1 /* 2 * QEMU PowerPC sPAPR XIVE interrupt controller model 3 * 4 * Copyright (c) 2017-2018, IBM Corporation. 5 * 6 * This code is licensed under the GPL version 2 or later. See the 7 * COPYING file in the top-level directory. 8 */ 9 10 #include "qemu/osdep.h" 11 #include "qemu/log.h" 12 #include "qemu/module.h" 13 #include "qapi/error.h" 14 #include "qemu/error-report.h" 15 #include "target/ppc/cpu.h" 16 #include "sysemu/cpus.h" 17 #include "sysemu/reset.h" 18 #include "migration/vmstate.h" 19 #include "monitor/monitor.h" 20 #include "hw/ppc/fdt.h" 21 #include "hw/ppc/spapr.h" 22 #include "hw/ppc/spapr_cpu_core.h" 23 #include "hw/ppc/spapr_xive.h" 24 #include "hw/ppc/xive.h" 25 #include "hw/ppc/xive_regs.h" 26 #include "hw/qdev-properties.h" 27 #include "trace.h" 28 29 /* 30 * XIVE Virtualization Controller BAR and Thread Management BAR that we 31 * use for the ESB pages and the TIMA pages 32 */ 33 #define SPAPR_XIVE_VC_BASE 0x0006010000000000ull 34 #define SPAPR_XIVE_TM_BASE 0x0006030203180000ull 35 36 /* 37 * The allocation of VP blocks is a complex operation in OPAL and the 38 * VP identifiers have a relation with the number of HW chips, the 39 * size of the VP blocks, VP grouping, etc. The QEMU sPAPR XIVE 40 * controller model does not have the same constraints and can use a 41 * simple mapping scheme of the CPU vcpu_id 42 * 43 * These identifiers are never returned to the OS. 44 */ 45 46 #define SPAPR_XIVE_NVT_BASE 0x400 47 48 /* 49 * sPAPR NVT and END indexing helpers 50 */ 51 static uint32_t spapr_xive_nvt_to_target(uint8_t nvt_blk, uint32_t nvt_idx) 52 { 53 return nvt_idx - SPAPR_XIVE_NVT_BASE; 54 } 55 56 static void spapr_xive_cpu_to_nvt(PowerPCCPU *cpu, 57 uint8_t *out_nvt_blk, uint32_t *out_nvt_idx) 58 { 59 assert(cpu); 60 61 if (out_nvt_blk) { 62 *out_nvt_blk = SPAPR_XIVE_BLOCK_ID; 63 } 64 65 if (out_nvt_blk) { 66 *out_nvt_idx = SPAPR_XIVE_NVT_BASE + cpu->vcpu_id; 67 } 68 } 69 70 static int spapr_xive_target_to_nvt(uint32_t target, 71 uint8_t *out_nvt_blk, uint32_t *out_nvt_idx) 72 { 73 PowerPCCPU *cpu = spapr_find_cpu(target); 74 75 if (!cpu) { 76 return -1; 77 } 78 79 spapr_xive_cpu_to_nvt(cpu, out_nvt_blk, out_nvt_idx); 80 return 0; 81 } 82 83 /* 84 * sPAPR END indexing uses a simple mapping of the CPU vcpu_id, 8 85 * priorities per CPU 86 */ 87 int spapr_xive_end_to_target(uint8_t end_blk, uint32_t end_idx, 88 uint32_t *out_server, uint8_t *out_prio) 89 { 90 91 assert(end_blk == SPAPR_XIVE_BLOCK_ID); 92 93 if (out_server) { 94 *out_server = end_idx >> 3; 95 } 96 97 if (out_prio) { 98 *out_prio = end_idx & 0x7; 99 } 100 return 0; 101 } 102 103 static void spapr_xive_cpu_to_end(PowerPCCPU *cpu, uint8_t prio, 104 uint8_t *out_end_blk, uint32_t *out_end_idx) 105 { 106 assert(cpu); 107 108 if (out_end_blk) { 109 *out_end_blk = SPAPR_XIVE_BLOCK_ID; 110 } 111 112 if (out_end_idx) { 113 *out_end_idx = (cpu->vcpu_id << 3) + prio; 114 } 115 } 116 117 static int spapr_xive_target_to_end(uint32_t target, uint8_t prio, 118 uint8_t *out_end_blk, uint32_t *out_end_idx) 119 { 120 PowerPCCPU *cpu = spapr_find_cpu(target); 121 122 if (!cpu) { 123 return -1; 124 } 125 126 spapr_xive_cpu_to_end(cpu, prio, out_end_blk, out_end_idx); 127 return 0; 128 } 129 130 /* 131 * On sPAPR machines, use a simplified output for the XIVE END 132 * structure dumping only the information related to the OS EQ. 133 */ 134 static void spapr_xive_end_pic_print_info(SpaprXive *xive, XiveEND *end, 135 Monitor *mon) 136 { 137 uint64_t qaddr_base = xive_end_qaddr(end); 138 uint32_t qindex = xive_get_field32(END_W1_PAGE_OFF, end->w1); 139 uint32_t qgen = xive_get_field32(END_W1_GENERATION, end->w1); 140 uint32_t qsize = xive_get_field32(END_W0_QSIZE, end->w0); 141 uint32_t qentries = 1 << (qsize + 10); 142 uint32_t nvt = xive_get_field32(END_W6_NVT_INDEX, end->w6); 143 uint8_t priority = xive_get_field32(END_W7_F0_PRIORITY, end->w7); 144 145 monitor_printf(mon, "%3d/%d % 6d/%5d @%"PRIx64" ^%d", 146 spapr_xive_nvt_to_target(0, nvt), 147 priority, qindex, qentries, qaddr_base, qgen); 148 149 xive_end_queue_pic_print_info(end, 6, mon); 150 } 151 152 /* 153 * kvm_irqchip_in_kernel() will cause the compiler to turn this 154 * info a nop if CONFIG_KVM isn't defined. 155 */ 156 #define spapr_xive_in_kernel(xive) \ 157 (kvm_irqchip_in_kernel() && (xive)->fd != -1) 158 159 static void spapr_xive_pic_print_info(SpaprXive *xive, Monitor *mon) 160 { 161 XiveSource *xsrc = &xive->source; 162 int i; 163 164 if (spapr_xive_in_kernel(xive)) { 165 Error *local_err = NULL; 166 167 kvmppc_xive_synchronize_state(xive, &local_err); 168 if (local_err) { 169 error_report_err(local_err); 170 return; 171 } 172 } 173 174 monitor_printf(mon, " LISN PQ EISN CPU/PRIO EQ\n"); 175 176 for (i = 0; i < xive->nr_irqs; i++) { 177 uint8_t pq = xive_source_esb_get(xsrc, i); 178 XiveEAS *eas = &xive->eat[i]; 179 180 if (!xive_eas_is_valid(eas)) { 181 continue; 182 } 183 184 monitor_printf(mon, " %08x %s %c%c%c %s %08x ", i, 185 xive_source_irq_is_lsi(xsrc, i) ? "LSI" : "MSI", 186 pq & XIVE_ESB_VAL_P ? 'P' : '-', 187 pq & XIVE_ESB_VAL_Q ? 'Q' : '-', 188 xive_source_is_asserted(xsrc, i) ? 'A' : ' ', 189 xive_eas_is_masked(eas) ? "M" : " ", 190 (int) xive_get_field64(EAS_END_DATA, eas->w)); 191 192 if (!xive_eas_is_masked(eas)) { 193 uint32_t end_idx = xive_get_field64(EAS_END_INDEX, eas->w); 194 XiveEND *end; 195 196 assert(end_idx < xive->nr_ends); 197 end = &xive->endt[end_idx]; 198 199 if (xive_end_is_valid(end)) { 200 spapr_xive_end_pic_print_info(xive, end, mon); 201 } 202 } 203 monitor_printf(mon, "\n"); 204 } 205 } 206 207 void spapr_xive_mmio_set_enabled(SpaprXive *xive, bool enable) 208 { 209 memory_region_set_enabled(&xive->source.esb_mmio, enable); 210 memory_region_set_enabled(&xive->tm_mmio, enable); 211 212 /* Disable the END ESBs until a guest OS makes use of them */ 213 memory_region_set_enabled(&xive->end_source.esb_mmio, false); 214 } 215 216 static void spapr_xive_tm_write(void *opaque, hwaddr offset, 217 uint64_t value, unsigned size) 218 { 219 XiveTCTX *tctx = spapr_cpu_state(POWERPC_CPU(current_cpu))->tctx; 220 221 xive_tctx_tm_write(XIVE_PRESENTER(opaque), tctx, offset, value, size); 222 } 223 224 static uint64_t spapr_xive_tm_read(void *opaque, hwaddr offset, unsigned size) 225 { 226 XiveTCTX *tctx = spapr_cpu_state(POWERPC_CPU(current_cpu))->tctx; 227 228 return xive_tctx_tm_read(XIVE_PRESENTER(opaque), tctx, offset, size); 229 } 230 231 const MemoryRegionOps spapr_xive_tm_ops = { 232 .read = spapr_xive_tm_read, 233 .write = spapr_xive_tm_write, 234 .endianness = DEVICE_BIG_ENDIAN, 235 .valid = { 236 .min_access_size = 1, 237 .max_access_size = 8, 238 }, 239 .impl = { 240 .min_access_size = 1, 241 .max_access_size = 8, 242 }, 243 }; 244 245 static void spapr_xive_end_reset(XiveEND *end) 246 { 247 memset(end, 0, sizeof(*end)); 248 249 /* switch off the escalation and notification ESBs */ 250 end->w1 = cpu_to_be32(END_W1_ESe_Q | END_W1_ESn_Q); 251 } 252 253 static void spapr_xive_reset(void *dev) 254 { 255 SpaprXive *xive = SPAPR_XIVE(dev); 256 int i; 257 258 /* 259 * The XiveSource has its own reset handler, which mask off all 260 * IRQs (!P|Q) 261 */ 262 263 /* Mask all valid EASs in the IRQ number space. */ 264 for (i = 0; i < xive->nr_irqs; i++) { 265 XiveEAS *eas = &xive->eat[i]; 266 if (xive_eas_is_valid(eas)) { 267 eas->w = cpu_to_be64(EAS_VALID | EAS_MASKED); 268 } else { 269 eas->w = 0; 270 } 271 } 272 273 /* Clear all ENDs */ 274 for (i = 0; i < xive->nr_ends; i++) { 275 spapr_xive_end_reset(&xive->endt[i]); 276 } 277 } 278 279 static void spapr_xive_instance_init(Object *obj) 280 { 281 SpaprXive *xive = SPAPR_XIVE(obj); 282 283 object_initialize_child(obj, "source", &xive->source, TYPE_XIVE_SOURCE); 284 285 object_initialize_child(obj, "end_source", &xive->end_source, 286 TYPE_XIVE_END_SOURCE); 287 288 /* Not connected to the KVM XIVE device */ 289 xive->fd = -1; 290 } 291 292 static void spapr_xive_realize(DeviceState *dev, Error **errp) 293 { 294 SpaprXive *xive = SPAPR_XIVE(dev); 295 SpaprXiveClass *sxc = SPAPR_XIVE_GET_CLASS(xive); 296 XiveSource *xsrc = &xive->source; 297 XiveENDSource *end_xsrc = &xive->end_source; 298 Error *local_err = NULL; 299 300 /* Set by spapr_irq_init() */ 301 g_assert(xive->nr_irqs); 302 g_assert(xive->nr_ends); 303 304 sxc->parent_realize(dev, &local_err); 305 if (local_err) { 306 error_propagate(errp, local_err); 307 return; 308 } 309 310 /* 311 * Initialize the internal sources, for IPIs and virtual devices. 312 */ 313 object_property_set_int(OBJECT(xsrc), "nr-irqs", xive->nr_irqs, 314 &error_fatal); 315 object_property_set_link(OBJECT(xsrc), "xive", OBJECT(xive), &error_abort); 316 if (!qdev_realize(DEVICE(xsrc), NULL, errp)) { 317 return; 318 } 319 320 /* 321 * Initialize the END ESB source 322 */ 323 object_property_set_int(OBJECT(end_xsrc), "nr-ends", xive->nr_irqs, 324 &error_fatal); 325 object_property_set_link(OBJECT(end_xsrc), "xive", OBJECT(xive), 326 &error_abort); 327 if (!qdev_realize(DEVICE(end_xsrc), NULL, errp)) { 328 return; 329 } 330 331 /* Set the mapping address of the END ESB pages after the source ESBs */ 332 xive->end_base = xive->vc_base + xive_source_esb_len(xsrc); 333 334 /* 335 * Allocate the routing tables 336 */ 337 xive->eat = g_new0(XiveEAS, xive->nr_irqs); 338 xive->endt = g_new0(XiveEND, xive->nr_ends); 339 340 xive->nodename = g_strdup_printf("interrupt-controller@%" PRIx64, 341 xive->tm_base + XIVE_TM_USER_PAGE * (1 << TM_SHIFT)); 342 343 qemu_register_reset(spapr_xive_reset, dev); 344 345 /* TIMA initialization */ 346 memory_region_init_io(&xive->tm_mmio, OBJECT(xive), &spapr_xive_tm_ops, 347 xive, "xive.tima", 4ull << TM_SHIFT); 348 349 /* 350 * Map all regions. These will be enabled or disabled at reset and 351 * can also be overridden by KVM memory regions if active 352 */ 353 memory_region_add_subregion(get_system_memory(), xive->vc_base, 354 &xsrc->esb_mmio); 355 memory_region_add_subregion(get_system_memory(), xive->end_base, 356 &end_xsrc->esb_mmio); 357 memory_region_add_subregion(get_system_memory(), xive->tm_base, 358 &xive->tm_mmio); 359 } 360 361 static int spapr_xive_get_eas(XiveRouter *xrtr, uint8_t eas_blk, 362 uint32_t eas_idx, XiveEAS *eas) 363 { 364 SpaprXive *xive = SPAPR_XIVE(xrtr); 365 366 if (eas_idx >= xive->nr_irqs) { 367 return -1; 368 } 369 370 *eas = xive->eat[eas_idx]; 371 return 0; 372 } 373 374 static int spapr_xive_get_end(XiveRouter *xrtr, 375 uint8_t end_blk, uint32_t end_idx, XiveEND *end) 376 { 377 SpaprXive *xive = SPAPR_XIVE(xrtr); 378 379 if (end_idx >= xive->nr_ends) { 380 return -1; 381 } 382 383 memcpy(end, &xive->endt[end_idx], sizeof(XiveEND)); 384 return 0; 385 } 386 387 static int spapr_xive_write_end(XiveRouter *xrtr, uint8_t end_blk, 388 uint32_t end_idx, XiveEND *end, 389 uint8_t word_number) 390 { 391 SpaprXive *xive = SPAPR_XIVE(xrtr); 392 393 if (end_idx >= xive->nr_ends) { 394 return -1; 395 } 396 397 memcpy(&xive->endt[end_idx], end, sizeof(XiveEND)); 398 return 0; 399 } 400 401 static int spapr_xive_get_nvt(XiveRouter *xrtr, 402 uint8_t nvt_blk, uint32_t nvt_idx, XiveNVT *nvt) 403 { 404 uint32_t vcpu_id = spapr_xive_nvt_to_target(nvt_blk, nvt_idx); 405 PowerPCCPU *cpu = spapr_find_cpu(vcpu_id); 406 407 if (!cpu) { 408 /* TODO: should we assert() if we can find a NVT ? */ 409 return -1; 410 } 411 412 /* 413 * sPAPR does not maintain a NVT table. Return that the NVT is 414 * valid if we have found a matching CPU 415 */ 416 nvt->w0 = cpu_to_be32(NVT_W0_VALID); 417 return 0; 418 } 419 420 static int spapr_xive_write_nvt(XiveRouter *xrtr, uint8_t nvt_blk, 421 uint32_t nvt_idx, XiveNVT *nvt, 422 uint8_t word_number) 423 { 424 /* 425 * We don't need to write back to the NVTs because the sPAPR 426 * machine should never hit a non-scheduled NVT. It should never 427 * get called. 428 */ 429 g_assert_not_reached(); 430 } 431 432 static int spapr_xive_match_nvt(XivePresenter *xptr, uint8_t format, 433 uint8_t nvt_blk, uint32_t nvt_idx, 434 bool cam_ignore, uint8_t priority, 435 uint32_t logic_serv, XiveTCTXMatch *match) 436 { 437 CPUState *cs; 438 int count = 0; 439 440 CPU_FOREACH(cs) { 441 PowerPCCPU *cpu = POWERPC_CPU(cs); 442 XiveTCTX *tctx = spapr_cpu_state(cpu)->tctx; 443 int ring; 444 445 /* 446 * Skip partially initialized vCPUs. This can happen when 447 * vCPUs are hotplugged. 448 */ 449 if (!tctx) { 450 continue; 451 } 452 453 /* 454 * Check the thread context CAM lines and record matches. 455 */ 456 ring = xive_presenter_tctx_match(xptr, tctx, format, nvt_blk, nvt_idx, 457 cam_ignore, logic_serv); 458 /* 459 * Save the matching thread interrupt context and follow on to 460 * check for duplicates which are invalid. 461 */ 462 if (ring != -1) { 463 if (match->tctx) { 464 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: already found a thread " 465 "context NVT %x/%x\n", nvt_blk, nvt_idx); 466 return -1; 467 } 468 469 match->ring = ring; 470 match->tctx = tctx; 471 count++; 472 } 473 } 474 475 return count; 476 } 477 478 static uint32_t spapr_xive_presenter_get_config(XivePresenter *xptr) 479 { 480 uint32_t cfg = 0; 481 482 /* 483 * Let's claim GEN1 TIMA format. If running with KVM on P10, the 484 * correct answer is deep in the hardware and not accessible to 485 * us. But it shouldn't matter as it only affects the presenter 486 * as seen by a guest OS. 487 */ 488 cfg |= XIVE_PRESENTER_GEN1_TIMA_OS; 489 490 return cfg; 491 } 492 493 static uint8_t spapr_xive_get_block_id(XiveRouter *xrtr) 494 { 495 return SPAPR_XIVE_BLOCK_ID; 496 } 497 498 static int spapr_xive_get_pq(XiveRouter *xrtr, uint8_t blk, uint32_t idx, 499 uint8_t *pq) 500 { 501 SpaprXive *xive = SPAPR_XIVE(xrtr); 502 503 assert(SPAPR_XIVE_BLOCK_ID == blk); 504 505 *pq = xive_source_esb_get(&xive->source, idx); 506 return 0; 507 } 508 509 static int spapr_xive_set_pq(XiveRouter *xrtr, uint8_t blk, uint32_t idx, 510 uint8_t *pq) 511 { 512 SpaprXive *xive = SPAPR_XIVE(xrtr); 513 514 assert(SPAPR_XIVE_BLOCK_ID == blk); 515 516 *pq = xive_source_esb_set(&xive->source, idx, *pq); 517 return 0; 518 } 519 520 521 static const VMStateDescription vmstate_spapr_xive_end = { 522 .name = TYPE_SPAPR_XIVE "/end", 523 .version_id = 1, 524 .minimum_version_id = 1, 525 .fields = (const VMStateField []) { 526 VMSTATE_UINT32(w0, XiveEND), 527 VMSTATE_UINT32(w1, XiveEND), 528 VMSTATE_UINT32(w2, XiveEND), 529 VMSTATE_UINT32(w3, XiveEND), 530 VMSTATE_UINT32(w4, XiveEND), 531 VMSTATE_UINT32(w5, XiveEND), 532 VMSTATE_UINT32(w6, XiveEND), 533 VMSTATE_UINT32(w7, XiveEND), 534 VMSTATE_END_OF_LIST() 535 }, 536 }; 537 538 static const VMStateDescription vmstate_spapr_xive_eas = { 539 .name = TYPE_SPAPR_XIVE "/eas", 540 .version_id = 1, 541 .minimum_version_id = 1, 542 .fields = (const VMStateField []) { 543 VMSTATE_UINT64(w, XiveEAS), 544 VMSTATE_END_OF_LIST() 545 }, 546 }; 547 548 static int vmstate_spapr_xive_pre_save(void *opaque) 549 { 550 SpaprXive *xive = SPAPR_XIVE(opaque); 551 552 if (spapr_xive_in_kernel(xive)) { 553 return kvmppc_xive_pre_save(xive); 554 } 555 556 return 0; 557 } 558 559 /* 560 * Called by the sPAPR IRQ backend 'post_load' method at the machine 561 * level. 562 */ 563 static int spapr_xive_post_load(SpaprInterruptController *intc, int version_id) 564 { 565 SpaprXive *xive = SPAPR_XIVE(intc); 566 567 if (spapr_xive_in_kernel(xive)) { 568 return kvmppc_xive_post_load(xive, version_id); 569 } 570 571 return 0; 572 } 573 574 static const VMStateDescription vmstate_spapr_xive = { 575 .name = TYPE_SPAPR_XIVE, 576 .version_id = 1, 577 .minimum_version_id = 1, 578 .pre_save = vmstate_spapr_xive_pre_save, 579 .post_load = NULL, /* handled at the machine level */ 580 .fields = (const VMStateField[]) { 581 VMSTATE_UINT32_EQUAL(nr_irqs, SpaprXive, NULL), 582 VMSTATE_STRUCT_VARRAY_POINTER_UINT32(eat, SpaprXive, nr_irqs, 583 vmstate_spapr_xive_eas, XiveEAS), 584 VMSTATE_STRUCT_VARRAY_POINTER_UINT32(endt, SpaprXive, nr_ends, 585 vmstate_spapr_xive_end, XiveEND), 586 VMSTATE_END_OF_LIST() 587 }, 588 }; 589 590 static int spapr_xive_claim_irq(SpaprInterruptController *intc, int lisn, 591 bool lsi, Error **errp) 592 { 593 SpaprXive *xive = SPAPR_XIVE(intc); 594 XiveSource *xsrc = &xive->source; 595 596 assert(lisn < xive->nr_irqs); 597 598 trace_spapr_xive_claim_irq(lisn, lsi); 599 600 if (xive_eas_is_valid(&xive->eat[lisn])) { 601 error_setg(errp, "IRQ %d is not free", lisn); 602 return -EBUSY; 603 } 604 605 /* 606 * Set default values when allocating an IRQ number 607 */ 608 xive->eat[lisn].w |= cpu_to_be64(EAS_VALID | EAS_MASKED); 609 if (lsi) { 610 xive_source_irq_set_lsi(xsrc, lisn); 611 } 612 613 if (spapr_xive_in_kernel(xive)) { 614 return kvmppc_xive_source_reset_one(xsrc, lisn, errp); 615 } 616 617 return 0; 618 } 619 620 static void spapr_xive_free_irq(SpaprInterruptController *intc, int lisn) 621 { 622 SpaprXive *xive = SPAPR_XIVE(intc); 623 assert(lisn < xive->nr_irqs); 624 625 trace_spapr_xive_free_irq(lisn); 626 627 xive->eat[lisn].w &= cpu_to_be64(~EAS_VALID); 628 } 629 630 static Property spapr_xive_properties[] = { 631 DEFINE_PROP_UINT32("nr-irqs", SpaprXive, nr_irqs, 0), 632 DEFINE_PROP_UINT32("nr-ends", SpaprXive, nr_ends, 0), 633 DEFINE_PROP_UINT64("vc-base", SpaprXive, vc_base, SPAPR_XIVE_VC_BASE), 634 DEFINE_PROP_UINT64("tm-base", SpaprXive, tm_base, SPAPR_XIVE_TM_BASE), 635 DEFINE_PROP_UINT8("hv-prio", SpaprXive, hv_prio, 7), 636 DEFINE_PROP_END_OF_LIST(), 637 }; 638 639 static int spapr_xive_cpu_intc_create(SpaprInterruptController *intc, 640 PowerPCCPU *cpu, Error **errp) 641 { 642 SpaprXive *xive = SPAPR_XIVE(intc); 643 Object *obj; 644 SpaprCpuState *spapr_cpu = spapr_cpu_state(cpu); 645 646 obj = xive_tctx_create(OBJECT(cpu), XIVE_PRESENTER(xive), errp); 647 if (!obj) { 648 return -1; 649 } 650 651 spapr_cpu->tctx = XIVE_TCTX(obj); 652 return 0; 653 } 654 655 static void xive_tctx_set_os_cam(XiveTCTX *tctx, uint32_t os_cam) 656 { 657 uint32_t qw1w2 = cpu_to_be32(TM_QW1W2_VO | os_cam); 658 memcpy(&tctx->regs[TM_QW1_OS + TM_WORD2], &qw1w2, 4); 659 } 660 661 static void spapr_xive_cpu_intc_reset(SpaprInterruptController *intc, 662 PowerPCCPU *cpu) 663 { 664 XiveTCTX *tctx = spapr_cpu_state(cpu)->tctx; 665 uint8_t nvt_blk; 666 uint32_t nvt_idx; 667 668 xive_tctx_reset(tctx); 669 670 /* 671 * When a Virtual Processor is scheduled to run on a HW thread, 672 * the hypervisor pushes its identifier in the OS CAM line. 673 * Emulate the same behavior under QEMU. 674 */ 675 spapr_xive_cpu_to_nvt(cpu, &nvt_blk, &nvt_idx); 676 677 xive_tctx_set_os_cam(tctx, xive_nvt_cam_line(nvt_blk, nvt_idx)); 678 } 679 680 static void spapr_xive_cpu_intc_destroy(SpaprInterruptController *intc, 681 PowerPCCPU *cpu) 682 { 683 SpaprCpuState *spapr_cpu = spapr_cpu_state(cpu); 684 685 xive_tctx_destroy(spapr_cpu->tctx); 686 spapr_cpu->tctx = NULL; 687 } 688 689 static void spapr_xive_set_irq(SpaprInterruptController *intc, int irq, int val) 690 { 691 SpaprXive *xive = SPAPR_XIVE(intc); 692 693 trace_spapr_xive_set_irq(irq, val); 694 695 if (spapr_xive_in_kernel(xive)) { 696 kvmppc_xive_source_set_irq(&xive->source, irq, val); 697 } else { 698 xive_source_set_irq(&xive->source, irq, val); 699 } 700 } 701 702 static void spapr_xive_print_info(SpaprInterruptController *intc, Monitor *mon) 703 { 704 SpaprXive *xive = SPAPR_XIVE(intc); 705 CPUState *cs; 706 707 CPU_FOREACH(cs) { 708 PowerPCCPU *cpu = POWERPC_CPU(cs); 709 710 xive_tctx_pic_print_info(spapr_cpu_state(cpu)->tctx, mon); 711 } 712 713 spapr_xive_pic_print_info(xive, mon); 714 } 715 716 static void spapr_xive_dt(SpaprInterruptController *intc, uint32_t nr_servers, 717 void *fdt, uint32_t phandle) 718 { 719 SpaprXive *xive = SPAPR_XIVE(intc); 720 int node; 721 uint64_t timas[2 * 2]; 722 /* Interrupt number ranges for the IPIs */ 723 uint32_t lisn_ranges[] = { 724 cpu_to_be32(SPAPR_IRQ_IPI), 725 cpu_to_be32(SPAPR_IRQ_IPI + nr_servers), 726 }; 727 /* 728 * EQ size - the sizes of pages supported by the system 4K, 64K, 729 * 2M, 16M. We only advertise 64K for the moment. 730 */ 731 uint32_t eq_sizes[] = { 732 cpu_to_be32(16), /* 64K */ 733 }; 734 /* 735 * QEMU/KVM only needs to define a single range to reserve the 736 * escalation priority. A priority bitmask would have been more 737 * appropriate. 