1 /* 2 * QEMU PowerPC XIVE2 interrupt controller model (POWER10) 3 * 4 * Copyright (c) 2019-2022, 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 "target/ppc/cpu.h" 15 #include "sysemu/cpus.h" 16 #include "sysemu/dma.h" 17 #include "hw/qdev-properties.h" 18 #include "monitor/monitor.h" 19 #include "hw/ppc/xive.h" 20 #include "hw/ppc/xive2.h" 21 #include "hw/ppc/xive2_regs.h" 22 23 uint32_t xive2_router_get_config(Xive2Router *xrtr) 24 { 25 Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr); 26 27 return xrc->get_config(xrtr); 28 } 29 30 void xive2_eas_pic_print_info(Xive2Eas *eas, uint32_t lisn, Monitor *mon) 31 { 32 if (!xive2_eas_is_valid(eas)) { 33 return; 34 } 35 36 monitor_printf(mon, " %08x %s end:%02x/%04x data:%08x\n", 37 lisn, xive2_eas_is_masked(eas) ? "M" : " ", 38 (uint8_t) xive_get_field64(EAS2_END_BLOCK, eas->w), 39 (uint32_t) xive_get_field64(EAS2_END_INDEX, eas->w), 40 (uint32_t) xive_get_field64(EAS2_END_DATA, eas->w)); 41 } 42 43 void xive2_end_queue_pic_print_info(Xive2End *end, uint32_t width, 44 Monitor *mon) 45 { 46 uint64_t qaddr_base = xive2_end_qaddr(end); 47 uint32_t qsize = xive_get_field32(END2_W3_QSIZE, end->w3); 48 uint32_t qindex = xive_get_field32(END2_W1_PAGE_OFF, end->w1); 49 uint32_t qentries = 1 << (qsize + 10); 50 int i; 51 52 /* 53 * print out the [ (qindex - (width - 1)) .. (qindex + 1)] window 54 */ 55 monitor_printf(mon, " [ "); 56 qindex = (qindex - (width - 1)) & (qentries - 1); 57 for (i = 0; i < width; i++) { 58 uint64_t qaddr = qaddr_base + (qindex << 2); 59 uint32_t qdata = -1; 60 61 if (dma_memory_read(&address_space_memory, qaddr, &qdata, 62 sizeof(qdata), MEMTXATTRS_UNSPECIFIED)) { 63 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: failed to read EQ @0x%" 64 HWADDR_PRIx "\n", qaddr); 65 return; 66 } 67 monitor_printf(mon, "%s%08x ", i == width - 1 ? "^" : "", 68 be32_to_cpu(qdata)); 69 qindex = (qindex + 1) & (qentries - 1); 70 } 71 monitor_printf(mon, "]"); 72 } 73 74 void xive2_end_pic_print_info(Xive2End *end, uint32_t end_idx, Monitor *mon) 75 { 76 uint64_t qaddr_base = xive2_end_qaddr(end); 77 uint32_t qindex = xive_get_field32(END2_W1_PAGE_OFF, end->w1); 78 uint32_t qgen = xive_get_field32(END2_W1_GENERATION, end->w1); 79 uint32_t qsize = xive_get_field32(END2_W3_QSIZE, end->w3); 80 uint32_t qentries = 1 << (qsize + 10); 81 82 uint32_t nvp_blk = xive_get_field32(END2_W6_VP_BLOCK, end->w6); 83 uint32_t nvp_idx = xive_get_field32(END2_W6_VP_OFFSET, end->w6); 84 uint8_t priority = xive_get_field32(END2_W7_F0_PRIORITY, end->w7); 85 uint8_t pq; 86 87 if (!xive2_end_is_valid(end)) { 88 return; 89 } 90 91 pq = xive_get_field32(END2_W1_ESn, end->w1); 92 93 monitor_printf(mon, 94 " %08x %c%c %c%c%c%c%c%c%c%c%c%c prio:%d nvp:%02x/%04x", 95 end_idx, 96 pq & XIVE_ESB_VAL_P ? 'P' : '-', 97 pq & XIVE_ESB_VAL_Q ? 'Q' : '-', 98 xive2_end_is_valid(end) ? 'v' : '-', 99 xive2_end_is_enqueue(end) ? 'q' : '-', 100 xive2_end_is_notify(end) ? 'n' : '-', 101 xive2_end_is_backlog(end) ? 'b' : '-', 102 xive2_end_is_escalate(end) ? 'e' : '-', 103 xive2_end_is_escalate_end(end) ? 'N' : '-', 104 xive2_end_is_uncond_escalation(end) ? 'u' : '-', 105 xive2_end_is_silent_escalation(end) ? 's' : '-', 106 xive2_end_is_firmware1(end) ? 'f' : '-', 107 xive2_end_is_firmware2(end) ? 'F' : '-', 108 priority, nvp_blk, nvp_idx); 109 110 if (qaddr_base) { 111 monitor_printf(mon, " eq:@%08"PRIx64"% 6d/%5d ^%d", 112 qaddr_base, qindex, qentries, qgen); 113 xive2_end_queue_pic_print_info(end, 6, mon); 114 } 115 monitor_printf(mon, "\n"); 116 } 117 118 void xive2_end_eas_pic_print_info(Xive2End *end, uint32_t end_idx, 119 Monitor *mon) 120 { 121 Xive2Eas *eas = (Xive2Eas *) &end->w4; 122 uint8_t pq; 123 124 if (!xive2_end_is_escalate(end)) { 125 return; 126 } 127 128 pq = xive_get_field32(END2_W1_ESe, end->w1); 129 130 monitor_printf(mon, " %08x %c%c %c%c end:%02x/%04x data:%08x\n", 131 end_idx, 132 pq & XIVE_ESB_VAL_P ? 