arch/powerpc/kvm/e500_emulate.c

   1 /*
   2  * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All rights reserved.
   3  *
   4  * Author: Yu Liu, <yu.liu@freescale.com>
   5  *
   6  * Description:
   7  * This file is derived from arch/powerpc/kvm/44x_emulate.c,
   8  * by Hollis Blanchard <hollisb@us.ibm.com>.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License, version 2, as
  12  * published by the Free Software Foundation.
  13  */
  14
  15 #include <asm/kvm_ppc.h>
  16 #include <asm/disassemble.h>
  17 #include <asm/dbell.h>
  18
  19 #include "booke.h"
  20 #include "e500.h"
  21
  22 #define XOP_MSGSND  206
  23 #define XOP_MSGCLR  238
  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.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.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.pc;
  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 int kvmppc_core_emulate_op_e500(struct kvm_run *run, struct kvm_vcpu *vcpu,
 107                                 unsigned int inst, int *advance)
 108 {
 109         int emulated = EMULATE_DONE;
 110         int ra = get_ra(inst);
 111         int rb = get_rb(inst);
 112         int rt = get_rt(inst);
 113         gva_t ea;
 114
 115         switch (get_op(inst)) {
 116         case 31:
 117                 switch (get_xop(inst)) {
 118
 119 #ifdef CONFIG_KVM_E500MC
 120                 case XOP_MSGSND:
 121                         emulated = kvmppc_e500_emul_msgsnd(vcpu, rb);
 122                         break;
 123
 124                 case XOP_MSGCLR:
 125                         emulated = kvmppc_e500_emul_msgclr(vcpu, rb);
 126                         break;
 127 #endif
 128
 129                 case XOP_TLBRE:
 130                         emulated = kvmppc_e500_emul_tlbre(vcpu);
 131                         break;
 132
 133                 case XOP_TLBWE:
 134                         emulated = kvmppc_e500_emul_tlbwe(vcpu);
 135                         break;
 136
 137                 case XOP_TLBSX:
 138                         ea = kvmppc_get_ea_indexed(vcpu, ra, rb);
 139                         emulated = kvmppc_e500_emul_tlbsx(vcpu, ea);
 140                         break;
 141
 142                 case XOP_TLBILX: {
 143                         int type = rt & 0x3;
 144                         ea = kvmppc_get_ea_indexed(vcpu, ra, rb);
 145                         emulated = kvmppc_e500_emul_tlbilx(vcpu, type, ea);
 146                         break;
 147                 }
 148
 149                 case XOP_TLBIVAX:
 150                         ea = kvmppc_get_ea_indexed(vcpu, ra, rb);
 151                         emulated = kvmppc_e500_emul_tlbivax(vcpu, ea);
 152                         break;
 153
 154                 case XOP_EHPRIV:
 155                         emulated = kvmppc_e500_emul_ehpriv(run, vcpu, inst,
 156                                                            advance);
 157                         break;
 158
 159                 default:
 160                         emulated = EMULATE_FAIL;
 161                 }
 162
 163                 break;
 164
 165         default:
 166                 emulated = EMULATE_FAIL;
 167         }
 168
 169         if (emulated == EMULATE_FAIL)
 170                 emulated = kvmppc_booke_emulate_op(run, vcpu, inst, advance);
 171
 172         return emulated;
 173 }
 174
 175 int kvmppc_core_emulate_mtspr_e500(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
 176 {
 177         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
 178         int emulated = EMULATE_DONE;
 179
 180         switch (sprn) {
 181 #ifndef CONFIG_KVM_BOOKE_HV
 182         case SPRN_PID:
 183                 kvmppc_set_pid(vcpu, spr_val);
 184                 break;
 185         case SPRN_PID1:
 186                 if (spr_val != 0)
 187                         return EMULATE_FAIL;
 188                 vcpu_e500->pid[1] = spr_val;
 189                 break;
 190         case SPRN_PID2:
 191                 if (spr_val != 0)
 192                         return EMULATE_FAIL;
 193                 vcpu_e500->pid[2] = spr_val;
 194                 break;
 195         case SPRN_MAS0:
 196                 vcpu->arch.shared->mas0 = spr_val;
 197                 break;
 198         case SPRN_MAS1:
 199                 vcpu->arch.shared->mas1 = spr_val;
 200                 break;
 201         case SPRN_MAS2:
 202                 vcpu->arch.shared->mas2 = spr_val;
 203                 break;
 204         case SPRN_MAS3:
 205                 vcpu->arch.shared->mas7_3 &= ~(u64)0xffffffff;
 206                 vcpu->arch.shared->mas7_3 |= spr_val;
 207                 break;
 208         case SPRN_MAS4:
 209                 vcpu->arch.shared->mas4 = spr_val;
 210                 break;
 211         case SPRN_MAS6:
 212                 vcpu->arch.shared->mas6 = spr_val;
 213                 break;
 214         case SPRN_MAS7:
 215                 vcpu->arch.shared->mas7_3 &= (u64)0xffffffff;
 216                 vcpu->arch.shared->mas7_3 |= (u64)spr_val << 32;
 217                 break;
 218 #endif
 219         case SPRN_L1CSR0:
 220                 vcpu_e500->l1csr0 = spr_val;
 221                 vcpu_e500->l1csr0 &= ~(L1CSR0_DCFI | L1CSR0_CLFC);
 222                 break;
 223         case SPRN_L1CSR1:
 224                 vcpu_e500->l1csr1 = spr_val;
 225                 break;
 226         case SPRN_HID0:
 227                 vcpu_e500->hid0 = spr_val;
 228                 break;
 229         case SPRN_HID1:
 230                 vcpu_e500->hid1 = spr_val;
 231                 break;
 232
 233         case SPRN_MMUCSR0:
 234                 emulated = kvmppc_e500_emul_mt_mmucsr0(vcpu_e500,