738 */ 739 uint32_t plat_res_int_priorities[] = { 740 cpu_to_be32(xive->hv_prio), /* start */ 741 cpu_to_be32(0xff - xive->hv_prio), /* count */ 742 }; 743 744 /* Thread Interrupt Management Area : User (ring 3) and OS (ring 2) */ 745 timas[0] = cpu_to_be64(xive->tm_base + 746 XIVE_TM_USER_PAGE * (1ull << TM_SHIFT)); 747 timas[1] = cpu_to_be64(1ull << TM_SHIFT); 748 timas[2] = cpu_to_be64(xive->tm_base + 749 XIVE_TM_OS_PAGE * (1ull << TM_SHIFT)); 750 timas[3] = cpu_to_be64(1ull << TM_SHIFT); 751 752 _FDT(node = fdt_add_subnode(fdt, 0, xive->nodename)); 753 754 _FDT(fdt_setprop_string(fdt, node, "device_type", "power-ivpe")); 755 _FDT(fdt_setprop(fdt, node, "reg", timas, sizeof(timas))); 756 757 _FDT(fdt_setprop_string(fdt, node, "compatible", "ibm,power-ivpe")); 758 _FDT(fdt_setprop(fdt, node, "ibm,xive-eq-sizes", eq_sizes, 759 sizeof(eq_sizes))); 760 _FDT(fdt_setprop(fdt, node, "ibm,xive-lisn-ranges", lisn_ranges, 761 sizeof(lisn_ranges))); 762 763 /* For Linux to link the LSIs to the interrupt controller. */ 764 _FDT(fdt_setprop(fdt, node, "interrupt-controller", NULL, 0)); 765 _FDT(fdt_setprop_cell(fdt, node, "#interrupt-cells", 2)); 766 767 /* For SLOF */ 768 _FDT(fdt_setprop_cell(fdt, node, "linux,phandle", phandle)); 769 _FDT(fdt_setprop_cell(fdt, node, "phandle", phandle)); 770 771 /* 772 * The "ibm,plat-res-int-priorities" property defines the priority 773 * ranges reserved by the hypervisor 774 */ 775 _FDT(fdt_setprop(fdt, 0, "ibm,plat-res-int-priorities", 776 plat_res_int_priorities, sizeof(plat_res_int_priorities))); 777 } 778 779 static int spapr_xive_activate(SpaprInterruptController *intc, 780 uint32_t nr_servers, Error **errp) 781 { 782 SpaprXive *xive = SPAPR_XIVE(intc); 783 784 if (kvm_enabled()) { 785 int rc = spapr_irq_init_kvm(kvmppc_xive_connect, intc, nr_servers, 786 errp); 787 if (rc < 0) { 788 return rc; 789 } 790 } 791 792 /* Activate the XIVE MMIOs */ 793 spapr_xive_mmio_set_enabled(xive, true); 794 795 return 0; 796 } 797 798 static void spapr_xive_deactivate(SpaprInterruptController *intc) 799 { 800 SpaprXive *xive = SPAPR_XIVE(intc); 801 802 spapr_xive_mmio_set_enabled(xive, false); 803 804 if (spapr_xive_in_kernel(xive)) { 805 kvmppc_xive_disconnect(intc); 806 } 807 } 808 809 static bool spapr_xive_in_kernel_xptr(const XivePresenter *xptr) 810 { 811 return spapr_xive_in_kernel(SPAPR_XIVE(xptr)); 812 } 813 814 static void spapr_xive_class_init(ObjectClass *klass, void *data) 815 { 816 DeviceClass *dc = DEVICE_CLASS(klass); 817 XiveRouterClass *xrc = XIVE_ROUTER_CLASS(klass); 818 SpaprInterruptControllerClass *sicc = SPAPR_INTC_CLASS(klass); 819 XivePresenterClass *xpc = XIVE_PRESENTER_CLASS(klass); 820 SpaprXiveClass *sxc = SPAPR_XIVE_CLASS(klass); 821 822 dc->desc = "sPAPR XIVE Interrupt Controller"; 823 device_class_set_props(dc, spapr_xive_properties); 824 device_class_set_parent_realize(dc, spapr_xive_realize, 825 &sxc->parent_realize); 826 dc->vmsd = &vmstate_spapr_xive; 827 828 xrc->get_eas = spapr_xive_get_eas; 829 xrc->get_pq = spapr_xive_get_pq; 830 xrc->set_pq = spapr_xive_set_pq; 831 xrc->get_end = spapr_xive_get_end; 832 xrc->write_end = spapr_xive_write_end; 833 xrc->get_nvt = spapr_xive_get_nvt; 834 xrc->write_nvt = spapr_xive_write_nvt; 835 xrc->get_block_id = spapr_xive_get_block_id; 836 837 sicc->activate = spapr_xive_activate; 838 sicc->deactivate = spapr_xive_deactivate; 839 sicc->cpu_intc_create = spapr_xive_cpu_intc_create; 840 sicc->cpu_intc_reset = spapr_xive_cpu_intc_reset; 841 sicc->cpu_intc_destroy = spapr_xive_cpu_intc_destroy; 842 sicc->claim_irq = spapr_xive_claim_irq; 843 sicc->free_irq = spapr_xive_free_irq; 844 sicc->set_irq = spapr_xive_set_irq; 845 sicc->print_info = spapr_xive_print_info; 846 sicc->dt = spapr_xive_dt; 847 sicc->post_load = spapr_xive_post_load; 848 849 xpc->match_nvt = spapr_xive_match_nvt; 850 xpc->get_config = spapr_xive_presenter_get_config; 851 xpc->in_kernel = spapr_xive_in_kernel_xptr; 852 } 853 854 static const TypeInfo spapr_xive_info = { 855 .name = TYPE_SPAPR_XIVE, 856 .parent = TYPE_XIVE_ROUTER, 857 .instance_init = spapr_xive_instance_init, 858 .instance_size = sizeof(SpaprXive), 859 .class_init = spapr_xive_class_init, 860 .class_size = sizeof(SpaprXiveClass), 861 .interfaces = (InterfaceInfo[]) { 862 { TYPE_SPAPR_INTC }, 863 { } 864 }, 865 }; 866 867 static void spapr_xive_register_types(void) 868 { 869 type_register_static(&spapr_xive_info); 870 } 871 872 type_init(spapr_xive_register_types) 873 874 /* 875 * XIVE hcalls 876 * 877 * The terminology used by the XIVE hcalls is the following : 878 * 879 * TARGET vCPU number 880 * EQ Event Queue assigned by OS to receive event data 881 * ESB page for source interrupt management 882 * LISN Logical Interrupt Source Number identifying a source in the 883 * machine 884 * EISN Effective Interrupt Source Number used by guest OS to 885 * identify source in the guest 886 * 887 * The EAS, END, NVT structures are not exposed. 888 */ 889 890 /* 891 * On POWER9, the KVM XIVE device uses priority 7 for the escalation 892 * interrupts. So we only allow the guest to use priorities [0..6]. 893 */ 894 static bool spapr_xive_priority_is_reserved(SpaprXive *xive, uint8_t priority) 895 { 896 return priority >= xive->hv_prio; 897 } 898 899 /* 900 * The H_INT_GET_SOURCE_INFO hcall() is used to obtain the logical 901 * real address of the MMIO page through which the Event State Buffer 902 * entry associated with the value of the "lisn" parameter is managed. 903 * 904 * Parameters: 905 * Input 906 * - R4: "flags" 907 * Bits 0-63 reserved 908 * - R5: "lisn" is per "interrupts", "interrupt-map", or 909 * "ibm,xive-lisn-ranges" properties, or as returned by the 910 * ibm,query-interrupt-source-number RTAS call, or as returned 911 * by the H_ALLOCATE_VAS_WINDOW hcall 912 * 913 * Output 914 * - R4: "flags" 915 * Bits 0-59: Reserved 916 * Bit 60: H_INT_ESB must be used for Event State Buffer 917 * management 918 * Bit 61: 1 == LSI 0 == MSI 919 * Bit 62: the full function page supports trigger 920 * Bit 63: Store EOI Supported 921 * - R5: Logical Real address of full function Event State Buffer 922 * management page, -1 if H_INT_ESB hcall flag is set to 1. 923 * - R6: Logical Real Address of trigger only Event State Buffer 924 * management page or -1. 925 * - R7: Power of 2 page size for the ESB management pages returned in 926 * R5 and R6. 927 */ 928 929 #define SPAPR_XIVE_SRC_H_INT_ESB PPC_BIT(60) /* ESB manage with H_INT_ESB */ 930 #define SPAPR_XIVE_SRC_LSI PPC_BIT(61) /* Virtual LSI type */ 931 #define SPAPR_XIVE_SRC_TRIGGER PPC_BIT(62) /* Trigger and management 932 on same page */ 933 #define SPAPR_XIVE_SRC_STORE_EOI PPC_BIT(63) /* Store EOI support */ 934 935 static target_ulong h_int_get_source_info(PowerPCCPU *cpu, 936 SpaprMachineState *spapr, 937 target_ulong opcode, 938 target_ulong *args) 939 { 940 SpaprXive *xive = spapr->xive; 941 XiveSource *xsrc = &xive->source; 942 target_ulong flags = args[0]; 943 target_ulong lisn = args[1]; 944 945 trace_spapr_xive_get_source_info(flags, lisn); 946 947 if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) { 948 return H_FUNCTION; 949 } 950 951 if (flags) { 952 return H_PARAMETER; 953 } 954 955 if (lisn >= xive->nr_irqs) { 956 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Unknown LISN " TARGET_FMT_lx "\n", 957 lisn); 958 return H_P2; 959 } 960 961 if (!xive_eas_is_valid(&xive->eat[lisn])) { 962 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Invalid LISN " TARGET_FMT_lx "\n", 963 lisn); 964 return H_P2; 965 } 966 967 /* 968 * All sources are emulated under the main XIVE object and share 969 * the same characteristics. 