'P' : '-', 133 pq & XIVE_ESB_VAL_Q ? 'Q' : '-', 134 xive2_eas_is_valid(eas) ? 'v' : ' ', 135 xive2_eas_is_masked(eas) ? 'M' : ' ', 136 (uint8_t) xive_get_field64(EAS2_END_BLOCK, eas->w), 137 (uint32_t) xive_get_field64(EAS2_END_INDEX, eas->w), 138 (uint32_t) xive_get_field64(EAS2_END_DATA, eas->w)); 139 } 140 141 static void xive2_end_enqueue(Xive2End *end, uint32_t data) 142 { 143 uint64_t qaddr_base = xive2_end_qaddr(end); 144 uint32_t qsize = xive_get_field32(END2_W3_QSIZE, end->w3); 145 uint32_t qindex = xive_get_field32(END2_W1_PAGE_OFF, end->w1); 146 uint32_t qgen = xive_get_field32(END2_W1_GENERATION, end->w1); 147 148 uint64_t qaddr = qaddr_base + (qindex << 2); 149 uint32_t qdata = cpu_to_be32((qgen << 31) | (data & 0x7fffffff)); 150 uint32_t qentries = 1 << (qsize + 10); 151 152 if (dma_memory_write(&address_space_memory, qaddr, &qdata, sizeof(qdata), 153 MEMTXATTRS_UNSPECIFIED)) { 154 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: failed to write END data @0x%" 155 HWADDR_PRIx "\n", qaddr); 156 return; 157 } 158 159 qindex = (qindex + 1) & (qentries - 1); 160 if (qindex == 0) { 161 qgen ^= 1; 162 end->w1 = xive_set_field32(END2_W1_GENERATION, end->w1, qgen); 163 164 /* TODO(PowerNV): reset GF bit on a cache watch operation */ 165 end->w1 = xive_set_field32(END2_W1_GEN_FLIPPED, end->w1, qgen); 166 } 167 end->w1 = xive_set_field32(END2_W1_PAGE_OFF, end->w1, qindex); 168 } 169 170 /* 171 * XIVE Thread Interrupt Management Area (TIMA) - Gen2 mode 172 * 173 * TIMA Gen2 VP “save & restore” (S&R) indicated by H bit next to V bit 174 * 175 * - if a context is enabled with the H bit set, the VP context 176 * information is retrieved from the NVP structure (“check out”) 177 * and stored back on a context pull (“check in”), the SW receives 178 * the same context pull information as on P9 179 * 180 * - the H bit cannot be changed while the V bit is set, i.e. a 181 * context cannot be set up in the TIMA and then be “pushed” into 182 * the NVP by changing the H bit while the context is enabled 183 */ 184 185 static void xive2_tctx_save_os_ctx(Xive2Router *xrtr, XiveTCTX *tctx, 186 uint8_t nvp_blk, uint32_t nvp_idx) 187 { 188 CPUPPCState *env = &POWERPC_CPU(tctx->cs)->env; 189 uint32_t pir = env->spr_cb[SPR_PIR].default_value; 190 Xive2Nvp nvp; 191 uint8_t *regs = &tctx->regs[TM_QW1_OS]; 192 193 if (xive2_router_get_nvp(xrtr, nvp_blk, nvp_idx, &nvp)) { 194 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No NVP %x/%x\n", 195 nvp_blk, nvp_idx); 196 return; 197 } 198 199 if (!xive2_nvp_is_valid(&nvp)) { 200 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: invalid NVP %x/%x\n", 201 nvp_blk, nvp_idx); 202 return; 203 } 204 205 if (!xive2_nvp_is_hw(&nvp)) { 206 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: NVP %x/%x is not HW owned\n", 207 nvp_blk, nvp_idx); 208 return; 209 } 210 211 if (!xive2_nvp_is_co(&nvp)) { 212 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: NVP %x/%x is not checkout\n", 213 nvp_blk, nvp_idx); 214 return; 215 } 216 217 if (xive_get_field32(NVP2_W1_CO_THRID_VALID, nvp.w1) && 218 xive_get_field32(NVP2_W1_CO_THRID, nvp.w1) != pir) { 219 qemu_log_mask(LOG_GUEST_ERROR, 220 "XIVE: NVP %x/%x invalid checkout Thread %x\n", 221 nvp_blk, nvp_idx, pir); 222 return; 223 } 224 225 nvp.w2 = xive_set_field32(NVP2_W2_IPB, nvp.w2, regs[TM_IPB]); 226 nvp.w2 = xive_set_field32(NVP2_W2_CPPR, nvp.w2, regs[TM_CPPR]); 227 nvp.w2 = xive_set_field32(NVP2_W2_LSMFB, nvp.w2, regs[TM_LSMFB]); 228 xive2_router_write_nvp(xrtr, nvp_blk, nvp_idx, &nvp, 2); 229 230 nvp.w1 = xive_set_field32(NVP2_W1_CO, nvp.w1, 0); 231 /* NVP2_W1_CO_THRID_VALID only set once */ 232 nvp.w1 = xive_set_field32(NVP2_W1_CO_THRID, nvp.w1, 0xFFFF); 233 xive2_router_write_nvp(xrtr, nvp_blk, nvp_idx, &nvp, 1); 234 } 235 236 static void xive2_os_cam_decode(uint32_t cam, uint8_t *nvp_blk, 237 uint32_t *nvp_idx, bool *vo, bool *ho) 238 { 239 *nvp_blk = xive2_nvp_blk(cam); 240 *nvp_idx = xive2_nvp_idx(cam); 241 *vo = !!