is */ 363 xc->cppr = cppr; 364 break; 365 case TM_QW3_NSR_HE_POOL: /* HV Pool interrupt (unused) */ 366 case TM_QW3_NSR_HE_LSI: /* Legacy FW LSI (unused) */ 367 pr_err("CPU %d got unexpected interrupt type HE=%d\n", 368 smp_processor_id(), he); 369 return; 370 } 371 } 372 373 static void xive_native_eoi(u32 hw_irq) 374 { 375 /* 376 * Not normally used except if specific interrupts need 377 * a workaround on EOI. 378 */ 379 opal_int_eoi(hw_irq); 380 } 381 382 static void xive_native_setup_cpu(unsigned int cpu, struct xive_cpu *xc) 383 { 384 s64 rc; 385 u32 vp; 386 __be64 vp_cam_be; 387 u64 vp_cam; 388 389 if (xive_pool_vps == XIVE_INVALID_VP) 390 return; 391 392 /* Enable the pool VP */ 393 vp = xive_pool_vps + cpu; 394 pr_debug("CPU %d setting up pool VP 0x%x\n", cpu, vp); 395 for (;;) { 396 rc = opal_xive_set_vp_info(vp, OPAL_XIVE_VP_ENABLED, 0); 397 if (rc != OPAL_BUSY) 398 break; 399 msleep(1); 400 } 401 if (rc) { 402 pr_err("Failed to enable pool VP on CPU %d\n", cpu); 403 return; 404 } 405 406 /* Grab it's CAM value */ 407 rc = opal_xive_get_vp_info(vp, NULL, &vp_cam_be, NULL, NULL); 408 if (rc) { 409 pr_err("Failed to get pool VP info CPU %d\n", cpu); 410 return; 411 } 412 vp_cam = be64_to_cpu(vp_cam_be); 413 414 pr_debug("VP CAM = %llx\n", vp_cam); 415 416 /* Push it on the CPU (set LSMFB to 0xff to skip backlog scan) */ 417 pr_debug("(Old HW value: %08x)\n", 418 in_be32(xive_tima + TM_QW2_HV_POOL + TM_WORD2)); 419 out_be32(xive_tima + TM_QW2_HV_POOL + TM_WORD0, 0xff); 420 out_be32(xive_tima + TM_QW2_HV_POOL + TM_WORD2, 421 TM_QW2W2_VP | vp_cam); 422 pr_debug("(New HW value: %08x)\n", 423 in_be32(xive_tima + TM_QW2_HV_POOL + TM_WORD2)); 424 } 425 426 static void xive_native_teardown_cpu(unsigned int cpu, struct xive_cpu *xc) 427 { 428 s64 rc; 429 u32 vp; 430 431 if (xive_pool_vps == XIVE_INVALID_VP) 432 return; 433 434 /* Pull the pool VP from the CPU */ 435 in_be64(xive_tima + TM_SPC_PULL_POOL_CTX); 436 437 /* Disable it */ 438 vp = xive_pool_vps + cpu; 439 for (;;) { 440 rc = opal_xive_set_vp_info(vp, 0, 0); 441 if (rc != OPAL_BUSY) 442 break; 443 msleep(1); 444 } 445 } 446 447 void xive_native_sync_source(u32 hw_irq) 448 { 449 opal_xive_sync(XIVE_SYNC_EAS, hw_irq); 450 } 451 EXPORT_SYMBOL_GPL(xive_native_sync_source); 452 453 static const struct xive_ops xive_native_ops = { 454 .populate_irq_data = xive_native_populate_irq_data, 455 .configure_irq = xive_native_configure_irq, 456 .setup_queue = xive_native_setup_queue, 457 .cleanup_queue = xive_native_cleanup_queue, 458 .match = xive_native_match, 459 .shutdown = xive_native_shutdown, 460 .update_pending = xive_native_update_pending, 461 .eoi = xive_native_eoi, 462 .setup_cpu = xive_native_setup_cpu, 463 .teardown_cpu = xive_native_teardown_cpu, 464 .sync_source = xive_native_sync_source, 465 #ifdef CONFIG_SMP 466 .get_ipi = xive_native_get_ipi, 467 .put_ipi = xive_native_put_ipi, 468 #endif /* CONFIG_SMP */ 469 .name = "native", 470 }; 471 472 static bool xive_parse_provisioning(struct device_node *np) 473 { 474 int rc; 475 476 if (of_property_read_u32(np, "ibm,xive-provision-page-size", 477 &xive_provision_size) < 0) 478 return true; 479 rc = of_property_count_elems_of_size(np, "ibm,xive-provision-chips", 4); 480 if (rc < 0) { 481 pr_err("Error %d getting provision chips array\n", rc); 482 return false; 483 } 484 xive_provision_chip_count = rc; 485 if (rc == 0) 486 return true; 487 488 xive_provision_chips = kzalloc(4 * xive_provision_chip_count, 489 GFP_KERNEL); 490 if (WARN_ON(!xive_provision_chips)) 491 return false; 492 493 rc = of_property_read_u32_array(np, "ibm,xive-provision-chips", 494 xive_provision_chips, 495 xive_provision_chip_count); 496 if (rc < 0) { 497 pr_err("Error %d reading provision chips array\n", rc); 498 return false; 499 } 500 501 xive_provision_cache = kmem_cache_create("xive-provision", 502 xive_provision_size, 503 xive_provision_size, 504 0, NULL); 505 if (!xive_provision_cache) { 506 pr_err("Failed to allocate provision cache\n"); 507 return false; 508 } 509 return true; 510 } 511 512 static void xive_native_setup_pools(void) 513 { 514 /* Allocate a pool big enough */ 515 pr_debug("XIVE: Allocating VP block for pool size %u\n", nr_cpu_ids); 516 517 xive_pool_vps = xive_native_alloc_vp_block(nr_cpu_ids); 518 if (WARN_ON(xive_pool_vps == XIVE_INVALID_VP)) 519 pr_err("XIVE: Failed to allocate pool VP, KVM might not function\n"); 520 521 pr_debug("XIVE: Pool VPs allocated at 0x%x for %u max CPUs\n", 522 xive_pool_vps, nr_cpu_ids); 523 } 524 525 u32 xive_native_default_eq_shift(void) 526 { 527 return xive_queue_shift; 528 } 529 EXPORT_SYMBOL_GPL(xive_native_default_eq_shift); 530 531 bool __init xive_native_init(void) 532 { 533 struct device_node *np; 534 struct resource r; 535 void __iomem *tima; 536 struct property *prop; 537 u8 max_prio = 7; 538 const __be32 *p; 539 u32 val, cpu; 540 s64 rc; 541 542 if (xive_cmdline_disabled) 543 return false; 544 545 pr_devel("xive_native_init()\n"); 546 np = of_find_compatible_node(NULL, NULL, "ibm,opal-xive-pe"); 547 if (!np) { 548 pr_devel("not found !\n"); 549 return false; 550 } 551 pr_devel("Found %pOF\n", np); 552 553 /* Resource 1 is HV window */ 554 if (of_address_to_resource(np, 1, &r)) { 555 pr_err("Failed to get thread mgmnt area resource\n"); 556 return false; 557 } 558 tima = ioremap(r.start, resource_size(&r)); 559 if (!tima) { 560 pr_err("Failed to map thread mgmnt area\n"); 561 return false; 562 } 563 564 /* Read number of priorities */ 565 if (of_property_read_u32(np, "ibm,xive-#priorities", &val) == 0) 566 max_prio = val - 1; 567 568 /* Iterate the EQ sizes and pick one */ 569 of_property_for_each_u32(np, "ibm,xive-eq-sizes", prop, p, val) { 570 xive_queue_shift = val; 571 if (val == PAGE_SHIFT) 572 break; 573 } 574 575 /* Do we support single escalation */ 576 if (of_get_property(np, "single-escalation-support", NULL) != NULL) 577 xive_has_single_esc = true; 578 579 /* Configure Thread Management areas for KVM */ 580 for_each_possible_cpu(cpu) 581 kvmppc_set_xive_tima(cpu, r.start, tima); 582 583 /* Grab size of provisionning pages */ 584 xive_parse_provisioning(np); 585 586 /* Switch the XIVE to exploitation mode */ 587 rc = opal_xive_reset(OPAL_XIVE_MODE_EXPL); 588 if (rc) { 589 pr_err("Switch to exploitation mode failed with error %lld\n", rc); 590 return false; 