970 */ 971 args[0] = 0; 972 if (!xive_source_esb_has_2page(xsrc)) { 973 args[0] |= SPAPR_XIVE_SRC_TRIGGER; 974 } 975 if (xsrc->esb_flags & XIVE_SRC_STORE_EOI) { 976 args[0] |= SPAPR_XIVE_SRC_STORE_EOI; 977 } 978 979 /* 980 * Force the use of the H_INT_ESB hcall in case of an LSI 981 * interrupt. This is necessary under KVM to re-trigger the 982 * interrupt if the level is still asserted 983 */ 984 if (xive_source_irq_is_lsi(xsrc, lisn)) { 985 args[0] |= SPAPR_XIVE_SRC_H_INT_ESB | SPAPR_XIVE_SRC_LSI; 986 } 987 988 if (!(args[0] & SPAPR_XIVE_SRC_H_INT_ESB)) { 989 args[1] = xive->vc_base + xive_source_esb_mgmt(xsrc, lisn); 990 } else { 991 args[1] = -1; 992 } 993 994 if (xive_source_esb_has_2page(xsrc) && 995 !(args[0] & SPAPR_XIVE_SRC_H_INT_ESB)) { 996 args[2] = xive->vc_base + xive_source_esb_page(xsrc, lisn); 997 } else { 998 args[2] = -1; 999 } 1000 1001 if (xive_source_esb_has_2page(xsrc)) { 1002 args[3] = xsrc->esb_shift - 1; 1003 } else { 1004 args[3] = xsrc->esb_shift; 1005 } 1006 1007 return H_SUCCESS; 1008 } 1009 1010 /* 1011 * The H_INT_SET_SOURCE_CONFIG hcall() is used to assign a Logical 1012 * Interrupt Source to a target. The Logical Interrupt Source is 1013 * designated with the "lisn" parameter and the target is designated 1014 * with the "target" and "priority" parameters. Upon return from the 1015 * hcall(), no additional interrupts will be directed to the old EQ. 1016 * 1017 * Parameters: 1018 * Input: 1019 * - R4: "flags" 1020 * Bits 0-61: Reserved 1021 * Bit 62: set the "eisn" in the EAS 1022 * Bit 63: masks the interrupt source in the hardware interrupt 1023 * control structure. An interrupt masked by this mechanism will 1024 * be dropped, but it's source state bits will still be 1025 * set. There is no race-free way of unmasking and restoring the 1026 * source. Thus this should only be used in interrupts that are 1027 * also masked at the source, and only in cases where the 1028 * interrupt is not meant to be used for a large amount of time 1029 * because no valid target exists for it for example 1030 * - R5: "lisn" is per "interrupts", "interrupt-map", or 1031 * "ibm,xive-lisn-ranges" properties, or as returned by the 1032 * ibm,query-interrupt-source-number RTAS call, or as returned by 1033 * the H_ALLOCATE_VAS_WINDOW hcall 1034 * - R6: "target" is per "ibm,ppc-interrupt-server#s" or 1035 * "ibm,ppc-interrupt-gserver#s" 1036 * - R7: "priority" is a valid priority not in 1037 * "ibm,plat-res-int-priorities" 1038 * - R8: "eisn" is the guest EISN associated with the "lisn" 1039 * 1040 * Output: 1041 * - None 1042 */ 1043 1044 #define SPAPR_XIVE_SRC_SET_EISN PPC_BIT(62) 1045 #define SPAPR_XIVE_SRC_MASK PPC_BIT(63) 1046 1047 static target_ulong h_int_set_source_config(PowerPCCPU *cpu, 1048 SpaprMachineState *spapr, 1049 target_ulong opcode, 1050 target_ulong *args) 1051 { 1052 SpaprXive *xive = spapr->xive; 1053 XiveEAS eas, new_eas; 1054 target_ulong flags = args[0]; 1055 target_ulong lisn = args[1]; 1056 target_ulong target = args[2]; 1057 target_ulong priority = args[3]; 1058 target_ulong eisn = args[4]; 1059 uint8_t end_blk; 1060 uint32_t end_idx; 1061 1062 trace_spapr_xive_set_source_config(flags, lisn, target, priority, eisn); 1063 1064 if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) { 1065 return H_FUNCTION; 1066 } 1067 1068 if (flags & ~(SPAPR_XIVE_SRC_SET_EISN | SPAPR_XIVE_SRC_MASK)) { 1069 return H_PARAMETER; 1070 } 1071 1072 if (lisn >= xive->nr_irqs) { 1073 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Unknown LISN " TARGET_FMT_lx "\n", 1074 lisn); 1075 return H_P2; 1076 } 1077 1078 eas = xive->eat[lisn]; 1079 if (!xive_eas_is_valid(&eas)) { 1080 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Invalid LISN " TARGET_FMT_lx "\n", 1081 lisn); 1082 return H_P2; 1083 } 1084 1085 /* priority 0xff is used to reset the EAS */ 1086 if (priority == 0xff) { 1087 new_eas.w = cpu_to_be64(EAS_VALID | EAS_MASKED); 1088 goto out; 1089 } 1090 1091 if (flags & SPAPR_XIVE_SRC_MASK) { 1092 new_eas.w = eas.w | cpu_to_be64(EAS_MASKED); 1093 } else { 1094 new_eas.w = eas.w & cpu_to_be64(~EAS_MASKED); 1095 } 1096 1097 if (spapr_xive_priority_is_reserved(xive, priority)) { 1098 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: priority " TARGET_FMT_ld 1099 " is reserved\n", priority); 1100 return H_P4; 1101 } 1102 1103 /* 1104 * Validate that "target" is part of the list of threads allocated 1105 * to the partition. For that, find the END corresponding to the 1106 * target. 1107 */ 1108 if (spapr_xive_target_to_end(target, priority, &end_blk, &end_idx)) { 1109 return H_P3; 1110 } 1111 1112 new_eas.w = xive_set_field64(EAS_END_BLOCK, new_eas.w, end_blk); 1113 new_eas.w = xive_set_field64(EAS_END_INDEX, new_eas.w, end_idx); 1114 1115 if (flags & SPAPR_XIVE_SRC_SET_EISN) { 1116 new_eas.w = xive_set_field64(EAS_END_DATA, new_eas.w, eisn); 1117 } 1118 1119 if (spapr_xive_in_kernel(xive)) { 1120 Error *local_err = NULL; 1121 1122 kvmppc_xive_set_source_config(xive, lisn, &new_eas, &local_err); 1123 if (local_err) { 1124 error_report_err(local_err); 1125 return H_HARDWARE; 1126 } 1127 } 1128 1129 out: 1130 xive->eat[lisn] = new_eas; 1131 return H_SUCCESS; 1132 } 1133 1134 /* 1135 * The H_INT_GET_SOURCE_CONFIG hcall() is used to determine to which 1136 * target/priority pair is assigned to the specified Logical Interrupt 1137 * Source. 1138 * 1139 * Parameters: 1140 * Input: 1141 * - R4: "flags" 1142 * Bits 0-63 Reserved 1143 * - R5: "lisn" is per "interrupts", "interrupt-map", or 1144 * "ibm,xive-lisn-ranges" properties, or as returned by the 1145 * ibm,query-interrupt-source-number RTAS call, or as 1146 * returned by the H_ALLOCATE_VAS_WINDOW hcall 1147 * 1148 * Output: 1149 * - R4: Target to which the specified Logical Interrupt Source is 1150 * assigned 1151 * - R5: Priority to which the specified Logical Interrupt Source is 1152 * assigned 1153 * - R6: EISN for the specified Logical Interrupt Source (this will be 1154 * equivalent to the LISN if not changed by H_INT_SET_SOURCE_CONFIG) 1155 */ 1156 static target_ulong h_int_get_source_config(PowerPCCPU *cpu, 1157 SpaprMachineState *spapr, 1158 target_ulong opcode, 1159 target_ulong *args) 1160 { 1161 SpaprXive *xive = spapr->xive; 1162 target_ulong flags = args[0]; 1163 target_ulong lisn = args[1]; 1164 XiveEAS eas; 1165 XiveEND *end; 1166 uint8_t nvt_blk; 1167 uint32_t end_idx, nvt_idx; 1168 1169 trace_spapr_xive_get_source_config(flags, lisn); 1170 1171 if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) { 1172 return H_FUNCTION; 1173 } 1174 1175 if (flags) { 1176 return H_PARAMETER; 1177 } 1178 1179 if (lisn >= xive->nr_irqs) { 1180 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Unknown LISN " TARGET_FMT_lx "\n", 1181 lisn); 1182 return H_P2; 1183 } 1184 1185 eas = xive->eat[lisn]; 1186 if (!xive_eas_is_valid(&eas)) { 1187 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Invalid LISN " TARGET_FMT_lx "\n", 1188 lisn); 1189 return H_P2; 1190 } 1191 1192 /* EAS_END_BLOCK is unused on sPAPR */ 1193 end_idx = xive_get_field64(EAS_END_INDEX, eas.w); 1194 1195 assert(end_idx < xive->nr_ends); 1196 end = &xive->endt[end_idx]; 1197 1198 nvt_blk = xive_get_field32(END_W6_NVT_BLOCK, end->w6); 1199 nvt_idx = xive_get_field32(END_W6_NVT_INDEX, end->w6); 1200 args[0] = spapr_xive_nvt_to_target(nvt_blk, nvt_idx); 1201 1202 if (xive_eas_is_masked(&eas)) { 1203 args[1] = 0xff; 1204 } else { 1205 args[1] = xive_get_field32(END_W7_F0_PRIORITY, end->w7); 1206 } 1207 1208 args[2] = xive_get_field64(EAS_END_DATA, eas.w); 1209 1210 return H_SUCCESS; 1211 } 1212 1213 /* 1214 * The H_INT_GET_QUEUE_INFO hcall() is used to get the logical real 1215 * address of the notification management page associated with the 1216 * specified target and priority. 