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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 | /* * Copyright (C) 2011. Freescale Inc. All rights reserved. * * Authors: * Alexander Graf <agraf@suse.de> * Paul Mackerras <paulus@samba.org> * * Description: * * Hypercall handling for running PAPR guests in PR KVM on Book 3S * processors. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License, version 2, as * published by the Free Software Foundation. */ #include <linux/anon_inodes.h> #include <linux/uaccess.h> #include <asm/kvm_ppc.h> #include <asm/kvm_book3s.h> #define HPTE_SIZE 16 /* bytes per HPT entry */ static unsigned long get_pteg_addr(struct kvm_vcpu *vcpu, long pte_index) { struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu); unsigned long pteg_addr; pte_index <<= 4; pte_index &= ((1 << ((vcpu_book3s->sdr1 & 0x1f) + 11)) - 1) << 7 | 0x70; pteg_addr = vcpu_book3s->sdr1 & 0xfffffffffffc0000ULL; pteg_addr |= pte_index; return pteg_addr; } static int kvmppc_h_pr_enter(struct kvm_vcpu *vcpu) { long flags = kvmppc_get_gpr(vcpu, 4); long pte_index = kvmppc_get_gpr(vcpu, 5); __be64 pteg[2 * 8]; __be64 *hpte; unsigned long pteg_addr, i; long int ret; i = pte_index & 7; pte_index &= ~7UL; pteg_addr = get_pteg_addr(vcpu, pte_index); mutex_lock(&vcpu->kvm->arch.hpt_mutex); ret = H_FUNCTION; if (copy_from_user(pteg, (void __user *)pteg_addr, sizeof(pteg))) goto done; hpte = pteg; ret = H_PTEG_FULL; if (likely((flags & H_EXACT) == 0)) { for (i = 0; ; ++i) { if (i == 8) goto done; if ((be64_to_cpu(*hpte) & HPTE_V_VALID) == 0) break; hpte += 2; } } else { hpte += i * 2; if (*hpte & HPTE_V_VALID) goto done; } hpte[0] = cpu_to_be64(kvmppc_get_gpr(vcpu, 6)); hpte[1] = cpu_to_be64(kvmppc_get_gpr(vcpu, 7)); pteg_addr += i * HPTE_SIZE; ret = H_FUNCTION; if (copy_to_user((void __user *)pteg_addr, hpte, HPTE_SIZE)) goto done; kvmppc_set_gpr(vcpu, 4, pte_index | i); ret = H_SUCCESS; done: mutex_unlock(&vcpu->kvm->arch.hpt_mutex); kvmppc_set_gpr(vcpu, 3, ret); return EMULATE_DONE; } static int kvmppc_h_pr_remove(struct kvm_vcpu *vcpu) { unsigned long flags= kvmppc_get_gpr(vcpu, 4); unsigned long pte_index = kvmppc_get_gpr(vcpu, 5); unsigned long avpn = kvmppc_get_gpr(vcpu, 6); unsigned long v = 0, pteg, rb; unsigned long pte[2]; long int ret; pteg = get_pteg_addr(vcpu, pte_index); mutex_lock(&vcpu->kvm->arch.hpt_mutex); ret = H_FUNCTION; if (copy_from_user(pte, (void __user *)pteg, sizeof(pte))) goto done; pte[0] = be64_to_cpu((__force __be64)pte[0]); pte[1] = be64_to_cpu((__force __be64)pte[1]); ret = H_NOT_FOUND; if ((pte[0] & HPTE_V_VALID) == 0 || ((flags & H_AVPN) && (pte[0] & ~0x7fUL) != avpn) || ((flags & H_ANDCOND) && (pte[0] & avpn) != 0)) goto done; ret = H_FUNCTION; if (copy_to_user((void __user *)pteg, &v, sizeof(v))) goto done; rb = compute_tlbie_rb(pte[0], pte[1], pte_index); vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false); ret = H_SUCCESS; kvmppc_set_gpr(vcpu, 4, pte[0]); kvmppc_set_gpr(vcpu, 5, pte[1]); done: mutex_unlock(&vcpu->kvm->arch.hpt_mutex); kvmppc_set_gpr(vcpu, 3, ret); return EMULATE_DONE; } /* Request defs for kvmppc_h_pr_bulk_remove() */ #define H_BULK_REMOVE_TYPE 0xc000000000000000ULL #define H_BULK_REMOVE_REQUEST 0x4000000000000000ULL #define H_BULK_REMOVE_RESPONSE 0x8000000000000000ULL #define H_BULK_REMOVE_END 0xc000000000000000ULL #define H_BULK_REMOVE_CODE 0x3000000000000000ULL #define H_BULK_REMOVE_SUCCESS 0x0000000000000000ULL #define H_BULK_REMOVE_NOT_FOUND 0x1000000000000000ULL #define H_BULK_REMOVE_PARM 0x2000000000000000ULL #define H_BULK_REMOVE_HW 0x3000000000000000ULL #define H_BULK_REMOVE_RC 0x0c00000000000000ULL #define H_BULK_REMOVE_FLAGS 0x0300000000000000ULL #define H_BULK_REMOVE_ABSOLUTE 0x0000000000000000ULL #define H_BULK_REMOVE_ANDCOND 0x0100000000000000ULL #define H_BULK_REMOVE_AVPN 0x0200000000000000ULL #define H_BULK_REMOVE_PTEX 0x00ffffffffffffffULL #define H_BULK_REMOVE_MAX_BATCH 4 static int kvmppc_h_pr_bulk_remove(struct kvm_vcpu *vcpu) { int i; int paramnr = 4; int ret = H_SUCCESS; mutex_lock(&vcpu->kvm->arch.hpt_mutex); for (i = 0; i < H_BULK_REMOVE_MAX_BATCH; i++) { unsigned long tsh = kvmppc_get_gpr(vcpu, paramnr+(2*i)); unsigned long tsl = kvmppc_get_gpr(vcpu, paramnr+(2*i)+1); unsigned long pteg, rb, flags; unsigned long pte[2]; unsigned long v = 0; if ((tsh & H_BULK_REMOVE_TYPE) == H_BULK_REMOVE_END) { break; /* Exit success */ } else if ((tsh & H_BULK_REMOVE_TYPE) != H_BULK_REMOVE_REQUEST) { ret = H_PARAMETER; break; /* Exit fail */ } tsh &= H_BULK_REMOVE_PTEX | H_BULK_REMOVE_FLAGS; tsh |= H_BULK_REMOVE_RESPONSE; if ((tsh & H_BULK_REMOVE_ANDCOND) && (tsh & H_BULK_REMOVE_AVPN)) { tsh |= H_BULK_REMOVE_PARM; kvmppc_set_gpr(vcpu, paramnr+(2*i), tsh); ret = H_PARAMETER; break; /* Exit fail */ } pteg = get_pteg_addr(vcpu, tsh & H_BULK_REMOVE_PTEX); if (copy_from_user(pte, (void __user *)pteg, sizeof(pte))) { ret = H_FUNCTION; break; } pte[0] = be64_to_cpu((__force __be64)pte[0]); pte[1] = be64_to_cpu((__force __be64)pte[1]); /* tsl = AVPN */ flags = (tsh & H_BULK_REMOVE_FLAGS) >> 26; if ((pte[0] & HPTE_V_VALID) == 0 || ((flags & H_AVPN) && (pte[0] & ~0x7fUL) != tsl) || ((flags & H_ANDCOND) && (pte[0] & tsl) != 0)) { tsh |= H_BULK_REMOVE_NOT_FOUND; } else { /* Splat the pteg in (userland) hpt */ if (copy_to_user((void __user *)pteg, &v, sizeof(v))) { ret = H_FUNCTION; break; } rb = compute_tlbie_rb(pte[0], pte[1], tsh & H_BULK_REMOVE_PTEX); vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false); tsh |= H_BULK_REMOVE_SUCCESS; tsh |= (pte[1] & (HPTE_R_C | HPTE_R_R)) << 43; } kvmppc_set_gpr(vcpu, paramnr+(2*i), tsh); } mutex_unlock(&vcpu->kvm->arch.hpt_mutex); kvmppc_set_gpr(vcpu, 3, ret); return EMULATE_DONE; } static int