1 /* 2 * Copyright (C) 2008-2013 Freescale Semiconductor, Inc. All rights reserved. 3 * 4 * Author: Yu Liu, yu.liu@freescale.com 5 * Scott Wood, scottwood@freescale.com 6 * Ashish Kalra, ashish.kalra@freescale.com 7 * Varun Sethi, varun.sethi@freescale.com 8 * Alexander Graf, agraf@suse.de 9 * 10 * Description: 11 * This file is based on arch/powerpc/kvm/44x_tlb.c, 12 * by Hollis Blanchard <hollisb@us.ibm.com>. 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License, version 2, as 16 * published by the Free Software Foundation. 17 */ 18 19 #include <linux/kernel.h> 20 #include <linux/types.h> 21 #include <linux/slab.h> 22 #include <linux/string.h> 23 #include <linux/kvm.h> 24 #include <linux/kvm_host.h> 25 #include <linux/highmem.h> 26 #include <linux/log2.h> 27 #include <linux/uaccess.h> 28 #include <linux/sched.h> 29 #include <linux/rwsem.h> 30 #include <linux/vmalloc.h> 31 #include <linux/hugetlb.h> 32 #include <asm/kvm_ppc.h> 33 34 #include "e500.h" 35 #include "trace.h" 36 #include "timing.h" 37 #include "e500_mmu_host.h" 38 39 static inline unsigned int gtlb0_get_next_victim( 40 struct kvmppc_vcpu_e500 *vcpu_e500) 41 { 42 unsigned int victim; 43 44 victim = vcpu_e500->gtlb_nv[0]++; 45 if (unlikely(vcpu_e500->gtlb_nv[0] >= vcpu_e500->gtlb_params[0].ways)) 46 vcpu_e500->gtlb_nv[0] = 0; 47 48 return victim; 49 } 50 51 static int tlb0_set_base(gva_t addr, int sets, int ways) 52 { 53 int set_base; 54 55 set_base = (addr >> PAGE_SHIFT) & (sets - 1); 56 set_base *= ways; 57 58 return set_base; 59 } 60 61 static int gtlb0_set_base(struct kvmppc_vcpu_e500 *vcpu_e500, gva_t addr) 62 { 63 return tlb0_set_base(addr, vcpu_e500->gtlb_params[0].sets, 64 vcpu_e500->gtlb_params[0].ways); 65 } 66 67 static unsigned int get_tlb_esel(struct kvm_vcpu *vcpu, int tlbsel) 68 { 69 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 70 int esel = get_tlb_esel_bit(vcpu); 71 72 if (tlbsel == 0) { 73 esel &= vcpu_e500->gtlb_params[0].ways - 1; 74 esel += gtlb0_set_base(vcpu_e500, vcpu->arch.shared->mas2); 75 } else { 76 esel &= vcpu_e500->gtlb_params[tlbsel].entries - 1; 77 } 78 79 return esel; 80 } 81 82 /* Search the guest TLB for a matching entry. */ 83 static int kvmppc_e500_tlb_index(struct kvmppc_vcpu_e500 *vcpu_e500, 84 gva_t eaddr, int tlbsel, unsigned int pid, int as) 85 { 86 int size = vcpu_e500->gtlb_params[tlbsel].entries; 87 unsigned int set_base, offset; 88 int i; 89 90 if (tlbsel == 0) { 91 set_base = gtlb0_set_base(vcpu_e500, eaddr); 92 size = vcpu_e500->gtlb_params[0].ways; 93 } else { 94 if (eaddr < vcpu_e500->tlb1_min_eaddr || 95 eaddr > vcpu_e500->tlb1_max_eaddr) 96 return -1; 97 set_base = 0; 98 } 99 100 offset = vcpu_e500->gtlb_offset[tlbsel]; 101 102 for (i = 0; i < size; i++) { 103 struct kvm_book3e_206_tlb_entry *tlbe = 104 &vcpu_e500->gtlb_arch[offset + set_base + i]; 105 unsigned int tid; 106 107 if (eaddr < get_tlb_eaddr(tlbe)) 108 continue; 109 110 if (eaddr > get_tlb_end(tlbe)) 111 continue; 112 113 tid = get_tlb_tid(tlbe); 114 if (tid && (tid != pid)) 115 continue; 116 117 if (!get_tlb_v(tlbe)) 118 continue; 119 120 if (get_tlb_ts(tlbe) != as && as != -1) 121 continue; 122 123 return set_base + i; 124 } 125 126 return -1; 127 } 128 129 static inline void kvmppc_e500_deliver_tlb_miss(struct kvm_vcpu *vcpu, 130 unsigned int eaddr, int as) 131 { 132 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 133 unsigned int victim, tsized; 134 int tlbsel; 135 136 /* since we only