1217 * 1218 * Parameters: 1219 * Input: 1220 * - R4: "flags" 1221 * Bits 0-63 Reserved 1222 * - R5: "target" is per "ibm,ppc-interrupt-server#s" or 1223 * "ibm,ppc-interrupt-gserver#s" 1224 * - R6: "priority" is a valid priority not in 1225 * "ibm,plat-res-int-priorities" 1226 * 1227 * Output: 1228 * - R4: Logical real address of notification page 1229 * - R5: Power of 2 page size of the notification page 1230 */ 1231 static target_ulong h_int_get_queue_info(PowerPCCPU *cpu, 1232 SpaprMachineState *spapr, 1233 target_ulong opcode, 1234 target_ulong *args) 1235 { 1236 SpaprXive *xive = spapr->xive; 1237 XiveENDSource *end_xsrc = &xive->end_source; 1238 target_ulong flags = args[0]; 1239 target_ulong target = args[1]; 1240 target_ulong priority = args[2]; 1241 XiveEND *end; 1242 uint8_t end_blk; 1243 uint32_t end_idx; 1244 1245 trace_spapr_xive_get_queue_info(flags, target, priority); 1246 1247 if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) { 1248 return H_FUNCTION; 1249 } 1250 1251 if (flags) { 1252 return H_PARAMETER; 1253 } 1254 1255 /* 1256 * H_STATE should be returned if a H_INT_RESET is in progress. 1257 * This is not needed when running the emulation under QEMU 1258 */ 1259 1260 if (spapr_xive_priority_is_reserved(xive, priority)) { 1261 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: priority " TARGET_FMT_ld 1262 " is reserved\n", priority); 1263 return H_P3; 1264 } 1265 1266 /* 1267 * Validate that "target" is part of the list of threads allocated 1268 * to the partition. For that, find the END corresponding to the 1269 * target. 1270 */ 1271 if (spapr_xive_target_to_end(target, priority, &end_blk, &end_idx)) { 1272 return H_P2; 1273 } 1274 1275 assert(end_idx < xive->nr_ends); 1276 end = &xive->endt[end_idx]; 1277 1278 args[0] = xive->end_base + (1ull << (end_xsrc->esb_shift + 1)) * end_idx; 1279 if (xive_end_is_enqueue(end)) { 1280 args[1] = xive_get_field32(END_W0_QSIZE, end->w0) + 12; 1281 } else { 1282 args[1] = 0; 1283 } 1284 1285 return H_SUCCESS; 1286 } 1287 1288 /* 1289 * The H_INT_SET_QUEUE_CONFIG hcall() is used to set or reset a EQ for 1290 * a given "target" and "priority". It is also used to set the 1291 * notification config associated with the EQ. An EQ size of 0 is 1292 * used to reset the EQ config for a given target and priority. If 1293 * resetting the EQ config, the END associated with the given "target" 1294 * and "priority" will be changed to disable queueing. 1295 * 1296 * Upon return from the hcall(), no additional interrupts will be 1297 * directed to the old EQ (if one was set). The old EQ (if one was 1298 * set) should be investigated for interrupts that occurred prior to 1299 * or during the hcall(). 1300 * 1301 * Parameters: 1302 * Input: 1303 * - R4: "flags" 1304 * Bits 0-62: Reserved 1305 * Bit 63: Unconditional Notify (n) per the XIVE spec 1306 * - R5: "target" is per "ibm,ppc-interrupt-server#s" or 1307 * "ibm,ppc-interrupt-gserver#s" 1308 * - R6: "priority" is a valid priority not in 1309 * "ibm,plat-res-int-priorities" 1310 * - R7: "eventQueue": The logical real address of the start of the EQ 1311 * - R8: "eventQueueSize": The power of 2 EQ size per "ibm,xive-eq-sizes" 1312 * 1313 * Output: 1314 * - None 1315 */ 1316 1317 #define SPAPR_XIVE_END_ALWAYS_NOTIFY PPC_BIT(63) 1318 1319 static target_ulong h_int_set_queue_config(PowerPCCPU *cpu, 1320 SpaprMachineState *spapr, 1321 target_ulong opcode, 1322 target_ulong *args) 1323 { 1324 SpaprXive *xive = spapr->xive; 1325 target_ulong flags = args[0]; 1326 target_ulong target = args[1]; 1327 target_ulong priority = args[2]; 1328 target_ulong qpage = args[3]; 1329 target_ulong qsize = args[4]; 1330 XiveEND end; 1331 uint8_t end_blk, nvt_blk; 1332 uint32_t end_idx, nvt_idx; 1333 1334 trace_spapr_xive_set_queue_config(flags, target, priority, qpage, qsize); 1335 1336 if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) { 1337 return H_FUNCTION; 1338 } 1339 1340 if (flags & ~SPAPR_XIVE_END_ALWAYS_NOTIFY) { 1341 return H_PARAMETER; 1342 } 1343 1344 /* 1345 * H_STATE should be returned if a H_INT_RESET is in progress. 1346 * This is not needed when running the emulation under QEMU 1347 */ 1348 1349 if (spapr_xive_priority_is_reserved(xive, priority)) { 1350 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: priority " TARGET_FMT_ld 1351 " is reserved\n", priority); 1352 return H_P3; 1353 } 1354 1355 /* 1356 * Validate that "target" is part of the list of threads allocated 1357 * to the partition. For that, find the END corresponding to the 1358 * target. 1359 */ 1360 1361 if (spapr_xive_target_to_end(target, priority, &end_blk, &end_idx)) { 1362 return H_P2; 1363 } 1364 1365 assert(end_idx < xive->nr_ends); 1366 memcpy(&end, &xive->endt[end_idx], sizeof(XiveEND)); 1367 1368 switch (qsize) { 1369 case 12: 1370 case 16: 1371 case 21: 1372 case 24: 1373 if (!QEMU_IS_ALIGNED(qpage, 1ul << qsize)) { 1374 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: EQ @0x%" HWADDR_PRIx 1375 " is not naturally aligned with %" HWADDR_PRIx "\n", 1376 qpage, (hwaddr)1 << qsize); 1377 return H_P4; 1378 } 1379 end.w2 = cpu_to_be32((qpage >> 32) & 0x0fffffff); 1380 end.w3 = cpu_to_be32(qpage & 0xffffffff); 1381 end.w0 |= cpu_to_be32(END_W0_ENQUEUE); 1382 end.w0 = xive_set_field32(END_W0_QSIZE, end.w0, qsize - 12); 1383 break; 1384 case 0: 1385 /* reset queue and disable queueing */ 1386 spapr_xive_end_reset(&end); 1387 goto out; 1388 1389 default: 1390 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: invalid EQ size %"PRIx64"\n", 1391 qsize); 1392 return H_P5; 1393 } 1394 1395 if (qsize) { 1396 hwaddr plen = 1 << qsize; 1397 void *eq; 1398 1399 /* 1400 * Validate the guest EQ. We should also check that the queue 1401 * has been zeroed by the OS. 1402 */ 1403 eq = address_space_map(CPU(cpu)->as, qpage, &plen, true, 1404 MEMTXATTRS_UNSPECIFIED); 1405 if (plen != 1 << qsize) { 1406 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: failed to map EQ @0x%" 1407 HWADDR_PRIx "\n", qpage); 1408 return H_P4; 1409 } 1410 address_space_unmap(CPU(cpu)->as, eq, plen, true, plen); 1411 } 1412 1413 /* "target" should have been validated above */ 1414 if (spapr_xive_target_to_nvt(target, &nvt_blk, &nvt_idx)) { 1415 g_assert_not_reached(); 1416 } 1417 1418 /* 1419 * Ensure the priority and target are correctly set (they will not 1420 * be right after allocation) 1421 */ 1422 end.w6 = xive_set_field32(END_W6_NVT_BLOCK, 0ul, nvt_blk) | 1423 xive_set_field32(END_W6_NVT_INDEX, 0ul, nvt_idx); 1424 end.w7 = xive_set_field32(END_W7_F0_PRIORITY, 0ul, priority); 1425 1426 if (flags & SPAPR_XIVE_END_ALWAYS_NOTIFY) { 1427 end.w0 |= cpu_to_be32(END_W0_UCOND_NOTIFY); 1428 } else { 1429 end.w0 &= cpu_to_be32((uint32_t)~END_W0_UCOND_NOTIFY); 1430 } 1431 1432 /* 1433 * The generation bit for the END starts at 1 and The END page 1434 * offset counter starts at 0. 