1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (C) 2010 Andreas Tobler 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/param.h> 29 #include <sys/kernel.h> 30 #include <sys/ktr.h> 31 #include <sys/lock.h> 32 #include <sys/rmlock.h> 33 #include <sys/mutex.h> 34 #include <sys/proc.h> 35 #include <sys/sysctl.h> 36 #include <sys/systm.h> 37 #include <sys/vmmeter.h> 38 39 #include <dev/ofw/openfirm.h> 40 #include <machine/ofw_machdep.h> 41 42 #include <vm/vm.h> 43 #include <vm/vm_param.h> 44 #include <vm/vm_kern.h> 45 #include <vm/vm_page.h> 46 #include <vm/vm_map.h> 47 #include <vm/vm_object.h> 48 #include <vm/vm_extern.h> 49 #include <vm/vm_pageout.h> 50 #include <vm/uma.h> 51 52 #include <powerpc/aim/mmu_oea64.h> 53 54 #include "phyp-hvcall.h" 55 56 #define MMU_PHYP_DEBUG 0 57 #define MMU_PHYP_ID "mmu_phyp: " 58 #if MMU_PHYP_DEBUG 59 #define dprintf(fmt, ...) printf(fmt, ## __VA_ARGS__) 60 #define dprintf0(fmt, ...) dprintf(MMU_PHYP_ID fmt, ## __VA_ARGS__) 61 #else 62 #define dprintf(fmt, args...) do { ; } while(0) 63 #define dprintf0(fmt, args...) do { ; } while(0) 64 #endif 65 66 static struct rmlock mphyp_eviction_lock; 67 68 /* 69 * Kernel MMU interface 70 */ 71 72 static void mphyp_install(void); 73 static void mphyp_bootstrap(vm_offset_t kernelstart, 74 vm_offset_t kernelend); 75 static void mphyp_cpu_bootstrap(int ap); 76 static void *mphyp_dump_pmap(void *ctx, void *buf, 77 u_long *nbytes); 78 static int64_t mphyp_pte_synch(struct pvo_entry *pvo); 79 static int64_t mphyp_pte_clear(struct pvo_entry *pvo, uint64_t ptebit); 80 static int64_t mphyp_pte_unset(struct pvo_entry *pvo); 81 static int64_t mphyp_pte_insert(struct pvo_entry *pvo); 82 static int64_t mphyp_pte_unset_sp(struct pvo_entry *pvo); 83 static int64_t mphyp_pte_insert_sp(struct pvo_entry *pvo); 84 static int64_t mphyp_pte_replace_sp(struct pvo_entry *pvo); 85 86 static struct pmap_funcs mphyp_methods = { 87 .install = mphyp_install, 88 .bootstrap = mphyp_bootstrap, 89 .cpu_bootstrap = mphyp_cpu_bootstrap, 90 .dumpsys_dump_pmap = mphyp_dump_pmap, 91 }; 92 93 static struct moea64_funcs mmu_phyp_funcs = { 94 .pte_synch = mphyp_pte_synch, 95 .pte_clear = mphyp_pte_clear, 96 .pte_unset = mphyp_pte_unset, 97 .pte_insert = mphyp_pte_insert, 98 .pte_unset_sp = mphyp_pte_unset_sp, 99 .pte_insert_sp = mphyp_pte_insert_sp, 100 .pte_replace_sp = mphyp_pte_replace_sp, 101 }; 102 103 MMU_DEF_INHERIT(pseries_mmu, "mmu_phyp", mphyp_methods, oea64_mmu); 104 105 static int brokenkvm = 0; 106 static uint64_t final_pteg_count = 0; 107 108 static void 109 print_kvm_bug_warning(void *data) 110 { 111 112 if (brokenkvm) 113 printf("WARNING: Running on a broken hypervisor that does " 114 "not support mandatory H_CLEAR_MOD and H_CLEAR_REF " 115 "hypercalls. Performance will be suboptimal.