Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Kernel-based Virtual Machine driver for Linux |
| 3 | * |
| 4 | * derived from drivers/kvm/kvm_main.c |
| 5 | * |
| 6 | * Copyright (C) 2006 Qumranet, Inc. |
| 7 | * |
| 8 | * Authors: |
| 9 | * Avi Kivity <avi@qumranet.com> |
| 10 | * Yaniv Kamay <yaniv@qumranet.com> |
| 11 | * |
| 12 | * This work is licensed under the terms of the GNU GPL, version 2. See |
| 13 | * the COPYING file in the top-level directory. |
| 14 | * |
| 15 | */ |
| 16 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 17 | #include "kvm.h" |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 18 | #include "x86.h" |
Carsten Otte | 5fb76f9 | 2007-10-29 16:08:51 +0100 | [diff] [blame] | 19 | #include "segment_descriptor.h" |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 20 | #include "irq.h" |
| 21 | |
| 22 | #include <linux/kvm.h> |
| 23 | #include <linux/fs.h> |
| 24 | #include <linux/vmalloc.h> |
Carsten Otte | 5fb76f9 | 2007-10-29 16:08:51 +0100 | [diff] [blame] | 25 | #include <linux/module.h> |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 26 | |
| 27 | #include <asm/uaccess.h> |
| 28 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 29 | #define MAX_IO_MSRS 256 |
| 30 | |
Carsten Otte | 5fb76f9 | 2007-10-29 16:08:51 +0100 | [diff] [blame] | 31 | unsigned long segment_base(u16 selector) |
| 32 | { |
| 33 | struct descriptor_table gdt; |
| 34 | struct segment_descriptor *d; |
| 35 | unsigned long table_base; |
| 36 | unsigned long v; |
| 37 | |
| 38 | if (selector == 0) |
| 39 | return 0; |
| 40 | |
| 41 | asm("sgdt %0" : "=m"(gdt)); |
| 42 | table_base = gdt.base; |
| 43 | |
| 44 | if (selector & 4) { /* from ldt */ |
| 45 | u16 ldt_selector; |
| 46 | |
| 47 | asm("sldt %0" : "=g"(ldt_selector)); |
| 48 | table_base = segment_base(ldt_selector); |
| 49 | } |
| 50 | d = (struct segment_descriptor *)(table_base + (selector & ~7)); |
| 51 | v = d->base_low | ((unsigned long)d->base_mid << 16) | |
| 52 | ((unsigned long)d->base_high << 24); |
| 53 | #ifdef CONFIG_X86_64 |
| 54 | if (d->system == 0 && (d->type == 2 || d->type == 9 || d->type == 11)) |
| 55 | v |= ((unsigned long) \ |
| 56 | ((struct segment_descriptor_64 *)d)->base_higher) << 32; |
| 57 | #endif |
| 58 | return v; |
| 59 | } |
| 60 | EXPORT_SYMBOL_GPL(segment_base); |
| 61 | |
Carsten Otte | 6866b83 | 2007-10-29 16:09:10 +0100 | [diff] [blame^] | 62 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
| 63 | { |
| 64 | if (irqchip_in_kernel(vcpu->kvm)) |
| 65 | return vcpu->apic_base; |
| 66 | else |
| 67 | return vcpu->apic_base; |
| 68 | } |
| 69 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); |
| 70 | |
| 71 | void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data) |
| 72 | { |
| 73 | /* TODO: reserve bits check */ |
| 74 | if (irqchip_in_kernel(vcpu->kvm)) |
| 75 | kvm_lapic_set_base(vcpu, data); |
| 76 | else |
| 77 | vcpu->apic_base = data; |
| 78 | } |
| 79 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); |
| 80 | |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 81 | /* |
| 82 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS |
| 83 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. |
| 84 | * |
