Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * s390host.c -- hosting zSeries kernel virtual machines |
| 3 | * |
| 4 | * Copyright IBM Corp. 2008 |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License (version 2 only) |
| 8 | * as published by the Free Software Foundation. |
| 9 | * |
| 10 | * Author(s): Carsten Otte <cotte@de.ibm.com> |
| 11 | * Christian Borntraeger <borntraeger@de.ibm.com> |
| 12 | * Heiko Carstens <heiko.carstens@de.ibm.com> |
| 13 | */ |
| 14 | |
| 15 | #include <linux/compiler.h> |
| 16 | #include <linux/err.h> |
| 17 | #include <linux/fs.h> |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/kvm.h> |
| 20 | #include <linux/kvm_host.h> |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/slab.h> |
| 23 | #include <asm/lowcore.h> |
| 24 | #include <asm/pgtable.h> |
| 25 | |
| 26 | #include "gaccess.h" |
| 27 | |
| 28 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU |
| 29 | |
| 30 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
| 31 | { "userspace_handled", VCPU_STAT(exit_userspace) }, |
| 32 | { NULL } |
| 33 | }; |
| 34 | |
| 35 | |
| 36 | /* Section: not file related */ |
| 37 | void kvm_arch_hardware_enable(void *garbage) |
| 38 | { |
| 39 | /* every s390 is virtualization enabled ;-) */ |
| 40 | } |
| 41 | |
| 42 | void kvm_arch_hardware_disable(void *garbage) |
| 43 | { |
| 44 | } |
| 45 | |
| 46 | void decache_vcpus_on_cpu(int cpu) |
| 47 | { |
| 48 | } |
| 49 | |
| 50 | int kvm_arch_hardware_setup(void) |
| 51 | { |
| 52 | return 0; |
| 53 | } |
| 54 | |
| 55 | void kvm_arch_hardware_unsetup(void) |
| 56 | { |
| 57 | } |
| 58 | |
| 59 | void kvm_arch_check_processor_compat(void *rtn) |
| 60 | { |
| 61 | } |
| 62 | |
| 63 | int kvm_arch_init(void *opaque) |
| 64 | { |
| 65 | return 0; |
| 66 | } |
| 67 | |
| 68 | void kvm_arch_exit(void) |
| 69 | { |
| 70 | } |
| 71 | |
| 72 | /* Section: device related */ |
| 73 | long kvm_arch_dev_ioctl(struct file *filp, |
| 74 | unsigned int ioctl, unsigned long arg) |
| 75 | { |
| 76 | if (ioctl == KVM_S390_ENABLE_SIE) |
| 77 | return s390_enable_sie(); |
| 78 | return -EINVAL; |
| 79 | } |
| 80 | |
| 81 | int kvm_dev_ioctl_check_extension(long ext) |
| 82 | { |
| 83 | return 0; |
| 84 | } |
| 85 | |
| 86 | /* Section: vm related */ |
| 87 | /* |
| 88 | * Get (and clear) the dirty memory log for a memory slot. |
| 89 | */ |
| 90 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, |
| 91 | struct kvm_dirty_log *log) |
| 92 | { |
| 93 | return 0; |
| 94 | } |
| 95 | |
| 96 | long kvm_arch_vm_ioctl(struct file *filp, |
| 97 | unsigned int ioctl, unsigned long arg) |
| 98 | { |
| 99 | struct kvm *kvm = filp->private_data; |
| 100 | void __user *argp = (void __user *)arg; |
| 101 | int r; |
| 102 | |
| 103 | switch (ioctl) { |
| 104 | default: |
| 105 | r = -EINVAL; |
| 106 | } |
| 107 | |
| 108 | return r; |
| 109 | } |
| 110 | |
| 111 | struct kvm *kvm_arch_create_vm(void) |
| 112 | { |
| 113 | struct kvm *kvm; |
| 114 | int rc; |
| 115 | char debug_name[16]; |
| 116 | |
| 117 | rc = s390_enable_sie(); |
| 118 | if (rc) |
| 119 | goto out_nokvm; |
| 120 | |
| 121 | rc = -ENOMEM; |
| 122 | kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); |
| 123 | if (!kvm) |
| 124 | goto out_nokvm; |
| 125 | |
| 126 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); |
| 127 | if (!kvm->arch.sca) |
| 128 | goto out_nosca; |
| 129 | |
| 130 | sprintf(debug_name, "kvm-%u", current->pid); |
| 131 | |
| 132 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); |
| 133 | if (!kvm->arch.dbf) |
| 134 | goto out_nodbf; |
| 135 | |
| 136 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