(cam & TM2_QW1W2_VO); 242 *ho = !!(cam & TM2_QW1W2_HO); 243 } 244 245 uint64_t xive2_tm_pull_os_ctx(XivePresenter *xptr, XiveTCTX *tctx, 246 hwaddr offset, unsigned size) 247 { 248 Xive2Router *xrtr = XIVE2_ROUTER(xptr); 249 uint32_t qw1w2 = xive_tctx_word2(&tctx->regs[TM_QW1_OS]); 250 uint32_t qw1w2_new; 251 uint32_t cam = be32_to_cpu(qw1w2); 252 uint8_t nvp_blk; 253 uint32_t nvp_idx; 254 bool vo; 255 bool do_save; 256 257 xive2_os_cam_decode(cam, &nvp_blk, &nvp_idx, &vo, &do_save); 258 259 if (!vo) { 260 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: pulling invalid NVP %x/%x !?\n", 261 nvp_blk, nvp_idx); 262 } 263 264 /* Invalidate CAM line */ 265 qw1w2_new = xive_set_field32(TM2_QW1W2_VO, qw1w2, 0); 266 memcpy(&tctx->regs[TM_QW1_OS + TM_WORD2], &qw1w2_new, 4); 267 268 if (xive2_router_get_config(xrtr) & XIVE2_VP_SAVE_RESTORE && do_save) { 269 xive2_tctx_save_os_ctx(xrtr, tctx, nvp_blk, nvp_idx); 270 } 271 272 xive_tctx_reset_os_signal(tctx); 273 return qw1w2; 274 } 275 276 static uint8_t xive2_tctx_restore_os_ctx(Xive2Router *xrtr, XiveTCTX *tctx, 277 uint8_t nvp_blk, uint32_t nvp_idx, 278 Xive2Nvp *nvp) 279 { 280 CPUPPCState *env = &POWERPC_CPU(tctx->cs)->env; 281 uint32_t pir = env->spr_cb[SPR_PIR].default_value; 282 uint8_t cppr; 283 284 if (!xive2_nvp_is_hw(nvp)) { 285 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: NVP %x/%x is not HW owned\n", 286 nvp_blk, nvp_idx); 287 return 0; 288 } 289 290 cppr = xive_get_field32(NVP2_W2_CPPR, nvp->w2); 291 nvp->w2 = xive_set_field32(NVP2_W2_CPPR, nvp->w2, 0); 292 xive2_router_write_nvp(xrtr, nvp_blk, nvp_idx, nvp, 2); 293 294 tctx->regs[TM_QW1_OS + TM_CPPR] = cppr; 295 /* we don't model LSMFB */ 296 297 nvp->w1 = xive_set_field32(NVP2_W1_CO, nvp->w1, 1); 298 nvp->w1 = xive_set_field32(NVP2_W1_CO_THRID_VALID, nvp->w1, 1); 299 nvp->w1 = xive_set_field32(NVP2_W1_CO_THRID, nvp->w1, pir); 300 301 /* 302 * Checkout privilege: 0:OS, 1:Pool, 2:Hard 303 * 304 * TODO: we only support OS push/pull 305 */ 306 nvp->w1 = xive_set_field32(NVP2_W1_CO_PRIV, nvp->w1, 0); 307 308 xive2_router_write_nvp(xrtr, nvp_blk, nvp_idx, nvp, 1); 309 310 /* return restored CPPR to generate a CPU exception if needed */ 311 return cppr; 312 } 313 314 static void xive2_tctx_need_resend(Xive2Router *xrtr, XiveTCTX *tctx, 315 uint8_t nvp_blk, uint32_t nvp_idx, 316 bool do_restore) 317 { 318 Xive2Nvp nvp; 319 uint8_t ipb; 320 321 /* 322 * Grab the associated thread interrupt context registers in the 323 * associated NVP 324 */ 325 if (xive2_router_get_nvp(xrtr, nvp_blk, nvp_idx, &nvp)) { 326 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No NVP %x/%x\n", 327 nvp_blk, nvp_idx); 328 return; 329 } 330 331 if (!xive2_nvp_is_valid(&nvp)) { 332 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: invalid NVP %x/%x\n", 333 nvp_blk, nvp_idx); 334 return; 335 } 336 337 /* Automatically restore thread context registers */ 338 if (xive2_router_get_config(xrtr) & XIVE2_VP_SAVE_RESTORE && 339 do_restore) { 340 xive2_tctx_restore_os_ctx(xrtr, tctx, nvp_blk, nvp_idx, &nvp); 341 } 342 343 ipb = xive_get_field32(NVP2_W2_IPB, nvp.w2); 344 if (ipb) { 345 nvp.w2 = xive_set_field32(NVP2_W2_IPB, nvp.w2, 0); 346 xive2_router_write_nvp(xrtr, nvp_blk, nvp_idx, &nvp, 2); 347 } 348 /* 349 * Always call xive_tctx_ipb_update(). Even if there were no 350 * escalation triggered, there could be a pending interrupt which 351 * was saved when the context was pulled and that we need to take 352 * into account by recalculating the PIPR (which is not 353 * saved/restored). 354 * It will also raise the External interrupt signal if needed. 