have two TLBs, only lower bit is used. */ 137 tlbsel = (vcpu->arch.shared->mas4 >> 28) & 0x1; 138 victim = (tlbsel == 0) ? gtlb0_get_next_victim(vcpu_e500) : 0; 139 tsized = (vcpu->arch.shared->mas4 >> 7) & 0x1f; 140 141 vcpu->arch.shared->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(victim) 142 | MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]); 143 vcpu->arch.shared->mas1 = MAS1_VALID | (as ? MAS1_TS : 0) 144 | MAS1_TID(get_tlbmiss_tid(vcpu)) 145 | MAS1_TSIZE(tsized); 146 vcpu->arch.shared->mas2 = (eaddr & MAS2_EPN) 147 | (vcpu->arch.shared->mas4 & MAS2_ATTRIB_MASK); 148 vcpu->arch.shared->mas7_3 &= MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3; 149 vcpu->arch.shared->mas6 = (vcpu->arch.shared->mas6 & MAS6_SPID1) 150 | (get_cur_pid(vcpu) << 16) 151 | (as ? MAS6_SAS : 0); 152 } 153 154 static void kvmppc_recalc_tlb1map_range(struct kvmppc_vcpu_e500 *vcpu_e500) 155 { 156 int size = vcpu_e500->gtlb_params[1].entries; 157 unsigned int offset; 158 gva_t eaddr; 159 int i; 160 161 vcpu_e500->tlb1_min_eaddr = ~0UL; 162 vcpu_e500->tlb1_max_eaddr = 0; 163 offset = vcpu_e500->gtlb_offset[1]; 164 165 for (i = 0; i < size; i++) { 166 struct kvm_book3e_206_tlb_entry *tlbe = 167 &vcpu_e500->gtlb_arch[offset + i]; 168 169 if (!get_tlb_v(tlbe)) 170 continue; 171 172 eaddr = get_tlb_eaddr(tlbe); 173 vcpu_e500->tlb1_min_eaddr = 174 min(vcpu_e500->tlb1_min_eaddr, eaddr); 175 176 eaddr = get_tlb_end(tlbe); 177 vcpu_e500->tlb1_max_eaddr = 178 max(vcpu_e500->tlb1_max_eaddr, eaddr); 179 } 180 } 181 182 static int kvmppc_need_recalc_tlb1map_range(struct kvmppc_vcpu_e500 *vcpu_e500, 183 struct kvm_book3e_206_tlb_entry *gtlbe) 184 { 185 unsigned long start, end, size; 186 187 size = get_tlb_bytes(gtlbe); 188 start = get_tlb_eaddr(gtlbe) & ~(size - 1); 189 end = start + size - 1; 190 191 return vcpu_e500->tlb1_min_eaddr == start || 192 vcpu_e500->tlb1_max_eaddr == end; 193 } 194 195 /* This function is supposed to be called for a adding a new valid tlb entry */ 196 static void kvmppc_set_tlb1map_range(struct kvm_vcpu *vcpu, 197 struct kvm_book3e_206_tlb_entry *gtlbe) 198 { 199 unsigned long start, end, size; 200 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 201 202 if (!get_tlb_v(gtlbe)) 203 return; 204 205 size = get_tlb_bytes(gtlbe); 206 start = get_tlb_eaddr(gtlbe) & ~(size - 1); 207 end = start + size - 1; 208 209 vcpu_e500->tlb1_min_eaddr = min(vcpu_e500->tlb1_min_eaddr, start); 210 vcpu_e500->tlb1_max_eaddr = max(vcpu_e500->tlb1_max_eaddr, end); 211 } 212 213 static inline int kvmppc_e500_gtlbe_invalidate( 214 struct kvmppc_vcpu_e500 *vcpu_e500, 215 int tlbsel, int esel) 216 { 217 struct kvm_book3e_206_tlb_entry *gtlbe = 218 get_entry(vcpu_e500, tlbsel, esel); 219 220 if (unlikely(get_tlb_iprot(gtlbe))) 221 return -1; 222 223 if (tlbsel == 1 && kvmppc_need_recalc_tlb1map_range(vcpu_e500, gtlbe)) 224 kvmppc_recalc_tlb1map_range(vcpu_e500); 225 226 gtlbe->mas1 = 0; 227 228 return 0; 229 } 230 231 int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500, ulong value) 232 { 233 int esel; 234 235 if (value & MMUCSR0_TLB0FI) 236 for (esel = 0; esel < vcpu_e500->gtlb_params[0].entries; esel++) 237 kvmppc_e500_gtlbe_invalidate(vcpu_e500, 0, esel); 238 if (value & MMUCSR0_TLB1FI) 239 for (esel = 0; esel < vcpu_e500->gtlb_params[1].entries; esel++) 240 kvmppc_e500_gtlbe_invalidate(vcpu_e500, 1, esel); 241 242 /* Invalidate all host shadow mappings */ 243 kvmppc_core_flush_tlb(&vcpu_e500->vcpu); 