arch/powerpc/kvm/e500_emulate.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All rights reserved.
   4  *
   5  * Author: Yu Liu, <yu.liu@freescale.com>
   6  *
   7  * Description:
   8  * This file is derived from arch/powerpc/kvm/44x_emulate.c,
   9  * by Hollis Blanchard <hollisb@us.ibm.com>.
  10  */
  11
  12 #include <asm/kvm_ppc.h>
  13 #include <asm/disassemble.h>
  14 #include <asm/dbell.h>
  15 #include <asm/reg_booke.h>
  16
  17 #include "booke.h"
  18 #include "e500.h"
  19
  20 #define XOP_DCBTLS  166
  21 #define XOP_MSGSND  206
  22 #define XOP_MSGCLR  238
  23 #define XOP_MFTMR   366
  24 #define XOP_TLBIVAX 786
  25 #define XOP_TLBSX   914
  26 #define XOP_TLBRE   946
  27 #define XOP_TLBWE   978
  28 #define XOP_TLBILX  18
  29 #define XOP_EHPRIV  270
  30
  31 #ifdef CONFIG_KVM_E500MC
  32 static int dbell2prio(ulong param)
  33 {
  34         int msg = param & PPC_DBELL_TYPE_MASK;
  35         int prio = -1;
  36
  37         switch (msg) {
  38         case PPC_DBELL_TYPE(PPC_DBELL):
  39                 prio = BOOKE_IRQPRIO_DBELL;
  40                 break;
  41         case PPC_DBELL_TYPE(PPC_DBELL_CRIT):
  42                 prio = BOOKE_IRQPRIO_DBELL_CRIT;
  43                 break;
  44         default:
  45                 break;
  46         }
  47
  48         return prio;
  49 }
  50
  51 static int kvmppc_e500_emul_msgclr(struct kvm_vcpu *vcpu, int rb)
  52 {
  53         ulong param = vcpu->arch.regs.gpr[rb];
  54         int prio = dbell2prio(param);
  55
  56         if (prio < 0)
  57                 return EMULATE_FAIL;
  58
  59         clear_bit(prio, &vcpu->arch.pending_exceptions);
  60         return EMULATE_DONE;
  61 }
  62
  63 static int kvmppc_e500_emul_msgsnd(struct kvm_vcpu *vcpu, int rb)
  64 {
  65         ulong param = vcpu->arch.regs.gpr[rb];
  66         int prio = dbell2prio(rb);
  67         int pir = param & PPC_DBELL_PIR_MASK;
  68         int i;
  69         struct kvm_vcpu *cvcpu;
  70
  71         if (prio < 0)
  72                 return EMULATE_FAIL;
  73
  74         kvm_for_each_vcpu(i, cvcpu, vcpu->kvm) {
  75                 int cpir = cvcpu->arch.shared->pir;
  76                 if ((param & PPC_DBELL_MSG_BRDCAST) || (cpir == pir)) {
  77                         set_bit(prio, &cvcpu->arch.pending_exceptions);
  78                         kvm_vcpu_kick(cvcpu);
  79                 }
  80         }
  81
  82         return EMULATE_DONE;
  83 }
  84 #endif
  85
  86 static int kvmppc_e500_emul_ehpriv(struct kvm_run *run, struct kvm_vcpu *vcpu,
  87                                    unsigned int inst, int *advance)
  88 {
  89         int emulated = EMULATE_DONE;
  90
  91         switch (get_oc(inst)) {
  92         case EHPRIV_OC_DEBUG:
  93                 run->exit_reason = KVM_EXIT_DEBUG;
  94                 run->debug.arch.address = vcpu->arch.regs.nip;
  95                 run->debug.arch.status = 0;
  96                 kvmppc_account_exit(vcpu, DEBUG_EXITS);
  97                 emulated = EMULATE_EXIT_USER;
  98                 *advance = 0;
  99                 break;
 100         default:
 101                 emulated = EMULATE_FAIL;
 102         }
 103         return emulated;
 104 }
 105
 106 static int kvmppc_e500_emul_dcbtls(struct kvm_vcpu *vcpu)
 107 {
 108         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
 109
 110         /* Always fail to lock the cache */
 111         vcpu_e500->l1csr0 |= L1CSR0_CUL;
 112         return EMULATE_DONE;
 113 }
 114
 115 static int kvmppc_e500_emul_mftmr(struct kvm_vcpu *vcpu, unsigned int inst,
 116                                   int rt)
 117 {
 118         /* Expose one thread per vcpu */
 119         if (get_tmrn(inst) == TMRN_TMCFG0) {
 120                 kvmppc_set_gpr(vcpu, rt,
 121                                1 | (1 << TMRN_TMCFG0_NATHRD_SHIFT));
 122                 return EMULATE_DONE;
 123         }
 124
 125         return EMULATE_FAIL;
 126 }
 127
 128 int kvmppc_core_emulate_op_e500(struct kvm_run *run, struct kvm_vcpu *vcpu,
