arch/powerpc/kvm/book3s_hv_nestedv2.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2023 Jordan Niethe, IBM Corp. <[email protected]>
   4  *
   5  * Authors:
   6  *    Jordan Niethe <[email protected]>
   7  *
   8  * Description: KVM functions specific to running on Book 3S
   9  * processors as a NESTEDv2 guest.
  10  *
  11  */
  12
  13 #include "linux/blk-mq.h"
  14 #include "linux/console.h"
  15 #include "linux/gfp_types.h"
  16 #include "linux/signal.h"
  17 #include <linux/kernel.h>
  18 #include <linux/kvm_host.h>
  19 #include <linux/pgtable.h>
  20
  21 #include <asm/kvm_ppc.h>
  22 #include <asm/kvm_book3s.h>
  23 #include <asm/hvcall.h>
  24 #include <asm/pgalloc.h>
  25 #include <asm/reg.h>
  26 #include <asm/plpar_wrappers.h>
  27 #include <asm/guest-state-buffer.h>
  28 #include "trace_hv.h"
  29
  30 struct static_key_false __kvmhv_is_nestedv2 __read_mostly;
  31 EXPORT_SYMBOL_GPL(__kvmhv_is_nestedv2);
  32
  33
  34 static size_t
  35 gs_msg_ops_kvmhv_nestedv2_config_get_size(struct kvmppc_gs_msg *gsm)
  36 {
  37         u16 ids[] = {
  38                 KVMPPC_GSID_RUN_OUTPUT_MIN_SIZE,
  39                 KVMPPC_GSID_RUN_INPUT,
  40                 KVMPPC_GSID_RUN_OUTPUT,
  41
  42         };
  43         size_t size = 0;
  44
  45         for (int i = 0; i < ARRAY_SIZE(ids); i++)
  46                 size += kvmppc_gse_total_size(kvmppc_gsid_size(ids[i]));
  47         return size;
  48 }
  49
  50 static int
  51 gs_msg_ops_kvmhv_nestedv2_config_fill_info(struct kvmppc_gs_buff *gsb,
  52                                            struct kvmppc_gs_msg *gsm)
  53 {
  54         struct kvmhv_nestedv2_config *cfg;
  55         int rc;
  56
  57         cfg = gsm->data;
  58
  59         if (kvmppc_gsm_includes(gsm, KVMPPC_GSID_RUN_OUTPUT_MIN_SIZE)) {
  60                 rc = kvmppc_gse_put_u64(gsb, KVMPPC_GSID_RUN_OUTPUT_MIN_SIZE,
  61                                         cfg->vcpu_run_output_size);
  62                 if (rc < 0)
  63                         return rc;
  64         }
  65
  66         if (kvmppc_gsm_includes(gsm, KVMPPC_GSID_RUN_INPUT)) {
  67                 rc = kvmppc_gse_put_buff_info(gsb, KVMPPC_GSID_RUN_INPUT,
  68                                               cfg->vcpu_run_input_cfg);
  69                 if (rc < 0)
  70                         return rc;
  71         }
  72
  73         if (kvmppc_gsm_includes(gsm, KVMPPC_GSID_RUN_OUTPUT)) {
  74                 kvmppc_gse_put_buff_info(gsb, KVMPPC_GSID_RUN_OUTPUT,
  75                                          cfg->vcpu_run_output_cfg);
  76                 if (rc < 0)
  77                         return rc;
  78         }
  79
  80         return 0;
  81 }
  82
  83 static int
  84 gs_msg_ops_kvmhv_nestedv2_config_refresh_info(struct kvmppc_gs_msg *gsm,
  85                                               struct kvmppc_gs_buff *gsb)
  86 {
  87         struct kvmhv_nestedv2_config *cfg;
  88         struct kvmppc_gs_parser gsp = { 0 };
  89         struct kvmppc_gs_elem *gse;
  90         int rc;
  91
  92         cfg = gsm->data;
  93
  94         rc = kvmppc_gse_parse(&gsp, gsb);
  95         if (rc < 0)
  96                 return rc;
  97
  98         gse = kvmppc_gsp_lookup(&gsp, KVMPPC_GSID_RUN_OUTPUT_MIN_SIZE);
  99         if (gse)
 100                 cfg->vcpu_run_output_size = kvmppc_gse_get_u64(gse);
 101         return 0;
 102 }
 103
 104 static struct kvmppc_gs_msg_ops config_msg_ops = {
 105         .get_size = gs_msg_ops_kvmhv_nestedv2_config_get_size,
 106         .fill_info = gs_msg_ops_kvmhv_nestedv2_config_fill_info,
 107         .refresh_info = gs_msg_ops_kvmhv_nestedv2_config_refresh_info,
 108 };
 109
 110 static size_t gs_msg_ops_vcpu_get_size(struct kvmppc_gs_msg *gsm)
 111 {
 112         struct kvmppc_gs_bitmap gsbm = { 0 };
 113         size_t size = 0;
 114         u16 iden;
 115
 116         kvmppc_gsbm_fill(&gsbm);
 117         kvmppc_gsbm_for_each(&gsbm, iden)
 118         {
 119                 switch (iden) {
 120                 case KVMPPC_GSID_HOST_STATE_SIZE:
 121                 case KVMPPC_GSID_RUN_OUTPUT_MIN_SIZE:
 122                 case KVMPPC_GSID_PARTITION_TABLE:
 123                 case KVMPPC_GSID_PROCESS_TABLE:
 124                 case KVMPPC_GSID_RUN_INPUT:
 125                 case KVMPPC_GSID_RUN_OUTPUT:
 126                         break;
 127                 default:
 128                         size += kvmppc_gse_total_size(kvmppc_gsid_size(iden));
 129                 }
 130         }
 131         return size;
 132 }
 133
 134 static int gs_msg_ops_vcpu_fill_info(struct kvmppc_gs_buff *gsb,
 135                                      struct kvmppc_gs_msg *gsm)
 136 {
 137         struct kvm_vcpu *vcpu;
 138         vector128 v;
 139         int rc, i;
 140         u16 iden;
 141
 142         vcpu = gsm->data;
 143
 144         kvmppc_gsm_for_each(gsm, iden)
 145         {
 146                 rc = 0;
 147
 148                 if ((gsm->flags & KVMPPC_GS_FLAGS_WIDE) !=
 149                     (kvmppc_gsid_flags(iden) & KVMPPC_GS_FLAGS_WIDE))
 150                         continue;
 151
 152                 switch (iden) {
 153                 case KVMPPC_GSID_DSCR:
 154                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.dscr);
 155                         break;
 156                 case KVMPPC_GSID_MMCRA:
 157                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.mmcra);
 158                         break;
 159                 case KVMPPC_GSID_HFSCR:
 160                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.hfscr);
 161                         break;
