1 /* 2 * QEMU PowerPC XIVE2 interrupt controller model (POWER10) 3 * 4 * Copyright (c) 2019-2024, IBM Corporation.. 5 * 6 * SPDX-License-Identifier: GPL-2.0-or-later 7 */ 8 9 #include "qemu/osdep.h" 10 #include "qemu/log.h" 11 #include "qemu/module.h" 12 #include "qapi/error.h" 13 #include "target/ppc/cpu.h" 14 #include "system/cpus.h" 15 #include "system/dma.h" 16 #include "hw/qdev-properties.h" 17 #include "hw/ppc/xive.h" 18 #include "hw/ppc/xive2.h" 19 #include "hw/ppc/xive2_regs.h" 20 #include "trace.h" 21 22 uint32_t xive2_router_get_config(Xive2Router *xrtr) 23 { 24 Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr); 25 26 return xrc->get_config(xrtr); 27 } 28 29 static int xive2_router_get_block_id(Xive2Router *xrtr) 30 { 31 Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr); 32 33 return xrc->get_block_id(xrtr); 34 } 35 36 static uint64_t xive2_nvp_reporting_addr(Xive2Nvp *nvp) 37 { 38 uint64_t cache_addr; 39 40 cache_addr = xive_get_field32(NVP2_W6_REPORTING_LINE, nvp->w6) << 24 | 41 xive_get_field32(NVP2_W7_REPORTING_LINE, nvp->w7); 42 cache_addr <<= 8; /* aligned on a cache line pair */ 43 return cache_addr; 44 } 45 46 static uint32_t xive2_nvgc_get_backlog(Xive2Nvgc *nvgc, uint8_t priority) 47 { 48 uint32_t val = 0; 49 uint8_t *ptr, i; 50 51 if (priority > 7) { 52 return 0; 53 } 54 55 /* 56 * The per-priority backlog counters are 24-bit and the structure 57 * is stored in big endian. NVGC is 32-bytes long, so 24-bytes from 58 * w2, which fits 8 priorities * 24-bits per priority. 59 */ 60 ptr = (uint8_t *)&nvgc->w2 + priority * 3; 61 for (i = 0; i < 3; i++, ptr++) { 62 val = (val << 8) + *ptr; 63 } 64 return val; 65 } 66 67 static void xive2_nvgc_set_backlog(Xive2Nvgc *nvgc, uint8_t priority, 68 uint32_t val) 69 { 70 uint8_t *ptr, i; 71 uint32_t shift; 72 73 if (priority > 7) { 74 return; 75 } 76 77 if (val > 0xFFFFFF) { 78 val = 0xFFFFFF; 79 } 80 /* 81 * The per-priority backlog counters are 24-bit and the structure 82 * is stored in big endian 83 */ 84 ptr = (uint8_t *)&nvgc->w2 + priority * 3; 85 for (i = 0; i < 3; i++, ptr++) { 86 shift = 8 * (2 - i); 87 *ptr = (val >> shift) & 0xFF; 88 } 89 } 90 91 uint64_t xive2_presenter_nvgc_backlog_op(XivePresenter *xptr, 92 bool crowd, 93 uint8_t blk, uint32_t idx, 94 uint16_t offset, uint16_t val) 95 { 96 Xive2Router *xrtr = XIVE2_ROUTER(xptr); 97 uint8_t priority = GETFIELD(NVx_BACKLOG_PRIO, offset); 98 uint8_t op = GETFIELD(NVx_BACKLOG_OP, offset); 99 Xive2Nvgc nvgc; 100 uint32_t count, old_count; 101 102 if (xive2_router_get_nvgc(xrtr, crowd, blk, idx, &nvgc)) { 103 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No %s %x/%x\n", 104 crowd ? "NVC" : "NVG", blk, idx); 105 return -1; 106 } 107 if (!xive2_nvgc_is_valid(&nvgc)) { 108 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Invalid NVG %x/%x\n", blk, idx); 109 return -1; 110 } 111 112 old_count = xive2_nvgc_get_backlog(&nvgc, priority); 113 count = old_count; 114 /* 115 * op: 116 * 0b00 => increment 117 * 0b01 => decrement 118 * 0b1- => read 119 */ 120 if (op == 0b00 || op == 0b01) { 121 if (op == 0b00) { 122 count += val; 123 } else { 124 if (count > val) { 125 count -= val; 126 } else { 127 count = 0; 128 } 129 } 130 xive2_nvgc_set_backlog(&nvgc, priority, count); 131 xive2_router_write_nvgc(xrtr, crowd, blk, idx, &nvgc); 132 } 133 trace_xive_nvgc_backlog_op(crowd, blk, idx, op, priority, old_count); 134 return old_count; 135 } 136 137 uint64_t xive2_presenter_nvp_backlog_op(XivePresenter *xptr, 138 uint8_t blk, uint32_t idx, 139 uint16_t offset) 140 { 141 Xive2Router *xrtr = XIVE2_ROUTER(xptr); 142 uint8_t priority = GETFIELD(NVx_BACKLOG_PRIO, offset); 143 uint8_t op = GETFIELD(NVx_BACKLOG_OP, offset); 144 Xive2Nvp nvp; 145 uint8_t ipb, old_ipb, rc; 146 147 if (xive2_router_get_nvp(xrtr, blk, idx, &nvp)) { 148 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No NVP %x/%x\n", blk, idx); 149 return -1; 150 } 151 if (!xive2_nvp_is_valid(&nvp)) { 152 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Invalid NVP %x/%x\n", blk, idx); 153 return -1; 154 } 155 156 old_ipb = xive_get_field32(NVP2_W2_IPB, nvp.w2); 157 ipb = old_ipb; 158 /* 159 * op: 160 * 0b00 => set priority bit 161 * 0b01 => reset priority bit 162 * 0b1- => read 163 */ 164 if (op == 0b00 || op == 0b01) { 165 if (op == 0b00) { 166 ipb |= xive_priority_to_ipb(priority); 167 } else { 168 ipb &= ~xive_priority_to_ipb(priority); 169 } 170 nvp.w2 = xive_set_field32(NVP2_W2_IPB, nvp.w2, ipb); 171 xive2_router_write_nvp(xrtr, blk, idx, &nvp, 2); 172 } 173 rc = !!(old_ipb & xive_priority_to_ipb(priority)); 174 trace_xive_nvp_backlog_op(blk, idx, op, priority, rc); 175 return rc; 176 } 177 178 void xive2_eas_pic_print_info(Xive2Eas *eas, uint32_t lisn, GString *buf) 179 { 180 if (!xive2_eas_is_valid(eas)) { 181 return; 182 } 183 184 g_string_append_printf(buf, " %08x %s end:%02x/%04x data:%08x\n", 185 lisn, xive2_eas_is_masked(eas) ? "M" : " ", 186 (uint8_t) xive_get_field64(EAS2_END_BLOCK, eas->w), 187 (uint32_t) xive_get_field64(EAS2_END_INDEX, eas->w), 188 (uint32_t) xive_get_field64(EAS2_END_DATA, eas->w)); 189 } 190 191 void xive2_end_queue_pic_print_info(Xive2End *end, uint32_t width, GString *buf) 192 { 193 uint64_t qaddr_base = xive2_end_qaddr(end); 194 uint32_t qsize = xive_get_field32(END2_W3_QSIZE, end->w3); 195 uint32_t qindex = xive_get_field32(END2_W1_PAGE_OFF, end->w1); 196 uint32_t qentries = 1 << (qsize + 10); 197 int i; 198 199 /* 200 * print out the [ (qindex - (width - 1)) .. (qindex + 1)] window 201 */ 202 g_string_append_printf(buf, " [ "); 203 qindex = (qindex - (width - 1)) & (qentries - 1); 204 for (i = 0; i < width; i++) { 205 uint64_t qaddr = qaddr_base + (qindex << 2); 206 uint32_t qdata = -1; 207 208 if (dma_memory_read(&address_space_memory, qaddr, &qdata, 209 sizeof(qdata), MEMTXATTRS_UNSPECIFIED)) { 210 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: failed to read EQ @0x%" 211 HWADDR_PRIx "\n", qaddr); 212 return; 213 } 214 g_string_append_printf(buf, "%s%08x ", i == width - 1 ? "^" : "", 215 be32_to_cpu(qdata)); 216 qindex = (qindex + 1) & (qentries - 1); 217 } 218 g_string_append_printf(buf, "]"); 219 } 220 221 void xive2_end_pic_print_info(Xive2End *end, uint32_t end_idx, GString *buf) 222 { 223 uint64_t qaddr_base = xive2_end_qaddr(end); 224 uint32_t qindex = xive_get_field32(END2_W1_PAGE_OFF, end->w1); 225 uint32_t qgen = xive_get_field32(END2_W1_GENERATION, end->w1); 226 uint32_t qsize = xive_get_field32(END2_W3_QSIZE, end->w3); 227 uint32_t qentries = 1 << (qsize + 10); 228 229 uint32_t nvx_blk = xive_get_field32(END2_W6_VP_BLOCK, end->w6); 230 uint32_t nvx_idx = xive_get_field32(END2_W6_VP_OFFSET, end->w6); 231 uint8_t priority = xive_get_field32(END2_W7_F0_PRIORITY, end->w7); 232 uint8_t pq; 233 234 if (!xive2_end_is_valid(end)) { 235 return; 236 } 237 238 pq = xive_get_field32(END2_W1_ESn, end->w1); 239 240 g_string_append_printf(buf, 241 " %08x %c%c %c%c%c%c%c%c%c%c%c%c%c %c%c " 242 "prio:%d nvp:%02x/%04x", 243 end_idx, 244 pq & XIVE_ESB_VAL_P ? 