355 */ 356 xive_tctx_ipb_update(tctx, TM_QW1_OS, ipb); 357 } 358 359 /* 360 * Updating the OS CAM line can trigger a resend of interrupt 361 */ 362 void xive2_tm_push_os_ctx(XivePresenter *xptr, XiveTCTX *tctx, 363 hwaddr offset, uint64_t value, unsigned size) 364 { 365 uint32_t cam = value; 366 uint32_t qw1w2 = cpu_to_be32(cam); 367 uint8_t nvp_blk; 368 uint32_t nvp_idx; 369 bool vo; 370 bool do_restore; 371 372 xive2_os_cam_decode(cam, &nvp_blk, &nvp_idx, &vo, &do_restore); 373 374 /* First update the thead context */ 375 memcpy(&tctx->regs[TM_QW1_OS + TM_WORD2], &qw1w2, 4); 376 377 /* Check the interrupt pending bits */ 378 if (vo) { 379 xive2_tctx_need_resend(XIVE2_ROUTER(xptr), tctx, nvp_blk, nvp_idx, 380 do_restore); 381 } 382 } 383 384 /* 385 * XIVE Router (aka. Virtualization Controller or IVRE) 386 */ 387 388 int xive2_router_get_eas(Xive2Router *xrtr, uint8_t eas_blk, uint32_t eas_idx, 389 Xive2Eas *eas) 390 { 391 Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr); 392 393 return xrc->get_eas(xrtr, eas_blk, eas_idx, eas); 394 } 395 396 static 397 int xive2_router_get_pq(Xive2Router *xrtr, uint8_t eas_blk, uint32_t eas_idx, 398 uint8_t *pq) 399 { 400 Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr); 401 402 return xrc->get_pq(xrtr, eas_blk, eas_idx, pq); 403 } 404 405 static 406 int xive2_router_set_pq(Xive2Router *xrtr, uint8_t eas_blk, uint32_t eas_idx, 407 uint8_t *pq) 408 { 409 Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr); 410 411 return xrc->set_pq(xrtr, eas_blk, eas_idx, pq); 412 } 413 414 int xive2_router_get_end(Xive2Router *xrtr, uint8_t end_blk, uint32_t end_idx, 415 Xive2End *end) 416 { 417 Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr); 418 419 return xrc->get_end(xrtr, end_blk, end_idx, end); 420 } 421 422 int xive2_router_write_end(Xive2Router *xrtr, uint8_t end_blk, uint32_t end_idx, 423 Xive2End *end, uint8_t word_number) 424 { 425 Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr); 426 427 return xrc->write_end(xrtr, end_blk, end_idx, end, word_number); 428 } 429 430 int xive2_router_get_nvp(Xive2Router *xrtr, uint8_t nvp_blk, uint32_t nvp_idx, 431 Xive2Nvp *nvp) 432 { 433 Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr); 434 435 return xrc->get_nvp(xrtr, nvp_blk, nvp_idx, nvp); 436 } 437 438 int xive2_router_write_nvp(Xive2Router *xrtr, uint8_t nvp_blk, uint32_t nvp_idx, 439 Xive2Nvp *nvp, uint8_t word_number) 440 { 441 Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr); 442 443 return xrc->write_nvp(xrtr, nvp_blk, nvp_idx, nvp, word_number); 444 } 445 446 static int xive2_router_get_block_id(Xive2Router *xrtr) 447 { 448 Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr); 449 450 return xrc->get_block_id(xrtr); 451 } 452 453 /* 454 * Encode the HW CAM line with 7bit or 8bit thread id. The thread id 455 * width and block id width is configurable at the IC level. 456 * 457 * chipid << 24 | 0000 0000 0000 0000 1 threadid (7Bit) 458 * chipid << 24 | 0000 0000 0000 0001 threadid (8Bit) 459 */ 460 static uint32_t xive2_tctx_hw_cam_line(XivePresenter *xptr, XiveTCTX *tctx) 461 { 462 Xive2Router *xrtr = XIVE2_ROUTER(xptr); 463 CPUPPCState *env = &POWERPC_CPU(tctx->cs)->env; 464 uint32_t pir = env->spr_cb[SPR_PIR].default_value; 465 uint8_t blk = xive2_router_get_block_id(xrtr); 466 uint8_t tid_shift = 467 xive2_router_get_config(xrtr) & XIVE2_THREADID_8BITS ? 8 : 7; 468 uint8_t tid_mask = (1 << tid_shift) - 1; 469 470 return xive2_nvp_cam_line(blk, 1 << tid_shift | (pir & tid_mask)); 471 } 472 473 /* 474 * The thread context register words are in big-endian format. 