 235                                 spr_val);
 236                 break;
 237
 238         /* extra exceptions */
 239         case SPRN_IVOR32:
 240                 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL] = spr_val;
 241                 break;
 242         case SPRN_IVOR33:
 243                 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA] = spr_val;
 244                 break;
 245         case SPRN_IVOR34:
 246                 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND] = spr_val;
 247                 break;
 248         case SPRN_IVOR35:
 249                 vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR] = spr_val;
 250                 break;
 251 #ifdef CONFIG_KVM_BOOKE_HV
 252         case SPRN_IVOR36:
 253                 vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL] = spr_val;
 254                 break;
 255         case SPRN_IVOR37:
 256                 vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL_CRIT] = spr_val;
 257                 break;
 258 #endif
 259         default:
 260                 emulated = kvmppc_booke_emulate_mtspr(vcpu, sprn, spr_val);
 261         }
 262
 263         return emulated;
 264 }
 265
 266 int kvmppc_core_emulate_mfspr_e500(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val)
 267 {
 268         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
 269         int emulated = EMULATE_DONE;
 270
 271         switch (sprn) {
 272 #ifndef CONFIG_KVM_BOOKE_HV
 273         case SPRN_PID:
 274                 *spr_val = vcpu_e500->pid[0];
 275                 break;
 276         case SPRN_PID1:
 277                 *spr_val = vcpu_e500->pid[1];
 278                 break;
 279         case SPRN_PID2:
 280                 *spr_val = vcpu_e500->pid[2];
 281                 break;
 282         case SPRN_MAS0:
 283                 *spr_val = vcpu->arch.shared->mas0;
 284                 break;
 285         case SPRN_MAS1:
 286                 *spr_val = vcpu->arch.shared->mas1;
 287                 break;
 288         case SPRN_MAS2:
 289                 *spr_val = vcpu->arch.shared->mas2;
 290                 break;
 291         case SPRN_MAS3:
 292                 *spr_val = (u32)vcpu->arch.shared->mas7_3;
 293                 break;
 294         case SPRN_MAS4:
 295                 *spr_val = vcpu->arch.shared->mas4;
 296                 break;
 297         case SPRN_MAS6:
 298                 *spr_val = vcpu->arch.shared->mas6;
 299                 break;
 300         case SPRN_MAS7:
 301                 *spr_val = vcpu->arch.shared->mas7_3 >> 32;
 302                 break;
 303 #endif
 304         case SPRN_DECAR:
 305                 *spr_val = vcpu->arch.decar;
 306                 break;
 307         case SPRN_TLB0CFG:
 308                 *spr_val = vcpu->arch.tlbcfg[0];
 309                 break;
 310         case SPRN_TLB1CFG:
 311                 *spr_val = vcpu->arch.tlbcfg[1];
 312                 break;
 313         case SPRN_TLB0PS:
 314                 if (!has_feature(vcpu, VCPU_FTR_MMU_V2))
 315                         return EMULATE_FAIL;
 316                 *spr_val = vcpu->arch.tlbps[0];
 317                 break;
 318         case SPRN_TLB1PS:
 319                 if (!has_feature(vcpu, VCPU_FTR_MMU_V2))
 320                         return EMULATE_FAIL;
 321                 *spr_val = vcpu->arch.tlbps[1];
 322                 break;
 323         case SPRN_L1CSR0:
 324                 *spr_val = vcpu_e500->l1csr0;
 325                 break;
 326         case SPRN_L1CSR1:
 327                 *spr_val = vcpu_e500->l1csr1;
 328                 break;
 329         case SPRN_HID0:
 330                 *spr_val = vcpu_e500->hid0;
 331                 break;
 332         case SPRN_HID1:
 333                 *spr_val = vcpu_e500->hid1;
 334                 break;
 335         case SPRN_SVR:
 336                 *spr_val = vcpu_e500->svr;
 337                 break;
 338
 339         case SPRN_MMUCSR0:
 340                 *spr_val = 0;
 341                 break;
 342
 343         case SPRN_MMUCFG:
 344                 *spr_val = vcpu->arch.mmucfg;
 345                 break;
 346         case SPRN_EPTCFG:
 347                 if (!has_feature(vcpu, VCPU_FTR_MMU_V2))
 348                         return EMULATE_FAIL;
 349                 /*
 350                  * Legacy Linux guests access EPTCFG register even if the E.PT
 351                  * category is disabled in the VM. Give them a chance to live.
 352                  */
 353                 *spr_val = vcpu->arch.eptcfg;
 354                 break;
 355
 356         /* extra exceptions */
 357         case SPRN_IVOR32:
 358                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL];
 359                 break;
 360         case SPRN_IVOR33:
 361                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA];
 362                 break;
 363         case SPRN_IVOR34:
 364                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND];
 365                 break;
 366         case SPRN_IVOR35:
 367                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR];
 368                 break;
 369 #ifdef CONFIG_KVM_BOOKE_HV
 370         case SPRN_IVOR36:
 371                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL];
 372                 break;
 373         case SPRN_IVOR37:
 374                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL_CRIT];
 375                 break;
 376 #endif
 377         default:
 378                 emulated = kvmppc_booke_emulate_mfspr(vcpu, sprn, spr_val);
 379         }
 380
 381         return emulated;
 382 }
 383