\n"); 116 } 117 118 SYSINIT(kvmbugwarn1, SI_SUB_COPYRIGHT, SI_ORDER_THIRD + 1, 119 print_kvm_bug_warning, NULL); 120 SYSINIT(kvmbugwarn2, SI_SUB_LAST, SI_ORDER_THIRD + 1, print_kvm_bug_warning, 121 NULL); 122 123 static void 124 mphyp_install(void) 125 { 126 char buf[8]; 127 uint32_t prop[2]; 128 uint32_t nptlp, shift = 0, slb_encoding = 0; 129 uint32_t lp_size, lp_encoding; 130 phandle_t dev, node, root; 131 int idx, len, res; 132 bool has_lp; 133 134 root = OF_peer(0); 135 136 dev = OF_child(root); 137 while (dev != 0) { 138 res = OF_getprop(dev, "name", buf, sizeof(buf)); 139 if (res > 0 && strcmp(buf, "cpus") == 0) 140 break; 141 dev = OF_peer(dev); 142 } 143 144 node = OF_child(dev); 145 146 while (node != 0) { 147 res = OF_getprop(node, "device_type", buf, sizeof(buf)); 148 if (res > 0 && strcmp(buf, "cpu") == 0) 149 break; 150 node = OF_peer(node); 151 } 152 153 res = OF_getencprop(node, "ibm,pft-size", prop, sizeof(prop)); 154 if (res <= 0) 155 panic("mmu_phyp: unknown PFT size"); 156 final_pteg_count = 1 << prop[1]; 157 res = OF_getencprop(node, "ibm,slb-size", prop, sizeof(prop[0])); 158 if (res > 0) 159 n_slbs = prop[0]; 160 dprintf0("slb-size=%i\n", n_slbs); 161 162 /* 163 * Scan the large page size property for PAPR compatible machines. 164 * See PAPR D.5 Changes to Section 5.1.4, 'CPU Node Properties' 165 * for the encoding of the property. 166 */ 167 168 len = OF_getproplen(node, "ibm,segment-page-sizes"); 169 if (len > 0) { 170 /* 171 * We have to use a variable length array on the stack 172 * since we have very limited stack space. 173 */ 174 pcell_t arr[len/sizeof(cell_t)]; 175 res = OF_getencprop(node, "ibm,segment-page-sizes", arr, 176 sizeof(arr)); 177 len /= 4; 178 idx = 0; 179 has_lp = false; 180 while (len > 0) { 181 shift = arr[idx]; 182 slb_encoding = arr[idx + 1]; 183 nptlp = arr[idx + 2]; 184 185 dprintf0("Segment Page Size: " 186 "%uKB, slb_enc=0x%X: {size, encoding}[%u] =", 187 shift > 10? 1 << (shift-10) : 0, 188 slb_encoding, nptlp); 189 190 idx += 3; 191 len -= 3; 192 while (len > 0 && nptlp) { 193 lp_size = arr[idx]; 194 lp_encoding = arr[idx+1]; 195 196 dprintf(" {%uKB, 0x%X}", 197 lp_size > 10? 1 << (lp_size-10) : 0, 198 lp_encoding); 199 200 if (slb_encoding == SLBV_L && lp_encoding == 0) 201 has_lp = true; 202 203 if (slb_encoding == SLB_PGSZ_4K_4K && 204 lp_encoding == LP_4K_16M) 205 moea64_has_lp_4k_16m = true; 206 207 idx += 2; 208 len -= 2; 209 nptlp--; 210 } 211 dprintf("\n"); 212 if (has_lp && moea64_has_lp_4k_16m) 213 break; 214 } 215 216 if (has_lp) { 217 moea64_large_page_shift = shift; 218 moea64_large_page_size = 1ULL << lp_size; 219 moea64_large_page_mask = moea64_large_page_size - 1; 220 hw_direct_map = 1; 221 printf(MMU_PHYP_ID 222 "Support for hugepages of %uKB detected\n", 223 moea64_large_page_shift > 10? 