kernel/arch/powerpc/kvm/e500_mmu.c

   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_booke.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                 gva_t 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_e500(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(&params, (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, &params);
 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 }