475 */ 476 int xive2_presenter_tctx_match(XivePresenter *xptr, XiveTCTX *tctx, 477 uint8_t format, 478 uint8_t nvt_blk, uint32_t nvt_idx, 479 bool cam_ignore, uint32_t logic_serv) 480 { 481 uint32_t cam = xive2_nvp_cam_line(nvt_blk, nvt_idx); 482 uint32_t qw3w2 = xive_tctx_word2(&tctx->regs[TM_QW3_HV_PHYS]); 483 uint32_t qw2w2 = xive_tctx_word2(&tctx->regs[TM_QW2_HV_POOL]); 484 uint32_t qw1w2 = xive_tctx_word2(&tctx->regs[TM_QW1_OS]); 485 uint32_t qw0w2 = xive_tctx_word2(&tctx->regs[TM_QW0_USER]); 486 487 /* 488 * TODO (PowerNV): ignore mode. The low order bits of the NVT 489 * identifier are ignored in the "CAM" match. 490 */ 491 492 if (format == 0) { 493 if (cam_ignore == true) { 494 /* 495 * F=0 & i=1: Logical server notification (bits ignored at 496 * the end of the NVT identifier) 497 */ 498 qemu_log_mask(LOG_UNIMP, "XIVE: no support for LS NVT %x/%x\n", 499 nvt_blk, nvt_idx); 500 return -1; 501 } 502 503 /* F=0 & i=0: Specific NVT notification */ 504 505 /* PHYS ring */ 506 if ((be32_to_cpu(qw3w2) & TM2_QW3W2_VT) && 507 cam == xive2_tctx_hw_cam_line(xptr, tctx)) { 508 return TM_QW3_HV_PHYS; 509 } 510 511 /* HV POOL ring */ 512 if ((be32_to_cpu(qw2w2) & TM2_QW2W2_VP) && 513 cam == xive_get_field32(TM2_QW2W2_POOL_CAM, qw2w2)) { 514 return TM_QW2_HV_POOL; 515 } 516 517 /* OS ring */ 518 if ((be32_to_cpu(qw1w2) & TM2_QW1W2_VO) && 519 cam == xive_get_field32(TM2_QW1W2_OS_CAM, qw1w2)) { 520 return TM_QW1_OS; 521 } 522 } else { 523 /* F=1 : User level Event-Based Branch (EBB) notification */ 524 525 /* USER ring */ 526 if ((be32_to_cpu(qw1w2) & TM2_QW1W2_VO) && 527 (cam == xive_get_field32(TM2_QW1W2_OS_CAM, qw1w2)) && 528 (be32_to_cpu(qw0w2) & TM2_QW0W2_VU) && 529 (logic_serv == xive_get_field32(TM2_QW0W2_LOGIC_SERV, qw0w2))) { 530 return TM_QW0_USER; 531 } 532 } 533 return -1; 534 } 535 536 static void xive2_router_realize(DeviceState *dev, Error **errp) 537 { 538 Xive2Router *xrtr = XIVE2_ROUTER(dev); 539 540 assert(xrtr->xfb); 541 } 542 543 /* 544 * Notification using the END ESe/ESn bit (Event State Buffer for 545 * escalation and notification). Profide futher coalescing in the 546 * Router. 547 */ 548 static bool xive2_router_end_es_notify(Xive2Router *xrtr, uint8_t end_blk, 549 uint32_t end_idx, Xive2End *end, 550 uint32_t end_esmask) 551 { 552 uint8_t pq = xive_get_field32(end_esmask, end->w1); 553 bool notify = xive_esb_trigger(&pq); 554 555 if (pq != xive_get_field32(end_esmask, end->w1)) { 556 end->w1 = xive_set_field32(end_esmask, end->w1, pq); 557 xive2_router_write_end(xrtr, end_blk, end_idx, end, 1); 558 } 559 560 /* ESe/n[Q]=1 : end of notification */ 561 return notify; 562 } 563 564 /* 565 * An END trigger can come from an event trigger (IPI or HW) or from 566 * another chip. We don't model the PowerBus but the END trigger 567 * message has the same parameters than in the function below. 568 */ 569 static void xive2_router_end_notify(Xive2Router *xrtr, uint8_t end_blk, 570 uint32_t end_idx, uint32_t end_data) 571 { 572 Xive2End end; 573 uint8_t priority; 574 uint8_t format; 575 bool found; 576 Xive2Nvp nvp; 577 uint8_t nvp_blk; 578 uint32_t nvp_idx; 579 580 /* END cache lookup */ 581 if (xive2_router_get_end(xrtr, end_blk, end_idx, &end)) { 582 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No END %x/%x\n", end_blk, 583 end_idx); 584 return; 585 } 586 587 if (!xive2_end_is_valid(&end)) { 588 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: END %x/%x is invalid\n", 589 end_blk, end_idx); 590 return; 591 } 592 593 if (xive2_end_is_enqueue(&end)) { 594 xive2_end_enqueue(&end, end_data); 595 /* Enqueuing event data modifies the EQ toggle and index */ 596 xive2_router_write_end(xrtr, end_blk, end_idx, &end, 1); 597 } 598 599 /* 600 * When the END is silent, we skip the notification part. 601 */ 602 if (xive2_end_is_silent_escalation(&end)) { 603 goto do_escalation; 604 } 605 606 /* 607 * The W7 format depends on the F bit in W6. It defines the type 608 * of the notification : 609 * 610 * F=0 : single or multiple NVP notification 611 * F=1 : User level Event-Based Branch (EBB) notification, no 612 * priority 613 */ 614 format = xive_get_field32(END2_W6_FORMAT_BIT, end.w6); 