'P' : '-', 245 pq & XIVE_ESB_VAL_Q ? 'Q' : '-', 246 xive2_end_is_valid(end) ? 'v' : '-', 247 xive2_end_is_enqueue(end) ? 'q' : '-', 248 xive2_end_is_notify(end) ? 'n' : '-', 249 xive2_end_is_backlog(end) ? 'b' : '-', 250 xive2_end_is_precluded_escalation(end) ? 'p' : '-', 251 xive2_end_is_escalate(end) ? 'e' : '-', 252 xive2_end_is_escalate_end(end) ? 'N' : '-', 253 xive2_end_is_uncond_escalation(end) ? 'u' : '-', 254 xive2_end_is_silent_escalation(end) ? 's' : '-', 255 xive2_end_is_firmware1(end) ? 'f' : '-', 256 xive2_end_is_firmware2(end) ? 'F' : '-', 257 xive2_end_is_ignore(end) ? 'i' : '-', 258 xive2_end_is_crowd(end) ? 'c' : '-', 259 priority, nvx_blk, nvx_idx); 260 261 if (qaddr_base) { 262 g_string_append_printf(buf, " eq:@%08"PRIx64"% 6d/%5d ^%d", 263 qaddr_base, qindex, qentries, qgen); 264 xive2_end_queue_pic_print_info(end, 6, buf); 265 } 266 g_string_append_c(buf, '\n'); 267 } 268 269 void xive2_end_eas_pic_print_info(Xive2End *end, uint32_t end_idx, 270 GString *buf) 271 { 272 Xive2Eas *eas = (Xive2Eas *) &end->w4; 273 uint8_t pq; 274 275 if (!xive2_end_is_escalate(end)) { 276 return; 277 } 278 279 pq = xive_get_field32(END2_W1_ESe, end->w1); 280 281 g_string_append_printf(buf, " %08x %c%c %c%c end:%02x/%04x data:%08x\n", 282 end_idx, 283 pq & XIVE_ESB_VAL_P ? 'P' : '-', 284 pq & XIVE_ESB_VAL_Q ? 'Q' : '-', 285 xive2_eas_is_valid(eas) ? 'v' : ' ', 286 xive2_eas_is_masked(eas) ? 'M' : ' ', 287 (uint8_t) xive_get_field64(EAS2_END_BLOCK, eas->w), 288 (uint32_t) xive_get_field64(EAS2_END_INDEX, eas->w), 289 (uint32_t) xive_get_field64(EAS2_END_DATA, eas->w)); 290 } 291 292 void xive2_nvp_pic_print_info(Xive2Nvp *nvp, uint32_t nvp_idx, GString *buf) 293 { 294 uint8_t eq_blk = xive_get_field32(NVP2_W5_VP_END_BLOCK, nvp->w5); 295 uint32_t eq_idx = xive_get_field32(NVP2_W5_VP_END_INDEX, nvp->w5); 296 uint64_t cache_line = xive2_nvp_reporting_addr(nvp); 297 298 if (!xive2_nvp_is_valid(nvp)) { 299 return; 300 } 301 302 g_string_append_printf(buf, " %08x end:%02x/%04x IPB:%02x PGoFirst:%02x", 303 nvp_idx, eq_blk, eq_idx, 304 xive_get_field32(NVP2_W2_IPB, nvp->w2), 305 xive_get_field32(NVP2_W0_PGOFIRST, nvp->w0)); 306 if (cache_line) { 307 g_string_append_printf(buf, " reporting CL:%016"PRIx64, cache_line); 308 } 309 310 /* 311 * When the NVP is HW controlled, more fields are updated 312 */ 313 if (xive2_nvp_is_hw(nvp)) { 314 g_string_append_printf(buf, " CPPR:%02x", 315 xive_get_field32(NVP2_W2_CPPR, nvp->w2)); 316 if (xive2_nvp_is_co(nvp)) { 317 g_string_append_printf(buf, " CO:%04x", 318 xive_get_field32(NVP2_W1_CO_THRID, nvp->w1)); 319 } 320 } 321 g_string_append_c(buf, '\n'); 322 } 323 324 void xive2_nvgc_pic_print_info(Xive2Nvgc *nvgc, uint32_t nvgc_idx, GString *buf) 325 { 326 uint8_t i; 327 328 if (!xive2_nvgc_is_valid(nvgc)) { 329 return; 330 } 331 332 g_string_append_printf(buf, " %08x PGoNext:%02x bklog: ", nvgc_idx, 333 xive_get_field32(NVGC2_W0_PGONEXT, nvgc->w0)); 334 for (i = 0; i <= XIVE_PRIORITY_MAX; i++) { 335 g_string_append_printf(buf, "[%d]=0x%x ", 336 i, xive2_nvgc_get_backlog(nvgc, i)); 337 } 338 g_string_append_printf(buf, "\n"); 339 } 340 341 static void xive2_end_enqueue(Xive2End *end, uint32_t data) 342 { 343 uint64_t qaddr_base = xive2_end_qaddr(end); 344 uint32_t qsize = xive_get_field32(END2_W3_QSIZE, end->w3); 345 uint32_t qindex = xive_get_field32(END2_W1_PAGE_OFF, end->w1); 346 uint32_t qgen = xive_get_field32(END2_W1_GENERATION, end->w1); 347 348 uint64_t qaddr = qaddr_base + (qindex << 2); 349 uint32_t qdata = cpu_to_be32((qgen << 31) | (data & 0x7fffffff)); 350 uint32_t qentries = 1 << (qsize + 10); 351 352 if (dma_memory_write(&address_space_memory, qaddr, &qdata, sizeof(qdata), 353 MEMTXATTRS_UNSPECIFIED)) { 354 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: failed to write END data @0x%" 355 HWADDR_PRIx "\n", qaddr); 356 return; 357 } 358 359 qindex = (qindex + 1) & (qentries - 1); 360 if (qindex == 0) { 361 qgen ^= 1; 362 end->w1 = xive_set_field32(END2_W1_GENERATION, end->w1, qgen); 363 364 /* TODO(PowerNV): reset GF bit on a cache watch operation */ 365 end->w1 = xive_set_field32(END2_W1_GEN_FLIPPED, end->w1, qgen); 366 } 367 end->w1 = xive_set_field32(END2_W1_PAGE_OFF, end->w1, qindex); 368 } 369 370 static void xive2_pgofnext(uint8_t *nvgc_blk, uint32_t *nvgc_idx, 371 uint8_t next_level) 372 { 373 uint32_t mask, next_idx; 374 uint8_t next_blk; 375 376 /* 377 * Adjust the block and index of a VP for the next group/crowd 378 * size (PGofFirst/PGofNext field in the NVP and NVGC structures). 379 * 380 * The 6-bit group level is split into a 2-bit crowd and 4-bit 381 * group levels. Encoding is similar. However, we don't support 382 * crowd size of 8. So a crowd level of 0b11 is bumped to a crowd 383 * size of 16. 384 */ 385 next_blk = NVx_CROWD_LVL(next_level); 386 if (next_blk == 3) { 387 next_blk = 4; 388 } 389 mask = (1 << next_blk) - 1; 390 *nvgc_blk &= ~mask; 391 *nvgc_blk |= mask >> 1; 392 393 next_idx = NVx_GROUP_LVL(next_level); 394 mask = (1 << next_idx) - 1; 395 *nvgc_idx &= ~mask; 396 *nvgc_idx |= mask >> 1; 397 } 398 399 /* 400 * Scan the group chain and return the highest priority and group 401 * level of pending group interrupts. 402 */ 403 static uint8_t xive2_presenter_backlog_scan(XivePresenter *xptr, 404 uint8_t nvx_blk, uint32_t nvx_idx, 405 uint8_t first_group, 406 uint8_t *out_level) 407 { 408 Xive2Router *xrtr = XIVE2_ROUTER(xptr); 409 uint32_t nvgc_idx; 410 uint32_t current_level, count; 411 uint8_t nvgc_blk, prio; 412 Xive2Nvgc nvgc; 413 414 for (prio = 0; prio <= XIVE_PRIORITY_MAX; prio++) { 415 current_level = first_group & 0x3F; 416 nvgc_blk = nvx_blk; 417 nvgc_idx = nvx_idx; 418 419 while (current_level) { 420 xive2_pgofnext(&nvgc_blk, &nvgc_idx, current_level); 421 422 if (xive2_router_get_nvgc(xrtr, NVx_CROWD_LVL(current_level), 423 nvgc_blk, nvgc_idx, &nvgc)) { 424 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No NVGC %x/%x\n", 425 nvgc_blk, nvgc_idx); 426 return 0xFF; 427 } 428 if (!xive2_nvgc_is_valid(&nvgc)) { 429 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Invalid NVGC %x/%x\n", 430 nvgc_blk, nvgc_idx); 431 return 0xFF; 432 } 433 434 count = xive2_nvgc_get_backlog(&nvgc, prio); 435 if (count) { 436 *out_level = current_level; 437 return prio; 438 } 439 current_level = xive_get_field32(NVGC2_W0_PGONEXT, nvgc.w0) & 0x3F; 440 } 441 } 442 return 0xFF; 443 } 444 445 static void xive2_presenter_backlog_decr(XivePresenter *xptr, 446 uint8_t nvx_blk, uint32_t nvx_idx, 447 uint8_t group_prio, 448 uint8_t group_level) 449 { 450 Xive2Router *xrtr = XIVE2_ROUTER(xptr); 451 uint32_t nvgc_idx, count; 452 uint8_t nvgc_blk; 453 Xive2Nvgc nvgc; 454 455 nvgc_blk = nvx_blk; 456 nvgc_idx = nvx_idx; 457 xive2_pgofnext(&nvgc_blk, &nvgc_idx, group_level); 458 459 if (xive2_router_get_nvgc(xrtr, NVx_CROWD_LVL(group_level), 460 nvgc_blk, nvgc_idx, &nvgc)) { 461 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No NVGC %x/%x\n", 462 nvgc_blk, nvgc_idx); 463 return; 464 } 465 if (!xive2_nvgc_is_valid(&nvgc)) { 466 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Invalid NVGC %x/%x\n", 467 nvgc_blk, nvgc_idx); 468 return; 469 } 470 count = xive2_nvgc_get_backlog(&nvgc, group_prio); 471 if (!count) { 472 return; 473 } 474 xive2_nvgc_set_backlog(&nvgc, group_prio, count - 1); 475 xive2_router_write_nvgc(xrtr, NVx_CROWD_LVL(group_level), 476 nvgc_blk, nvgc_idx, &nvgc); 477 } 478 479 /* 480 * XIVE Thread Interrupt Management Area (TIMA) - Gen2 mode 481 * 482 * TIMA Gen2 VP “save & restore” (S&R) indicated by H bit next to V bit 483 * 484 * - if a context is enabled with the H bit set, the VP context 485 * information is retrieved from the NVP structure (“check out”) 486 * and stored back on a context pull (“check in”), the SW receives 487 * the same context pull information as on P9 488 * 489 * - the H bit cannot be changed while the V bit is set, i.e. a 490 * context cannot be set up in the TIMA and then be “pushed” into 491 * the NVP by changing the H bit while the context is enabled 492 */ 493 494 static void xive2_tctx_save_ctx(Xive2Router *xrtr, XiveTCTX *tctx, 495 uint8_t nvp_blk, uint32_t nvp_idx, 496 uint8_t ring) 497 { 498 CPUPPCState *env = &POWERPC_CPU(tctx->cs)->env; 499 uint32_t pir = env->spr_cb[SPR_PIR].default_value; 500 Xive2Nvp nvp; 501 uint8_t *regs = &tctx->regs[ring]; 502 503 if (xive2_router_get_nvp(xrtr, nvp_blk, nvp_idx, &nvp)) { 504 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No NVP %x/%x\n", 505 nvp_blk, nvp_idx); 506 return; 507 } 508 509 if (!xive2_nvp_is_valid(&nvp)) { 510 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: invalid NVP %x/%x\n", 511 nvp_blk, nvp_idx); 512 return; 513 } 514 515 if (!xive2_nvp_is_hw(&nvp)) { 516 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: NVP %x/%x is not HW owned\n", 517 nvp_blk, nvp_idx); 518 return; 519 } 520 521 if (!xive2_nvp_is_co(&nvp)) { 522 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: NVP %x/%x is not checkout\n", 523 nvp_blk, nvp_idx); 524 return; 525 } 526 527 if (xive_get_field32(NVP2_W1_CO_THRID_VALID, nvp.w1) && 528 xive_get_field32(NVP2_W1_CO_THRID, nvp.w1) != pir) { 529 qemu_log_mask(LOG_GUEST_ERROR, 530 "XIVE: NVP %x/%x invalid checkout Thread %x\n", 531 nvp_blk, nvp_idx, pir); 532 return; 533 } 534 535 nvp.w2 = xive_set_field32(NVP2_W2_IPB, nvp.w2, regs[TM_IPB]); 536 nvp.w2 = xive_set_field32(NVP2_W2_CPPR, nvp.w2, regs[TM_CPPR]); 537 if (nvp.w0 & NVP2_W0_L) { 538 /* 539 * Typically not used. If LSMFB is restored with 0, it will 540 * force a backlog rescan 541 */ 542 nvp.w2 = xive_set_field32(NVP2_W2_LSMFB, nvp.w2, regs[TM_LSMFB]); 543 } 544 if (nvp.w0 & NVP2_W0_G) { 545 nvp.w2 = xive_set_field32(NVP2_W2_LGS, nvp.w2, regs[TM_LGS]); 546 } 547 if (nvp.w0 & NVP2_W0_T) { 548 nvp.w2 = xive_set_field32(NVP2_W2_T, nvp.w2, regs[TM_T]); 549 } 550 xive2_router_write_nvp(xrtr, nvp_blk, nvp_idx, &nvp, 2); 551 552 nvp.w1 = xive_set_field32(NVP2_W1_CO, nvp.w1, 0); 553 /* NVP2_W1_CO_THRID_VALID only set once */ 554 nvp.w1 = xive_set_field32(NVP2_W1_CO_THRID, nvp.w1, 0xFFFF); 555 xive2_router_write_nvp(xrtr, nvp_blk, nvp_idx, &nvp, 1); 556 } 557 558 static void xive2_cam_decode(uint32_t cam, uint8_t *nvp_blk, 559 uint32_t *nvp_idx, bool *valid, bool *hw) 560 { 561 *nvp_blk = xive2_nvp_blk(cam); 562 *nvp_idx = xive2_nvp_idx(cam); 563 *valid = !!(cam & TM2_W2_VALID); 564 *hw = !!(cam & TM2_W2_HW); 565 } 566 567 /* 568 * Encode the HW CAM line with 7bit or 8bit thread id. The thread id 569 * width and block id width is configurable at the IC level. 570 * 571 * chipid << 24 | 0000 0000 0000 0000 1 threadid (7Bit) 572 * chipid << 24 | 0000 0000 0000 0001 threadid (8Bit) 573 */ 574 static uint32_t xive2_tctx_hw_cam_line(XivePresenter *xptr, XiveTCTX *tctx) 575 { 576 Xive2Router *xrtr = XIVE2_ROUTER(xptr); 577 CPUPPCState *env = &POWERPC_CPU(tctx->cs)->env; 578 uint32_t pir = env->spr_cb[SPR_PIR].default_value; 579 uint8_t blk = xive2_router_get_block_id(xrtr); 580 uint8_t tid_shift = 581 xive2_router_get_config(xrtr) & XIVE2_THREADID_8BITS ? 8 : 7; 582 uint8_t tid_mask = (1 << tid_shift) - 1; 583 584 return xive2_nvp_cam_line(blk, 1 << tid_shift | (pir & tid_mask)); 585 } 586 587 static uint64_t xive2_tm_pull_ctx(XivePresenter *xptr, XiveTCTX *tctx, 588 hwaddr offset, unsigned size, uint8_t ring) 589 { 590 Xive2Router *xrtr = XIVE2_ROUTER(xptr); 591 uint32_t target_ringw2 = xive_tctx_word2(&tctx->regs[ring]); 592 uint32_t cam = be32_to_cpu(target_ringw2); 593 uint8_t nvp_blk; 594 uint32_t nvp_idx; 595 uint8_t cur_ring; 596 bool valid; 597 bool do_save; 598 599 xive2_cam_decode(cam, &nvp_blk, &nvp_idx, &valid, &do_save); 600 601 if (!valid) { 602 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: pulling invalid NVP %x/%x !?\n", 603 nvp_blk, nvp_idx); 604 } 605 606 /* Invalidate CAM line of requested ring and all lower rings */ 607 for (cur_ring = TM_QW0_USER; cur_ring <= ring; 608 cur_ring += XIVE_TM_RING_SIZE) { 609 uint32_t ringw2 = xive_tctx_word2(&tctx->regs[cur_ring]); 610 uint32_t ringw2_new = xive_set_field32(TM2_QW1W2_VO, ringw2, 0); 611 memcpy(&tctx->regs[cur_ring + TM_WORD2], &ringw2_new, 4); 612 } 613 614 if (xive2_router_get_config(xrtr) & XIVE2_VP_SAVE_RESTORE && do_save) { 615 xive2_tctx_save_ctx(xrtr, tctx, nvp_blk, nvp_idx, ring); 616 } 617 618 /* 619 * Lower external interrupt line of requested ring and below except for 620 * USER, which doesn't exist. 621 */ 622 for (cur_ring = TM_QW1_OS; cur_ring <= ring; 623 cur_ring += XIVE_TM_RING_SIZE) { 624 xive_tctx_reset_signal(tctx, cur_ring); 625 } 626 return target_ringw2; 627 } 628 629 uint64_t xive2_tm_pull_os_ctx(XivePresenter *xptr, XiveTCTX *tctx, 630 hwaddr offset, unsigned size) 631 { 632 return xive2_tm_pull_ctx(xptr, tctx, offset, size, TM_QW1_OS); 633 } 634 635 #define REPORT_LINE_GEN1_SIZE 16 636 637 static void xive2_tm_report_line_gen1(XiveTCTX *tctx, uint8_t *data, 638 uint8_t size) 639 { 640 uint8_t *regs = tctx->regs; 641 642 g_assert(size == REPORT_LINE_GEN1_SIZE); 643 memset(data, 0, size); 644 /* 645 * See xive architecture for description of what is saved. It is 646 * hand-picked information to fit in 16 bytes. 