 162                 case KVMPPC_GSID_PURR:
 163                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.purr);
 164                         break;
 165                 case KVMPPC_GSID_SPURR:
 166                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.spurr);
 167                         break;
 168                 case KVMPPC_GSID_AMR:
 169                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.amr);
 170                         break;
 171                 case KVMPPC_GSID_UAMOR:
 172                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.uamor);
 173                         break;
 174                 case KVMPPC_GSID_SIAR:
 175                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.siar);
 176                         break;
 177                 case KVMPPC_GSID_SDAR:
 178                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.sdar);
 179                         break;
 180                 case KVMPPC_GSID_IAMR:
 181                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.iamr);
 182                         break;
 183                 case KVMPPC_GSID_DAWR0:
 184                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.dawr0);
 185                         break;
 186                 case KVMPPC_GSID_DAWR1:
 187                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.dawr1);
 188                         break;
 189                 case KVMPPC_GSID_DAWRX0:
 190                         rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.dawrx0);
 191                         break;
 192                 case KVMPPC_GSID_DAWRX1:
 193                         rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.dawrx1);
 194                         break;
 195                 case KVMPPC_GSID_CIABR:
 196                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.ciabr);
 197                         break;
 198                 case KVMPPC_GSID_WORT:
 199                         rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.wort);
 200                         break;
 201                 case KVMPPC_GSID_PPR:
 202                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.ppr);
 203                         break;
 204                 case KVMPPC_GSID_PSPB:
 205                         rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.pspb);
 206                         break;
 207                 case KVMPPC_GSID_TAR:
 208                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.tar);
 209                         break;
 210                 case KVMPPC_GSID_FSCR:
 211                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.fscr);
 212                         break;
 213                 case KVMPPC_GSID_EBBHR:
 214                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.ebbhr);
 215                         break;
 216                 case KVMPPC_GSID_EBBRR:
 217                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.ebbrr);
 218                         break;
 219                 case KVMPPC_GSID_BESCR:
 220                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.bescr);
 221                         break;
 222                 case KVMPPC_GSID_IC:
 223                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.ic);
 224                         break;
 225                 case KVMPPC_GSID_CTRL:
 226                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.ctrl);
 227                         break;
 228                 case KVMPPC_GSID_PIDR:
 229                         rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.pid);
 230                         break;
 231                 case KVMPPC_GSID_AMOR: {
 232                         u64 amor = ~0;
 233
 234                         rc = kvmppc_gse_put_u64(gsb, iden, amor);
 235                         break;
 236                 }
 237                 case KVMPPC_GSID_VRSAVE:
 238                         rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.vrsave);
 239                         break;
 240                 case KVMPPC_GSID_MMCR(0)... KVMPPC_GSID_MMCR(3):
 241                         i = iden - KVMPPC_GSID_MMCR(0);
 242                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.mmcr[i]);
 243                         break;
 244                 case KVMPPC_GSID_SIER(0)... KVMPPC_GSID_SIER(2):
 245                         i = iden - KVMPPC_GSID_SIER(0);
 246                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.sier[i]);
 247                         break;
 248                 case KVMPPC_GSID_PMC(0)... KVMPPC_GSID_PMC(5):
 249                         i = iden - KVMPPC_GSID_PMC(0);
 250                         rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.pmc[i]);
 251                         break;
 252                 case KVMPPC_GSID_GPR(0)... KVMPPC_GSID_GPR(31):
 253                         i = iden - KVMPPC_GSID_GPR(0);
 254                         rc = kvmppc_gse_put_u64(gsb, iden,
 255                                                 vcpu->arch.regs.gpr[i]);
 256                         break;
 257                 case KVMPPC_GSID_CR:
 258                         rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.regs.ccr);
 259                         break;
 260                 case KVMPPC_GSID_XER:
 261                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.regs.xer);
 262                         break;
 263                 case KVMPPC_GSID_CTR:
 264                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.regs.ctr);