| 85 | * This list is modified at module load time to reflect the |
| 86 | * capabilities of the host cpu. |
| 87 | */ |
| 88 | static u32 msrs_to_save[] = { |
| 89 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, |
| 90 | MSR_K6_STAR, |
| 91 | #ifdef CONFIG_X86_64 |
| 92 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, |
| 93 | #endif |
| 94 | MSR_IA32_TIME_STAMP_COUNTER, |
| 95 | }; |
| 96 | |
| 97 | static unsigned num_msrs_to_save; |
| 98 | |
| 99 | static u32 emulated_msrs[] = { |
| 100 | MSR_IA32_MISC_ENABLE, |
| 101 | }; |
| 102 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 103 | /* |
| 104 | * Adapt set_msr() to msr_io()'s calling convention |
| 105 | */ |
| 106 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) |
| 107 | { |
| 108 | return kvm_set_msr(vcpu, index, *data); |
| 109 | } |
| 110 | |
| 111 | /* |
| 112 | * Read or write a bunch of msrs. All parameters are kernel addresses. |
| 113 | * |
| 114 | * @return number of msrs set successfully. |
| 115 | */ |
| 116 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, |
| 117 | struct kvm_msr_entry *entries, |
| 118 | int (*do_msr)(struct kvm_vcpu *vcpu, |
| 119 | unsigned index, u64 *data)) |
| 120 | { |
| 121 | int i; |
| 122 | |
| 123 | vcpu_load(vcpu); |
| 124 | |
| 125 | for (i = 0; i < msrs->nmsrs; ++i) |
| 126 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) |
| 127 | break; |
| 128 | |
| 129 | vcpu_put(vcpu); |
| 130 | |
| 131 | return i; |
| 132 | } |
| 133 | |
| 134 | /* |
| 135 | * Read or write a bunch of msrs. Parameters are user addresses. |
| 136 | * |
| 137 | * @return number of msrs set successfully. |
| 138 | */ |
| 139 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, |
| 140 | int (*do_msr)(struct kvm_vcpu *vcpu, |
| 141 | unsigned index, u64 *data), |
| 142 | int writeback) |
| 143 | { |
| 144 | struct kvm_msrs msrs; |
| 145 | struct kvm_msr_entry *entries; |
| 146 | int r, n; |
| 147 | unsigned size; |
| 148 | |
| 149 | r = -EFAULT; |
| 150 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) |
| 151 | goto out; |
| 152 | |
| 153 | r = -E2BIG; |
| 154 | if (msrs.nmsrs >= MAX_IO_MSRS) |
| 155 | goto out; |
| 156 | |
| 157 | r = -ENOMEM; |
| 158 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; |
| 159 | entries = vmalloc(size); |
| 160 | if (!entries) |
| 161 | goto out; |
| 162 | |
| 163 | r = -EFAULT; |
| 164 | if (copy_from_user(entries, user_msrs->entries, size)) |
| 165 | goto out_free; |
| 166 | |
| 167 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); |
| 168 | if (r < 0) |
| 169 | goto out_free; |
| 170 | |
| 171 | r = -EFAULT; |
| 172 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) |
| 173 | goto out_free; |
| 174 | |
| 175 | r = n; |
| 176 | |
| 177 | out_free: |
| 178 | vfree(entries); |
| 179 | out: |
| 180 | return r; |
| 181 | } |
| 182 | |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 183 | long kvm_arch_dev_ioctl(struct file *filp, |
| 184 | unsigned int ioctl, unsigned long arg) |
| 185 | { |
| 186 | void __user *argp = (void __user *)arg; |
| 187 | long r; |
| 188 | |
| 189 | switch (ioctl) { |
| 190 | case KVM_GET_MSR_INDEX_LIST: { |
| 191 | struct kvm_msr_list __user *user_msr_list = argp; |
| 192 | struct kvm_msr_list msr_list; |