 129                                 unsigned int inst, int *advance)
 130 {
 131         int emulated = EMULATE_DONE;
 132         int ra = get_ra(inst);
 133         int rb = get_rb(inst);
 134         int rt = get_rt(inst);
 135         gva_t ea;
 136
 137         switch (get_op(inst)) {
 138         case 31:
 139                 switch (get_xop(inst)) {
 140
 141                 case XOP_DCBTLS:
 142                         emulated = kvmppc_e500_emul_dcbtls(vcpu);
 143                         break;
 144
 145 #ifdef CONFIG_KVM_E500MC
 146                 case XOP_MSGSND:
 147                         emulated = kvmppc_e500_emul_msgsnd(vcpu, rb);
 148                         break;
 149
 150                 case XOP_MSGCLR:
 151                         emulated = kvmppc_e500_emul_msgclr(vcpu, rb);
 152                         break;
 153 #endif
 154
 155                 case XOP_TLBRE:
 156                         emulated = kvmppc_e500_emul_tlbre(vcpu);
 157                         break;
 158
 159                 case XOP_TLBWE:
 160                         emulated = kvmppc_e500_emul_tlbwe(vcpu);
 161                         break;
 162
 163                 case XOP_TLBSX:
 164                         ea = kvmppc_get_ea_indexed(vcpu, ra, rb);
 165                         emulated = kvmppc_e500_emul_tlbsx(vcpu, ea);
 166                         break;
 167
 168                 case XOP_TLBILX: {
 169                         int type = rt & 0x3;
 170                         ea = kvmppc_get_ea_indexed(vcpu, ra, rb);
 171                         emulated = kvmppc_e500_emul_tlbilx(vcpu, type, ea);
 172                         break;
 173                 }
 174
 175                 case XOP_TLBIVAX:
 176                         ea = kvmppc_get_ea_indexed(vcpu, ra, rb);
 177                         emulated = kvmppc_e500_emul_tlbivax(vcpu, ea);
 178                         break;
 179
 180                 case XOP_MFTMR:
 181                         emulated = kvmppc_e500_emul_mftmr(vcpu, inst, rt);
 182                         break;
 183
 184                 case XOP_EHPRIV:
 185                         emulated = kvmppc_e500_emul_ehpriv(run, vcpu, inst,
 186                                                            advance);
 187                         break;
 188
 189                 default:
 190                         emulated = EMULATE_FAIL;
 191                 }
 192
 193                 break;
 194
 195         default:
 196                 emulated = EMULATE_FAIL;
 197         }
 198
 199         if (emulated == EMULATE_FAIL)
 200                 emulated = kvmppc_booke_emulate_op(run, vcpu, inst, advance);
 201
 202         return emulated;
 203 }
 204
 205 int kvmppc_core_emulate_mtspr_e500(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
 206 {
 207         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
 208         int emulated = EMULATE_DONE;
 209
 210         switch (sprn) {
 211 #ifndef CONFIG_KVM_BOOKE_HV
 212         case SPRN_PID:
 213                 kvmppc_set_pid(vcpu, spr_val);
 214                 break;
 215         case SPRN_PID1:
 216                 if (spr_val != 0)
 217                         return EMULATE_FAIL;
 218                 vcpu_e500->pid[1] = spr_val;
 219                 break;
 220         case SPRN_PID2:
 221                 if (spr_val != 0)
 222                         return EMULATE_FAIL;
 223                 vcpu_e500->pid[2] = spr_val;
 224                 break;
 225         case SPRN_MAS0:
 226                 vcpu->arch.shared->mas0 = spr_val;
 227                 break;
 228         case SPRN_MAS1:
 229                 vcpu->arch.shared->mas1 = spr_val;
 230                 break;
 231         case SPRN_MAS2:
 232                 vcpu->arch.shared->mas2 = spr_val;
 233                 break;
 234         case SPRN_MAS3:
 235                 vcpu->arch.shared->mas7_3 &= ~(u64)0xffffffff;
 236                 vcpu->arch.shared->mas7_3 |= spr_val;
 237                 break;
 238         case SPRN_MAS4:
 239                 vcpu->arch.shared->mas4 = spr_val;