 265                         break;
 266                 case KVMPPC_GSID_LR:
 267                         rc = kvmppc_gse_put_u64(gsb, iden,
 268                                                 vcpu->arch.regs.link);
 269                         break;
 270                 case KVMPPC_GSID_NIA:
 271                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.regs.nip);
 272                         break;
 273                 case KVMPPC_GSID_SRR0:
 274                         rc = kvmppc_gse_put_u64(gsb, iden,
 275                                                 vcpu->arch.shregs.srr0);
 276                         break;
 277                 case KVMPPC_GSID_SRR1:
 278                         rc = kvmppc_gse_put_u64(gsb, iden,
 279                                                 vcpu->arch.shregs.srr1);
 280                         break;
 281                 case KVMPPC_GSID_SPRG0:
 282                         rc = kvmppc_gse_put_u64(gsb, iden,
 283                                                 vcpu->arch.shregs.sprg0);
 284                         break;
 285                 case KVMPPC_GSID_SPRG1:
 286                         rc = kvmppc_gse_put_u64(gsb, iden,
 287                                                 vcpu->arch.shregs.sprg1);
 288                         break;
 289                 case KVMPPC_GSID_SPRG2:
 290                         rc = kvmppc_gse_put_u64(gsb, iden,
 291                                                 vcpu->arch.shregs.sprg2);
 292                         break;
 293                 case KVMPPC_GSID_SPRG3:
 294                         rc = kvmppc_gse_put_u64(gsb, iden,
 295                                                 vcpu->arch.shregs.sprg3);
 296                         break;
 297                 case KVMPPC_GSID_DAR:
 298                         rc = kvmppc_gse_put_u64(gsb, iden,
 299                                                 vcpu->arch.shregs.dar);
 300                         break;
 301                 case KVMPPC_GSID_DSISR:
 302                         rc = kvmppc_gse_put_u32(gsb, iden,
 303                                                 vcpu->arch.shregs.dsisr);
 304                         break;
 305                 case KVMPPC_GSID_MSR:
 306                         rc = kvmppc_gse_put_u64(gsb, iden,
 307                                                 vcpu->arch.shregs.msr);
 308                         break;
 309                 case KVMPPC_GSID_VTB:
 310                         rc = kvmppc_gse_put_u64(gsb, iden,
 311                                                 vcpu->arch.vcore->vtb);
 312                         break;
 313                 case KVMPPC_GSID_LPCR:
 314                         rc = kvmppc_gse_put_u64(gsb, iden,
 315                                                 vcpu->arch.vcore->lpcr);
 316                         break;
 317                 case KVMPPC_GSID_TB_OFFSET:
 318                         rc = kvmppc_gse_put_u64(gsb, iden,
 319                                                 vcpu->arch.vcore->tb_offset);
 320                         break;
 321                 case KVMPPC_GSID_FPSCR:
 322                         rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.fp.fpscr);
 323                         break;
 324                 case KVMPPC_GSID_VSRS(0)... KVMPPC_GSID_VSRS(31):
 325                         i = iden - KVMPPC_GSID_VSRS(0);
 326                         memcpy(&v, &vcpu->arch.fp.fpr[i],
 327                                sizeof(vcpu->arch.fp.fpr[i]));
 328                         rc = kvmppc_gse_put_vector128(gsb, iden, &v);
 329                         break;
 330 #ifdef CONFIG_VSX
 331                 case KVMPPC_GSID_VSCR:
 332                         rc = kvmppc_gse_put_u32(gsb, iden,
 333                                                 vcpu->arch.vr.vscr.u[3]);
 334                         break;
 335                 case KVMPPC_GSID_VSRS(32)... KVMPPC_GSID_VSRS(63):
 336                         i = iden - KVMPPC_GSID_VSRS(32);
 337                         rc = kvmppc_gse_put_vector128(gsb, iden,
 338                                                       &vcpu->arch.vr.vr[i]);
 339                         break;
 340 #endif
 341                 case KVMPPC_GSID_DEC_EXPIRY_TB: {
 342                         u64 dw;
 343
 344                         dw = vcpu->arch.dec_expires -
 345                              vcpu->arch.vcore->tb_offset;
 346                         rc = kvmppc_gse_put_u64(gsb, iden, dw);
 347                         break;
 348                 }
 349                 case KVMPPC_GSID_LOGICAL_PVR:
 350                         rc = kvmppc_gse_put_u32(gsb, iden,
 351                                                 vcpu->arch.vcore->arch_compat);
 352                         break;
 353                 }
 354
 355                 if (rc < 0)
 356                         return rc;
 357         }
 358
 359         return 0;
 360 }
 361
 362 static int gs_msg_ops_vcpu_refresh_info(struct kvmppc_gs_msg *gsm,
 363                                         struct kvmppc_gs_buff *gsb)
 364 {
 365         struct kvmppc_gs_parser gsp = { 0 };
 366         struct kvmhv_nestedv2_io *io;
 367         struct kvmppc_gs_bitmap *valids;
 368         struct kvm_vcpu *vcpu;
 369         struct kvmppc_gs_elem *gse;
 370         vector128 v;
 371         int rc, i;
 372         u16 iden;
 373
 374         vcpu = gsm->data;
 375
 376         rc = kvmppc_gse_parse(&gsp, gsb);
 377         if (rc < 0)
 378                 return rc;
 379
 380         io = &vcpu->arch.nestedv2_io;
 381         valids = &io->valids;
 382
 383         kvmppc_gsp_for_each(&gsp, iden, gse)