244 245 return EMULATE_DONE; 246 } 247 248 int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, gva_t ea) 249 { 250 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 251 unsigned int ia; 252 int esel, tlbsel; 253 254 ia = (ea >> 2) & 0x1; 255 256 /* since we only have two TLBs, only lower bit is used. */ 257 tlbsel = (ea >> 3) & 0x1; 258 259 if (ia) { 260 /* invalidate all entries */ 261 for (esel = 0; esel < vcpu_e500->gtlb_params[tlbsel].entries; 262 esel++) 263 kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel); 264 } else { 265 ea &= 0xfffff000; 266 esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel, 267 get_cur_pid(vcpu), -1); 268 if (esel >= 0) 269 kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel); 270 } 271 272 /* Invalidate all host shadow mappings */ 273 kvmppc_core_flush_tlb(&vcpu_e500->vcpu); 274 275 return EMULATE_DONE; 276 } 277 278 static void tlbilx_all(struct kvmppc_vcpu_e500 *vcpu_e500, int tlbsel, 279 int pid, int type) 280 { 281 struct kvm_book3e_206_tlb_entry *tlbe; 282 int tid, esel; 283 284 /* invalidate all entries */ 285 for (esel = 0; esel < vcpu_e500->gtlb_params[tlbsel].entries; esel++) { 286 tlbe = get_entry(vcpu_e500, tlbsel, esel); 287 tid = get_tlb_tid(tlbe); 288 if (type == 0 || tid == pid) { 289 inval_gtlbe_on_host(vcpu_e500, tlbsel, esel); 290 kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel); 291 } 292 } 293 } 294 295 static void tlbilx_one(struct kvmppc_vcpu_e500 *vcpu_e500, int pid, 296 gva_t ea) 297 { 298 int tlbsel, esel; 299 300 for (tlbsel = 0; tlbsel < 2; tlbsel++) { 301 esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel, pid, -1); 302 if (esel >= 0) { 303 inval_gtlbe_on_host(vcpu_e500, tlbsel, esel); 304 kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel); 305 break; 306 } 307 } 308 } 309 310 int kvmppc_e500_emul_tlbilx(struct kvm_vcpu *vcpu, int type, gva_t ea) 311 { 312 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 313 int pid = get_cur_spid(vcpu); 314 315 if (type == 0 || type == 1) { 316 tlbilx_all(vcpu_e500, 0, pid, type); 317 tlbilx_all(vcpu_e500, 1, pid, type); 318 } else if (type == 3) { 319 tlbilx_one(vcpu_e500, pid, ea); 320 } 321 322 return EMULATE_DONE; 323 } 324 325 int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu) 326 { 327 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 328 int tlbsel, esel; 329 struct kvm_book3e_206_tlb_entry *gtlbe; 330 331 tlbsel = get_tlb_tlbsel(vcpu); 332 esel = get_tlb_esel(vcpu, tlbsel); 333 334 gtlbe = get_entry(vcpu_e500, tlbsel, esel); 335 vcpu->arch.shared->mas0 &= ~MAS0_NV(~0); 336 vcpu->arch.shared->mas0 |= MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]); 337 vcpu->arch.shared->mas1 = gtlbe->mas1; 338 vcpu->arch.shared->mas2 = gtlbe->mas2; 339 vcpu->arch.shared->mas7_3 = gtlbe->mas7_3; 340 341 return EMULATE_DONE; 342 } 343 344 int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, gva_t ea) 345 { 346 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 347 int as = !!get_cur_sas(vcpu); 348 unsigned int pid = get_cur_spid(vcpu); 349 int esel, tlbsel; 350 struct kvm_book3e_206_tlb_entry *gtlbe = NULL; 351 352 for (tlbsel = 0; tlbsel < 2; tlbsel++) { 353 esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel, pid, as); 354 if (esel >= 0) { 355 gtlbe = get_entry(vcpu_e500, tlbsel, esel); 356 break; 357 } 358 } 359 360 if (gtlbe) { 361 esel &= vcpu_e500->gtlb_params[tlbsel].ways - 1; 362 363 