647 */ 648 data[0x0] = regs[TM_QW3_HV_PHYS + TM_NSR]; 649 data[0x1] = regs[TM_QW3_HV_PHYS + TM_CPPR]; 650 data[0x2] = regs[TM_QW3_HV_PHYS + TM_IPB]; 651 data[0x3] = regs[TM_QW2_HV_POOL + TM_IPB]; 652 data[0x4] = regs[TM_QW1_OS + TM_ACK_CNT]; 653 data[0x5] = regs[TM_QW3_HV_PHYS + TM_LGS]; 654 data[0x6] = 0xFF; 655 data[0x7] = regs[TM_QW3_HV_PHYS + TM_WORD2] & 0x80; 656 data[0x7] |= (regs[TM_QW2_HV_POOL + TM_WORD2] & 0x80) >> 1; 657 data[0x7] |= (regs[TM_QW1_OS + TM_WORD2] & 0x80) >> 2; 658 data[0x7] |= (regs[TM_QW3_HV_PHYS + TM_WORD2] & 0x3); 659 data[0x8] = regs[TM_QW1_OS + TM_NSR]; 660 data[0x9] = regs[TM_QW1_OS + TM_CPPR]; 661 data[0xA] = regs[TM_QW1_OS + TM_IPB]; 662 data[0xB] = regs[TM_QW1_OS + TM_LGS]; 663 if (regs[TM_QW0_USER + TM_WORD2] & 0x80) { 664 /* 665 * Logical server extension, except VU bit replaced by EB bit 666 * from NSR 667 */ 668 data[0xC] = regs[TM_QW0_USER + TM_WORD2]; 669 data[0xC] &= ~0x80; 670 data[0xC] |= regs[TM_QW0_USER + TM_NSR] & 0x80; 671 data[0xD] = regs[TM_QW0_USER + TM_WORD2 + 1]; 672 data[0xE] = regs[TM_QW0_USER + TM_WORD2 + 2]; 673 data[0xF] = regs[TM_QW0_USER + TM_WORD2 + 3]; 674 } 675 } 676 677 static void xive2_tm_pull_ctx_ol(XivePresenter *xptr, XiveTCTX *tctx, 678 hwaddr offset, uint64_t value, 679 unsigned size, uint8_t ring) 680 { 681 Xive2Router *xrtr = XIVE2_ROUTER(xptr); 682 uint32_t hw_cam, nvp_idx, xive2_cfg, reserved; 683 uint8_t nvp_blk; 684 Xive2Nvp nvp; 685 uint64_t phys_addr; 686 MemTxResult result; 687 688 hw_cam = xive2_tctx_hw_cam_line(xptr, tctx); 689 nvp_blk = xive2_nvp_blk(hw_cam); 690 nvp_idx = xive2_nvp_idx(hw_cam); 691 692 if (xive2_router_get_nvp(xrtr, nvp_blk, nvp_idx, &nvp)) { 693 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No NVP %x/%x\n", 694 nvp_blk, nvp_idx); 695 return; 696 } 697 698 if (!xive2_nvp_is_valid(&nvp)) { 699 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: invalid NVP %x/%x\n", 700 nvp_blk, nvp_idx); 701 return; 702 } 703 704 xive2_cfg = xive2_router_get_config(xrtr); 705 706 phys_addr = xive2_nvp_reporting_addr(&nvp) + 0x80; /* odd line */ 707 if (xive2_cfg & XIVE2_GEN1_TIMA_OS) { 708 uint8_t pull_ctxt[REPORT_LINE_GEN1_SIZE]; 709 710 xive2_tm_report_line_gen1(tctx, pull_ctxt, REPORT_LINE_GEN1_SIZE); 711 result = dma_memory_write(&address_space_memory, phys_addr, 712 pull_ctxt, REPORT_LINE_GEN1_SIZE, 713 MEMTXATTRS_UNSPECIFIED); 714 assert(result == MEMTX_OK); 715 } else { 716 result = dma_memory_write(&address_space_memory, phys_addr, 717 &tctx->regs, sizeof(tctx->regs), 718 MEMTXATTRS_UNSPECIFIED); 719 assert(result == MEMTX_OK); 720 reserved = 0xFFFFFFFF; 721 result = dma_memory_write(&address_space_memory, phys_addr + 12, 722 &reserved, sizeof(reserved), 723 MEMTXATTRS_UNSPECIFIED); 724 assert(result == MEMTX_OK); 725 } 726 727 /* the rest is similar to pull context to registers */ 728 xive2_tm_pull_ctx(xptr, tctx, offset, size, ring); 729 } 730 731 void xive2_tm_pull_os_ctx_ol(XivePresenter *xptr, XiveTCTX *tctx, 732 hwaddr offset, uint64_t value, unsigned size) 733 { 734 xive2_tm_pull_ctx_ol(xptr, tctx, offset, value, size, TM_QW1_OS); 735 } 736 737 738 void xive2_tm_pull_phys_ctx_ol(XivePresenter *xptr, XiveTCTX *tctx, 739 hwaddr offset, uint64_t value, unsigned size) 740 { 741 xive2_tm_pull_ctx_ol(xptr, tctx, offset, value, size, TM_QW3_HV_PHYS); 742 } 743 744 static uint8_t xive2_tctx_restore_os_ctx(Xive2Router *xrtr, XiveTCTX *tctx, 745 uint8_t nvp_blk, uint32_t nvp_idx, 746 Xive2Nvp *nvp) 747 { 748 CPUPPCState *env = &POWERPC_CPU(tctx->cs)->env; 749 uint32_t pir = env->spr_cb[SPR_PIR].default_value; 750 uint8_t cppr; 751 752 if (!xive2_nvp_is_hw(nvp)) { 753 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: NVP %x/%x is not HW owned\n", 754 nvp_blk, nvp_idx); 755 return 0; 756 } 757 758 cppr = xive_get_field32(NVP2_W2_CPPR, nvp->w2); 759 nvp->w2 = xive_set_field32(NVP2_W2_CPPR, nvp->w2, 0); 760 xive2_router_write_nvp(xrtr, nvp_blk, nvp_idx, nvp, 2); 761 762 tctx->regs[TM_QW1_OS + TM_CPPR] = cppr; 763 tctx->regs[TM_QW1_OS + TM_LSMFB] = xive_get_field32(NVP2_W2_LSMFB, nvp->w2); 764 tctx->regs[TM_QW1_OS + TM_LGS] = xive_get_field32(NVP2_W2_LGS, nvp->w2); 765 tctx->regs[TM_QW1_OS + TM_T] = xive_get_field32(NVP2_W2_T, nvp->w2); 766 767 nvp->w1 = xive_set_field32(NVP2_W1_CO, nvp->w1, 1); 768 nvp->w1 = xive_set_field32(NVP2_W1_CO_THRID_VALID, nvp->w1, 1); 769 nvp->w1 = xive_set_field32(NVP2_W1_CO_THRID, nvp->w1, pir); 770 771 /* 772 * Checkout privilege: 0:OS, 1:Pool, 2:Hard 773 * 774 * TODO: we only support OS push/pull 775 */ 776 nvp->w1 = xive_set_field32(NVP2_W1_CO_PRIV, nvp->w1, 0); 777 778 xive2_router_write_nvp(xrtr, nvp_blk, nvp_idx, nvp, 1); 779 780 /* return restored CPPR to generate a CPU exception if needed */ 781 return cppr; 782 } 783 784 static void xive2_tctx_need_resend(Xive2Router *xrtr, XiveTCTX *tctx, 785 uint8_t nvp_blk, uint32_t nvp_idx, 786 bool do_restore) 787 { 788 XivePresenter *xptr = XIVE_PRESENTER(xrtr); 789 uint8_t ipb; 790 uint8_t backlog_level; 791 uint8_t group_level; 792 uint8_t first_group; 793 uint8_t backlog_prio; 794 uint8_t group_prio; 795 uint8_t *regs = &tctx->regs[TM_QW1_OS]; 796 Xive2Nvp nvp; 797 798 /* 799 * Grab the associated thread interrupt context registers in the 800 * associated NVP 801 */ 802 if (xive2_router_get_nvp(xrtr, nvp_blk, nvp_idx, &nvp)) { 803 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No NVP %x/%x\n", 804 nvp_blk, nvp_idx); 805 return; 806 } 807 808 if (!xive2_nvp_is_valid(&nvp)) { 809 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: invalid NVP %x/%x\n", 810 nvp_blk, nvp_idx); 811 return; 812 } 813 814 /* Automatically restore thread context registers */ 815 if (xive2_router_get_config(xrtr) & XIVE2_VP_SAVE_RESTORE && 816 do_restore) { 817 xive2_tctx_restore_os_ctx(xrtr, tctx, nvp_blk, nvp_idx, &nvp); 818 } 819 820 ipb = xive_get_field32(NVP2_W2_IPB, nvp.w2); 821 if (ipb) { 822 nvp.w2 = xive_set_field32(NVP2_W2_IPB, nvp.w2, 0); 823 xive2_router_write_nvp(xrtr, nvp_blk, nvp_idx, &nvp, 2); 824 } 825 regs[TM_IPB] |= ipb; 826 backlog_prio = xive_ipb_to_pipr(ipb); 827 backlog_level = 0; 828 829 first_group = xive_get_field32(NVP2_W0_PGOFIRST, nvp.w0); 830 if (first_group && regs[TM_LSMFB] < backlog_prio) { 831 group_prio = xive2_presenter_backlog_scan(xptr, nvp_blk, nvp_idx, 832 first_group, &group_level); 833 regs[TM_LSMFB] = group_prio; 834 if (regs[TM_LGS] && group_prio < backlog_prio) { 835 /* VP can take a group interrupt */ 836 xive2_presenter_backlog_decr(xptr, nvp_blk, nvp_idx, 837 group_prio, group_level); 838 backlog_prio = group_prio; 839 backlog_level = group_level; 840 } 841 } 842 843 /* 844 * Compute the PIPR based on the restored state. 845 * It will raise the External interrupt signal if needed. 846 */ 847 xive_tctx_pipr_update(tctx, TM_QW1_OS, backlog_prio, backlog_level); 848 } 849 850 /* 851 * Updating the OS CAM line can trigger a resend of interrupt 852 */ 853 void xive2_tm_push_os_ctx(XivePresenter *xptr, XiveTCTX *tctx, 854 hwaddr offset, uint64_t value, unsigned size) 855 { 856 uint32_t cam; 857 uint32_t qw1w2; 858 uint64_t qw1dw1; 859 uint8_t nvp_blk; 860 uint32_t nvp_idx; 861 bool vo; 862 bool do_restore; 863 864 /* First update the thead context */ 865 switch (size) { 866 case 4: 867 cam = value; 868 qw1w2 = cpu_to_be32(cam); 869 memcpy(&tctx->regs[TM_QW1_OS + TM_WORD2], &qw1w2, 4); 870 break; 871 case 8: 872 cam = value >> 32; 873 qw1dw1 = cpu_to_be64(value); 874 memcpy(&tctx->regs[TM_QW1_OS + TM_WORD2], &qw1dw1, 8); 875 break; 876 default: 877 g_assert_not_reached(); 878 } 879 880 xive2_cam_decode(cam, &nvp_blk, &nvp_idx, &vo, &do_restore); 881 882 /* Check the interrupt pending bits */ 883 if (vo) { 884 xive2_tctx_need_resend(XIVE2_ROUTER(xptr), tctx, nvp_blk, nvp_idx, 885 do_restore); 886 } 887 } 888 889 static int xive2_tctx_get_nvp_indexes(XiveTCTX *tctx, uint8_t ring, 890 uint32_t *nvp_blk, uint32_t *nvp_idx) 891 { 892 uint32_t w2, cam; 893 894 w2 = xive_tctx_word2(&tctx->regs[ring]); 895 switch (ring) { 896 case TM_QW1_OS: 897 if (!