 384         {
 385                 switch (iden) {
 386                 case KVMPPC_GSID_DSCR:
 387                         vcpu->arch.dscr = kvmppc_gse_get_u64(gse);
 388                         break;
 389                 case KVMPPC_GSID_MMCRA:
 390                         vcpu->arch.mmcra = kvmppc_gse_get_u64(gse);
 391                         break;
 392                 case KVMPPC_GSID_HFSCR:
 393                         vcpu->arch.hfscr = kvmppc_gse_get_u64(gse);
 394                         break;
 395                 case KVMPPC_GSID_PURR:
 396                         vcpu->arch.purr = kvmppc_gse_get_u64(gse);
 397                         break;
 398                 case KVMPPC_GSID_SPURR:
 399                         vcpu->arch.spurr = kvmppc_gse_get_u64(gse);
 400                         break;
 401                 case KVMPPC_GSID_AMR:
 402                         vcpu->arch.amr = kvmppc_gse_get_u64(gse);
 403                         break;
 404                 case KVMPPC_GSID_UAMOR:
 405                         vcpu->arch.uamor = kvmppc_gse_get_u64(gse);
 406                         break;
 407                 case KVMPPC_GSID_SIAR:
 408                         vcpu->arch.siar = kvmppc_gse_get_u64(gse);
 409                         break;
 410                 case KVMPPC_GSID_SDAR:
 411                         vcpu->arch.sdar = kvmppc_gse_get_u64(gse);
 412                         break;
 413                 case KVMPPC_GSID_IAMR:
 414                         vcpu->arch.iamr = kvmppc_gse_get_u64(gse);
 415                         break;
 416                 case KVMPPC_GSID_DAWR0:
 417                         vcpu->arch.dawr0 = kvmppc_gse_get_u64(gse);
 418                         break;
 419                 case KVMPPC_GSID_DAWR1:
 420                         vcpu->arch.dawr1 = kvmppc_gse_get_u64(gse);
 421                         break;
 422                 case KVMPPC_GSID_DAWRX0:
 423                         vcpu->arch.dawrx0 = kvmppc_gse_get_u32(gse);
 424                         break;
 425                 case KVMPPC_GSID_DAWRX1:
 426                         vcpu->arch.dawrx1 = kvmppc_gse_get_u32(gse);
 427                         break;
 428                 case KVMPPC_GSID_CIABR:
 429                         vcpu->arch.ciabr = kvmppc_gse_get_u64(gse);
 430                         break;
 431                 case KVMPPC_GSID_WORT:
 432                         vcpu->arch.wort = kvmppc_gse_get_u32(gse);
 433                         break;
 434                 case KVMPPC_GSID_PPR:
 435                         vcpu->arch.ppr = kvmppc_gse_get_u64(gse);
 436                         break;
 437                 case KVMPPC_GSID_PSPB:
 438                         vcpu->arch.pspb = kvmppc_gse_get_u32(gse);
 439                         break;
 440                 case KVMPPC_GSID_TAR:
 441                         vcpu->arch.tar = kvmppc_gse_get_u64(gse);
 442                         break;
 443                 case KVMPPC_GSID_FSCR:
 444                         vcpu->arch.fscr = kvmppc_gse_get_u64(gse);
 445                         break;
 446                 case KVMPPC_GSID_EBBHR:
 447                         vcpu->arch.ebbhr = kvmppc_gse_get_u64(gse);
 448                         break;
 449                 case KVMPPC_GSID_EBBRR:
 450                         vcpu->arch.ebbrr = kvmppc_gse_get_u64(gse);
 451                         break;
 452                 case KVMPPC_GSID_BESCR:
 453                         vcpu->arch.bescr = kvmppc_gse_get_u64(gse);
 454                         break;
 455                 case KVMPPC_GSID_IC:
 456                         vcpu->arch.ic = kvmppc_gse_get_u64(gse);
 457                         break;
 458                 case KVMPPC_GSID_CTRL:
 459                         vcpu->arch.ctrl = kvmppc_gse_get_u64(gse);
 460                         break;
 461                 case KVMPPC_GSID_PIDR:
 462                         vcpu->arch.pid = kvmppc_gse_get_u32(gse);
 463                         break;
 464                 case KVMPPC_GSID_AMOR:
 465                         break;
 466                 case KVMPPC_GSID_VRSAVE:
 467                         vcpu->arch.vrsave = kvmppc_gse_get_u32(gse);
 468                         break;
 469                 case KVMPPC_GSID_MMCR(0)... KVMPPC_GSID_MMCR(3):
 470                         i = iden - KVMPPC_GSID_MMCR(0);
 471                         vcpu->arch.mmcr[i] = kvmppc_gse_get_u64(gse);
 472                         break;
 473                 case KVMPPC_GSID_SIER(0)... KVMPPC_GSID_SIER(2):
 474                         i = iden - KVMPPC_GSID_SIER(0);
 475                         vcpu->arch.sier[i] = kvmppc_gse_get_u64(gse);
 476                         break;
 477                 case KVMPPC_GSID_PMC(0)... KVMPPC_GSID_PMC(5):
 478                         i = iden - KVMPPC_GSID_PMC(0);
 479                         vcpu->arch.pmc[i] = kvmppc_gse_get_u32(gse);
 480                         break;
 481                 case KVMPPC_GSID_GPR(0)... KVMPPC_GSID_GPR(31):
 482                         i = iden - KVMPPC_GSID_GPR(0);
 483                         vcpu->arch.regs.gpr[i] = kvmppc_gse_get_u64(gse);
 484                         break;
 485                 case KVMPPC_GSID_CR:
 486                         vcpu->arch.regs.ccr = kvmppc_gse_get_u32(gse);
 487                         break;
 488                 case KVMPPC_GSID_XER:
 489                         vcpu->arch.regs.xer = kvmppc_gse_get_u64(gse);
 490                         break;
 491                 case KVMPPC_GSID_CTR:
 492                         vcpu->arch.regs.ctr = kvmppc_gse_get_u64(gse);
 493                         break;