vcpu->arch.shared->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(esel) 364 | MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]); 365 vcpu->arch.shared->mas1 = gtlbe->mas1; 366 vcpu->arch.shared->mas2 = gtlbe->mas2; 367 vcpu->arch.shared->mas7_3 = gtlbe->mas7_3; 368 } else { 369 int victim; 370 371 /* since we only have two TLBs, only lower bit is used. */ 372 tlbsel = vcpu->arch.shared->mas4 >> 28 & 0x1; 373 victim = (tlbsel == 0) ? gtlb0_get_next_victim(vcpu_e500) : 0; 374 375 vcpu->arch.shared->mas0 = MAS0_TLBSEL(tlbsel) 376 | MAS0_ESEL(victim) 377 | MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]); 378 vcpu->arch.shared->mas1 = 379 (vcpu->arch.shared->mas6 & MAS6_SPID0) 380 | (vcpu->arch.shared->mas6 & (MAS6_SAS ? MAS1_TS : 0)) 381 | (vcpu->arch.shared->mas4 & MAS4_TSIZED(~0)); 382 vcpu->arch.shared->mas2 &= MAS2_EPN; 383 vcpu->arch.shared->mas2 |= vcpu->arch.shared->mas4 & 384 MAS2_ATTRIB_MASK; 385 vcpu->arch.shared->mas7_3 &= MAS3_U0 | MAS3_U1 | 386 MAS3_U2 | MAS3_U3; 387 } 388 389 kvmppc_set_exit_type(vcpu, EMULATED_TLBSX_EXITS); 390 return EMULATE_DONE; 391 } 392 393 int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu) 394 { 395 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 396 struct kvm_book3e_206_tlb_entry *gtlbe; 397 int tlbsel, esel; 398 int recal = 0; 399 int idx; 400 401 tlbsel = get_tlb_tlbsel(vcpu); 402 esel = get_tlb_esel(vcpu, tlbsel); 403 404 gtlbe = get_entry(vcpu_e500, tlbsel, esel); 405 406 if (get_tlb_v(gtlbe)) { 407 inval_gtlbe_on_host(vcpu_e500, tlbsel, esel); 408 if ((tlbsel == 1) && 409 kvmppc_need_recalc_tlb1map_range(vcpu_e500, gtlbe)) 410 recal = 1; 411 } 412 413 gtlbe->mas1 = vcpu->arch.shared->mas1; 414 gtlbe->mas2 = vcpu->arch.shared->mas2; 415 if (!(vcpu->arch.shared->msr & MSR_CM)) 416 gtlbe->mas2 &= 0xffffffffUL; 417 gtlbe->mas7_3 = vcpu->arch.shared->mas7_3; 418 419 trace_kvm_booke206_gtlb_write(vcpu->arch.shared->mas0, gtlbe->mas1, 420 gtlbe->mas2, gtlbe->mas7_3); 421 422 if (tlbsel == 1) { 423 /* 424 * If a valid tlb1 entry is overwritten then recalculate the 425 * min/max TLB1 map address range otherwise no need to look 426 * in tlb1 array. 427 */ 428 if (recal) 429 kvmppc_recalc_tlb1map_range(vcpu_e500); 430 else 431 kvmppc_set_tlb1map_range(vcpu, gtlbe); 432 } 433 434 idx = srcu_read_lock(&vcpu->kvm->srcu); 435 436 /* Invalidate shadow mappings for the about-to-be-clobbered TLBE. */ 437 if (tlbe_is_host_safe(vcpu, gtlbe)) { 438 u64 eaddr = get_tlb_eaddr(gtlbe); 439 u64 raddr = get_tlb_raddr(gtlbe); 440 441 if (tlbsel == 0) { 442 gtlbe->mas1 &= ~MAS1_TSIZE(~0); 443 gtlbe->mas1 |= MAS1_TSIZE(BOOK3E_PAGESZ_4K); 444 } 445 446 /* Premap the faulting page */ 447 kvmppc_mmu_map(vcpu, eaddr, raddr, index_of(tlbsel, esel)); 448 } 449 450 srcu_read_unlock(&vcpu->kvm->srcu, idx); 451 452 kvmppc_set_exit_type(vcpu, EMULATED_TLBWE_EXITS); 453 return EMULATE_DONE; 454 } 455 456 static int kvmppc_e500_tlb_search(struct kvm_vcpu *vcpu, 457 gva_t eaddr, unsigned int pid, int as) 458 { 459 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 460 int esel, tlbsel; 461 462 for (tlbsel = 0; tlbsel < 2; tlbsel++) { 463 esel = kvmppc_e500_tlb_index(vcpu_e500, eaddr, tlbsel, pid, as); 464 if (esel >= 0) 465 return index_of(tlbsel, esel); 466 } 467 468 return -1; 469 } 470 471 /* 'linear_address' is actually an encoding of AS|PID|EADDR . */ 472 int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu, 473 struct kvm_translation *tr) 474 { 475 