kvmppc_h_pr_protect(struct kvm_vcpu *vcpu) { unsigned long flags = kvmppc_get_gpr(vcpu, 4); unsigned long pte_index = kvmppc_get_gpr(vcpu, 5); unsigned long avpn = kvmppc_get_gpr(vcpu, 6); unsigned long rb, pteg, r, v; unsigned long pte[2]; long int ret; pteg = get_pteg_addr(vcpu, pte_index); mutex_lock(&vcpu->kvm->arch.hpt_mutex); ret = H_FUNCTION; if (copy_from_user(pte, (void __user *)pteg, sizeof(pte))) goto done; pte[0] = be64_to_cpu((__force __be64)pte[0]); pte[1] = be64_to_cpu((__force __be64)pte[1]); ret = H_NOT_FOUND; if ((pte[0] & HPTE_V_VALID) == 0 || ((flags & H_AVPN) && (pte[0] & ~0x7fUL) != avpn)) goto done; v = pte[0]; r = pte[1]; r &= ~(HPTE_R_PP0 | HPTE_R_PP | HPTE_R_N | HPTE_R_KEY_HI | HPTE_R_KEY_LO); r |= (flags << 55) & HPTE_R_PP0; r |= (flags << 48) & HPTE_R_KEY_HI; r |= flags & (HPTE_R_PP | HPTE_R_N | HPTE_R_KEY_LO); pte[1] = r; rb = compute_tlbie_rb(v, r, pte_index); vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false); pte[0] = (__force u64)cpu_to_be64(pte[0]); pte[1] = (__force u64)cpu_to_be64(pte[1]); ret = H_FUNCTION; if (copy_to_user((void __user *)pteg, pte, sizeof(pte))) goto done; ret = H_SUCCESS; done: mutex_unlock(&vcpu->kvm->arch.hpt_mutex); kvmppc_set_gpr(vcpu, 3, ret); return EMULATE_DONE; } static int kvmppc_h_pr_logical_ci_load(struct kvm_vcpu *vcpu) { long rc; rc = kvmppc_h_logical_ci_load(vcpu); if (rc == H_TOO_HARD) return EMULATE_FAIL; kvmppc_set_gpr(vcpu, 3, rc); return EMULATE_DONE; } static int kvmppc_h_pr_logical_ci_store(struct kvm_vcpu *vcpu) { long rc; rc = kvmppc_h_logical_ci_store(vcpu); if (rc == H_TOO_HARD) return EMULATE_FAIL; kvmppc_set_gpr(vcpu, 3, rc); return EMULATE_DONE; } #ifdef CONFIG_SPAPR_TCE_IOMMU static int kvmppc_h_pr_put_tce(struct kvm_vcpu *vcpu) { unsigned long liobn = kvmppc_get_gpr(vcpu, 4); unsigned long ioba = kvmppc_get_gpr(vcpu, 5); unsigned long tce = kvmppc_get_gpr(vcpu, 6); long rc; rc = kvmppc_h_put_tce(vcpu, liobn, ioba, tce); if (rc == H_TOO_HARD) return EMULATE_FAIL; kvmppc_set_gpr(vcpu, 3, rc); return EMULATE_DONE; } static int kvmppc_h_pr_put_tce_indirect(struct kvm_vcpu *vcpu) { unsigned long liobn = kvmppc_get_gpr(vcpu, 4); unsigned long ioba = kvmppc_get_gpr(vcpu, 5); unsigned long tce = kvmppc_get_gpr(vcpu, 6); unsigned long npages = kvmppc_get_gpr(vcpu, 7); long rc; rc = kvmppc_h_put_tce_indirect(vcpu, liobn, ioba, tce, npages); if (rc == H_TOO_HARD) return EMULATE_FAIL; kvmppc_set_gpr(vcpu, 3, rc); return EMULATE_DONE; } static int kvmppc_h_pr_stuff_tce(struct kvm_vcpu *vcpu) { unsigned long liobn = kvmppc_get_gpr(vcpu, 4); unsigned long ioba = kvmppc_get_gpr(vcpu, 5); unsigned long tce_value = kvmppc_get_gpr(vcpu, 6); unsigned long npages = kvmppc_get_gpr(vcpu, 7); long rc; rc = kvmppc_h_stuff_tce(vcpu, liobn, ioba, tce_value, npages); if (rc == H_TOO_HARD) return EMULATE_FAIL; kvmppc_set_gpr(vcpu, 3, rc); return