| 137 | VM_EVENT(kvm, 3, "%s", "vm created"); |
| 138 | |
| 139 | try_module_get(THIS_MODULE); |
| 140 | |
| 141 | return kvm; |
| 142 | out_nodbf: |
| 143 | free_page((unsigned long)(kvm->arch.sca)); |
| 144 | out_nosca: |
| 145 | kfree(kvm); |
| 146 | out_nokvm: |
| 147 | return ERR_PTR(rc); |
| 148 | } |
| 149 | |
| 150 | void kvm_arch_destroy_vm(struct kvm *kvm) |
| 151 | { |
| 152 | debug_unregister(kvm->arch.dbf); |
| 153 | free_page((unsigned long)(kvm->arch.sca)); |
| 154 | kfree(kvm); |
| 155 | module_put(THIS_MODULE); |
| 156 | } |
| 157 | |
| 158 | /* Section: vcpu related */ |
| 159 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
| 160 | { |
| 161 | return 0; |
| 162 | } |
| 163 | |
| 164 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) |
| 165 | { |
| 166 | /* kvm common code refers to this, but does'nt call it */ |
| 167 | BUG(); |
| 168 | } |
| 169 | |
| 170 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
| 171 | { |
| 172 | save_fp_regs(&vcpu->arch.host_fpregs); |
| 173 | save_access_regs(vcpu->arch.host_acrs); |
| 174 | vcpu->arch.guest_fpregs.fpc &= FPC_VALID_MASK; |
| 175 | restore_fp_regs(&vcpu->arch.guest_fpregs); |
| 176 | restore_access_regs(vcpu->arch.guest_acrs); |
| 177 | |
| 178 | if (signal_pending(current)) |
| 179 | atomic_set_mask(CPUSTAT_STOP_INT, |
| 180 | &vcpu->arch.sie_block->cpuflags); |
| 181 | } |
| 182 | |
| 183 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) |
| 184 | { |
| 185 | save_fp_regs(&vcpu->arch.guest_fpregs); |
| 186 | save_access_regs(vcpu->arch.guest_acrs); |
| 187 | restore_fp_regs(&vcpu->arch.host_fpregs); |
| 188 | restore_access_regs(vcpu->arch.host_acrs); |
| 189 | } |
| 190 | |
| 191 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) |
| 192 | { |
| 193 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ |
| 194 | vcpu->arch.sie_block->gpsw.mask = 0UL; |
| 195 | vcpu->arch.sie_block->gpsw.addr = 0UL; |
| 196 | vcpu->arch.sie_block->prefix = 0UL; |
| 197 | vcpu->arch.sie_block->ihcpu = 0xffff; |
| 198 | vcpu->arch.sie_block->cputm = 0UL; |
| 199 | vcpu->arch.sie_block->ckc = 0UL; |
| 200 | vcpu->arch.sie_block->todpr = 0; |
| 201 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); |
| 202 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; |
| 203 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; |
| 204 | vcpu->arch.guest_fpregs.fpc = 0; |
| 205 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); |
| 206 | vcpu->arch.sie_block->gbea = 1; |
| 207 | } |
| 208 | |
| 209 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
| 210 | { |
| 211 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH); |
| 212 | vcpu->arch.sie_block->gmslm = 0xffffffffffUL; |
| 213 | vcpu->arch.sie_block->gmsor = 0x000000000000; |
| 214 | vcpu->arch.sie_block->ecb = 2; |
| 215 | vcpu->arch.sie_block->eca = 0xC1002001U; |
| 216 | |
| 217 | return 0; |
| 218 | } |
| 219 | |
| 220 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, |
| 221 | unsigned int id) |
| 222 | { |
| 223 | struct kvm_vcpu *vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL); |
| 224 | int rc = -ENOMEM; |
| 225 | |
| 226 | if (!vcpu) |
| 227 | goto out_nomem; |
| 228 | |
| 229 | vcpu->arch.sie_block = (struct sie_block *) get_zeroed_page(GFP_KERNEL); |
| 230 | |
| 231 | if (!vcpu->arch.sie_block) |
| 232 | goto out_free_cpu; |
| 233 | |
| 234 | vcpu->arch.sie_block->icpua = id; |
| 235 | BUG_ON(!kvm->arch.sca); |
| 236 | BUG_ON(kvm->arch.sca->cpu[id].sda); |
| 237 | kvm->arch.sca->cpu[id].sda = (__u64) vcpu->arch.sie_block; |
| 238 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)kvm->arch.sca) >> 32); |