1435 */ 1436 end.w1 = cpu_to_be32(END_W1_GENERATION) | 1437 xive_set_field32(END_W1_PAGE_OFF, 0ul, 0ul); 1438 end.w0 |= cpu_to_be32(END_W0_VALID); 1439 1440 /* 1441 * TODO: issue syncs required to ensure all in-flight interrupts 1442 * are complete on the old END 1443 */ 1444 1445 out: 1446 if (spapr_xive_in_kernel(xive)) { 1447 Error *local_err = NULL; 1448 1449 kvmppc_xive_set_queue_config(xive, end_blk, end_idx, &end, &local_err); 1450 if (local_err) { 1451 error_report_err(local_err); 1452 return H_HARDWARE; 1453 } 1454 } 1455 1456 /* Update END */ 1457 memcpy(&xive->endt[end_idx], &end, sizeof(XiveEND)); 1458 return H_SUCCESS; 1459 } 1460 1461 /* 1462 * The H_INT_GET_QUEUE_CONFIG hcall() is used to get a EQ for a given 1463 * target and priority. 1464 * 1465 * Parameters: 1466 * Input: 1467 * - R4: "flags" 1468 * Bits 0-62: Reserved 1469 * Bit 63: Debug: Return debug data 1470 * - R5: "target" is per "ibm,ppc-interrupt-server#s" or 1471 * "ibm,ppc-interrupt-gserver#s" 1472 * - R6: "priority" is a valid priority not in 1473 * "ibm,plat-res-int-priorities" 1474 * 1475 * Output: 1476 * - R4: "flags": 1477 * Bits 0-61: Reserved 1478 * Bit 62: The value of Event Queue Generation Number (g) per 1479 * the XIVE spec if "Debug" = 1 1480 * Bit 63: The value of Unconditional Notify (n) per the XIVE spec 1481 * - R5: The logical real address of the start of the EQ 1482 * - R6: The power of 2 EQ size per "ibm,xive-eq-sizes" 1483 * - R7: The value of Event Queue Offset Counter per XIVE spec 1484 * if "Debug" = 1, else 0 1485 * 1486 */ 1487 1488 #define SPAPR_XIVE_END_DEBUG PPC_BIT(63) 1489 1490 static target_ulong h_int_get_queue_config(PowerPCCPU *cpu, 1491 SpaprMachineState *spapr, 1492 target_ulong opcode, 1493 target_ulong *args) 1494 { 1495 SpaprXive *xive = spapr->xive; 1496 target_ulong flags = args[0]; 1497 target_ulong target = args[1]; 1498 target_ulong priority = args[2]; 1499 XiveEND *end; 1500 uint8_t end_blk; 1501 uint32_t end_idx; 1502 1503 trace_spapr_xive_get_queue_config(flags, target, priority); 1504 1505 if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) { 1506 return H_FUNCTION; 1507 } 1508 1509 if (flags & ~SPAPR_XIVE_END_DEBUG) { 1510 return H_PARAMETER; 1511 } 1512 1513 /* 1514 * H_STATE should be returned if a H_INT_RESET is in progress. 1515 * This is not needed when running the emulation under QEMU 1516 */ 1517 1518 if (spapr_xive_priority_is_reserved(xive, priority)) { 1519 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: priority " TARGET_FMT_ld 1520 " is reserved\n", priority); 1521 return H_P3; 1522 } 1523 1524 /* 1525 * Validate that "target" is part of the list of threads allocated 1526 * to the partition. For that, find the END corresponding to the 1527 * target. 1528 */ 1529 if (spapr_xive_target_to_end(target, priority, &end_blk, &end_idx)) { 1530 return H_P2; 1531 } 1532 1533 assert(end_idx < xive->nr_ends); 1534 end = &xive->endt[end_idx]; 1535 1536 args[0] = 0; 1537 if (xive_end_is_notify(end)) { 1538 args[0] |= SPAPR_XIVE_END_ALWAYS_NOTIFY; 1539 } 1540 1541 if (xive_end_is_enqueue(end)) { 1542 args[1] = xive_end_qaddr(end); 1543 args[2] = xive_get_field32(END_W0_QSIZE, end->w0) + 12; 1544 } else { 1545 args[1] = 0; 1546 args[2] = 0; 1547 } 1548 1549 if (spapr_xive_in_kernel(xive)) { 1550 Error *local_err = NULL; 1551 1552 kvmppc_xive_get_queue_config(xive, end_blk, end_idx, end, &local_err); 1553 if (local_err) { 1554 error_report_err(local_err); 1555 return H_HARDWARE; 1556 } 1557 } 1558 1559 /* TODO: do we need any locking on the END ? */ 1560 if (flags & SPAPR_XIVE_END_DEBUG) { 1561 /* Load the event queue generation number into the return flags */ 1562 args[0] |= (uint64_t)xive_get_field32(END_W1_GENERATION, end->w1) << 62; 1563 1564 /* Load R7 with the event queue offset counter */ 1565 args[3] = xive_get_field32(END_W1_PAGE_OFF, end->w1); 1566 } else { 1567 args[3] = 0; 1568 } 1569 1570 return H_SUCCESS; 1571 } 1572 1573 /* 1574 * The H_INT_SET_OS_REPORTING_LINE hcall() is used to set the 1575 * reporting cache line pair for the calling thread. The reporting 1576 * cache lines will contain the OS interrupt context when the OS 1577 * issues a CI store byte to @TIMA+0xC10 to acknowledge the OS 1578 * interrupt. The reporting cache lines can be reset by inputting -1 1579 * in "reportingLine". Issuing the CI store byte without reporting 1580 * cache lines registered will result in the data not being accessible 1581 * to the OS. 1582 * 1583 * Parameters: 1584 * Input: 1585 * - R4: "flags" 1586 * Bits 0-63: Reserved 1587 * - R5: "reportingLine": The logical real address of the reporting cache 1588 * line pair 1589 * 1590 * Output: 1591 * - None 1592 */ 1593 static target_ulong h_int_set_os_reporting_line(PowerPCCPU *cpu, 1594 SpaprMachineState *spapr, 1595 target_ulong opcode, 1596 target_ulong *args) 1597 { 1598 target_ulong flags = args[0]; 1599 1600 trace_spapr_xive_set_os_reporting_line(flags); 1601 1602 if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) { 1603 return H_FUNCTION; 1604 } 1605 1606 /* 1607 * H_STATE should be returned if a H_INT_RESET is in progress. 1608 * This is not needed when running the emulation under QEMU 1609 */ 1610 1611 /* TODO: H_INT_SET_OS_REPORTING_LINE */ 1612 return H_FUNCTION; 1613 } 1614 1615 /* 1616 * The H_INT_GET_OS_REPORTING_LINE hcall() is used to get the logical 1617 * real address of the reporting cache line pair set for the input 1618 * "target". If no reporting cache line pair has been set, -1 is 1619 * returned. 1620 * 1621 * Parameters: 1622 * Input: 1623 * - R4: "flags" 1624 * Bits 0-63: Reserved 1625 * - R5: "target" is per "ibm,ppc-interrupt-server#s" or 1626 * "ibm,ppc-interrupt-gserver#s" 1627 * - R6: "reportingLine": The logical real address of the reporting 1628 * cache line pair 1629 * 1630 * Output: 1631 * - R4: The logical real address of the reporting line if set, else -1 1632 */ 1633 static target_ulong h_int_get_os_reporting_line(PowerPCCPU *cpu, 1634 SpaprMachineState *spapr, 1635 target_ulong opcode, 1636 target_ulong *args) 1637 { 1638 target_ulong flags = args[0]; 1639 1640 trace_spapr_xive_get_os_reporting_line(flags); 1641 1642 if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) { 1643 return H_FUNCTION; 1644 } 1645 1646 /* 1647 * H_STATE should be returned if a H_INT_RESET is in progress. 