 494                 case KVMPPC_GSID_LR:
 495                         vcpu->arch.regs.link = kvmppc_gse_get_u64(gse);
 496                         break;
 497                 case KVMPPC_GSID_NIA:
 498                         vcpu->arch.regs.nip = kvmppc_gse_get_u64(gse);
 499                         break;
 500                 case KVMPPC_GSID_SRR0:
 501                         vcpu->arch.shregs.srr0 = kvmppc_gse_get_u64(gse);
 502                         break;
 503                 case KVMPPC_GSID_SRR1:
 504                         vcpu->arch.shregs.srr1 = kvmppc_gse_get_u64(gse);
 505                         break;
 506                 case KVMPPC_GSID_SPRG0:
 507                         vcpu->arch.shregs.sprg0 = kvmppc_gse_get_u64(gse);
 508                         break;
 509                 case KVMPPC_GSID_SPRG1:
 510                         vcpu->arch.shregs.sprg1 = kvmppc_gse_get_u64(gse);
 511                         break;
 512                 case KVMPPC_GSID_SPRG2:
 513                         vcpu->arch.shregs.sprg2 = kvmppc_gse_get_u64(gse);
 514                         break;
 515                 case KVMPPC_GSID_SPRG3:
 516                         vcpu->arch.shregs.sprg3 = kvmppc_gse_get_u64(gse);
 517                         break;
 518                 case KVMPPC_GSID_DAR:
 519                         vcpu->arch.shregs.dar = kvmppc_gse_get_u64(gse);
 520                         break;
 521                 case KVMPPC_GSID_DSISR:
 522                         vcpu->arch.shregs.dsisr = kvmppc_gse_get_u32(gse);
 523                         break;
 524                 case KVMPPC_GSID_MSR:
 525                         vcpu->arch.shregs.msr = kvmppc_gse_get_u64(gse);
 526                         break;
 527                 case KVMPPC_GSID_VTB:
 528                         vcpu->arch.vcore->vtb = kvmppc_gse_get_u64(gse);
 529                         break;
 530                 case KVMPPC_GSID_LPCR:
 531                         vcpu->arch.vcore->lpcr = kvmppc_gse_get_u64(gse);
 532                         break;
 533                 case KVMPPC_GSID_TB_OFFSET:
 534                         vcpu->arch.vcore->tb_offset = kvmppc_gse_get_u64(gse);
 535                         break;
 536                 case KVMPPC_GSID_FPSCR:
 537                         vcpu->arch.fp.fpscr = kvmppc_gse_get_u64(gse);
 538                         break;
 539                 case KVMPPC_GSID_VSRS(0)... KVMPPC_GSID_VSRS(31):
 540                         kvmppc_gse_get_vector128(gse, &v);
 541                         i = iden - KVMPPC_GSID_VSRS(0);
 542                         memcpy(&vcpu->arch.fp.fpr[i], &v,
 543                                sizeof(vcpu->arch.fp.fpr[i]));
 544                         break;
 545 #ifdef CONFIG_VSX
 546                 case KVMPPC_GSID_VSCR:
 547                         vcpu->arch.vr.vscr.u[3] = kvmppc_gse_get_u32(gse);
 548                         break;
 549                 case KVMPPC_GSID_VSRS(32)... KVMPPC_GSID_VSRS(63):
 550                         i = iden - KVMPPC_GSID_VSRS(32);
 551                         kvmppc_gse_get_vector128(gse, &vcpu->arch.vr.vr[i]);
 552                         break;
 553 #endif
 554                 case KVMPPC_GSID_HDAR:
 555                         vcpu->arch.fault_dar = kvmppc_gse_get_u64(gse);
 556                         break;
 557                 case KVMPPC_GSID_HDSISR:
 558                         vcpu->arch.fault_dsisr = kvmppc_gse_get_u32(gse);
 559                         break;
 560                 case KVMPPC_GSID_ASDR:
 561                         vcpu->arch.fault_gpa = kvmppc_gse_get_u64(gse);
 562                         break;
 563                 case KVMPPC_GSID_HEIR:
 564                         vcpu->arch.emul_inst = kvmppc_gse_get_u64(gse);
 565                         break;
 566                 case KVMPPC_GSID_DEC_EXPIRY_TB: {
 567                         u64 dw;
 568
 569                         dw = kvmppc_gse_get_u64(gse);
 570                         vcpu->arch.dec_expires =
 571                                 dw + vcpu->arch.vcore->tb_offset;
 572                         break;
 573                 }
 574                 case KVMPPC_GSID_LOGICAL_PVR:
 575                         vcpu->arch.vcore->arch_compat = kvmppc_gse_get_u32(gse);
 576                         break;
 577                 default:
 578                         continue;
 579                 }
 580                 kvmppc_gsbm_set(valids, iden);
 581         }
 582
 583         return 0;
 584 }
 585
 586 static struct kvmppc_gs_msg_ops vcpu_message_ops = {
 587         .get_size = gs_msg_ops_vcpu_get_size,
 588         .fill_info = gs_msg_ops_vcpu_fill_info,
 589         .refresh_info = gs_msg_ops_vcpu_refresh_info,
 590 };
 591
 592 static int kvmhv_nestedv2_host_create(struct kvm_vcpu *vcpu,
 593                                       struct kvmhv_nestedv2_io *io)
 594 {
 595         struct kvmhv_nestedv2_config *cfg;
 596         struct kvmppc_gs_buff *gsb, *vcpu_run_output, *vcpu_run_input;
 597         unsigned long guest_id, vcpu_id;
 598         struct kvmppc_gs_msg *gsm, *vcpu_message, *vcore_message;
 599         int rc;
 600
 601         cfg = &io->cfg;
 602         guest_id = vcpu->kvm->arch.lpid;
 603         vcpu_id = vcpu->vcpu_id;
 604
 605         gsm = kvmppc_gsm_new(&config_msg_ops, cfg, KVMPPC_GS_FLAGS_WIDE,
 606                              GFP_KERNEL);
 607         if (!gsm) {
 608                 rc = -ENOMEM;
 609                 goto err;
 610         }
 611
 612         gsb = kvmppc_gsb_new(kvmppc_gsm_size(gsm), guest_id, vcpu_id,
 613                              GFP_KERNEL);