615 priority = xive_get_field32(END2_W7_F0_PRIORITY, end.w7); 616 617 /* The END is masked */ 618 if (format == 0 && priority == 0xff) { 619 return; 620 } 621 622 /* 623 * Check the END ESn (Event State Buffer for notification) for 624 * even futher coalescing in the Router 625 */ 626 if (!xive2_end_is_notify(&end)) { 627 /* ESn[Q]=1 : end of notification */ 628 if (!xive2_router_end_es_notify(xrtr, end_blk, end_idx, 629 &end, END2_W1_ESn)) { 630 return; 631 } 632 } 633 634 /* 635 * Follows IVPE notification 636 */ 637 nvp_blk = xive_get_field32(END2_W6_VP_BLOCK, end.w6); 638 nvp_idx = xive_get_field32(END2_W6_VP_OFFSET, end.w6); 639 640 /* NVP cache lookup */ 641 if (xive2_router_get_nvp(xrtr, nvp_blk, nvp_idx, &nvp)) { 642 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: no NVP %x/%x\n", 643 nvp_blk, nvp_idx); 644 return; 645 } 646 647 if (!xive2_nvp_is_valid(&nvp)) { 648 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: NVP %x/%x is invalid\n", 649 nvp_blk, nvp_idx); 650 return; 651 } 652 653 found = xive_presenter_notify(xrtr->xfb, format, nvp_blk, nvp_idx, 654 xive_get_field32(END2_W6_IGNORE, end.w7), 655 priority, 656 xive_get_field32(END2_W7_F1_LOG_SERVER_ID, end.w7)); 657 658 /* TODO: Auto EOI. */ 659 660 if (found) { 661 return; 662 } 663 664 /* 665 * If no matching NVP is dispatched on a HW thread : 666 * - specific VP: update the NVP structure if backlog is activated 667 * - logical server : forward request to IVPE (not supported) 668 */ 669 if (xive2_end_is_backlog(&end)) { 670 uint8_t ipb; 671 672 if (format == 1) { 673 qemu_log_mask(LOG_GUEST_ERROR, 674 "XIVE: END %x/%x invalid config: F1 & backlog\n", 675 end_blk, end_idx); 676 return; 677 } 678 679 /* 680 * Record the IPB in the associated NVP structure for later 681 * use. The presenter will resend the interrupt when the vCPU 682 * is dispatched again on a HW thread. 683 */ 684 ipb = xive_get_field32(NVP2_W2_IPB, nvp.w2) | 685 xive_priority_to_ipb(priority); 686 nvp.w2 = xive_set_field32(NVP2_W2_IPB, nvp.w2, ipb); 687 xive2_router_write_nvp(xrtr, nvp_blk, nvp_idx, &nvp, 2); 688 689 /* 690 * On HW, follows a "Broadcast Backlog" to IVPEs 691 */ 692 } 693 694 do_escalation: 695 /* 696 * If activated, escalate notification using the ESe PQ bits and 697 * the EAS in w4-5 698 */ 699 if (!xive2_end_is_escalate(&end)) { 700 return; 701 } 702 703 /* 704 * Check the END ESe (Event State Buffer for escalation) for even 705 * futher coalescing in the Router 706 */ 707 if (!xive2_end_is_uncond_escalation(&end)) { 708 /* ESe[Q]=1 : end of escalation notification */ 709 if (!xive2_router_end_es_notify(xrtr, end_blk, end_idx, 710 &end, END2_W1_ESe)) { 711 return; 712 } 713 } 714 715 /* 716 * The END trigger becomes an Escalation trigger 717 */ 718 xive2_router_end_notify(xrtr, 719 xive_get_field32(END2_W4_END_BLOCK, end.w4), 720 xive_get_field32(END2_W4_ESC_END_INDEX, end.w4), 721 xive_get_field32(END2_W5_ESC_END_DATA, end.w5)); 722 } 723 724 void xive2_router_notify(XiveNotifier *xn, uint32_t lisn, bool pq_checked) 725 { 726 Xive2Router *xrtr = XIVE2_ROUTER(xn); 727 uint8_t eas_blk = XIVE_EAS_BLOCK(lisn); 728 uint32_t eas_idx = XIVE_EAS_INDEX(lisn); 729 Xive2Eas eas; 730 731 /* EAS cache lookup */ 732 if (xive2_router_get_eas(xrtr, eas_blk, eas_idx, &eas)) { 733 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Unknown LISN %x\n", lisn); 734 return; 735 } 736 737 if (!pq_checked) { 738 bool notify; 739 uint8_t pq; 740 741 /* PQ cache lookup */ 742 if (xive2_router_get_pq(xrtr, eas_blk, eas_idx, &pq)) { 743 /* Set FIR */ 744 g_assert_not_reached(); 745 } 746 747 notify = xive_esb_trigger(&pq); 748 749 if (xive2_router_set_pq(xrtr, eas_blk, eas_idx, &pq)) { 750 /* Set FIR */ 751 g_assert_not_reached(); 752 } 753 754 if (!notify) { 755 return; 756 } 757 } 758 759 if (!xive2_eas_is_valid(&eas)) { 760 