1648 * This is not needed when running the emulation under QEMU 1649 */ 1650 1651 /* TODO: H_INT_GET_OS_REPORTING_LINE */ 1652 return H_FUNCTION; 1653 } 1654 1655 /* 1656 * The H_INT_ESB hcall() is used to issue a load or store to the ESB 1657 * page for the input "lisn". This hcall is only supported for LISNs 1658 * that have the ESB hcall flag set to 1 when returned from hcall() 1659 * H_INT_GET_SOURCE_INFO. 1660 * 1661 * Parameters: 1662 * Input: 1663 * - R4: "flags" 1664 * Bits 0-62: Reserved 1665 * bit 63: Store: Store=1, store operation, else load operation 1666 * - R5: "lisn" is per "interrupts", "interrupt-map", or 1667 * "ibm,xive-lisn-ranges" properties, or as returned by the 1668 * ibm,query-interrupt-source-number RTAS call, or as 1669 * returned by the H_ALLOCATE_VAS_WINDOW hcall 1670 * - R6: "esbOffset" is the offset into the ESB page for the load or 1671 * store operation 1672 * - R7: "storeData" is the data to write for a store operation 1673 * 1674 * Output: 1675 * - R4: The value of the load if load operation, else -1 1676 */ 1677 1678 #define SPAPR_XIVE_ESB_STORE PPC_BIT(63) 1679 1680 static target_ulong h_int_esb(PowerPCCPU *cpu, 1681 SpaprMachineState *spapr, 1682 target_ulong opcode, 1683 target_ulong *args) 1684 { 1685 SpaprXive *xive = spapr->xive; 1686 XiveEAS eas; 1687 target_ulong flags = args[0]; 1688 target_ulong lisn = args[1]; 1689 target_ulong offset = args[2]; 1690 target_ulong data = args[3]; 1691 hwaddr mmio_addr; 1692 XiveSource *xsrc = &xive->source; 1693 1694 trace_spapr_xive_esb(flags, lisn, offset, data); 1695 1696 if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) { 1697 return H_FUNCTION; 1698 } 1699 1700 if (flags & ~SPAPR_XIVE_ESB_STORE) { 1701 return H_PARAMETER; 1702 } 1703 1704 if (lisn >= xive->nr_irqs) { 1705 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Unknown LISN " TARGET_FMT_lx "\n", 1706 lisn); 1707 return H_P2; 1708 } 1709 1710 eas = xive->eat[lisn]; 1711 if (!xive_eas_is_valid(&eas)) { 1712 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Invalid LISN " TARGET_FMT_lx "\n", 1713 lisn); 1714 return H_P2; 1715 } 1716 1717 if (offset > (1ull << xsrc->esb_shift)) { 1718 return H_P3; 1719 } 1720 1721 if (spapr_xive_in_kernel(xive)) { 1722 args[0] = kvmppc_xive_esb_rw(xsrc, lisn, offset, data, 1723 flags & SPAPR_XIVE_ESB_STORE); 1724 } else { 1725 mmio_addr = xive->vc_base + xive_source_esb_mgmt(xsrc, lisn) + offset; 1726 1727 if (dma_memory_rw(&address_space_memory, mmio_addr, &data, 8, 1728 (flags & SPAPR_XIVE_ESB_STORE), 1729 MEMTXATTRS_UNSPECIFIED)) { 1730 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: failed to access ESB @0x%" 1731 HWADDR_PRIx "\n", mmio_addr); 1732 return H_HARDWARE; 1733 } 1734 args[0] = (flags & SPAPR_XIVE_ESB_STORE) ? -1 : data; 1735 } 1736 return H_SUCCESS; 1737 } 1738 1739 /* 1740 * The H_INT_SYNC hcall() is used to issue hardware syncs that will 1741 * ensure any in flight events for the input lisn are in the event 1742 * queue. 1743 * 1744 * Parameters: 1745 * Input: 1746 * - R4: "flags" 1747 * Bits 0-63: Reserved 1748 * - R5: "lisn" is per "interrupts", "interrupt-map", or 1749 * "ibm,xive-lisn-ranges" properties, or as returned by the 1750 * ibm,query-interrupt-source-number RTAS call, or as 1751 * returned by the H_ALLOCATE_VAS_WINDOW hcall 1752 * 1753 * Output: 1754 * - None 1755 */ 1756 static target_ulong h_int_sync(PowerPCCPU *cpu, 1757 SpaprMachineState *spapr, 1758 target_ulong opcode, 1759 target_ulong *args) 1760 { 1761 SpaprXive *xive = spapr->xive; 1762 XiveEAS eas; 1763 target_ulong flags = args[0]; 1764 target_ulong lisn = args[1]; 1765 1766 trace_spapr_xive_sync(flags, lisn); 1767 1768 if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) { 1769 return H_FUNCTION; 1770 } 1771 1772 if (flags) { 1773 return H_PARAMETER; 1774 } 1775 1776 if (lisn >= xive->nr_irqs) { 1777 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Unknown LISN " TARGET_FMT_lx "\n", 1778 lisn); 1779 return H_P2; 1780 } 1781 1782 eas = xive->eat[lisn]; 1783 if (!xive_eas_is_valid(&eas)) { 1784 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Invalid LISN " TARGET_FMT_lx "\n", 1785 lisn); 1786 return H_P2; 1787 } 1788 1789 /* 1790 * H_STATE should be returned if a H_INT_RESET is in progress. 1791 * This is not needed when running the emulation under QEMU 1792 */ 1793 1794 /* 1795 * This is not real hardware. Nothing to be done unless when 1796 * under KVM 1797 */ 1798 1799 if (spapr_xive_in_kernel(xive)) { 1800 Error *local_err = NULL; 1801 1802 kvmppc_xive_sync_source(xive, lisn, &local_err); 1803 if (local_err) { 1804 error_report_err(local_err); 1805 return H_HARDWARE; 1806 } 1807 } 1808 return H_SUCCESS; 1809 } 1810 1811 /* 1812 * The H_INT_RESET hcall() is used to reset all of the partition's 1813 * interrupt exploitation structures to their initial state. This 1814 * means losing all previously set interrupt state set via 1815 * H_INT_SET_SOURCE_CONFIG and H_INT_SET_QUEUE_CONFIG. 1816 * 1817 * Parameters: 1818 * Input: 1819 * - R4: "flags" 1820 * Bits 0-63: Reserved 1821 * 1822 * Output: 1823 * - None 1824 */ 1825 static target_ulong h_int_reset(PowerPCCPU *cpu, 1826 SpaprMachineState *spapr, 1827 target_ulong opcode, 1828 target_ulong *args) 1829 { 1830 SpaprXive *xive = spapr->xive; 1831 target_ulong flags = args[0]; 1832 1833 trace_spapr_xive_reset(flags); 1834 1835 if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) { 1836 return H_FUNCTION; 1837 } 1838 1839 if (flags) { 1840 return H_PARAMETER; 1841 } 1842 1843 device_cold_reset(DEVICE(xive)); 1844 1845 if (spapr_xive_in_kernel(xive)) { 1846 Error *local_err = NULL; 1847 1848 kvmppc_xive_reset(xive, &local_err); 1849 if (local_err) { 1850 error_report_err(local_err); 1851 return H_HARDWARE; 1852 } 1853 } 1854 return H_SUCCESS; 1855 } 1856 1857 void spapr_xive_hcall_init(SpaprMachineState *spapr) 1858 { 1859 spapr_register_hypercall(H_INT_GET_SOURCE_INFO, h_int_get_source_info); 1860 spapr_register_hypercall(H_INT_SET_SOURCE_CONFIG, h_int_set_source_config); 1861 spapr_register_hypercall(H_INT_GET_SOURCE_CONFIG, h_int_get_source_config); 1862 spapr_register_hypercall(H_INT_GET_QUEUE_INFO, h_int_get_queue_info); 1863 spapr_register_hypercall(H_INT_SET_QUEUE_CONFIG, h_int_set_queue_config); 1864 spapr_register_hypercall(H_INT_GET_QUEUE_CONFIG, h_int_get_queue_config); 1865 spapr_register_hypercall(H_INT_SET_OS_REPORTING_LINE, 1866 h_int_set_os_reporting_line); 1867 spapr_register_hypercall(H_INT_GET_OS_REPORTING_LINE, 1868 h_int_get_os_reporting_line); 1869 spapr_register_hypercall(H_INT_ESB, h_int_esb); 1870 spapr_register_hypercall(H_INT_SYNC, h_int_sync); 1871 spapr_register_hypercall(H_INT_RESET, h_int_reset); 1872 } 1873