(be32_to_cpu(w2) & TM2_QW1W2_VO)) { 898 return -1; 899 } 900 cam = xive_get_field32(TM2_QW1W2_OS_CAM, w2); 901 break; 902 case TM_QW2_HV_POOL: 903 if (!(be32_to_cpu(w2) & TM2_QW2W2_VP)) { 904 return -1; 905 } 906 cam = xive_get_field32(TM2_QW2W2_POOL_CAM, w2); 907 break; 908 case TM_QW3_HV_PHYS: 909 if (!(be32_to_cpu(w2) & TM2_QW3W2_VT)) { 910 return -1; 911 } 912 cam = xive2_tctx_hw_cam_line(tctx->xptr, tctx); 913 break; 914 default: 915 return -1; 916 } 917 *nvp_blk = xive2_nvp_blk(cam); 918 *nvp_idx = xive2_nvp_idx(cam); 919 return 0; 920 } 921 922 static void xive2_tctx_set_cppr(XiveTCTX *tctx, uint8_t ring, uint8_t cppr) 923 { 924 uint8_t *regs = &tctx->regs[ring]; 925 Xive2Router *xrtr = XIVE2_ROUTER(tctx->xptr); 926 uint8_t old_cppr, backlog_prio, first_group, group_level = 0; 927 uint8_t pipr_min, lsmfb_min, ring_min; 928 bool group_enabled; 929 uint32_t nvp_blk, nvp_idx; 930 Xive2Nvp nvp; 931 int rc; 932 933 trace_xive_tctx_set_cppr(tctx->cs->cpu_index, ring, 934 regs[TM_IPB], regs[TM_PIPR], 935 cppr, regs[TM_NSR]); 936 937 if (cppr > XIVE_PRIORITY_MAX) { 938 cppr = 0xff; 939 } 940 941 old_cppr = regs[TM_CPPR]; 942 regs[TM_CPPR] = cppr; 943 944 /* 945 * Recompute the PIPR based on local pending interrupts. It will 946 * be adjusted below if needed in case of pending group interrupts. 947 */ 948 pipr_min = xive_ipb_to_pipr(regs[TM_IPB]); 949 group_enabled = !!regs[TM_LGS]; 950 lsmfb_min = (group_enabled) ? regs[TM_LSMFB] : 0xff; 951 ring_min = ring; 952 953 /* PHYS updates also depend on POOL values */ 954 if (ring == TM_QW3_HV_PHYS) { 955 uint8_t *pregs = &tctx->regs[TM_QW2_HV_POOL]; 956 957 /* POOL values only matter if POOL ctx is valid */ 958 if (pregs[TM_WORD2] & 0x80) { 959 960 uint8_t pool_pipr = xive_ipb_to_pipr(pregs[TM_IPB]); 961 uint8_t pool_lsmfb = pregs[TM_LSMFB]; 962 963 /* 964 * Determine highest priority interrupt and 965 * remember which ring has it. 966 */ 967 if (pool_pipr < pipr_min) { 968 pipr_min = pool_pipr; 969 if (pool_pipr < lsmfb_min) { 970 ring_min = TM_QW2_HV_POOL; 971 } 972 } 973 974 /* Values needed for group priority calculation */ 975 if (pregs[TM_LGS] && (pool_lsmfb < lsmfb_min)) { 976 group_enabled = true; 977 lsmfb_min = pool_lsmfb; 978 if (lsmfb_min < pipr_min) { 979 ring_min = TM_QW2_HV_POOL; 980 } 981 } 982 } 983 } 984 regs[TM_PIPR] = pipr_min; 985 986 rc = xive2_tctx_get_nvp_indexes(tctx, ring_min, &nvp_blk, &nvp_idx); 987 if (rc) { 988 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: set CPPR on invalid context\n"); 989 return; 990 } 991 992 if (cppr < old_cppr) { 993 /* 994 * FIXME: check if there's a group interrupt being presented 995 * and if the new cppr prevents it. If so, then the group 996 * interrupt needs to be re-added to the backlog and 997 * re-triggered (see re-trigger END info in the NVGC 998 * structure) 999 */ 1000 } 1001 1002 if (group_enabled && 1003 lsmfb_min < cppr && 1004 lsmfb_min < regs[TM_PIPR]) { 1005 /* 1006 * Thread has seen a group interrupt with a higher priority 1007 * than the new cppr or pending local interrupt. Check the 1008 * backlog 1009 */ 1010 if (xive2_router_get_nvp(xrtr, nvp_blk, nvp_idx, &nvp)) { 1011 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No NVP %x/%x\n", 1012 nvp_blk, nvp_idx); 1013 return; 1014 } 1015 1016 if (!xive2_nvp_is_valid(&nvp)) { 1017 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: invalid NVP %x/%x\n", 1018 nvp_blk, nvp_idx); 1019 return; 1020 } 1021 1022 first_group = xive_get_field32(NVP2_W0_PGOFIRST, nvp.w0); 1023 if (!first_group) { 1024 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: invalid NVP %x/%x\n", 1025 nvp_blk, nvp_idx); 1026 return; 1027 } 1028 1029 backlog_prio = xive2_presenter_backlog_scan(tctx->xptr, 1030 nvp_blk, nvp_idx, 1031 first_group, &group_level); 1032 tctx->regs[ring_min + TM_LSMFB] = backlog_prio; 1033 if (backlog_prio != 0xFF) { 1034 xive2_presenter_backlog_decr(tctx->xptr, nvp_blk, nvp_idx, 1035 backlog_prio, group_level); 1036 regs[TM_PIPR] = backlog_prio; 1037 } 1038 } 1039 /* CPPR has changed, check if we need to raise a pending exception */ 1040 xive_tctx_notify(tctx, ring_min, group_level); 1041 } 1042 1043 void xive2_tm_set_hv_cppr(XivePresenter *xptr, XiveTCTX *tctx, 1044 hwaddr offset, uint64_t value, unsigned size) 1045 { 1046 xive2_tctx_set_cppr(tctx, TM_QW3_HV_PHYS, value & 0xff); 1047 } 1048 1049 void xive2_tm_set_os_cppr(XivePresenter *xptr, XiveTCTX *tctx, 1050 hwaddr offset, uint64_t value, unsigned size) 1051 { 1052 xive2_tctx_set_cppr(tctx, TM_QW1_OS, value & 0xff); 1053 } 1054 1055 static void xive2_tctx_set_target(XiveTCTX *tctx, uint8_t ring, uint8_t target) 1056 { 1057 uint8_t *regs = &tctx->regs[ring]; 1058 1059 regs[TM_T] = target; 1060 } 1061 1062 void xive2_tm_set_hv_target(XivePresenter *xptr, XiveTCTX *tctx, 1063 hwaddr offset, uint64_t value, unsigned size) 1064 { 1065 xive2_tctx_set_target(tctx, TM_QW3_HV_PHYS, value & 0xff); 1066 } 1067 1068 /* 1069 * XIVE Router (aka. Virtualization Controller or IVRE) 1070 */ 1071 1072 int xive2_router_get_eas(Xive2Router *xrtr, uint8_t eas_blk, uint32_t eas_idx, 1073 Xive2Eas *eas) 1074 { 1075 Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr); 1076 1077 return xrc->get_eas(xrtr, eas_blk, eas_idx, eas); 1078 } 1079 1080 static 1081 int xive2_router_get_pq(Xive2Router *xrtr, uint8_t eas_blk, uint32_t eas_idx, 1082 uint8_t *pq) 1083 { 1084 Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr); 1085 1086 return xrc->get_pq(xrtr, eas_blk, eas_idx, pq); 1087 } 1088 1089 static 1090 int xive2_router_set_pq(Xive2Router *xrtr, uint8_t eas_blk, uint32_t eas_idx, 1091 uint8_t *pq) 1092 { 1093 Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr); 1094 1095 return xrc->set_pq(xrtr, eas_blk, eas_idx, pq); 1096 } 1097 1098 int xive2_router_get_end(Xive2Router *xrtr, uint8_t end_blk, uint32_t end_idx, 1099 Xive2End *end) 1100 { 1101 Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr); 1102 1103 return xrc->get_end(xrtr, end_blk, end_idx, end); 1104 } 1105 1106 int xive2_router_write_end(Xive2Router *xrtr, uint8_t end_blk, uint32_t end_idx, 1107 Xive2End *end, uint8_t word_number) 1108 { 1109 Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr); 1110 1111 return xrc->write_end(xrtr, end_blk, end_idx, end, word_number); 1112 } 1113 1114 int xive2_router_get_nvp(Xive2Router *xrtr, uint8_t nvp_blk, uint32_t nvp_idx, 1115 Xive2Nvp *nvp) 1116 { 1117 Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr); 1118 1119 return xrc->get_nvp(xrtr, nvp_blk, nvp_idx, nvp); 1120 } 1121 1122 int xive2_router_write_nvp(Xive2Router *xrtr, uint8_t nvp_blk, uint32_t nvp_idx, 1123 Xive2Nvp *nvp, uint8_t word_number) 1124 { 1125 Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr); 1126 1127 return xrc->write_nvp(xrtr, nvp_blk, nvp_idx, nvp, word_number); 1128 } 1129 1130 int xive2_router_get_nvgc(Xive2Router *xrtr, bool crowd, 1131 uint8_t nvgc_blk, uint32_t nvgc_idx, 