 240                 break;
 241         case SPRN_MAS6:
 242                 vcpu->arch.shared->mas6 = spr_val;
 243                 break;
 244         case SPRN_MAS7:
 245                 vcpu->arch.shared->mas7_3 &= (u64)0xffffffff;
 246                 vcpu->arch.shared->mas7_3 |= (u64)spr_val << 32;
 247                 break;
 248 #endif
 249         case SPRN_L1CSR0:
 250                 vcpu_e500->l1csr0 = spr_val;
 251                 vcpu_e500->l1csr0 &= ~(L1CSR0_DCFI | L1CSR0_CLFC);
 252                 break;
 253         case SPRN_L1CSR1:
 254                 vcpu_e500->l1csr1 = spr_val;
 255                 vcpu_e500->l1csr1 &= ~(L1CSR1_ICFI | L1CSR1_ICLFR);
 256                 break;
 257         case SPRN_HID0:
 258                 vcpu_e500->hid0 = spr_val;
 259                 break;
 260         case SPRN_HID1:
 261                 vcpu_e500->hid1 = spr_val;
 262                 break;
 263
 264         case SPRN_MMUCSR0:
 265                 emulated = kvmppc_e500_emul_mt_mmucsr0(vcpu_e500,
 266                                 spr_val);
 267                 break;
 268
 269         case SPRN_PWRMGTCR0:
 270                 /*
 271                  * Guest relies on host power management configurations
 272                  * Treat the request as a general store
 273                  */
 274                 vcpu->arch.pwrmgtcr0 = spr_val;
 275                 break;
 276
 277         case SPRN_BUCSR:
 278                 /*
 279                  * If we are here, it means that we have already flushed the
 280                  * branch predictor, so just return to guest.
 281                  */
 282                 break;
 283
 284         /* extra exceptions */
 285 #ifdef CONFIG_SPE_POSSIBLE
 286         case SPRN_IVOR32:
 287                 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL] = spr_val;
 288                 break;
 289         case SPRN_IVOR33:
 290                 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA] = spr_val;
 291                 break;
 292         case SPRN_IVOR34:
 293                 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND] = spr_val;
 294                 break;
 295 #endif
 296 #ifdef CONFIG_ALTIVEC
 297         case SPRN_IVOR32:
 298                 vcpu->arch.ivor[BOOKE_IRQPRIO_ALTIVEC_UNAVAIL] = spr_val;
 299                 break;
 300         case SPRN_IVOR33:
 301                 vcpu->arch.ivor[BOOKE_IRQPRIO_ALTIVEC_ASSIST] = spr_val;
 302                 break;
 303 #endif
 304         case SPRN_IVOR35:
 305                 vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR] = spr_val;
 306                 break;
 307 #ifdef CONFIG_KVM_BOOKE_HV
 308         case SPRN_IVOR36:
 309                 vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL] = spr_val;
 310                 break;
 311         case SPRN_IVOR37:
 312                 vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL_CRIT] = spr_val;
 313                 break;
 314 #endif
 315         default:
 316                 emulated = kvmppc_booke_emulate_mtspr(vcpu, sprn, spr_val);
 317         }
 318
 319         return emulated;
 320 }
 321
 322 int kvmppc_core_emulate_mfspr_e500(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val)
 323 {
 324         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
 325         int emulated = EMULATE_DONE;
 326
 327         switch (sprn) {
 328 #ifndef CONFIG_KVM_BOOKE_HV
 329         case SPRN_PID:
 330                 *spr_val = vcpu_e500->pid[0];
 331                 break;
 332         case SPRN_PID1:
 333                 *spr_val = vcpu_e500->pid[1];
 334                 break;
 335         case SPRN_PID2:
 336                 *spr_val = vcpu_e500->pid[2];
 337                 break;
 338         case SPRN_MAS0:
 339                 *spr_val = vcpu->arch.shared->mas0;
 340                 break;
 341         case SPRN_MAS1:
 342                 *spr_val = vcpu->arch.shared->mas1;
 343                 break;
 344         case SPRN_MAS2:
 345                 *spr_val = vcpu->arch.shared->mas2;