| 193 | unsigned n; |
| 194 | |
| 195 | r = -EFAULT; |
| 196 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) |
| 197 | goto out; |
| 198 | n = msr_list.nmsrs; |
| 199 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); |
| 200 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) |
| 201 | goto out; |
| 202 | r = -E2BIG; |
| 203 | if (n < num_msrs_to_save) |
| 204 | goto out; |
| 205 | r = -EFAULT; |
| 206 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, |
| 207 | num_msrs_to_save * sizeof(u32))) |
| 208 | goto out; |
| 209 | if (copy_to_user(user_msr_list->indices |
| 210 | + num_msrs_to_save * sizeof(u32), |
| 211 | &emulated_msrs, |
| 212 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) |
| 213 | goto out; |
| 214 | r = 0; |
| 215 | break; |
| 216 | } |
| 217 | default: |
| 218 | r = -EINVAL; |
| 219 | } |
| 220 | out: |
| 221 | return r; |
| 222 | } |
| 223 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 224 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
| 225 | { |
| 226 | kvm_x86_ops->vcpu_load(vcpu, cpu); |
| 227 | } |
| 228 | |
| 229 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) |
| 230 | { |
| 231 | kvm_x86_ops->vcpu_put(vcpu); |
| 232 | } |
| 233 | |
| 234 | static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu) |
| 235 | { |
| 236 | u64 efer; |
| 237 | int i; |
| 238 | struct kvm_cpuid_entry *e, *entry; |
| 239 | |
| 240 | rdmsrl(MSR_EFER, efer); |
| 241 | entry = NULL; |
| 242 | for (i = 0; i < vcpu->cpuid_nent; ++i) { |
| 243 | e = &vcpu->cpuid_entries[i]; |
| 244 | if (e->function == 0x80000001) { |
| 245 | entry = e; |
| 246 | break; |
| 247 | } |
| 248 | } |
| 249 | if (entry && (entry->edx & (1 << 20)) && !(efer & EFER_NX)) { |
| 250 | entry->edx &= ~(1 << 20); |
| 251 | printk(KERN_INFO "kvm: guest NX capability removed\n"); |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, |
| 256 | struct kvm_cpuid *cpuid, |
| 257 | struct kvm_cpuid_entry __user *entries) |
| 258 | { |
| 259 | int r; |
| 260 | |
| 261 | r = -E2BIG; |
| 262 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) |
| 263 | goto out; |
| 264 | r = -EFAULT; |
| 265 | if (copy_from_user(&vcpu->cpuid_entries, entries, |
| 266 | cpuid->nent * sizeof(struct kvm_cpuid_entry))) |
| 267 | goto out; |
| 268 | vcpu->cpuid_nent = cpuid->nent; |
| 269 | cpuid_fix_nx_cap(vcpu); |
| 270 | return 0; |
| 271 | |
| 272 | out: |
| 273 | return r; |
| 274 | } |
| 275 | |
| 276 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
| 277 | struct kvm_lapic_state *s) |
| 278 | { |
| 279 | vcpu_load(vcpu); |
| 280 | memcpy(s->regs, vcpu->apic->regs, sizeof *s); |
| 281 | vcpu_put(vcpu); |
| 282 | |
| 283 | return 0; |
| 284 | } |
| 285 | |
| 286 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, |
| 287 | struct kvm_lapic_state *s) |
| 288 | { |
| 289 | vcpu_load(vcpu); |
| 290 | memcpy(vcpu->apic->regs, s->regs, sizeof *s); |
| 291 | kvm_apic_post_state_restore(vcpu); |
| 292 | vcpu_put(vcpu); |
| 293 | |
| 294 | return 0; |
| 295 | } |
| 296 | |
| 297 | long kvm_arch_vcpu_ioctl(struct file *filp, |
| 298 | unsigned int ioctl, unsigned long arg) |
| 299 | { |
| 300 | struct kvm_vcpu *vcpu = filp->private_data; |
| 301 | void __user *argp = (void __user *)arg; |