1132 Xive2Nvgc *nvgc) 1133 { 1134 Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr); 1135 1136 return xrc->get_nvgc(xrtr, crowd, nvgc_blk, nvgc_idx, nvgc); 1137 } 1138 1139 int xive2_router_write_nvgc(Xive2Router *xrtr, bool crowd, 1140 uint8_t nvgc_blk, uint32_t nvgc_idx, 1141 Xive2Nvgc *nvgc) 1142 { 1143 Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr); 1144 1145 return xrc->write_nvgc(xrtr, crowd, nvgc_blk, nvgc_idx, nvgc); 1146 } 1147 1148 static bool xive2_vp_match_mask(uint32_t cam1, uint32_t cam2, 1149 uint32_t vp_mask) 1150 { 1151 return (cam1 & vp_mask) == (cam2 & vp_mask); 1152 } 1153 1154 static uint8_t xive2_get_vp_block_mask(uint32_t nvt_blk, bool crowd) 1155 { 1156 uint8_t block_mask = 0b1111; 1157 1158 /* 3 supported crowd sizes: 2, 4, 16 */ 1159 if (crowd) { 1160 uint32_t size = xive_get_vpgroup_size(nvt_blk); 1161 1162 if (size != 2 && size != 4 && size != 16) { 1163 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Invalid crowd size of %d", 1164 size); 1165 return block_mask; 1166 } 1167 block_mask &= ~(size - 1); 1168 } 1169 return block_mask; 1170 } 1171 1172 static uint32_t xive2_get_vp_index_mask(uint32_t nvt_index, bool cam_ignore) 1173 { 1174 uint32_t index_mask = 0xFFFFFF; /* 24 bits */ 1175 1176 if (cam_ignore) { 1177 uint32_t size = xive_get_vpgroup_size(nvt_index); 1178 1179 if (size < 2) { 1180 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Invalid group size of %d", 1181 size); 1182 return index_mask; 1183 } 1184 index_mask &= ~(size - 1); 1185 } 1186 return index_mask; 1187 } 1188 1189 /* 1190 * The thread context register words are in big-endian format. 1191 */ 1192 int xive2_presenter_tctx_match(XivePresenter *xptr, XiveTCTX *tctx, 1193 uint8_t format, 1194 uint8_t nvt_blk, uint32_t nvt_idx, 1195 bool crowd, bool cam_ignore, 1196 uint32_t logic_serv) 1197 { 1198 uint32_t cam = xive2_nvp_cam_line(nvt_blk, nvt_idx); 1199 uint32_t qw3w2 = xive_tctx_word2(&tctx->regs[TM_QW3_HV_PHYS]); 1200 uint32_t qw2w2 = xive_tctx_word2(&tctx->regs[TM_QW2_HV_POOL]); 1201 uint32_t qw1w2 = xive_tctx_word2(&tctx->regs[TM_QW1_OS]); 1202 uint32_t qw0w2 = xive_tctx_word2(&tctx->regs[TM_QW0_USER]); 1203 1204 uint32_t index_mask, vp_mask; 1205 uint8_t block_mask; 1206 1207 if (format == 0) { 1208 /* 1209 * i=0: Specific NVT notification 1210 * i=1: VP-group notification (bits ignored at the end of the 1211 * NVT identifier) 1212 */ 1213 block_mask = xive2_get_vp_block_mask(nvt_blk, crowd); 1214 index_mask = xive2_get_vp_index_mask(nvt_idx, cam_ignore); 1215 vp_mask = xive2_nvp_cam_line(block_mask, index_mask); 1216 1217 /* For VP-group notifications, threads with LGS=0 are excluded */ 1218 1219 /* PHYS ring */ 1220 if ((be32_to_cpu(qw3w2) & TM2_QW3W2_VT) && 1221 !(cam_ignore && tctx->regs[TM_QW3_HV_PHYS + TM_LGS] == 0) && 1222 xive2_vp_match_mask(cam, 1223 xive2_tctx_hw_cam_line(xptr, tctx), 1224 vp_mask)) { 1225 return TM_QW3_HV_PHYS; 1226 } 1227 1228 /* HV POOL ring */ 1229 if ((be32_to_cpu(qw2w2) & TM2_QW2W2_VP) && 1230 !(cam_ignore && tctx->regs[TM_QW2_HV_POOL + TM_LGS] == 0) && 1231 xive2_vp_match_mask(cam, 1232 xive_get_field32(TM2_QW2W2_POOL_CAM, qw2w2), 1233 vp_mask)) { 1234 return TM_QW2_HV_POOL; 1235 } 1236 1237 /* OS ring */ 1238 if ((be32_to_cpu(qw1w2) & TM2_QW1W2_VO) && 1239 !(cam_ignore && tctx->regs[TM_QW1_OS + TM_LGS] == 0) && 1240 xive2_vp_match_mask(cam, 1241 xive_get_field32(TM2_QW1W2_OS_CAM, qw1w2), 1242 vp_mask)) { 1243 return TM_QW1_OS; 1244 } 1245 } else { 1246 /* F=1 : User level Event-Based Branch (EBB) notification */ 1247 1248 /* FIXME: what if cam_ignore and LGS = 0 ? */ 1249 /* USER ring */ 1250 if ((be32_to_cpu(qw1w2) & TM2_QW1W2_VO) && 1251 (cam == xive_get_field32(TM2_QW1W2_OS_CAM, qw1w2)) && 1252 (be32_to_cpu(qw0w2) & TM2_QW0W2_VU) && 1253 (logic_serv == xive_get_field32(TM2_QW0W2_LOGIC_SERV, qw0w2))) { 1254 return TM_QW0_USER; 1255 } 1256 } 1257 return -1; 1258 } 1259 1260 bool xive2_tm_irq_precluded(XiveTCTX *tctx, int ring, uint8_t priority) 1261 { 1262 /* HV_POOL ring uses HV_PHYS NSR, CPPR and PIPR registers */ 1263 uint8_t alt_ring = (ring == TM_QW2_HV_POOL) ? TM_QW3_HV_PHYS : ring; 1264 uint8_t *alt_regs = &tctx->regs[alt_ring]; 1265 1266 /* 1267 * The xive2_presenter_tctx_match() above tells if there's a match 1268 * but for VP-group notification, we still need to look at the 1269 * priority to know if the thread can take the interrupt now or if 1270 * it is precluded. 1271 */ 1272 if (priority < alt_regs[TM_CPPR]) { 1273 return false; 1274 } 1275 return true; 1276 } 1277 1278 void xive2_tm_set_lsmfb(XiveTCTX *tctx, int ring, uint8_t priority) 1279 { 1280 uint8_t *regs = &tctx->regs[ring]; 1281 1282 /* 1283 * Called by the router during a VP-group notification when the 1284 * thread matches but can't take the interrupt because it's 1285 * already running at a more favored priority. It then stores the 1286 * new interrupt priority in the LSMFB field. 1287 */ 1288 regs[TM_LSMFB] = priority; 1289 } 1290 1291 static void xive2_router_realize(DeviceState *dev, Error **errp) 1292 { 1293 Xive2Router *xrtr = XIVE2_ROUTER(dev); 1294 1295 assert(xrtr->xfb); 1296 } 1297 1298 /* 1299 * Notification using the END ESe/ESn bit (Event State Buffer for 1300 * escalation and notification). Profide further coalescing in the 1301 * Router. 1302 */ 1303 static bool xive2_router_end_es_notify(Xive2Router *xrtr, uint8_t end_blk, 1304 uint32_t end_idx, Xive2End *end, 1305 uint32_t end_esmask) 1306 { 1307 uint8_t pq = xive_get_field32(end_esmask, end->w1); 1308 bool notify = xive_esb_trigger(&pq); 1309 1310 if (pq != xive_get_field32(end_esmask, end->w1)) { 1311 end->w1 = xive_set_field32(end_esmask, end->w1, pq); 1312 xive2_router_write_end(xrtr, end_blk, end_idx, end, 1); 1313 } 1314 1315 /* ESe/n[Q]=1 : end of notification */ 1316 return notify; 1317 } 1318 1319 /* 1320 * An END trigger can come from an event trigger (IPI or HW) or from 1321 * another chip. We don't model the PowerBus but the END trigger 1322 * message has the same parameters than in the function below. 