 614         if (!gsb) {
 615                 rc = -ENOMEM;
 616                 goto free_gsm;
 617         }
 618
 619         rc = kvmppc_gsb_receive_datum(gsb, gsm,
 620                                       KVMPPC_GSID_RUN_OUTPUT_MIN_SIZE);
 621         if (rc < 0) {
 622                 pr_err("KVM-NESTEDv2: couldn't get vcpu run output buffer minimum size\n");
 623                 goto free_gsb;
 624         }
 625
 626         vcpu_run_output = kvmppc_gsb_new(cfg->vcpu_run_output_size, guest_id,
 627                                          vcpu_id, GFP_KERNEL);
 628         if (!vcpu_run_output) {
 629                 rc = -ENOMEM;
 630                 goto free_gsb;
 631         }
 632
 633         cfg->vcpu_run_output_cfg.address = kvmppc_gsb_paddress(vcpu_run_output);
 634         cfg->vcpu_run_output_cfg.size = kvmppc_gsb_capacity(vcpu_run_output);
 635         io->vcpu_run_output = vcpu_run_output;
 636
 637         gsm->flags = 0;
 638         rc = kvmppc_gsb_send_datum(gsb, gsm, KVMPPC_GSID_RUN_OUTPUT);
 639         if (rc < 0) {
 640                 pr_err("KVM-NESTEDv2: couldn't set vcpu run output buffer\n");
 641                 goto free_gs_out;
 642         }
 643
 644         vcpu_message = kvmppc_gsm_new(&vcpu_message_ops, vcpu, 0, GFP_KERNEL);
 645         if (!vcpu_message) {
 646                 rc = -ENOMEM;
 647                 goto free_gs_out;
 648         }
 649         kvmppc_gsm_include_all(vcpu_message);
 650
 651         io->vcpu_message = vcpu_message;
 652
 653         vcpu_run_input = kvmppc_gsb_new(kvmppc_gsm_size(vcpu_message), guest_id,
 654                                         vcpu_id, GFP_KERNEL);
 655         if (!vcpu_run_input) {
 656                 rc = -ENOMEM;
 657                 goto free_vcpu_message;
 658         }
 659
 660         io->vcpu_run_input = vcpu_run_input;
 661         cfg->vcpu_run_input_cfg.address = kvmppc_gsb_paddress(vcpu_run_input);
 662         cfg->vcpu_run_input_cfg.size = kvmppc_gsb_capacity(vcpu_run_input);
 663         rc = kvmppc_gsb_send_datum(gsb, gsm, KVMPPC_GSID_RUN_INPUT);
 664         if (rc < 0) {
 665                 pr_err("KVM-NESTEDv2: couldn't set vcpu run input buffer\n");
 666                 goto free_vcpu_run_input;
 667         }
 668
 669         vcore_message = kvmppc_gsm_new(&vcpu_message_ops, vcpu,
 670                                        KVMPPC_GS_FLAGS_WIDE, GFP_KERNEL);
 671         if (!vcore_message) {
 672                 rc = -ENOMEM;
 673                 goto free_vcpu_run_input;
 674         }
 675
 676         kvmppc_gsm_include_all(vcore_message);
 677         kvmppc_gsbm_clear(&vcore_message->bitmap, KVMPPC_GSID_LOGICAL_PVR);
 678         io->vcore_message = vcore_message;
 679
 680         kvmppc_gsbm_fill(&io->valids);
 681         kvmppc_gsm_free(gsm);
 682         kvmppc_gsb_free(gsb);
 683         return 0;
 684
 685 free_vcpu_run_input:
 686         kvmppc_gsb_free(vcpu_run_input);
 687 free_vcpu_message:
 688         kvmppc_gsm_free(vcpu_message);
 689 free_gs_out:
 690         kvmppc_gsb_free(vcpu_run_output);
 691 free_gsb:
 692         kvmppc_gsb_free(gsb);
 693 free_gsm:
 694         kvmppc_gsm_free(gsm);
 695 err:
 696         return rc;
 697 }
 698
 699 /**
 700  * __kvmhv_nestedv2_mark_dirty() - mark a Guest State ID to be sent to the host
 701  * @vcpu: vcpu
 702  * @iden: guest state ID
 703  *
 704  * Mark a guest state ID as having been changed by the L1 host and thus
 705  * the new value must be sent to the L0 hypervisor. See kvmhv_nestedv2_flush_vcpu()
 706  */
 707 int __kvmhv_nestedv2_mark_dirty(struct kvm_vcpu *vcpu, u16 iden)
 708 {
 709         struct kvmhv_nestedv2_io *io;
 710         struct kvmppc_gs_bitmap *valids;
 711         struct kvmppc_gs_msg *gsm;
 712
 713         if (!iden)
 714                 return 0;
 715
 716         io = &vcpu->arch.nestedv2_io;
 717         valids = &io->valids;
 718         gsm = io->vcpu_message;
 719         kvmppc_gsm_include(gsm, iden);
 720         gsm = io->vcore_message;
 721         kvmppc_gsm_include(gsm, iden);
 722         kvmppc_gsbm_set(valids, iden);
 723         return 0;
 724 }
 725 EXPORT_SYMBOL_GPL(__kvmhv_nestedv2_mark_dirty);
 726
 727 /**
 728  * __kvmhv_nestedv2_cached_reload() - reload a Guest State ID from the host
 729  * @vcpu: vcpu
 730  * @iden: guest state ID
 731  *
 732  * Reload the value for the guest state ID from the L0 host into the L1 host.
 733  * This is cached so that going out to the L0 host only happens if necessary.
 734  */
 735 int __kvmhv_nestedv2_cached_reload(struct kvm_vcpu *vcpu, u16 iden)
 736 {
 737         struct kvmhv_nestedv2_io *io;
 738         struct kvmppc_gs_bitmap *valids;
 739         struct kvmppc_gs_buff *gsb;
 740         struct kvmppc_gs_msg gsm;
 741         int rc;
 742
 743         if (!iden)
 744                 return 0;
 745
 746         io = &vcpu->arch.nestedv2_io;
 747         valids = &io->valids;
 748         if (kvmppc_gsbm_test(valids, iden))
 749                 return 0;
 750
 751         gsb = io->vcpu_run_input;
 752         kvmppc_gsm_init(&gsm, &vcpu_message_ops, vcpu, kvmppc_gsid_flags(iden));
 753         rc = kvmppc_gsb_receive_datum(gsb, &gsm, iden);
 754         if (rc < 0) {
 755                 pr_err("KVM-NESTEDv2: couldn't get GSID: 0x%x\n", iden);
 756                 return rc;
 757         }
 758         return 0;
 759 }
 760 EXPORT_SYMBOL_GPL(__kvmhv_nestedv2_cached_reload);
 761
 762 /**
 763  * kvmhv_nestedv2_flush_vcpu() - send modified Guest State IDs to the host
 764  * @vcpu: vcpu
 765  * @time_limit: hdec expiry tb
 766  *
 767  * Send the values marked by __kvmhv_nestedv2_mark_dirty() to the L0 host.