 346                 break;
 347         case SPRN_MAS3:
 348                 *spr_val = (u32)vcpu->arch.shared->mas7_3;
 349                 break;
 350         case SPRN_MAS4:
 351                 *spr_val = vcpu->arch.shared->mas4;
 352                 break;
 353         case SPRN_MAS6:
 354                 *spr_val = vcpu->arch.shared->mas6;
 355                 break;
 356         case SPRN_MAS7:
 357                 *spr_val = vcpu->arch.shared->mas7_3 >> 32;
 358                 break;
 359 #endif
 360         case SPRN_DECAR:
 361                 *spr_val = vcpu->arch.decar;
 362                 break;
 363         case SPRN_TLB0CFG:
 364                 *spr_val = vcpu->arch.tlbcfg[0];
 365                 break;
 366         case SPRN_TLB1CFG:
 367                 *spr_val = vcpu->arch.tlbcfg[1];
 368                 break;
 369         case SPRN_TLB0PS:
 370                 if (!has_feature(vcpu, VCPU_FTR_MMU_V2))
 371                         return EMULATE_FAIL;
 372                 *spr_val = vcpu->arch.tlbps[0];
 373                 break;
 374         case SPRN_TLB1PS:
 375                 if (!has_feature(vcpu, VCPU_FTR_MMU_V2))
 376                         return EMULATE_FAIL;
 377                 *spr_val = vcpu->arch.tlbps[1];
 378                 break;
 379         case SPRN_L1CSR0:
 380                 *spr_val = vcpu_e500->l1csr0;
 381                 break;
 382         case SPRN_L1CSR1:
 383                 *spr_val = vcpu_e500->l1csr1;
 384                 break;
 385         case SPRN_HID0:
 386                 *spr_val = vcpu_e500->hid0;
 387                 break;
 388         case SPRN_HID1:
 389                 *spr_val = vcpu_e500->hid1;
 390                 break;
 391         case SPRN_SVR:
 392                 *spr_val = vcpu_e500->svr;
 393                 break;
 394
 395         case SPRN_MMUCSR0:
 396                 *spr_val = 0;
 397                 break;
 398
 399         case SPRN_MMUCFG:
 400                 *spr_val = vcpu->arch.mmucfg;
 401                 break;
 402         case SPRN_EPTCFG:
 403                 if (!has_feature(vcpu, VCPU_FTR_MMU_V2))
 404                         return EMULATE_FAIL;
 405                 /*
 406                  * Legacy Linux guests access EPTCFG register even if the E.PT
 407                  * category is disabled in the VM. Give them a chance to live.
 408                  */
 409                 *spr_val = vcpu->arch.eptcfg;
 410                 break;
 411
 412         case SPRN_PWRMGTCR0:
 413                 *spr_val = vcpu->arch.pwrmgtcr0;
 414                 break;
 415
 416         /* extra exceptions */
 417 #ifdef CONFIG_SPE_POSSIBLE
 418         case SPRN_IVOR32:
 419                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL];
 420                 break;
 421         case SPRN_IVOR33:
 422                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA];
 423                 break;
 424         case SPRN_IVOR34:
 425                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND];
 426                 break;
 427 #endif
 428 #ifdef CONFIG_ALTIVEC
 429         case SPRN_IVOR32:
 430                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_ALTIVEC_UNAVAIL];
 431                 break;
 432         case SPRN_IVOR33:
 433                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_ALTIVEC_ASSIST];
 434                 break;
 435 #endif
 436         case SPRN_IVOR35:
 437                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR];
 438                 break;
 439 #ifdef CONFIG_KVM_BOOKE_HV
 440         case SPRN_IVOR36:
 441                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL];
 442                 break;
 443         case SPRN_IVOR37:
 444                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL_CRIT];
 445                 break;
 446 #endif
 447         default:
 448                 emulated = kvmppc_booke_emulate_mfspr(vcpu, sprn, spr_val);
 449         }
 450
 451         return emulated;
 452 }
 453