224 1 << (moea64_large_page_shift-10) : 0); 225 } else { 226 moea64_large_page_size = 0; 227 moea64_large_page_shift = 0; 228 moea64_large_page_mask = 0; 229 hw_direct_map = 0; 230 printf(MMU_PHYP_ID 231 "Support for hugepages not found\n"); 232 } 233 } 234 235 moea64_ops = &mmu_phyp_funcs; 236 237 moea64_install(); 238 } 239 240 static void 241 mphyp_bootstrap(vm_offset_t kernelstart, vm_offset_t kernelend) 242 { 243 struct lpte old; 244 uint64_t vsid; 245 int idx; 246 247 rm_init(&mphyp_eviction_lock, "pte eviction"); 248 249 moea64_early_bootstrap(kernelstart, kernelend); 250 251 moea64_pteg_count = final_pteg_count / sizeof(struct lpteg); 252 253 /* Clear any old page table entries */ 254 for (idx = 0; idx < moea64_pteg_count*8; idx++) { 255 phyp_pft_hcall(H_READ, 0, idx, 0, 0, &old.pte_hi, 256 &old.pte_lo, &old.pte_lo); 257 vsid = (old.pte_hi << (ADDR_API_SHFT64 - ADDR_PIDX_SHFT)) >> 28; 258 if (vsid == VSID_VRMA || vsid == 0 /* Older VRMA */) 259 continue; 260 261 if (old.pte_hi & LPTE_VALID) 262 phyp_hcall(H_REMOVE, 0, idx, 0); 263 } 264 265 moea64_mid_bootstrap(kernelstart, kernelend); 266 moea64_late_bootstrap(kernelstart, kernelend); 267 268 /* Test for broken versions of KVM that don't conform to the spec */ 269 if (phyp_hcall(H_CLEAR_MOD, 0, 0) == H_FUNCTION) 270 brokenkvm = 1; 271 } 272 273 static void 274 mphyp_cpu_bootstrap(int ap) 275 { 276 struct slb *slb = PCPU_GET(aim.slb); 277 register_t seg0; 278 int i; 279 280 /* 281 * Install kernel SLB entries 282 */ 283 284 __asm __volatile ("slbia"); 285 __asm __volatile ("slbmfee %0,%1; slbie %0;" : "=r"(seg0) : "r"(0)); 286 for (i = 0; i < 64; i++) { 287 if (!(slb[i].slbe & SLBE_VALID)) 288 continue; 289 290 __asm __volatile ("slbmte %0, %1" :: 291 "r"(slb[i].slbv), "r"(slb[i].slbe)); 292 } 293 } 294 295 static int64_t 296 mphyp_pte_synch(struct pvo_entry *pvo) 297 { 298 struct lpte pte; 299 uint64_t junk; 300 301 __asm __volatile("ptesync"); 302 phyp_pft_hcall(H_READ, 0, pvo->pvo_pte.slot, 0, 0, &pte.pte_hi, 303 &pte.pte_lo, &junk); 304 if ((pte.pte_hi & LPTE_AVPN_MASK) != 305 ((pvo->pvo_vpn >> (ADDR_API_SHFT64 - ADDR_PIDX_SHFT)) & 306 LPTE_AVPN_MASK)) 307 return (-1); 308 if (!(pte.pte_hi & LPTE_VALID)) 309 return (-1); 310 311 return (pte.pte_lo & (LPTE_CHG | LPTE_REF)); 312 } 313 314 static int64_t 315 mphyp_pte_clear(struct pvo_entry *pvo, uint64_t ptebit) 316 { 317 struct rm_priotracker track; 318 int64_t refchg; 319 uint64_t ptelo, junk; 320 int err __diagused; 321 322 /* 323 * This involves two steps (synch and clear) so we need the entry 324 * not to change in the middle. We are protected against deliberate 325 * unset by virtue of holding the pmap lock. Protection against 326 * incidental unset (page table eviction) comes from holding the 327 * shared eviction lock. 328 */ 329 PMAP_LOCK_ASSERT(pvo->pvo_pmap, MA_OWNED); 330 rm_rlock(&mphyp_eviction_lock, &track); 331 332 refchg = mphyp_pte_synch(pvo); 333 if (refchg < 0) { 334 rm_runlock(&mphyp_eviction_lock, &track); 335 return (refchg); 336 } 337 338 if (brokenkvm) { 339 /* 340 * No way to clear either bit, which is total madness. 