1323 */ 1324 static void xive2_router_end_notify(Xive2Router *xrtr, uint8_t end_blk, 1325 uint32_t end_idx, uint32_t end_data) 1326 { 1327 Xive2End end; 1328 uint8_t priority; 1329 uint8_t format; 1330 bool found, precluded; 1331 uint8_t nvx_blk; 1332 uint32_t nvx_idx; 1333 1334 /* END cache lookup */ 1335 if (xive2_router_get_end(xrtr, end_blk, end_idx, &end)) { 1336 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No END %x/%x\n", end_blk, 1337 end_idx); 1338 return; 1339 } 1340 1341 if (!xive2_end_is_valid(&end)) { 1342 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: END %x/%x is invalid\n", 1343 end_blk, end_idx); 1344 return; 1345 } 1346 1347 if (xive2_end_is_crowd(&end) && !xive2_end_is_ignore(&end)) { 1348 qemu_log_mask(LOG_GUEST_ERROR, 1349 "XIVE: invalid END, 'crowd' bit requires 'ignore' bit\n"); 1350 return; 1351 } 1352 1353 if (xive2_end_is_enqueue(&end)) { 1354 xive2_end_enqueue(&end, end_data); 1355 /* Enqueuing event data modifies the EQ toggle and index */ 1356 xive2_router_write_end(xrtr, end_blk, end_idx, &end, 1); 1357 } 1358 1359 /* 1360 * When the END is silent, we skip the notification part. 1361 */ 1362 if (xive2_end_is_silent_escalation(&end)) { 1363 goto do_escalation; 1364 } 1365 1366 /* 1367 * The W7 format depends on the F bit in W6. It defines the type 1368 * of the notification : 1369 * 1370 * F=0 : single or multiple NVP notification 1371 * F=1 : User level Event-Based Branch (EBB) notification, no 1372 * priority 1373 */ 1374 format = xive_get_field32(END2_W6_FORMAT_BIT, end.w6); 1375 priority = xive_get_field32(END2_W7_F0_PRIORITY, end.w7); 1376 1377 /* The END is masked */ 1378 if (format == 0 && priority == 0xff) { 1379 return; 1380 } 1381 1382 /* 1383 * Check the END ESn (Event State Buffer for notification) for 1384 * even further coalescing in the Router 1385 */ 1386 if (!xive2_end_is_notify(&end)) { 1387 /* ESn[Q]=1 : end of notification */ 1388 if (!xive2_router_end_es_notify(xrtr, end_blk, end_idx, 1389 &end, END2_W1_ESn)) { 1390 return; 1391 } 1392 } 1393 1394 /* 1395 * Follows IVPE notification 1396 */ 1397 nvx_blk = xive_get_field32(END2_W6_VP_BLOCK, end.w6); 1398 nvx_idx = xive_get_field32(END2_W6_VP_OFFSET, end.w6); 1399 1400 found = xive_presenter_notify(xrtr->xfb, format, nvx_blk, nvx_idx, 1401 xive2_end_is_crowd(&end), xive2_end_is_ignore(&end), 1402 priority, 1403 xive_get_field32(END2_W7_F1_LOG_SERVER_ID, end.w7), 1404 &precluded); 1405 1406 /* TODO: Auto EOI. */ 1407 1408 if (found) { 1409 return; 1410 } 1411 1412 /* 1413 * If no matching NVP is dispatched on a HW thread : 1414 * - specific VP: update the NVP structure if backlog is activated 1415 * - VP-group: update the backlog counter for that priority in the NVG 1416 */ 1417 if (xive2_end_is_backlog(&end)) { 1418 1419 if (format == 1) { 1420 qemu_log_mask(LOG_GUEST_ERROR, 1421 "XIVE: END %x/%x invalid config: F1 & backlog\n", 1422 end_blk, end_idx); 1423 return; 1424 } 1425 1426 if (!xive2_end_is_ignore(&end)) { 1427 uint8_t ipb; 1428 Xive2Nvp nvp; 1429 1430 /* NVP cache lookup */ 1431 if (xive2_router_get_nvp(xrtr, nvx_blk, nvx_idx, &nvp)) { 1432 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: no NVP %x/%x\n", 1433 nvx_blk, nvx_idx); 1434 return; 1435 } 1436 1437 if (!xive2_nvp_is_valid(&nvp)) { 1438 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: NVP %x/%x is invalid\n", 1439 nvx_blk, nvx_idx); 1440 return; 1441 } 1442 1443 /* 1444 * Record the IPB in the associated NVP structure for later 1445 * use. The presenter will resend the interrupt when the vCPU 1446 * is dispatched again on a HW thread. 1447 */ 1448 ipb = xive_get_field32(NVP2_W2_IPB, nvp.w2) | 1449 xive_priority_to_ipb(priority); 1450 nvp.w2 = xive_set_field32(NVP2_W2_IPB, nvp.w2, ipb); 1451 xive2_router_write_nvp(xrtr, nvx_blk, nvx_idx, &nvp, 2); 1452 } else { 1453 Xive2Nvgc nvgc; 1454 uint32_t backlog; 1455 bool crowd; 1456 1457 crowd = xive2_end_is_crowd(&end); 1458 1459 /* 1460 * For groups and crowds, the per-priority backlog 1461 * counters are stored in the NVG/NVC structures 1462 */ 1463 if (xive2_router_get_nvgc(xrtr, crowd, 1464 nvx_blk, nvx_idx, &nvgc)) { 1465 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: no %s %x/%x\n", 1466 crowd ? "NVC" : "NVG", nvx_blk, nvx_idx); 1467 return; 1468 } 1469 1470 if (!xive2_nvgc_is_valid(&nvgc)) { 1471 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: NVG %x/%x is invalid\n", 1472 nvx_blk, nvx_idx); 1473 return; 1474 } 1475 1476 /* 1477 * Increment the backlog counter for that priority. 1478 * We only call broadcast the first time the counter is 1479 * incremented. broadcast will set the LSMFB field of the TIMA of 1480 * relevant threads so that they know an interrupt is pending. 1481 */ 1482 backlog = xive2_nvgc_get_backlog(&nvgc, priority) + 1; 1483 xive2_nvgc_set_backlog(&nvgc, priority, backlog); 1484 xive2_router_write_nvgc(xrtr, crowd, nvx_blk, nvx_idx, &nvgc); 1485 1486 if (backlog == 1) { 1487 XiveFabricClass *xfc = XIVE_FABRIC_GET_CLASS(xrtr->xfb); 1488 xfc->broadcast(xrtr->xfb, nvx_blk, nvx_idx, 1489 xive2_end_is_crowd(&end), 1490 xive2_end_is_ignore(&end), 1491 priority); 1492 1493 if (!xive2_end_is_precluded_escalation(&end)) { 1494 /* 1495 * The interrupt will be picked up when the 1496 * matching thread lowers its priority level 1497 */ 1498 return; 1499 } 1500 } 1501 } 1502 } 1503 1504 do_escalation: 1505 /* 1506 * If activated, escalate notification using the ESe PQ bits and 1507 * the EAS in w4-5 1508 */ 1509 if (!xive2_end_is_escalate(&end)) { 1510 return; 1511 } 1512 1513 /* 1514 * Check the END ESe (Event State Buffer for escalation) for even 1515 * further coalescing in the Router 1516 */ 1517 if (!xive2_end_is_uncond_escalation(&end)) { 1518 /* ESe[Q]=1 : end of escalation notification */ 1519 if (!xive2_router_end_es_notify(xrtr, end_blk, end_idx, 1520 &end, END2_W1_ESe)) { 1521 return; 1522 } 1523 } 1524 1525 /* 1526 * The END trigger becomes an Escalation trigger 1527 */ 1528 xive2_router_end_notify(xrtr, 1529 xive_get_field32(END2_W4_END_BLOCK, end.w4), 1530 xive_get_field32(END2_W4_ESC_END_INDEX, end.w4), 1531 xive_get_field32(END2_W5_ESC_END_DATA, end.w5)); 1532 } 1533 1534 void xive2_router_notify(XiveNotifier *xn, uint32_t lisn, bool pq_checked) 1535 { 1536 Xive2Router *xrtr = XIVE2_ROUTER(xn); 1537 uint8_t eas_blk = XIVE_EAS_BLOCK(lisn); 1538 uint32_t eas_idx = XIVE_EAS_INDEX(lisn); 1539 Xive2Eas eas; 1540 1541 /* EAS cache lookup */ 1542 if (xive2_router_get_eas(xrtr, eas_blk, eas_idx, &eas)) { 1543 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Unknown LISN %x\n", lisn); 1544 return; 1545 } 1546 1547 if (!pq_checked) { 1548 bool notify; 1549 uint8_t pq; 1550 1551 /* PQ cache lookup */ 1552 if (xive2_router_get_pq(xrtr, eas_blk, eas_idx, &pq)) { 1553 /* Set FIR */ 1554 g_assert_not_reached(); 1555 } 1556 1557 notify = xive_esb_trigger(&pq); 1558 1559 if (xive2_router_set_pq(xrtr, eas_blk, eas_idx, &pq)) { 1560 /* Set FIR */ 1561 g_assert_not_reached(); 1562 } 1563 1564 if (!notify) { 1565 return; 1566 } 1567 } 1568 1569 if (!xive2_eas_is_valid(&eas)) { 1570 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Invalid LISN %x\n", lisn); 1571 return; 1572 } 1573 1574 if (xive2_eas_is_masked(&eas)) { 1575 /* Notification completed */ 1576 return; 1577 } 1578 1579 /* 1580 * The event trigger becomes an END trigger 1581 */ 1582 xive2_router_end_notify(xrtr, 1583 xive_get_field64(EAS2_END_BLOCK, eas.w), 1584 xive_get_field64(EAS2_END_INDEX, eas.w), 1585 xive_get_field64(EAS2_END_DATA, eas.w)); 1586 } 1587 1588 static const Property xive2_router_properties[] = { 1589 DEFINE_PROP_LINK("xive-fabric", Xive2Router, xfb, 1590 TYPE_XIVE_FABRIC, XiveFabric *), 1591 }; 1592 1593 static void xive2_router_class_init(ObjectClass *klass, void *data) 1594 { 1595 DeviceClass *dc = DEVICE_CLASS(klass); 1596 XiveNotifierClass *xnc = XIVE_NOTIFIER_CLASS(klass); 1597 1598 dc->desc = "XIVE2 Router Engine"; 1599 device_class_set_props(dc, xive2_router_properties); 1600 /* Parent is SysBusDeviceClass. No need to call its realize hook */ 1601 dc->realize = xive2_router_realize; 1602 xnc->notify = xive2_router_notify; 1603 } 1604 1605 static const TypeInfo xive2_router_info = { 1606 .name = TYPE_XIVE2_ROUTER, 1607 .parent = TYPE_SYS_BUS_DEVICE, 1608 .abstract = true, 1609 .instance_size = sizeof(Xive2Router), 1610 .class_size = sizeof(Xive2RouterClass), 1611 .class_init = xive2_router_class_init, 1612 .interfaces = (InterfaceInfo[]) { 1613 { TYPE_XIVE_NOTIFIER }, 1614 { TYPE_XIVE_PRESENTER }, 1615 { } 1616 } 1617 }; 1618 1619 static inline bool addr_is_even(hwaddr addr, uint32_t shift) 1620 { 1621 return !