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Invalid LISN %x\n", lisn); 761 return; 762 } 763 764 if (xive2_eas_is_masked(&eas)) { 765 /* Notification completed */ 766 return; 767 } 768 769 /* 770 * The event trigger becomes an END trigger 771 */ 772 xive2_router_end_notify(xrtr, 773 xive_get_field64(EAS2_END_BLOCK, eas.w), 774 xive_get_field64(EAS2_END_INDEX, eas.w), 775 xive_get_field64(EAS2_END_DATA, eas.w)); 776 } 777 778 static Property xive2_router_properties[] = { 779 DEFINE_PROP_LINK("xive-fabric", Xive2Router, xfb, 780 TYPE_XIVE_FABRIC, XiveFabric *), 781 DEFINE_PROP_END_OF_LIST(), 782 }; 783 784 static void xive2_router_class_init(ObjectClass *klass, void *data) 785 { 786 DeviceClass *dc = DEVICE_CLASS(klass); 787 XiveNotifierClass *xnc = XIVE_NOTIFIER_CLASS(klass); 788 789 dc->desc = "XIVE2 Router Engine"; 790 device_class_set_props(dc, xive2_router_properties); 791 /* Parent is SysBusDeviceClass. No need to call its realize hook */ 792 dc->realize = xive2_router_realize; 793 xnc->notify = xive2_router_notify; 794 } 795 796 static const TypeInfo xive2_router_info = { 797 .name = TYPE_XIVE2_ROUTER, 798 .parent = TYPE_SYS_BUS_DEVICE, 799 .abstract = true, 800 .instance_size = sizeof(Xive2Router), 801 .class_size = sizeof(Xive2RouterClass), 802 .class_init = xive2_router_class_init, 803 .interfaces = (InterfaceInfo[]) { 804 { TYPE_XIVE_NOTIFIER }, 805 { TYPE_XIVE_PRESENTER }, 806 { } 807 } 808 }; 809 810 static inline bool addr_is_even(hwaddr addr, uint32_t shift) 811 { 812 return !((addr >> shift) & 1); 813 } 814 815 static uint64_t xive2_end_source_read(void *opaque, hwaddr addr, unsigned size) 816 { 817 Xive2EndSource *xsrc = XIVE2_END_SOURCE(opaque); 818 uint32_t offset = addr & 0xFFF; 819 uint8_t end_blk; 820 uint32_t end_idx; 821 Xive2End end; 822 uint32_t end_esmask; 823 uint8_t pq; 824 uint64_t ret; 825 826 /* 827 * The block id should be deduced from the load address on the END 828 * ESB MMIO but our model only supports a single block per XIVE chip. 829 */ 830 end_blk = xive2_router_get_block_id(xsrc->xrtr); 831 end_idx = addr >> (xsrc->esb_shift + 1); 832 833 if (xive2_router_get_end(xsrc->xrtr, end_blk, end_idx, &end)) { 834 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No END %x/%x\n", end_blk, 835 end_idx); 836 return -1; 837 } 838 839 if (!xive2_end_is_valid(&end)) { 840 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: END %x/%x is invalid\n", 841 end_blk, end_idx); 842 return -1; 843 } 844 845 end_esmask = addr_is_even(addr, xsrc->esb_shift) ? END2_W1_ESn : 846 END2_W1_ESe; 847 pq = xive_get_field32(end_esmask, end.w1); 848 849 switch (offset) { 850 case XIVE_ESB_LOAD_EOI ... XIVE_ESB_LOAD_EOI + 0x7FF: 851 ret = xive_esb_eoi(&pq); 852 853 /* Forward the source event notification for routing ?? */ 854 break; 855 856 case XIVE_ESB_GET ... XIVE_ESB_GET + 0x3FF: 857 ret = pq; 858 break; 859 860 case XIVE_ESB_SET_PQ_00 ... XIVE_ESB_SET_PQ_00 + 0x0FF: 861 case XIVE_ESB_SET_PQ_01 ... XIVE_ESB_SET_PQ_01 + 0x0FF: 862 case XIVE_ESB_SET_PQ_10 ... XIVE_ESB_SET_PQ_10 + 0x0FF: 863 case XIVE_ESB_SET_PQ_11 ... XIVE_ESB_SET_PQ_11 + 0x0FF: 864 ret = xive_esb_set(&pq, (offset >> 8) & 0x3); 865 break; 866 default: 867 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: invalid END ESB load addr %d\n", 868 offset); 869 return -1; 870 } 871 872 if (pq != xive_get_field32(end_esmask, end.w1)) { 873 end.w1 = xive_set_field32(end_esmask, end.w1, pq); 874 xive2_router_write_end(xsrc->xrtr, end_blk, end_idx, &end, 1); 875 } 876 877 return ret; 878 } 879 880 static void xive2_end_source_write(void *opaque, hwaddr addr, 881 uint64_t value, unsigned size) 882 { 883 Xive2EndSource *xsrc = XIVE2_END_SOURCE(opaque); 884 uint32_t offset = addr & 0xFFF; 885 uint8_t end_blk; 886 uint32_t end_idx; 887 Xive2End end; 888 uint32_t end_esmask; 889 uint8_t pq; 890 bool notify = false; 891 892 /* 893 * The block id should be deduced from the load address on the END 894 * ESB MMIO but our model only supports a single block per XIVE chip. 895 */ 896 end_blk = xive2_router_get_block_id(xsrc->xrtr); 897 end_idx = addr >> (xsrc->esb_shift + 1); 898 899 if (xive2_router_get_end(xsrc->xrtr, end_blk, end_idx, &end)) { 900 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No END %x/%x\n", end_blk, 901 end_idx); 902 return; 903 } 904 905 if (!xive2_end_is_valid(&end)) { 906 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: END %x/%x is invalid\n", 907 end_blk, end_idx); 908 return; 909 } 910 911 end_esmask = addr_is_even(addr, xsrc->esb_shift) ? END2_W1_ESn : 912 END2_W1_ESe; 913 pq = xive_get_field32(end_esmask, end.w1); 914 915 switch (offset) { 916 case 0 ... 0x3FF: 917 notify = xive_esb_trigger(&pq); 918 break; 919 920 case XIVE_ESB_STORE_EOI ... XIVE_ESB_STORE_EOI + 0x3FF: 921 /* TODO: can we check StoreEOI availability from the router ? */ 922 notify = xive_esb_eoi(&pq); 923 break; 924 925 case XIVE_ESB_INJECT ... XIVE_ESB_INJECT + 0x3FF: 926 if (end_esmask == END2_W1_ESe) { 927 qemu_log_mask(LOG_GUEST_ERROR, 928 "XIVE: END %x/%x can not EQ inject on ESe\n", 929 end_blk, end_idx); 930 return; 931 } 932 notify = true; 933 break; 934 935 default: 936 qemu_log_mask(LOG_GUEST_ERROR, "XIVE: invalid END ESB write addr %d\n", 937 offset); 938 return; 939 } 940 941 if (pq != xive_get_field32(end_esmask, end.w1)) { 942 end.w1 = xive_set_field32(end_esmask, end.w1, pq); 943 xive2_router_write_end(xsrc->xrtr, end_blk, end_idx, &end, 1); 944 } 945 946 /* TODO: Forward the source event notification for routing */ 947 if (notify) { 948 ; 949 } 950 } 951 952 static const MemoryRegionOps xive2_end_source_ops = { 953 .read = xive2_end_source_read, 954 .write = xive2_end_source_write, 955 .endianness = DEVICE_BIG_ENDIAN, 956 .valid = { 957 .min_access_size = 1, 958 .max_access_size = 8, 959 }, 960 .impl = { 961 .min_access_size = 1, 962 .max_access_size = 8, 963 }, 964 }; 965 966 static void xive2_end_source_realize(DeviceState *dev, Error **errp) 967 { 968 Xive2EndSource *xsrc = XIVE2_END_SOURCE(dev); 969 970 assert(xsrc->xrtr); 971 972 if (!xsrc->nr_ends) { 973 error_setg(errp, "Number of interrupt needs to be greater than 0"); 974 return; 975 } 976 977 if (xsrc->esb_shift != XIVE_ESB_4K && 978 xsrc->esb_shift != XIVE_ESB_64K) { 979 error_setg(errp, "Invalid ESB shift setting"); 980 return; 981 } 982 983 /* 984 * Each END is assigned an even/odd pair of MMIO pages, the even page 985 * manages the ESn field while the odd page manages the ESe field. 986 */ 987 memory_region_init_io(&xsrc->esb_mmio, OBJECT(xsrc), 988 &xive2_end_source_ops, xsrc, "xive.end", 989 (1ull << (xsrc->esb_shift + 1)) * xsrc->nr_ends); 990 } 991 992 static Property xive2_end_source_properties[] = { 993 DEFINE_PROP_UINT32("nr-ends", Xive2EndSource, nr_ends, 0), 994 DEFINE_PROP_UINT32("shift", Xive2EndSource, esb_shift, XIVE_ESB_64K), 995 DEFINE_PROP_LINK("xive", Xive2EndSource, xrtr, TYPE_XIVE2_ROUTER, 996 Xive2Router *), 997 DEFINE_PROP_END_OF_LIST(), 998 }; 999 1000 static void xive2_end_source_class_init(ObjectClass *klass, void *data) 1001 { 1002 DeviceClass *dc = DEVICE_CLASS(klass); 1003 1004 dc->desc = "XIVE END Source"; 1005 device_class_set_props(dc, xive2_end_source_properties); 1006 dc->realize = xive2_end_source_realize; 1007 dc->user_creatable = false; 1008 } 1009 1010 static const TypeInfo xive2_end_source_info = { 1011 .name = TYPE_XIVE2_END_SOURCE, 1012 .parent = TYPE_DEVICE, 1013 .instance_size = sizeof(Xive2EndSource), 1014 .class_init = xive2_end_source_class_init, 1015 }; 1016 1017 static void xive2_register_types(void) 1018 { 1019 type_register_static(&xive2_router_info); 1020 type_register_static(&xive2_end_source_info); 1021 } 1022 1023 type_init(xive2_register_types) 1024