| 239 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; |
| 240 | |
| 241 | rc = kvm_vcpu_init(vcpu, kvm, id); |
| 242 | if (rc) |
| 243 | goto out_free_cpu; |
| 244 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, |
| 245 | vcpu->arch.sie_block); |
| 246 | |
| 247 | try_module_get(THIS_MODULE); |
| 248 | |
| 249 | return vcpu; |
| 250 | out_free_cpu: |
| 251 | kfree(vcpu); |
| 252 | out_nomem: |
| 253 | return ERR_PTR(rc); |
| 254 | } |
| 255 | |
| 256 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
| 257 | { |
| 258 | VCPU_EVENT(vcpu, 3, "%s", "destroy cpu"); |
| 259 | free_page((unsigned long)(vcpu->arch.sie_block)); |
| 260 | kfree(vcpu); |
| 261 | module_put(THIS_MODULE); |
| 262 | } |
| 263 | |
| 264 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
| 265 | { |
| 266 | /* kvm common code refers to this, but never calls it */ |
| 267 | BUG(); |
| 268 | return 0; |
| 269 | } |
| 270 | |
| 271 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
| 272 | { |
| 273 | vcpu_load(vcpu); |
| 274 | kvm_s390_vcpu_initial_reset(vcpu); |
| 275 | vcpu_put(vcpu); |
| 276 | return 0; |
| 277 | } |
| 278 | |
| 279 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
| 280 | { |
| 281 | vcpu_load(vcpu); |
| 282 | memcpy(&vcpu->arch.guest_gprs, ®s->gprs, sizeof(regs->gprs)); |
| 283 | vcpu_put(vcpu); |
| 284 | return 0; |
| 285 | } |
| 286 | |
| 287 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
| 288 | { |
| 289 | vcpu_load(vcpu); |
| 290 | memcpy(®s->gprs, &vcpu->arch.guest_gprs, sizeof(regs->gprs)); |
| 291 | vcpu_put(vcpu); |
| 292 | return 0; |
| 293 | } |
| 294 | |
| 295 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
| 296 | struct kvm_sregs *sregs) |
| 297 | { |
| 298 | vcpu_load(vcpu); |
| 299 | memcpy(&vcpu->arch.guest_acrs, &sregs->acrs, sizeof(sregs->acrs)); |
| 300 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
| 301 | vcpu_put(vcpu); |
| 302 | return 0; |
| 303 | } |
| 304 | |
| 305 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |
| 306 | struct kvm_sregs *sregs) |
| 307 | { |
| 308 | vcpu_load(vcpu); |
| 309 | memcpy(&sregs->acrs, &vcpu->arch.guest_acrs, sizeof(sregs->acrs)); |
| 310 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
| 311 | vcpu_put(vcpu); |
| 312 | return 0; |
| 313 | } |
| 314 | |
| 315 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
| 316 | { |
| 317 | vcpu_load(vcpu); |
| 318 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
| 319 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; |
| 320 | vcpu_put(vcpu); |
| 321 | return 0; |
| 322 | } |
| 323 | |
| 324 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
| 325 | { |
| 326 | vcpu_load(vcpu); |
| 327 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); |
| 328 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; |
| 329 | vcpu_put(vcpu); |
| 330 | return 0; |
| 331 | } |
| 332 | |
| 333 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) |
| 334 | { |
| 335 | int rc = 0; |
| 336 | |
| 337 | vcpu_load(vcpu); |
| 338 | if (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_RUNNING) |
| 339 | rc = -EBUSY; |
| 340 | else |
| 341 | vcpu->arch.sie_block->gpsw = psw; |
| 342 | vcpu_put(vcpu); |
| 343 | return rc; |
| 344 | } |
| 345 | |
| 346 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, |
| 347 | struct kvm_translation *tr) |
| 348 | { |
| 349 | return -EINVAL; /* not implemented yet */ |
| 350 | } |
| 351 | |
| 352 | int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu, |
| 353 | struct kvm_debug_guest *dbg) |
| 354 | { |
| 355 | return -EINVAL; /* not implemented yet */ |