 768  * Thread wide values are copied to the H_GUEST_RUN_VCPU input buffer. Guest
 769  * wide values need to be sent with H_GUEST_SET first.
 770  *
 771  * The hdec tb offset is always sent to L0 host.
 772  */
 773 int kvmhv_nestedv2_flush_vcpu(struct kvm_vcpu *vcpu, u64 time_limit)
 774 {
 775         struct kvmhv_nestedv2_io *io;
 776         struct kvmppc_gs_buff *gsb;
 777         struct kvmppc_gs_msg *gsm;
 778         int rc;
 779
 780         io = &vcpu->arch.nestedv2_io;
 781         gsb = io->vcpu_run_input;
 782         gsm = io->vcore_message;
 783         rc = kvmppc_gsb_send_data(gsb, gsm);
 784         if (rc < 0) {
 785                 pr_err("KVM-NESTEDv2: couldn't set guest wide elements\n");
 786                 return rc;
 787         }
 788
 789         gsm = io->vcpu_message;
 790         kvmppc_gsb_reset(gsb);
 791         rc = kvmppc_gsm_fill_info(gsm, gsb);
 792         if (rc < 0) {
 793                 pr_err("KVM-NESTEDv2: couldn't fill vcpu run input buffer\n");
 794                 return rc;
 795         }
 796
 797         rc = kvmppc_gse_put_u64(gsb, KVMPPC_GSID_HDEC_EXPIRY_TB, time_limit);
 798         if (rc < 0)
 799                 return rc;
 800         return 0;
 801 }
 802 EXPORT_SYMBOL_GPL(kvmhv_nestedv2_flush_vcpu);
 803
 804 /**
 805  * kvmhv_nestedv2_set_ptbl_entry() - send partition and process table state to
 806  * L0 host
 807  * @lpid: guest id
 808  * @dw0: partition table double word
 809  * @dw1: process table double word
 810  */
 811 int kvmhv_nestedv2_set_ptbl_entry(unsigned long lpid, u64 dw0, u64 dw1)
 812 {
 813         struct kvmppc_gs_part_table patbl;
 814         struct kvmppc_gs_proc_table prtbl;
 815         struct kvmppc_gs_buff *gsb;
 816         size_t size;
 817         int rc;
 818
 819         size = kvmppc_gse_total_size(
 820                        kvmppc_gsid_size(KVMPPC_GSID_PARTITION_TABLE)) +
 821                kvmppc_gse_total_size(
 822                        kvmppc_gsid_size(KVMPPC_GSID_PROCESS_TABLE)) +
 823                sizeof(struct kvmppc_gs_header);
 824         gsb = kvmppc_gsb_new(size, lpid, 0, GFP_KERNEL);
 825         if (!gsb)
 826                 return -ENOMEM;
 827
 828         patbl.address = dw0 & RPDB_MASK;
 829         patbl.ea_bits = ((((dw0 & RTS1_MASK) >> (RTS1_SHIFT - 3)) |
 830                           ((dw0 & RTS2_MASK) >> RTS2_SHIFT)) +
 831                          31);
 832         patbl.gpd_size = 1ul << ((dw0 & RPDS_MASK) + 3);
 833         rc = kvmppc_gse_put_part_table(gsb, KVMPPC_GSID_PARTITION_TABLE, patbl);
 834         if (rc < 0)
 835                 goto free_gsb;
 836
 837         prtbl.address = dw1 & PRTB_MASK;
 838         prtbl.gpd_size = 1ul << ((dw1 & PRTS_MASK) + 12);
 839         rc = kvmppc_gse_put_proc_table(gsb, KVMPPC_GSID_PROCESS_TABLE, prtbl);
 840         if (rc < 0)
 841                 goto free_gsb;
 842
 843         rc = kvmppc_gsb_send(gsb, KVMPPC_GS_FLAGS_WIDE);
 844         if (rc < 0) {
 845                 pr_err("KVM-NESTEDv2: couldn't set the PATE\n");
 846                 goto free_gsb;
 847         }
 848
 849         kvmppc_gsb_free(gsb);
 850         return 0;
 851
 852 free_gsb:
 853         kvmppc_gsb_free(gsb);
 854         return rc;
 855 }
 856 EXPORT_SYMBOL_GPL(kvmhv_nestedv2_set_ptbl_entry);
 857
 858 /**
 859  * kvmhv_nestedv2_parse_output() - receive values from H_GUEST_RUN_VCPU output
 860  * @vcpu: vcpu
 861  *
 862  * Parse the output buffer from H_GUEST_RUN_VCPU to update vcpu.