591 } 592 593 /* Setup some dummy HV pool VPs */ 594 xive_native_setup_pools(); 595 596 /* Initialize XIVE core with our backend */ 597 if (!xive_core_init(&xive_native_ops, tima, TM_QW3_HV_PHYS, 598 max_prio)) { 599 opal_xive_reset(OPAL_XIVE_MODE_EMU); 600 return false; 601 } 602 pr_info("Using %dkB queues\n", 1 << (xive_queue_shift - 10)); 603 return true; 604 } 605 606 static bool xive_native_provision_pages(void) 607 { 608 u32 i; 609 void *p; 610 611 for (i = 0; i < xive_provision_chip_count; i++) { 612 u32 chip = xive_provision_chips[i]; 613 614 /* 615 * XXX TODO: Try to make the allocation local to the node where 616 * the chip resides. 617 */ 618 p = kmem_cache_alloc(xive_provision_cache, GFP_KERNEL); 619 if (!p) { 620 pr_err("Failed to allocate provisioning page\n"); 621 return false; 622 } 623 opal_xive_donate_page(chip, __pa(p)); 624 } 625 return true; 626 } 627 628 u32 xive_native_alloc_vp_block(u32 max_vcpus) 629 { 630 s64 rc; 631 u32 order; 632 633 order = fls(max_vcpus) - 1; 634 if (max_vcpus > (1 << order)) 635 order++; 636 637 pr_debug("VP block alloc, for max VCPUs %d use order %d\n", 638 max_vcpus, order); 639 640 for (;;) { 641 rc = opal_xive_alloc_vp_block(order); 642 switch (rc) { 643 case OPAL_BUSY: 644 msleep(1); 645 break; 646 case OPAL_XIVE_PROVISIONING: 647 if (!xive_native_provision_pages()) 648 return XIVE_INVALID_VP; 649 break; 650 default: 651 if (rc < 0) { 652 pr_err("OPAL failed to allocate VCPUs order %d, err %lld\n", 653 order, rc); 654 return XIVE_INVALID_VP; 655 } 656 return rc; 657 } 658 } 659 } 660 EXPORT_SYMBOL_GPL(xive_native_alloc_vp_block); 661 662 void xive_native_free_vp_block(u32 vp_base) 663 { 664 s64 rc; 665 666 if (vp_base == XIVE_INVALID_VP) 667 return; 668 669 rc = opal_xive_free_vp_block(vp_base); 670 if (rc < 0) 671 pr_warn("OPAL error %lld freeing VP block\n", rc); 672 } 673 EXPORT_SYMBOL_GPL(xive_native_free_vp_block); 674 675 int xive_native_enable_vp(u32 vp_id, bool single_escalation) 676 { 677 s64 rc; 678 u64 flags = OPAL_XIVE_VP_ENABLED; 679 680 if (single_escalation) 681 flags |= OPAL_XIVE_VP_SINGLE_ESCALATION; 682 for (;;) { 683 rc = opal_xive_set_vp_info(vp_id, flags, 0); 684 if (rc != OPAL_BUSY) 685 break; 686 msleep(1); 687 } 688 return rc ? -EIO : 0; 689 } 690 EXPORT_SYMBOL_GPL(xive_native_enable_vp); 691 692 int xive_native_disable_vp(u32 vp_id) 693 { 694 s64 rc; 695 696 for (;;) { 697 rc = opal_xive_set_vp_info(vp_id, 0, 0); 698 if (rc != OPAL_BUSY) 699 break; 700 msleep(1); 701 } 702 return rc ? -EIO : 0; 703 } 704 EXPORT_SYMBOL_GPL(xive_native_disable_vp); 705 706 int xive_native_get_vp_info(u32 vp_id, u32 *out_cam_id, u32 *out_chip_id) 707 { 708 __be64 vp_cam_be; 709 __be32 vp_chip_id_be; 710 s64 rc; 711 712 rc = opal_xive_get_vp_info(vp_id, NULL, &vp_cam_be, NULL, &vp_chip_id_be); 713 if (rc) 714 return -EIO; 715 *out_cam_id = be64_to_cpu(vp_cam_be) & 0xffffffffu; 716 *out_chip_id = be32_to_cpu(vp_chip_id_be); 717 718 return 0; 719 } 720 EXPORT_SYMBOL_GPL(xive_native_get_vp_info); 721 722 bool xive_native_has_single_escalation(void) 723 { 724 return xive_has_single_esc; 725 } 726 EXPORT_SYMBOL_GPL(xive_native_has_single_escalation); 727