| 356 | } |
| 357 | |
| 358 | static void __vcpu_run(struct kvm_vcpu *vcpu) |
| 359 | { |
| 360 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->arch.guest_gprs[14], 16); |
| 361 | |
| 362 | if (need_resched()) |
| 363 | schedule(); |
| 364 | |
| 365 | vcpu->arch.sie_block->icptcode = 0; |
| 366 | local_irq_disable(); |
| 367 | kvm_guest_enter(); |
| 368 | local_irq_enable(); |
| 369 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", |
| 370 | atomic_read(&vcpu->arch.sie_block->cpuflags)); |
| 371 | sie64a(vcpu->arch.sie_block, vcpu->arch.guest_gprs); |
| 372 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
| 373 | vcpu->arch.sie_block->icptcode); |
| 374 | local_irq_disable(); |
| 375 | kvm_guest_exit(); |
| 376 | local_irq_enable(); |
| 377 | |
| 378 | memcpy(&vcpu->arch.guest_gprs[14], &vcpu->arch.sie_block->gg14, 16); |
| 379 | } |
| 380 | |
| 381 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 382 | { |
| 383 | sigset_t sigsaved; |
| 384 | |
| 385 | vcpu_load(vcpu); |
| 386 | |
| 387 | if (vcpu->sigset_active) |
| 388 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); |
| 389 | |
| 390 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
| 391 | |
| 392 | __vcpu_run(vcpu); |
| 393 | |
| 394 | if (vcpu->sigset_active) |
| 395 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); |
| 396 | |
| 397 | vcpu_put(vcpu); |
| 398 | |
| 399 | vcpu->stat.exit_userspace++; |
| 400 | return 0; |
| 401 | } |
| 402 | |
| 403 | static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, const void *from, |
| 404 | unsigned long n, int prefix) |
| 405 | { |
| 406 | if (prefix) |
| 407 | return copy_to_guest(vcpu, guestdest, from, n); |
| 408 | else |
| 409 | return copy_to_guest_absolute(vcpu, guestdest, from, n); |
| 410 | } |
| 411 | |
| 412 | /* |
| 413 | * store status at address |
| 414 | * we use have two special cases: |
| 415 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit |
| 416 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix |
| 417 | */ |
| 418 | int __kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
| 419 | { |
| 420 | const unsigned char archmode = 1; |
| 421 | int prefix; |
| 422 | |
| 423 | if (addr == KVM_S390_STORE_STATUS_NOADDR) { |
| 424 | if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1)) |
| 425 | return -EFAULT; |
| 426 | addr = SAVE_AREA_BASE; |
| 427 | prefix = 0; |
| 428 | } else if (addr == KVM_S390_STORE_STATUS_PREFIXED) { |
| 429 | if (copy_to_guest(vcpu, 163ul, &archmode, 1)) |
| 430 | return -EFAULT; |
| 431 | addr = SAVE_AREA_BASE; |
| 432 | prefix = 1; |
| 433 | } else |
| 434 | prefix = 0; |
| 435 | |
| 436 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, fp_regs), |
| 437 | vcpu->arch.guest_fpregs.fprs, 128, prefix)) |
| 438 | return -EFAULT; |
| 439 | |
| 440 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, gp_regs), |
| 441 | vcpu->arch.guest_gprs, 128, prefix)) |
| 442 | return -EFAULT; |
| 443 | |
| 444 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, psw), |
| 445 | &vcpu->arch.sie_block->gpsw, 16, prefix)) |
| 446 | return -EFAULT; |
| 447 | |
| 448 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, pref_reg), |
| 449 | &vcpu->arch.sie_block->prefix, 4, prefix)) |
| 450 | return -EFAULT; |
| 451 | |
| 452 | if (__guestcopy(vcpu, |
| 453 | addr + offsetof(struct save_area_s390x, fp_ctrl_reg), |
| 454 | &vcpu->arch.guest_fpregs.fpc, 4, prefix)) |
| 455 | return -EFAULT; |
| 456 | |
| 457 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, tod_reg), |
| 458 | &vcpu->arch.sie_block->todpr, 4, prefix)) |
| 459 | return -EFAULT; |