| 302 | int r; |
| 303 | |
| 304 | switch (ioctl) { |
| 305 | case KVM_GET_LAPIC: { |
| 306 | struct kvm_lapic_state lapic; |
| 307 | |
| 308 | memset(&lapic, 0, sizeof lapic); |
| 309 | r = kvm_vcpu_ioctl_get_lapic(vcpu, &lapic); |
| 310 | if (r) |
| 311 | goto out; |
| 312 | r = -EFAULT; |
| 313 | if (copy_to_user(argp, &lapic, sizeof lapic)) |
| 314 | goto out; |
| 315 | r = 0; |
| 316 | break; |
| 317 | } |
| 318 | case KVM_SET_LAPIC: { |
| 319 | struct kvm_lapic_state lapic; |
| 320 | |
| 321 | r = -EFAULT; |
| 322 | if (copy_from_user(&lapic, argp, sizeof lapic)) |
| 323 | goto out; |
| 324 | r = kvm_vcpu_ioctl_set_lapic(vcpu, &lapic);; |
| 325 | if (r) |
| 326 | goto out; |
| 327 | r = 0; |
| 328 | break; |
| 329 | } |
| 330 | case KVM_SET_CPUID: { |
| 331 | struct kvm_cpuid __user *cpuid_arg = argp; |
| 332 | struct kvm_cpuid cpuid; |
| 333 | |
| 334 | r = -EFAULT; |
| 335 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) |
| 336 | goto out; |
| 337 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); |
| 338 | if (r) |
| 339 | goto out; |
| 340 | break; |
| 341 | } |
| 342 | case KVM_GET_MSRS: |
| 343 | r = msr_io(vcpu, argp, kvm_get_msr, 1); |
| 344 | break; |
| 345 | case KVM_SET_MSRS: |
| 346 | r = msr_io(vcpu, argp, do_set_msr, 0); |
| 347 | break; |
| 348 | default: |
| 349 | r = -EINVAL; |
| 350 | } |
| 351 | out: |
| 352 | return r; |
| 353 | } |
| 354 | |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 355 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
| 356 | { |
| 357 | int ret; |
| 358 | |
| 359 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) |
| 360 | return -1; |
| 361 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); |
| 362 | return ret; |
| 363 | } |
| 364 | |
| 365 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, |
| 366 | u32 kvm_nr_mmu_pages) |
| 367 | { |
| 368 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) |
| 369 | return -EINVAL; |
| 370 | |
| 371 | mutex_lock(&kvm->lock); |
| 372 | |
| 373 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); |
| 374 | kvm->n_requested_mmu_pages = kvm_nr_mmu_pages; |
| 375 | |
| 376 | mutex_unlock(&kvm->lock); |
| 377 | return 0; |
| 378 | } |
| 379 | |
| 380 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) |
| 381 | { |
| 382 | return kvm->n_alloc_mmu_pages; |
| 383 | } |
| 384 | |
| 385 | /* |
| 386 | * Set a new alias region. Aliases map a portion of physical memory into |
| 387 | * another portion. This is useful for memory windows, for example the PC |
| 388 | * VGA region. |
| 389 | */ |
| 390 | static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm, |
| 391 | struct kvm_memory_alias *alias) |
| 392 | { |
| 393 | int r, n; |
| 394 | struct kvm_mem_alias *p; |
| 395 | |
| 396 | r = -EINVAL; |
| 397 | /* General sanity checks */ |
| 398 | if (alias->memory_size & (PAGE_SIZE - 1)) |
| 399 | goto out; |
| 400 | if (alias->guest_phys_addr & (PAGE_SIZE - 1)) |
| 401 | goto out; |
| 402 | if (alias->slot >= KVM_ALIAS_SLOTS) |
| 403 | goto out; |
| 404 | if (alias->guest_phys_addr + alias->memory_size |
| 405 | < alias->guest_phys_addr) |
| 406 | goto out; |
| 407 | if (alias->target_phys_addr + alias->memory_size |
| 408 | < alias->target_phys_addr) |