 863  */
 864 int kvmhv_nestedv2_parse_output(struct kvm_vcpu *vcpu)
 865 {
 866         struct kvmhv_nestedv2_io *io;
 867         struct kvmppc_gs_buff *gsb;
 868         struct kvmppc_gs_msg gsm;
 869
 870         io = &vcpu->arch.nestedv2_io;
 871         gsb = io->vcpu_run_output;
 872
 873         vcpu->arch.fault_dar = 0;
 874         vcpu->arch.fault_dsisr = 0;
 875         vcpu->arch.fault_gpa = 0;
 876         vcpu->arch.emul_inst = KVM_INST_FETCH_FAILED;
 877
 878         kvmppc_gsm_init(&gsm, &vcpu_message_ops, vcpu, 0);
 879         return kvmppc_gsm_refresh_info(&gsm, gsb);
 880 }
 881 EXPORT_SYMBOL_GPL(kvmhv_nestedv2_parse_output);
 882
 883 static void kvmhv_nestedv2_host_free(struct kvm_vcpu *vcpu,
 884                                      struct kvmhv_nestedv2_io *io)
 885 {
 886         kvmppc_gsm_free(io->vcpu_message);
 887         kvmppc_gsm_free(io->vcore_message);
 888         kvmppc_gsb_free(io->vcpu_run_input);
 889         kvmppc_gsb_free(io->vcpu_run_output);
 890 }
 891
 892 int __kvmhv_nestedv2_reload_ptregs(struct kvm_vcpu *vcpu, struct pt_regs *regs)
 893 {
 894         struct kvmhv_nestedv2_io *io;
 895         struct kvmppc_gs_bitmap *valids;
 896         struct kvmppc_gs_buff *gsb;
 897         struct kvmppc_gs_msg gsm;
 898         int rc = 0;
 899
 900
 901         io = &vcpu->arch.nestedv2_io;
 902         valids = &io->valids;
 903
 904         gsb = io->vcpu_run_input;
 905         kvmppc_gsm_init(&gsm, &vcpu_message_ops, vcpu, 0);
 906
 907         for (int i = 0; i < 32; i++) {
 908                 if (!kvmppc_gsbm_test(valids, KVMPPC_GSID_GPR(i)))
 909                         kvmppc_gsm_include(&gsm, KVMPPC_GSID_GPR(i));
 910         }
 911
 912         if (!kvmppc_gsbm_test(valids, KVMPPC_GSID_CR))
 913                 kvmppc_gsm_include(&gsm, KVMPPC_GSID_CR);
 914
 915         if (!kvmppc_gsbm_test(valids, KVMPPC_GSID_XER))
 916                 kvmppc_gsm_include(&gsm, KVMPPC_GSID_XER);
 917
 918         if (!kvmppc_gsbm_test(valids, KVMPPC_GSID_CTR))
 919                 kvmppc_gsm_include(&gsm, KVMPPC_GSID_CTR);
 920
 921         if (!kvmppc_gsbm_test(valids, KVMPPC_GSID_LR))
 922                 kvmppc_gsm_include(&gsm, KVMPPC_GSID_LR);
 923
 924         if (!kvmppc_gsbm_test(valids, KVMPPC_GSID_NIA))
 925                 kvmppc_gsm_include(&gsm, KVMPPC_GSID_NIA);
 926
 927         rc = kvmppc_gsb_receive_data(gsb, &gsm);
 928         if (rc < 0)
 929                 pr_err("KVM-NESTEDv2: couldn't reload ptregs\n");
 930
 931         return rc;
 932 }
 933 EXPORT_SYMBOL_GPL(__kvmhv_nestedv2_reload_ptregs);
 934
 935 int __kvmhv_nestedv2_mark_dirty_ptregs(struct kvm_vcpu *vcpu,
 936                                        struct pt_regs *regs)
 937 {
 938         for (int i = 0; i < 32; i++)
 939                 kvmhv_nestedv2_mark_dirty(vcpu, KVMPPC_GSID_GPR(i));
 940
 941         kvmhv_nestedv2_mark_dirty(vcpu, KVMPPC_GSID_CR);
 942         kvmhv_nestedv2_mark_dirty(vcpu, KVMPPC_GSID_XER);
 943         kvmhv_nestedv2_mark_dirty(vcpu, KVMPPC_GSID_CTR);
 944         kvmhv_nestedv2_mark_dirty(vcpu, KVMPPC_GSID_LR);
 945         kvmhv_nestedv2_mark_dirty(vcpu, KVMPPC_GSID_NIA);
 946
 947         return 0;
 948 }
 949 EXPORT_SYMBOL_GPL(__kvmhv_nestedv2_mark_dirty_ptregs);
 950
 951 /**
 952  * kvmhv_nestedv2_vcpu_create() - create nested vcpu for the NESTEDv2 API
 953  * @vcpu: vcpu
 954  * @io: NESTEDv2 nested io state
 955  *
 956  * Parse the output buffer from H_GUEST_RUN_VCPU to update vcpu.
 957  */
 958 int kvmhv_nestedv2_vcpu_create(struct kvm_vcpu *vcpu,
 959                                struct kvmhv_nestedv2_io *io)
 960 {
 961         long rc;
 962
 963         rc = plpar_guest_create_vcpu(0, vcpu->kvm->arch.lpid, vcpu->vcpu_id);
 964
 965         if (rc != H_SUCCESS) {
 966                 pr_err("KVM: Create Guest vcpu hcall failed, rc=%ld\n", rc);
 967                 switch (rc) {
 968                 case H_NOT_ENOUGH_RESOURCES:
 969                 case H_ABORTED:
 970                         return -ENOMEM;
 971                 case H_AUTHORITY:
 972                         return -EPERM;
 973                 default:
 974                         return -EINVAL;
 975                 }
 976         }
 977
 978         rc = kvmhv_nestedv2_host_create(vcpu, io);
 979
 980         return rc;
 981 }
 982 EXPORT_SYMBOL_GPL(kvmhv_nestedv2_vcpu_create);
 983
 984 /**
 985  * kvmhv_nestedv2_vcpu_free() - free the NESTEDv2 state
 986  * @vcpu: vcpu
 987  * @io: NESTEDv2 nested io state
 988  */
 989 void kvmhv_nestedv2_vcpu_free(struct kvm_vcpu *vcpu,
 990                               struct kvmhv_nestedv2_io *io)
 991 {
 992         kvmhv_nestedv2_host_free(vcpu, io);
 993 }
 994 EXPORT_SYMBOL_GPL(kvmhv_nestedv2_vcpu_free);