int index; 476 gva_t eaddr; 477 u8 pid; 478 u8 as; 479 480 eaddr = tr->linear_address; 481 pid = (tr->linear_address >> 32) & 0xff; 482 as = (tr->linear_address >> 40) & 0x1; 483 484 index = kvmppc_e500_tlb_search(vcpu, eaddr, pid, as); 485 if (index < 0) { 486 tr->valid = 0; 487 return 0; 488 } 489 490 tr->physical_address = kvmppc_mmu_xlate(vcpu, index, eaddr); 491 /* XXX what does "writeable" and "usermode" even mean? */ 492 tr->valid = 1; 493 494 return 0; 495 } 496 497 498 int kvmppc_mmu_itlb_index(struct kvm_vcpu *vcpu, gva_t eaddr) 499 { 500 unsigned int as = !!(vcpu->arch.shared->msr & MSR_IS); 501 502 return kvmppc_e500_tlb_search(vcpu, eaddr, get_cur_pid(vcpu), as); 503 } 504 505 int kvmppc_mmu_dtlb_index(struct kvm_vcpu *vcpu, gva_t eaddr) 506 { 507 unsigned int as = !!(vcpu->arch.shared->msr & MSR_DS); 508 509 return kvmppc_e500_tlb_search(vcpu, eaddr, get_cur_pid(vcpu), as); 510 } 511 512 void kvmppc_mmu_itlb_miss(struct kvm_vcpu *vcpu) 513 { 514 unsigned int as = !!(vcpu->arch.shared->msr & MSR_IS); 515 516 kvmppc_e500_deliver_tlb_miss(vcpu, vcpu->arch.pc, as); 517 } 518 519 void kvmppc_mmu_dtlb_miss(struct kvm_vcpu *vcpu) 520 { 521 unsigned int as = !!(vcpu->arch.shared->msr & MSR_DS); 522 523 kvmppc_e500_deliver_tlb_miss(vcpu, vcpu->arch.fault_dear, as); 524 } 525 526 gpa_t kvmppc_mmu_xlate(struct kvm_vcpu *vcpu, unsigned int index, 527 gva_t eaddr) 528 { 529 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 530 struct kvm_book3e_206_tlb_entry *gtlbe; 531 u64 pgmask; 532 533 gtlbe = get_entry(vcpu_e500, tlbsel_of(index), esel_of(index)); 534 pgmask = get_tlb_bytes(gtlbe) - 1; 535 536 return get_tlb_raddr(gtlbe) | (eaddr & pgmask); 537 } 538 539 void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu) 540 { 541 } 542 543 /*****************************************/ 544 545 static void free_gtlb(struct kvmppc_vcpu_e500 *vcpu_e500) 546 { 547 int i; 548 549 kvmppc_core_flush_tlb(&vcpu_e500->vcpu); 550 kfree(vcpu_e500->g2h_tlb1_map); 551 kfree(vcpu_e500->gtlb_priv[0]); 552 kfree(vcpu_e500->gtlb_priv[1]); 553 554 if (vcpu_e500->shared_tlb_pages) { 555 vfree((void *)(round_down((uintptr_t)vcpu_e500->gtlb_arch, 556 PAGE_SIZE))); 557 558 for (i = 0; i < vcpu_e500->num_shared_tlb_pages; i++) { 559 set_page_dirty_lock(vcpu_e500->shared_tlb_pages[i]); 560 put_page(vcpu_e500->shared_tlb_pages[i]); 561 } 562 563 vcpu_e500->num_shared_tlb_pages = 0; 564 565 kfree(vcpu_e500->shared_tlb_pages); 566 vcpu_e500->shared_tlb_pages = NULL; 567 } else { 568 kfree(vcpu_e500->gtlb_arch); 569 } 570 571 vcpu_e500->gtlb_arch = NULL; 572 } 573 574 void kvmppc_get_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) 575 { 576 sregs->u.e.mas0 = vcpu->arch.shared->mas0; 577 sregs->u.e.mas1 = vcpu->arch.shared->mas1; 578 sregs->u.e.mas2 = vcpu->arch.shared->mas2; 579 sregs->u.e.mas7_3 = vcpu->arch.shared->mas7_3; 580 sregs->u.e.mas4 = vcpu->arch.shared->mas4; 581 sregs->u.e.mas6 = vcpu->arch.shared->mas6; 582 583 sregs->u.e.mmucfg = vcpu->arch.mmucfg; 584 sregs->u.e.tlbcfg[0] = vcpu->arch.tlbcfg[0]; 585 sregs->u.e.tlbcfg[1] = vcpu->arch.tlbcfg[1]; 586 sregs->u.e.tlbcfg[2] = 0; 587 sregs->u.e.tlbcfg[3] = 0; 588 } 589 590 int kvmppc_set_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) 591 { 592 if (sregs->u.e.features & KVM_SREGS_E_ARCH206_MMU) { 593 vcpu->arch.shared->mas0 = sregs->u.e.mas0; 594 vcpu->arch.shared->mas1 = sregs->u.e.mas1; 595 vcpu->arch.shared->mas2 = sregs->u.e.mas2; 596 