| 460 | |
| 461 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, timer), |
| 462 | &vcpu->arch.sie_block->cputm, 8, prefix)) |
| 463 | return -EFAULT; |
| 464 | |
| 465 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, clk_cmp), |
| 466 | &vcpu->arch.sie_block->ckc, 8, prefix)) |
| 467 | return -EFAULT; |
| 468 | |
| 469 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, acc_regs), |
| 470 | &vcpu->arch.guest_acrs, 64, prefix)) |
| 471 | return -EFAULT; |
| 472 | |
| 473 | if (__guestcopy(vcpu, |
| 474 | addr + offsetof(struct save_area_s390x, ctrl_regs), |
| 475 | &vcpu->arch.sie_block->gcr, 128, prefix)) |
| 476 | return -EFAULT; |
| 477 | return 0; |
| 478 | } |
| 479 | |
| 480 | static int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
| 481 | { |
| 482 | int rc; |
| 483 | |
| 484 | vcpu_load(vcpu); |
| 485 | rc = __kvm_s390_vcpu_store_status(vcpu, addr); |
| 486 | vcpu_put(vcpu); |
| 487 | return rc; |
| 488 | } |
| 489 | |
| 490 | long kvm_arch_vcpu_ioctl(struct file *filp, |
| 491 | unsigned int ioctl, unsigned long arg) |
| 492 | { |
| 493 | struct kvm_vcpu *vcpu = filp->private_data; |
| 494 | void __user *argp = (void __user *)arg; |
| 495 | |
| 496 | switch (ioctl) { |
| 497 | case KVM_S390_STORE_STATUS: |
| 498 | return kvm_s390_vcpu_store_status(vcpu, arg); |
| 499 | case KVM_S390_SET_INITIAL_PSW: { |
| 500 | psw_t psw; |
| 501 | |
| 502 | if (copy_from_user(&psw, argp, sizeof(psw))) |
| 503 | return -EFAULT; |
| 504 | return kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); |
| 505 | } |
| 506 | case KVM_S390_INITIAL_RESET: |
| 507 | return kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
| 508 | default: |
| 509 | ; |
| 510 | } |
| 511 | return -EINVAL; |
| 512 | } |
| 513 | |
| 514 | /* Section: memory related */ |
| 515 | int kvm_arch_set_memory_region(struct kvm *kvm, |
| 516 | struct kvm_userspace_memory_region *mem, |
| 517 | struct kvm_memory_slot old, |
| 518 | int user_alloc) |
| 519 | { |
| 520 | /* A few sanity checks. We can have exactly one memory slot which has |
| 521 | to start at guest virtual zero and which has to be located at a |
| 522 | page boundary in userland and which has to end at a page boundary. |
| 523 | The memory in userland is ok to be fragmented into various different |
| 524 | vmas. It is okay to mmap() and munmap() stuff in this slot after |
| 525 | doing this call at any time */ |
| 526 | |
| 527 | if (mem->slot) |
| 528 | return -EINVAL; |
| 529 | |
| 530 | if (mem->guest_phys_addr) |
| 531 | return -EINVAL; |
| 532 | |
| 533 | if (mem->userspace_addr & (PAGE_SIZE - 1)) |
| 534 | return -EINVAL; |
| 535 | |
| 536 | if (mem->memory_size & (PAGE_SIZE - 1)) |
| 537 | return -EINVAL; |
| 538 | |
| 539 | kvm->arch.guest_origin = mem->userspace_addr; |
| 540 | kvm->arch.guest_memsize = mem->memory_size; |
| 541 | |
| 542 | /* FIXME: we do want to interrupt running CPUs and update their memory |
| 543 | configuration now to avoid race conditions. But hey, changing the |
| 544 | memory layout while virtual CPUs are running is usually bad |
| 545 | programming practice. */ |
| 546 | |
| 547 | return 0; |
| 548 | } |
| 549 | |
| 550 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) |
| 551 | { |
| 552 | return gfn; |
| 553 | } |
| 554 | |
| 555 | static int __init kvm_s390_init(void) |
| 556 | { |
| 557 | return kvm_init(NULL, sizeof(struct kvm_vcpu), THIS_MODULE); |
| 558 | } |
| 559 | |
| 560 | static void __exit kvm_s390_exit(void) |
| 561 | { |
| 562 | kvm_exit(); |
| 563 | } |
| 564 | |
| 565 | module_init(kvm_s390_init); |
| 566 | module_exit(kvm_s390_exit); |