341 * Pessimistically claim that, once modified, it stays so 342 * forever and that it is never referenced. 343 */ 344 rm_runlock(&mphyp_eviction_lock, &track); 345 return (refchg & ~LPTE_REF); 346 } 347 348 if (ptebit & LPTE_CHG) { 349 err = phyp_pft_hcall(H_CLEAR_MOD, 0, pvo->pvo_pte.slot, 0, 0, 350 &ptelo, &junk, &junk); 351 KASSERT(err == H_SUCCESS, 352 ("Error clearing page change bit: %d", err)); 353 refchg |= (ptelo & LPTE_CHG); 354 } 355 if (ptebit & LPTE_REF) { 356 err = phyp_pft_hcall(H_CLEAR_REF, 0, pvo->pvo_pte.slot, 0, 0, 357 &ptelo, &junk, &junk); 358 KASSERT(err == H_SUCCESS, 359 ("Error clearing page reference bit: %d", err)); 360 refchg |= (ptelo & LPTE_REF); 361 } 362 363 rm_runlock(&mphyp_eviction_lock, &track); 364 365 return (refchg); 366 } 367 368 static int64_t 369 mphyp_pte_unset(struct pvo_entry *pvo) 370 { 371 struct lpte pte; 372 uint64_t junk; 373 int err; 374 375 PMAP_LOCK_ASSERT(pvo->pvo_pmap, MA_OWNED); 376 377 moea64_pte_from_pvo(pvo, &pte); 378 379 err = phyp_pft_hcall(H_REMOVE, H_AVPN, pvo->pvo_pte.slot, 380 pte.pte_hi & LPTE_AVPN_MASK, 0, &pte.pte_hi, &pte.pte_lo, 381 &junk); 382 KASSERT(err == H_SUCCESS || err == H_NOT_FOUND, 383 ("Error removing page: %d", err)); 384 385 if (err == H_NOT_FOUND) { 386 STAT_MOEA64(moea64_pte_overflow--); 387 return (-1); 388 } 389 390 return (pte.pte_lo & (LPTE_REF | LPTE_CHG)); 391 } 392 393 static uintptr_t 394 mphyp_pte_spillable_ident(uintptr_t ptegbase, struct lpte *to_evict) 395 { 396 uint64_t slot, junk, k; 397 struct lpte pt; 398 int i, j; 399 400 /* Start at a random slot */ 401 i = mftb() % 8; 402 k = -1; 403 for (j = 0; j < 8; j++) { 404 slot = ptegbase + (i + j) % 8; 405 phyp_pft_hcall(H_READ, 0, slot, 0, 0, &pt.pte_hi, 406 &pt.pte_lo, &junk); 407 408 if ((pt.pte_hi & (LPTE_WIRED | LPTE_BIG)) != 0) 409 continue; 410 411 /* This is a candidate, so remember it */ 412 k = slot; 413 414 /* Try to get a page that has not been used lately */ 415 if (!(pt.pte_hi & LPTE_VALID) || !(pt.pte_lo & LPTE_REF)) { 416 memcpy(to_evict, &pt, sizeof(struct lpte)); 417 return (k); 418 } 419 } 420 421 if (k == -1) 422 return (k); 423 424 phyp_pft_hcall(H_READ, 0, k, 0, 0, &to_evict->pte_hi, 425 &to_evict->pte_lo, &junk); 426 return (k); 427 } 428 429 static __inline int64_t 430 mphyp_pte_insert_locked(struct pvo_entry *pvo, struct lpte *pte) 431 { 432 struct lpte evicted; 433 uint64_t index, junk; 434 int64_t result; 435 436 /* 437 * First try primary hash. 438 */ 439 pvo->pvo_pte.slot &= ~7UL; /* Base slot address */ 440 result = phyp_pft_hcall(H_ENTER, 0, pvo->pvo_pte.slot, pte->pte_hi, 441 pte->pte_lo, &index, &evicted.pte_lo, &junk); 442 if (result == H_SUCCESS) { 443 pvo->pvo_pte.slot = index; 444 return (0); 445 } 446 KASSERT(result == H_PTEG_FULL, ("Page insertion error: %ld " 447 "(ptegidx: %#zx/%#lx, PTE %#lx/%#lx", result, pvo->pvo_pte.slot, 448 moea64_pteg_count, pte->pte_hi, pte->pte_lo)); 