| 409 | goto out; |
| 410 | |
| 411 | mutex_lock(&kvm->lock); |
| 412 | |
| 413 | p = &kvm->aliases[alias->slot]; |
| 414 | p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT; |
| 415 | p->npages = alias->memory_size >> PAGE_SHIFT; |
| 416 | p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT; |
| 417 | |
| 418 | for (n = KVM_ALIAS_SLOTS; n > 0; --n) |
| 419 | if (kvm->aliases[n - 1].npages) |
| 420 | break; |
| 421 | kvm->naliases = n; |
| 422 | |
| 423 | kvm_mmu_zap_all(kvm); |
| 424 | |
| 425 | mutex_unlock(&kvm->lock); |
| 426 | |
| 427 | return 0; |
| 428 | |
| 429 | out: |
| 430 | return r; |
| 431 | } |
| 432 | |
| 433 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) |
| 434 | { |
| 435 | int r; |
| 436 | |
| 437 | r = 0; |
| 438 | switch (chip->chip_id) { |
| 439 | case KVM_IRQCHIP_PIC_MASTER: |
| 440 | memcpy(&chip->chip.pic, |
| 441 | &pic_irqchip(kvm)->pics[0], |
| 442 | sizeof(struct kvm_pic_state)); |
| 443 | break; |
| 444 | case KVM_IRQCHIP_PIC_SLAVE: |
| 445 | memcpy(&chip->chip.pic, |
| 446 | &pic_irqchip(kvm)->pics[1], |
| 447 | sizeof(struct kvm_pic_state)); |
| 448 | break; |
| 449 | case KVM_IRQCHIP_IOAPIC: |
| 450 | memcpy(&chip->chip.ioapic, |
| 451 | ioapic_irqchip(kvm), |
| 452 | sizeof(struct kvm_ioapic_state)); |
| 453 | break; |
| 454 | default: |
| 455 | r = -EINVAL; |
| 456 | break; |
| 457 | } |
| 458 | return r; |
| 459 | } |
| 460 | |
| 461 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) |
| 462 | { |
| 463 | int r; |
| 464 | |
| 465 | r = 0; |
| 466 | switch (chip->chip_id) { |
| 467 | case KVM_IRQCHIP_PIC_MASTER: |
| 468 | memcpy(&pic_irqchip(kvm)->pics[0], |
| 469 | &chip->chip.pic, |
| 470 | sizeof(struct kvm_pic_state)); |
| 471 | break; |
| 472 | case KVM_IRQCHIP_PIC_SLAVE: |
| 473 | memcpy(&pic_irqchip(kvm)->pics[1], |
| 474 | &chip->chip.pic, |
| 475 | sizeof(struct kvm_pic_state)); |
| 476 | break; |
| 477 | case KVM_IRQCHIP_IOAPIC: |
| 478 | memcpy(ioapic_irqchip(kvm), |
| 479 | &chip->chip.ioapic, |
| 480 | sizeof(struct kvm_ioapic_state)); |
| 481 | break; |
| 482 | default: |
| 483 | r = -EINVAL; |
| 484 | break; |
| 485 | } |
| 486 | kvm_pic_update_irq(pic_irqchip(kvm)); |
| 487 | return r; |
| 488 | } |
| 489 | |
| 490 | long kvm_arch_vm_ioctl(struct file *filp, |
| 491 | unsigned int ioctl, unsigned long arg) |
| 492 | { |
| 493 | struct kvm *kvm = filp->private_data; |
| 494 | void __user *argp = (void __user *)arg; |
| 495 | int r = -EINVAL; |
| 496 | |
| 497 | switch (ioctl) { |
| 498 | case KVM_SET_TSS_ADDR: |
| 499 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); |
| 500 | if (r < 0) |
| 501 | goto out; |
| 502 | break; |
| 503 | case KVM_SET_MEMORY_REGION: { |
| 504 | struct kvm_memory_region kvm_mem; |
| 505 | struct kvm_userspace_memory_region kvm_userspace_mem; |
| 506 | |
| 507 | r = -EFAULT; |
| 508 | if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem)) |
| 509 | goto out; |
| 510 | kvm_userspace_mem.slot = kvm_mem.slot; |
| 511 | kvm_userspace_mem.flags = kvm_mem.flags; |
| 512 | kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr; |
| 513 | kvm_userspace_mem.memory_size = kvm_mem.memory_size; |
| 514 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0); |
| 515 | if (r) |