vcpu->arch.shared->mas7_3 = sregs->u.e.mas7_3; 597 vcpu->arch.shared->mas4 = sregs->u.e.mas4; 598 vcpu->arch.shared->mas6 = sregs->u.e.mas6; 599 } 600 601 return 0; 602 } 603 604 int kvmppc_get_one_reg_e500_tlb(struct kvm_vcpu *vcpu, u64 id, 605 union kvmppc_one_reg *val) 606 { 607 int r = 0; 608 long int i; 609 610 switch (id) { 611 case KVM_REG_PPC_MAS0: 612 *val = get_reg_val(id, vcpu->arch.shared->mas0); 613 break; 614 case KVM_REG_PPC_MAS1: 615 *val = get_reg_val(id, vcpu->arch.shared->mas1); 616 break; 617 case KVM_REG_PPC_MAS2: 618 *val = get_reg_val(id, vcpu->arch.shared->mas2); 619 break; 620 case KVM_REG_PPC_MAS7_3: 621 *val = get_reg_val(id, vcpu->arch.shared->mas7_3); 622 break; 623 case KVM_REG_PPC_MAS4: 624 *val = get_reg_val(id, vcpu->arch.shared->mas4); 625 break; 626 case KVM_REG_PPC_MAS6: 627 *val = get_reg_val(id, vcpu->arch.shared->mas6); 628 break; 629 case KVM_REG_PPC_MMUCFG: 630 *val = get_reg_val(id, vcpu->arch.mmucfg); 631 break; 632 case KVM_REG_PPC_EPTCFG: 633 *val = get_reg_val(id, vcpu->arch.eptcfg); 634 break; 635 case KVM_REG_PPC_TLB0CFG: 636 case KVM_REG_PPC_TLB1CFG: 637 case KVM_REG_PPC_TLB2CFG: 638 case KVM_REG_PPC_TLB3CFG: 639 i = id - KVM_REG_PPC_TLB0CFG; 640 *val = get_reg_val(id, vcpu->arch.tlbcfg[i]); 641 break; 642 case KVM_REG_PPC_TLB0PS: 643 case KVM_REG_PPC_TLB1PS: 644 case KVM_REG_PPC_TLB2PS: 645 case KVM_REG_PPC_TLB3PS: 646 i = id - KVM_REG_PPC_TLB0PS; 647 *val = get_reg_val(id, vcpu->arch.tlbps[i]); 648 break; 649 default: 650 r = -EINVAL; 651 break; 652 } 653 654 return r; 655 } 656 657 int kvmppc_set_one_reg_e500_tlb(struct kvm_vcpu *vcpu, u64 id, 658 union kvmppc_one_reg *val) 659 { 660 int r = 0; 661 long int i; 662 663 switch (id) { 664 case KVM_REG_PPC_MAS0: 665 vcpu->arch.shared->mas0 = set_reg_val(id, *val); 666 break; 667 case KVM_REG_PPC_MAS1: 668 vcpu->arch.shared->mas1 = set_reg_val(id, *val); 669 break; 670 case KVM_REG_PPC_MAS2: 671 vcpu->arch.shared->mas2 = set_reg_val(id, *val); 672 break; 673 case KVM_REG_PPC_MAS7_3: 674 vcpu->arch.shared->mas7_3 = set_reg_val(id, *val); 675 break; 676 case KVM_REG_PPC_MAS4: 677 vcpu->arch.shared->mas4 = set_reg_val(id, *val); 678 break; 679 case KVM_REG_PPC_MAS6: 680 vcpu->arch.shared->mas6 = set_reg_val(id, *val); 681 break; 682 /* Only allow MMU registers to be set to the config supported by KVM */ 683 case KVM_REG_PPC_MMUCFG: { 684 u32 reg = set_reg_val(id, *val); 685 if (reg != vcpu->arch.mmucfg) 686 r = -EINVAL; 687 break; 688 } 689 case KVM_REG_PPC_EPTCFG: { 690 u32 reg = set_reg_val(id, *val); 691 if (reg != vcpu->arch.eptcfg) 692 r = -EINVAL; 693 break; 694 } 695 case KVM_REG_PPC_TLB0CFG: 696 case KVM_REG_PPC_TLB1CFG: 697 case KVM_REG_PPC_TLB2CFG: 698 case KVM_REG_PPC_TLB3CFG: { 699 /* MMU geometry (N_ENTRY/ASSOC) can be set only using SW_TLB */ 700 u32 reg = set_reg_val(id, *val); 701 i = id - KVM_REG_PPC_TLB0CFG; 702 if (reg != vcpu->arch.tlbcfg[i]) 703 r = -EINVAL; 704 break; 705 } 706 case KVM_REG_PPC_TLB0PS: 707 case KVM_REG_PPC_TLB1PS: 708 case KVM_REG_PPC_TLB2PS: 709 case KVM_REG_PPC_TLB3PS: { 710 u32 reg = set_reg_val(id, *val); 711 i = id - KVM_REG_PPC_TLB0PS; 712 if (reg != vcpu->arch.tlbps[i]) 713 r = -EINVAL; 714 break; 715 } 716 default: 717 r = -EINVAL; 718 break; 719 } 720 721 return r; 722 } 723 724 static int vcpu_mmu_geometry_update(struct kvm_vcpu *vcpu, 725 struct kvm_book3e_206_tlb_params *params) 726 { 727 vcpu->arch.tlbcfg[0] &= ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC); 