449 450 /* 451 * Next try secondary hash. 452 */ 453 pvo->pvo_vaddr ^= PVO_HID; 454 pte->pte_hi ^= LPTE_HID; 455 pvo->pvo_pte.slot ^= (moea64_pteg_mask << 3); 456 457 result = phyp_pft_hcall(H_ENTER, 0, pvo->pvo_pte.slot, 458 pte->pte_hi, pte->pte_lo, &index, &evicted.pte_lo, &junk); 459 if (result == H_SUCCESS) { 460 pvo->pvo_pte.slot = index; 461 return (0); 462 } 463 KASSERT(result == H_PTEG_FULL, ("Secondary page insertion error: %ld", 464 result)); 465 466 return (-1); 467 } 468 469 470 static __inline int64_t 471 mphyp_pte_evict_and_insert_locked(struct pvo_entry *pvo, struct lpte *pte) 472 { 473 struct lpte evicted; 474 uint64_t index, junk, lastptelo; 475 int64_t result; 476 477 evicted.pte_hi = 0; 478 479 index = mphyp_pte_spillable_ident(pvo->pvo_pte.slot, &evicted); 480 if (index == -1L) { 481 /* Try other hash table? */ 482 pvo->pvo_vaddr ^= PVO_HID; 483 pte->pte_hi ^= LPTE_HID; 484 pvo->pvo_pte.slot ^= (moea64_pteg_mask << 3); 485 index = mphyp_pte_spillable_ident(pvo->pvo_pte.slot, &evicted); 486 } 487 488 if (index == -1L) { 489 /* No freeable slots in either PTEG? We're hosed. */ 490 rm_wunlock(&mphyp_eviction_lock); 491 panic("mphyp_pte_insert: overflow"); 492 return (-1); 493 } 494 495 /* Victim acquired: update page before waving goodbye */ 496 if (evicted.pte_hi & LPTE_VALID) { 497 result = phyp_pft_hcall(H_REMOVE, H_AVPN, index, 498 evicted.pte_hi & LPTE_AVPN_MASK, 0, &junk, &lastptelo, 499 &junk); 500 STAT_MOEA64(moea64_pte_overflow++); 501 KASSERT(result == H_SUCCESS || result == H_NOT_FOUND, 502 ("Error evicting page: %d", (int)result)); 503 } 504 505 /* 506 * Set the new PTE. 507 */ 508 result = phyp_pft_hcall(H_ENTER, H_EXACT, index, pte->pte_hi, 509 pte->pte_lo, &index, &evicted.pte_lo, &junk); 510 511 pvo->pvo_pte.slot = index; 512 if (result == H_SUCCESS) 513 return (0); 514 515 rm_wunlock(&mphyp_eviction_lock); 516 panic("Page replacement error: %ld", result); 517 return (result); 518 } 519 520 static int64_t 521 mphyp_pte_insert(struct pvo_entry *pvo) 522 { 523 struct rm_priotracker track; 524 int64_t ret; 525 struct lpte pte; 526 527 PMAP_LOCK_ASSERT(pvo->pvo_pmap, MA_OWNED); 528 529 /* Initialize PTE */ 530 moea64_pte_from_pvo(pvo, &pte); 531 532 /* Make sure further insertion is locked out during evictions */ 533 rm_rlock(&mphyp_eviction_lock, &track); 534 535 ret = mphyp_pte_insert_locked(pvo, &pte); 536 rm_runlock(&mphyp_eviction_lock, &track); 537 538 if (ret == -1) { 539 /* 540 * Out of luck. Find a PTE to sacrifice. 