| 516 | goto out; |
| 517 | break; |
| 518 | } |
| 519 | case KVM_SET_NR_MMU_PAGES: |
| 520 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); |
| 521 | if (r) |
| 522 | goto out; |
| 523 | break; |
| 524 | case KVM_GET_NR_MMU_PAGES: |
| 525 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); |
| 526 | break; |
| 527 | case KVM_SET_MEMORY_ALIAS: { |
| 528 | struct kvm_memory_alias alias; |
| 529 | |
| 530 | r = -EFAULT; |
| 531 | if (copy_from_user(&alias, argp, sizeof alias)) |
| 532 | goto out; |
| 533 | r = kvm_vm_ioctl_set_memory_alias(kvm, &alias); |
| 534 | if (r) |
| 535 | goto out; |
| 536 | break; |
| 537 | } |
| 538 | case KVM_CREATE_IRQCHIP: |
| 539 | r = -ENOMEM; |
| 540 | kvm->vpic = kvm_create_pic(kvm); |
| 541 | if (kvm->vpic) { |
| 542 | r = kvm_ioapic_init(kvm); |
| 543 | if (r) { |
| 544 | kfree(kvm->vpic); |
| 545 | kvm->vpic = NULL; |
| 546 | goto out; |
| 547 | } |
| 548 | } else |
| 549 | goto out; |
| 550 | break; |
| 551 | case KVM_IRQ_LINE: { |
| 552 | struct kvm_irq_level irq_event; |
| 553 | |
| 554 | r = -EFAULT; |
| 555 | if (copy_from_user(&irq_event, argp, sizeof irq_event)) |
| 556 | goto out; |
| 557 | if (irqchip_in_kernel(kvm)) { |
| 558 | mutex_lock(&kvm->lock); |
| 559 | if (irq_event.irq < 16) |
| 560 | kvm_pic_set_irq(pic_irqchip(kvm), |
| 561 | irq_event.irq, |
| 562 | irq_event.level); |
| 563 | kvm_ioapic_set_irq(kvm->vioapic, |
| 564 | irq_event.irq, |
| 565 | irq_event.level); |
| 566 | mutex_unlock(&kvm->lock); |
| 567 | r = 0; |
| 568 | } |
| 569 | break; |
| 570 | } |
| 571 | case KVM_GET_IRQCHIP: { |
| 572 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ |
| 573 | struct kvm_irqchip chip; |
| 574 | |
| 575 | r = -EFAULT; |
| 576 | if (copy_from_user(&chip, argp, sizeof chip)) |
| 577 | goto out; |
| 578 | r = -ENXIO; |
| 579 | if (!irqchip_in_kernel(kvm)) |
| 580 | goto out; |
| 581 | r = kvm_vm_ioctl_get_irqchip(kvm, &chip); |
| 582 | if (r) |
| 583 | goto out; |
| 584 | r = -EFAULT; |
| 585 | if (copy_to_user(argp, &chip, sizeof chip)) |
| 586 | goto out; |
| 587 | r = 0; |
| 588 | break; |
| 589 | } |
| 590 | case KVM_SET_IRQCHIP: { |
| 591 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ |
| 592 | struct kvm_irqchip chip; |
| 593 | |
| 594 | r = -EFAULT; |
| 595 | if (copy_from_user(&chip, argp, sizeof chip)) |
| 596 | goto out; |
| 597 | r = -ENXIO; |
| 598 | if (!irqchip_in_kernel(kvm)) |
| 599 | goto out; |
| 600 | r = kvm_vm_ioctl_set_irqchip(kvm, &chip); |
| 601 | if (r) |
| 602 | goto out; |
| 603 | r = 0; |
| 604 | break; |
| 605 | } |
| 606 | default: |
| 607 | ; |
| 608 | } |
| 609 | out: |
| 610 | return r; |
| 611 | } |
| 612 | |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 613 | static __init void kvm_init_msr_list(void) |
| 614 | { |
| 615 | u32 dummy[2]; |
| 616 | unsigned i, j; |
| 617 | |
| 618 | for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) { |
| 619 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) |
| 620 | continue; |
| 621 | if (j < i) |
| 622 | msrs_to_save[j] = msrs_to_save[i]; |
| 623 | j++; |
| 624 | } |
| 625 | num_msrs_to_save = j; |
| 626 | } |
| 627 | |
| 628 | __init void kvm_arch_init(void) |
| 629 | { |
| 630 | kvm_init_msr_list(); |
| 631 | } |