EMULATE_DONE; } #else /* CONFIG_SPAPR_TCE_IOMMU */ static int kvmppc_h_pr_put_tce(struct kvm_vcpu *vcpu) { return EMULATE_FAIL; } static int kvmppc_h_pr_put_tce_indirect(struct kvm_vcpu *vcpu) { return EMULATE_FAIL; } static int kvmppc_h_pr_stuff_tce(struct kvm_vcpu *vcpu) { return EMULATE_FAIL; } #endif /* CONFIG_SPAPR_TCE_IOMMU */ static int kvmppc_h_pr_xics_hcall(struct kvm_vcpu *vcpu, u32 cmd) { long rc = kvmppc_xics_hcall(vcpu, cmd); kvmppc_set_gpr(vcpu, 3, rc); return EMULATE_DONE; } int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd) { int rc, idx; if (cmd <= MAX_HCALL_OPCODE && !test_bit(cmd/4, vcpu->kvm->arch.enabled_hcalls)) return EMULATE_FAIL; switch (cmd) { case H_ENTER: return kvmppc_h_pr_enter(vcpu); case H_REMOVE: return kvmppc_h_pr_remove(vcpu); case H_PROTECT: return kvmppc_h_pr_protect(vcpu); case H_BULK_REMOVE: return kvmppc_h_pr_bulk_remove(vcpu); case H_PUT_TCE: return kvmppc_h_pr_put_tce(vcpu); case H_PUT_TCE_INDIRECT: return kvmppc_h_pr_put_tce_indirect(vcpu); case H_STUFF_TCE: return kvmppc_h_pr_stuff_tce(vcpu); case H_CEDE: kvmppc_set_msr_fast(vcpu, kvmppc_get_msr(vcpu) | MSR_EE); kvm_vcpu_block(vcpu); kvm_clear_request(KVM_REQ_UNHALT, vcpu); vcpu->stat.halt_wakeup++; return EMULATE_DONE; case H_LOGICAL_CI_LOAD: return kvmppc_h_pr_logical_ci_load(vcpu); case H_LOGICAL_CI_STORE: return kvmppc_h_pr_logical_ci_store(vcpu); case H_XIRR: case H_CPPR: case H_EOI: case H_IPI: case H_IPOLL: case H_XIRR_X: if (kvmppc_xics_enabled(vcpu)) return kvmppc_h_pr_xics_hcall(vcpu, cmd); break; case H_RTAS: if (list_empty(&vcpu->kvm->arch.rtas_tokens)) break; idx = srcu_read_lock(&vcpu->kvm->srcu); rc = kvmppc_rtas_hcall(vcpu); srcu_read_unlock(&vcpu->kvm->srcu, idx); if (rc) break; kvmppc_set_gpr(vcpu, 3, 0); return EMULATE_DONE; } return EMULATE_FAIL; } int kvmppc_hcall_impl_pr(unsigned long cmd) { switch (cmd) { case H_ENTER: case H_REMOVE: case H_PROTECT: case H_BULK_REMOVE: case H_PUT_TCE: case H_PUT_TCE_INDIRECT: case H_STUFF_TCE: case H_CEDE: case H_LOGICAL_CI_LOAD: case H_LOGICAL_CI_STORE: #ifdef CONFIG_KVM_XICS case H_XIRR: case H_CPPR: case H_EOI: case H_IPI: case H_IPOLL: case H_XIRR_X: #endif return 1; } return 0; } /* * List of hcall numbers to enable by default. * For compatibility with old userspace, we enable by default * all hcalls that were implemented before the hcall-enabling * facility was added. Note this list should not include H_RTAS. */ static unsigned int default_hcall_list[] = { H_ENTER, H_REMOVE, H_PROTECT, H_BULK_REMOVE, H_PUT_TCE, H_CEDE, #ifdef CONFIG_KVM_XICS H_XIRR, H_CPPR, H_EOI, H_IPI, H_IPOLL, H_XIRR_X, #endif 0 }; void kvmppc_pr_init_default_hcalls(struct kvm *kvm) { int i; unsigned int hcall; for (i = 0; default_hcall_list[i]; ++i) { hcall = default_hcall_list[i]; WARN_ON(!kvmppc_hcall_impl_pr(hcall)); __set_bit(hcall / 4, kvm->arch.enabled_hcalls); } } |