541 */ 542 543 /* Lock out all insertions for a bit */ 544 rm_wlock(&mphyp_eviction_lock); 545 ret = mphyp_pte_evict_and_insert_locked(pvo, &pte); 546 rm_wunlock(&mphyp_eviction_lock); /* All clear */ 547 } 548 549 return (ret); 550 } 551 552 static void * 553 mphyp_dump_pmap(void *ctx, void *buf, u_long *nbytes) 554 { 555 struct dump_context *dctx; 556 struct lpte p, *pbuf; 557 int bufidx; 558 uint64_t junk; 559 u_long ptex, ptex_end; 560 561 dctx = (struct dump_context *)ctx; 562 pbuf = (struct lpte *)buf; 563 bufidx = 0; 564 ptex = dctx->ptex; 565 ptex_end = ptex + dctx->blksz / sizeof(struct lpte); 566 ptex_end = MIN(ptex_end, dctx->ptex_end); 567 *nbytes = (ptex_end - ptex) * sizeof(struct lpte); 568 569 if (*nbytes == 0) 570 return (NULL); 571 572 for (; ptex < ptex_end; ptex++) { 573 phyp_pft_hcall(H_READ, 0, ptex, 0, 0, 574 &p.pte_hi, &p.pte_lo, &junk); 575 pbuf[bufidx++] = p; 576 } 577 578 dctx->ptex = ptex; 579 return (buf); 580 } 581 582 static int64_t 583 mphyp_pte_unset_sp(struct pvo_entry *pvo) 584 { 585 struct lpte pte; 586 uint64_t junk, refchg; 587 int err; 588 vm_offset_t eva; 589 pmap_t pm __diagused; 590 591 pm = pvo->pvo_pmap; 592 PMAP_LOCK_ASSERT(pm, MA_OWNED); 593 KASSERT((PVO_VADDR(pvo) & HPT_SP_MASK) == 0, 594 ("%s: va %#jx unaligned", __func__, (uintmax_t)PVO_VADDR(pvo))); 595 596 refchg = 0; 597 eva = PVO_VADDR(pvo) + HPT_SP_SIZE; 598 599 for (; pvo != NULL && PVO_VADDR(pvo) < eva; 600 pvo = RB_NEXT(pvo_tree, &pm->pmap_pvo, pvo)) { 601 moea64_pte_from_pvo(pvo, &pte); 602 603 err = phyp_pft_hcall(H_REMOVE, H_AVPN, pvo->pvo_pte.slot, 604 pte.pte_hi & LPTE_AVPN_MASK, 0, &pte.pte_hi, &pte.pte_lo, 605 &junk); 606 KASSERT(err == H_SUCCESS || err == H_NOT_FOUND, 607 ("Error removing page: %d", err)); 608 609 if (err == H_NOT_FOUND) 610 STAT_MOEA64(moea64_pte_overflow--); 611 refchg |= pte.pte_lo & (LPTE_REF | LPTE_CHG); 612 } 613 614 return (refchg); 615 } 616 617 static int64_t 618 mphyp_pte_insert_sp(struct pvo_entry *pvo) 619 { 620 struct rm_priotracker track; 621 int64_t ret; 622 struct lpte pte; 623 vm_offset_t eva; 624 pmap_t pm __diagused; 625 626 pm = pvo->pvo_pmap; 627 PMAP_LOCK_ASSERT(pm, MA_OWNED); 628 KASSERT((PVO_VADDR(pvo) & HPT_SP_MASK) == 0, 629 ("%s: va %#jx unaligned", __func__, (uintmax_t)PVO_VADDR(pvo))); 630 631 eva = PVO_VADDR(pvo) + HPT_SP_SIZE; 632 633 /* Make sure further insertion is locked out during evictions */ 634 rm_rlock(&mphyp_eviction_lock, &track); 635 636 for (; pvo != NULL && PVO_VADDR(pvo) < eva; 637 pvo = RB_NEXT(pvo_tree, &pm->pmap_pvo, pvo)) { 638 /* Initialize PTE */ 639 moea64_pte_from_pvo(pvo, &pte); 640 641 ret = mphyp_pte_insert_locked(pvo, &pte); 642 if (ret == -1) { 643 /* 644 * Out of luck. Find a PTE to sacrifice. 645 */ 646 647 /* Lock out all insertions for a bit */ 648 rm_runlock(&mphyp_eviction_lock, &track); 649 rm_wlock(&mphyp_eviction_lock); 650 mphyp_pte_evict_and_insert_locked(pvo, &pte); 651 rm_wunlock(&mphyp_eviction_lock); /* All clear */ 652 rm_rlock(&mphyp_eviction_lock, &track); 653 } 654 } 655 656 rm_runlock(&mphyp_eviction_lock, &track); 657 return (0); 658 } 659 660 static int64_t 661 mphyp_pte_replace_sp(struct pvo_entry *pvo) 662 { 663 int64_t refchg; 664 665 refchg = mphyp_pte_unset_sp(pvo); 666 mphyp_pte_insert_sp(pvo); 667 return (refchg); 668 } 669