((addr >> shift) & 1); 1622 } 1623 1624 static uint64_t xive2_end_source_read(void *opaque, hwaddr addr, unsigned size) 1625 { 1626 Xive2EndSource *xsrc = XIVE2_END_SOURCE(opaque); 1627 uint32_t offset = addr & 0xFFF; 1628 uint8_t end_blk; 1629 uint32_t end_idx; 1630 Xive2End end; 1631 uint32_t end_esmask; 1632 uint8_t pq; 1633 uint64_t ret; 1634 1635 /* 1636 * The block id should be deduced from the load address on the END 1637 * ESB MMIO but our model only supports a single block per XIVE chip. 1638 */ 1639 end_blk = xive2_router_get_block_id(xsrc->xrtr); 1640 end_idx = addr >> (xsrc->esb_shift + 1); 1641 1642 if (xive2_router_get_end(xsrc->xrtr, end_blk, end_idx, &end)) { 1643 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No END %x/%x\n", end_blk, 1644 end_idx); 1645 return -1; 1646 } 1647 1648 if (!xive2_end_is_valid(&end)) { 1649 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: END %x/%x is invalid\n", 1650 end_blk, end_idx); 1651 return -1; 1652 } 1653 1654 end_esmask = addr_is_even(addr, xsrc->esb_shift) ? END2_W1_ESn : 1655 END2_W1_ESe; 1656 pq = xive_get_field32(end_esmask, end.w1); 1657 1658 switch (offset) { 1659 case XIVE_ESB_LOAD_EOI ... XIVE_ESB_LOAD_EOI + 0x7FF: 1660 ret = xive_esb_eoi(&pq); 1661 1662 /* Forward the source event notification for routing ?? */ 1663 break; 1664 1665 case XIVE_ESB_GET ... XIVE_ESB_GET + 0x3FF: 1666 ret = pq; 1667 break; 1668 1669 case XIVE_ESB_SET_PQ_00 ... XIVE_ESB_SET_PQ_00 + 0x0FF: 1670 case XIVE_ESB_SET_PQ_01 ... XIVE_ESB_SET_PQ_01 + 0x0FF: 1671 case XIVE_ESB_SET_PQ_10 ... XIVE_ESB_SET_PQ_10 + 0x0FF: 1672 case XIVE_ESB_SET_PQ_11 ... XIVE_ESB_SET_PQ_11 + 0x0FF: 1673 ret = xive_esb_set(&pq, (offset >> 8) & 0x3); 1674 break; 1675 default: 1676 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: invalid END ESB load addr %d\n", 1677 offset); 1678 return -1; 1679 } 1680 1681 if (pq != xive_get_field32(end_esmask, end.w1)) { 1682 end.w1 = xive_set_field32(end_esmask, end.w1, pq); 1683 xive2_router_write_end(xsrc->xrtr, end_blk, end_idx, &end, 1); 1684 } 1685 1686 return ret; 1687 } 1688 1689 static void xive2_end_source_write(void *opaque, hwaddr addr, 1690 uint64_t value, unsigned size) 1691 { 1692 Xive2EndSource *xsrc = XIVE2_END_SOURCE(opaque); 1693 uint32_t offset = addr & 0xFFF; 1694 uint8_t end_blk; 1695 uint32_t end_idx; 1696 Xive2End end; 1697 uint32_t end_esmask; 1698 uint8_t pq; 1699 bool notify = false; 1700 1701 /* 1702 * The block id should be deduced from the load address on the END 1703 * ESB MMIO but our model only supports a single block per XIVE chip. 1704 */ 1705 end_blk = xive2_router_get_block_id(xsrc->xrtr); 1706 end_idx = addr >> (xsrc->esb_shift + 1); 1707 1708 if (xive2_router_get_end(xsrc->xrtr, end_blk, end_idx, &end)) { 1709 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No END %x/%x\n", end_blk, 1710 end_idx); 1711 return; 1712 } 1713 1714 if (!xive2_end_is_valid(&end)) { 1715 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: END %x/%x is invalid\n", 1716 end_blk, end_idx); 1717 return; 1718 } 1719 1720 end_esmask = addr_is_even(addr, xsrc->esb_shift) ? END2_W1_ESn : 1721 END2_W1_ESe; 1722 pq = xive_get_field32(end_esmask, end.w1); 1723 1724 switch (offset) { 1725 case 0 ... 0x3FF: 1726 notify = xive_esb_trigger(&pq); 1727 break; 1728 1729 case XIVE_ESB_STORE_EOI ... XIVE_ESB_STORE_EOI + 0x3FF: 1730 /* TODO: can we check StoreEOI availability from the router ? */ 1731 notify = xive_esb_eoi(&pq); 1732 break; 1733 1734 case XIVE_ESB_INJECT ... XIVE_ESB_INJECT + 0x3FF: 1735 if (end_esmask == END2_W1_ESe) { 1736 qemu_log_mask(LOG_GUEST_ERROR, 1737 "XIVE: END %x/%x can not EQ inject on ESe\n", 1738 end_blk, end_idx); 1739 return; 1740 } 1741 notify = true; 1742 break; 1743 1744 default: 1745 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: invalid END ESB write addr %d\n", 1746 offset); 1747 return; 1748 } 1749 1750 if (pq != xive_get_field32(end_esmask, end.w1)) { 1751 end.w1 = xive_set_field32(end_esmask, end.w1, pq); 1752 xive2_router_write_end(xsrc->xrtr, end_blk, end_idx, &end, 1); 1753 } 1754 1755 /* TODO: Forward the source event notification for routing */ 1756 if (notify) { 1757 ; 1758 } 1759 } 1760 1761 static const MemoryRegionOps xive2_end_source_ops = { 1762 .read = xive2_end_source_read, 1763 .write = xive2_end_source_write, 1764 .endianness = DEVICE_BIG_ENDIAN, 1765 .valid = { 1766 .min_access_size = 1, 1767 .max_access_size = 8, 1768 }, 1769 .impl = { 1770 .min_access_size = 1, 1771 .max_access_size = 8, 1772 }, 1773 }; 1774 1775 static void xive2_end_source_realize(DeviceState *dev, Error **errp) 1776 { 1777 Xive2EndSource *xsrc = XIVE2_END_SOURCE(dev); 1778 1779 assert(xsrc->xrtr); 1780 1781 if (!xsrc->nr_ends) { 1782 error_setg(errp, "Number of interrupt needs to be greater than 0"); 1783 return; 1784 } 1785 1786 if (xsrc->esb_shift != XIVE_ESB_4K && 1787 xsrc->esb_shift != XIVE_ESB_64K) { 1788 error_setg(errp, "Invalid ESB shift setting"); 1789 return; 1790 } 1791 1792 /* 1793 * Each END is assigned an even/odd pair of MMIO pages, the even page 1794 * manages the ESn field while the odd page manages the ESe field. 1795 */ 1796 memory_region_init_io(&xsrc->esb_mmio, OBJECT(xsrc), 1797 &xive2_end_source_ops, xsrc, "xive.end", 1798 (1ull << (xsrc->esb_shift + 1)) * xsrc->nr_ends); 1799 } 1800 1801 static const Property xive2_end_source_properties[] = { 1802 DEFINE_PROP_UINT32("nr-ends", Xive2EndSource, nr_ends, 0), 1803 DEFINE_PROP_UINT32("shift", Xive2EndSource, esb_shift, XIVE_ESB_64K), 1804 DEFINE_PROP_LINK("xive", Xive2EndSource, xrtr, TYPE_XIVE2_ROUTER, 1805 Xive2Router *), 1806 }; 1807 1808 static void xive2_end_source_class_init(ObjectClass *klass, void *data) 1809 { 1810 DeviceClass *dc = DEVICE_CLASS(klass); 1811 1812 dc->desc = "XIVE END Source"; 1813 device_class_set_props(dc, xive2_end_source_properties); 1814 dc->realize = xive2_end_source_realize; 1815 dc->user_creatable = false; 1816 } 1817 1818 static const TypeInfo xive2_end_source_info = { 1819 .name = TYPE_XIVE2_END_SOURCE, 1820 .parent = TYPE_DEVICE, 1821 .instance_size = sizeof(Xive2EndSource), 1822 .class_init = xive2_end_source_class_init, 1823 }; 1824 1825 static void xive2_register_types(void) 1826 { 1827 type_register_static(&xive2_router_info); 1828 type_register_static(&xive2_end_source_info); 1829 } 1830 1831 type_init(xive2_register_types) 1832