728 if (params->tlb_sizes[0] <= 2048) 729 vcpu->arch.tlbcfg[0] |= params->tlb_sizes[0]; 730 vcpu->arch.tlbcfg[0] |= params->tlb_ways[0] << TLBnCFG_ASSOC_SHIFT; 731 732 vcpu->arch.tlbcfg[1] &= ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC); 733 vcpu->arch.tlbcfg[1] |= params->tlb_sizes[1]; 734 vcpu->arch.tlbcfg[1] |= params->tlb_ways[1] << TLBnCFG_ASSOC_SHIFT; 735 return 0; 736 } 737 738 int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu, 739 struct kvm_config_tlb *cfg) 740 { 741 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 742 struct kvm_book3e_206_tlb_params params; 743 char *virt; 744 struct page **pages; 745 struct tlbe_priv *privs[2] = {}; 746 u64 *g2h_bitmap = NULL; 747 size_t array_len; 748 u32 sets; 749 int num_pages, ret, i; 750 751 if (cfg->mmu_type != KVM_MMU_FSL_BOOKE_NOHV) 752 return -EINVAL; 753 754 if (copy_from_user(¶ms, (void __user *)(uintptr_t)cfg->params, 755 sizeof(params))) 756 return -EFAULT; 757 758 if (params.tlb_sizes[1] > 64) 759 return -EINVAL; 760 if (params.tlb_ways[1] != params.tlb_sizes[1]) 761 return -EINVAL; 762 if (params.tlb_sizes[2] != 0 || params.tlb_sizes[3] != 0) 763 return -EINVAL; 764 if (params.tlb_ways[2] != 0 || params.tlb_ways[3] != 0) 765 return -EINVAL; 766 767 if (!is_power_of_2(params.tlb_ways[0])) 768 return -EINVAL; 769 770 sets = params.tlb_sizes[0] >> ilog2(params.tlb_ways[0]); 771 if (!is_power_of_2(sets)) 772 return -EINVAL; 773 774 array_len = params.tlb_sizes[0] + params.tlb_sizes[1]; 775 array_len *= sizeof(struct kvm_book3e_206_tlb_entry); 776 777 if (cfg->array_len < array_len) 778 return -EINVAL; 779 780 num_pages = DIV_ROUND_UP(cfg->array + array_len - 1, PAGE_SIZE) - 781 cfg->array / PAGE_SIZE; 782 pages = kmalloc(sizeof(struct page *) * num_pages, GFP_KERNEL); 783 if (!pages) 784 return -ENOMEM; 785 786 ret = get_user_pages_fast(cfg->array, num_pages, 1, pages); 787 if (ret < 0) 788 goto err_pages; 789 790 if (ret != num_pages) { 791 num_pages = ret; 792 ret = -EFAULT; 793 goto err_put_page; 794 } 795 796 virt = vmap(pages, num_pages, VM_MAP, PAGE_KERNEL); 797 if (!virt) { 798 ret = -ENOMEM; 799 goto err_put_page; 800 } 801 802 privs[0] = kzalloc(sizeof(struct tlbe_priv) * params.tlb_sizes[0], 803 GFP_KERNEL); 804 privs[1] = kzalloc(sizeof(struct tlbe_priv) * params.tlb_sizes[1], 805 GFP_KERNEL); 806 807 if (!privs[0] || !privs[1]) { 808 ret = -ENOMEM; 809 goto err_privs; 810 } 811 812 g2h_bitmap = kzalloc(sizeof(u64) * params.tlb_sizes[1], 813 GFP_KERNEL); 814 if (!g2h_bitmap) { 815 ret = -ENOMEM; 816 goto err_privs; 817 } 818 819 free_gtlb(vcpu_e500); 820 821 vcpu_e500->gtlb_priv[0] = privs[0]; 822 vcpu_e500->gtlb_priv[1] = privs[1]; 823 vcpu_e500->g2h_tlb1_map = g2h_bitmap; 824 825 vcpu_e500->gtlb_arch = (struct kvm_book3e_206_tlb_entry *) 826 (virt + (cfg->array & (PAGE_SIZE - 1))); 827 828 vcpu_e500->gtlb_params[0].entries = params.tlb_sizes[0]; 829 vcpu_e500->gtlb_params[1].entries = params.tlb_sizes[1]; 830 831 vcpu_e500->gtlb_offset[0] = 0; 832 vcpu_e500->gtlb_offset[1] = params.tlb_sizes[0]; 833 834 /* Update vcpu's MMU geometry based on SW_TLB input */ 835 vcpu_mmu_geometry_update(vcpu, ¶ms); 836 837 vcpu_e500->shared_tlb_pages = pages; 838 vcpu_e500->num_shared_tlb_pages = num_pages; 839 840 vcpu_e500->gtlb_params[0].ways = params.tlb_ways[0]; 841 vcpu_e500->gtlb_params[0].sets = sets; 842 843 vcpu_e500->gtlb_params[1].ways = params.tlb_sizes[1]; 844 vcpu_e500->gtlb_params[1].sets = 1; 845 846 kvmppc_recalc_tlb1map_range(vcpu_e500); 847 return 0; 848 849 err_privs: 850 kfree(privs[0]); 851 kfree(privs[1]); 852 853 err_put_page: 854 for (i = 0; i < num_pages; i++) 855 put_page(pages[i]); 856 857 err_pages: 858 kfree(pages); 859 return ret; 860 } 861 862 int kvm_vcpu_ioctl_dirty_tlb(struct kvm_vcpu *vcpu, 863 struct kvm_dirty_tlb *dirty) 864 { 865 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 866 kvmppc_recalc_tlb1map_range(vcpu_e500); 867 kvmppc_core_flush_tlb(vcpu); 868 return 0; 869 } 870 871 /* Vcpu's MMU default configuration */ 872 static int vcpu_mmu_init(struct kvm_vcpu *vcpu, 873 struct kvmppc_e500_tlb_params *params) 874 { 875 /* Initialize RASIZE, PIDSIZE, NTLBS and MAVN fields with host values*/ 876 vcpu->arch.mmucfg = mfspr(SPRN_MMUCFG) & ~MMUCFG_LPIDSIZE; 877 878 /* Initialize TLBnCFG fields with host values and SW_TLB geometry*/ 879 vcpu->arch.tlbcfg[0] = mfspr(SPRN_TLB0CFG) & 880 ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC); 881 vcpu->arch.tlbcfg[0] |= params[0].entries; 882 vcpu->arch.tlbcfg[0] |= params[0].ways << TLBnCFG_ASSOC_SHIFT; 883 884 vcpu->arch.tlbcfg[1] = mfspr(SPRN_TLB1CFG) & 885 ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC); 886 vcpu->arch.tlbcfg[1] |= params[1].entries; 887 vcpu->arch.tlbcfg[1] |= params[1].ways << TLBnCFG_ASSOC_SHIFT; 888 889 if (has_feature(vcpu, VCPU_FTR_MMU_V2)) { 890 vcpu->arch.tlbps[0] = mfspr(SPRN_TLB0PS); 891 vcpu->arch.tlbps[1] = mfspr(SPRN_TLB1PS); 892 893 vcpu->arch.mmucfg &= ~MMUCFG_LRAT; 894 895 /* Guest mmu emulation currently doesn't handle E.PT */ 896 vcpu->arch.eptcfg = 0; 897 vcpu->arch.tlbcfg[0] &= ~TLBnCFG_PT; 898 vcpu->arch.tlbcfg[1] &= ~TLBnCFG_IND; 899 } 900 901 return 0; 902 } 903 904 int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500) 905 { 906 struct kvm_vcpu *vcpu = &vcpu_e500->vcpu; 907 int entry_size = sizeof(struct kvm_book3e_206_tlb_entry); 908 int entries = KVM_E500_TLB0_SIZE + KVM_E500_TLB1_SIZE; 909 910 if (e500_mmu_host_init(vcpu_e500)) 911 goto err; 912 913 vcpu_e500->gtlb_params[0].entries = KVM_E500_TLB0_SIZE; 914 vcpu_e500->gtlb_params[1].entries = KVM_E500_TLB1_SIZE; 915 916 vcpu_e500->gtlb_params[0].ways = KVM_E500_TLB0_WAY_NUM; 917 vcpu_e500->gtlb_params[0].sets = 918 KVM_E500_TLB0_SIZE / KVM_E500_TLB0_WAY_NUM; 919 920 vcpu_e500->gtlb_params[1].ways = KVM_E500_TLB1_SIZE; 921 vcpu_e500->gtlb_params[1].sets = 1; 922 923 vcpu_e500->gtlb_arch = kmalloc(entries * entry_size, GFP_KERNEL); 924 if (!vcpu_e500->gtlb_arch) 925 return -ENOMEM; 926 927 vcpu_e500->gtlb_offset[0] = 0; 928 vcpu_e500->gtlb_offset[1] = KVM_E500_TLB0_SIZE; 929 930 vcpu_e500->gtlb_priv[0] = kzalloc(sizeof(struct tlbe_ref) * 931 vcpu_e500->gtlb_params[0].entries, 932 GFP_KERNEL); 933 if (!vcpu_e500->gtlb_priv[0]) 934 goto err; 935 936 vcpu_e500->gtlb_priv[1] = kzalloc(sizeof(struct tlbe_ref) * 937 vcpu_e500->gtlb_params[1].entries, 938 GFP_KERNEL); 939 if (!vcpu_e500->gtlb_priv[1]) 940 goto err; 941 942 vcpu_e500->g2h_tlb1_map = kzalloc(sizeof(u64) * 943 vcpu_e500->gtlb_params[1].entries, 944 GFP_KERNEL); 945 if (!vcpu_e500->g2h_tlb1_map) 946 goto err; 947 948 vcpu_mmu_init(vcpu, vcpu_e500->gtlb_params); 949 950 kvmppc_recalc_tlb1map_range(vcpu_e500); 951 return 0; 952 953 err: 954 free_gtlb(vcpu_e500); 955 return -1; 956 } 957 958 void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500) 959 { 960 free_gtlb(vcpu_e500); 961 e500_mmu_host_uninit(vcpu_e500); 962 } 963