cpuid.c (573cc0e5cf142d9992d2de3502800890fc717bc0) cpuid.c (b4f69df0f65e97fec439130a0d0a8b9c7cc02df2)
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Kernel-based Virtual Machine driver for Linux
4 * cpuid support routines
5 *
6 * derived from arch/x86/kvm/x86.c
7 *
8 * Copyright 2011 Red Hat, Inc. and/or its affiliates.

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309void kvm_update_cpuid_runtime(struct kvm_vcpu *vcpu)
310{
311 __kvm_update_cpuid_runtime(vcpu, vcpu->arch.cpuid_entries, vcpu->arch.cpuid_nent);
312}
313EXPORT_SYMBOL_GPL(kvm_update_cpuid_runtime);
314
315static bool kvm_cpuid_has_hyperv(struct kvm_cpuid_entry2 *entries, int nent)
316{
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Kernel-based Virtual Machine driver for Linux
4 * cpuid support routines
5 *
6 * derived from arch/x86/kvm/x86.c
7 *
8 * Copyright 2011 Red Hat, Inc. and/or its affiliates.

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309void kvm_update_cpuid_runtime(struct kvm_vcpu *vcpu)
310{
311 __kvm_update_cpuid_runtime(vcpu, vcpu->arch.cpuid_entries, vcpu->arch.cpuid_nent);
312}
313EXPORT_SYMBOL_GPL(kvm_update_cpuid_runtime);
314
315static bool kvm_cpuid_has_hyperv(struct kvm_cpuid_entry2 *entries, int nent)
316{
317#ifdef CONFIG_KVM_HYPERV
317 struct kvm_cpuid_entry2 *entry;
318
319 entry = cpuid_entry2_find(entries, nent, HYPERV_CPUID_INTERFACE,
320 KVM_CPUID_INDEX_NOT_SIGNIFICANT);
321 return entry && entry->eax == HYPERV_CPUID_SIGNATURE_EAX;
318 struct kvm_cpuid_entry2 *entry;
319
320 entry = cpuid_entry2_find(entries, nent, HYPERV_CPUID_INTERFACE,
321 KVM_CPUID_INDEX_NOT_SIGNIFICANT);
322 return entry && entry->eax == HYPERV_CPUID_SIGNATURE_EAX;
323#else
324 return false;
325#endif
322}
323
324static void kvm_vcpu_after_set_cpuid(struct kvm_vcpu *vcpu)
325{
326 struct kvm_lapic *apic = vcpu->arch.apic;
327 struct kvm_cpuid_entry2 *best;
328 bool allow_gbpages;
329

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428 r = kvm_cpuid_check_equal(vcpu, e2, nent);
429 if (r)
430 return r;
431
432 kvfree(e2);
433 return 0;
434 }
435
326}
327
328static void kvm_vcpu_after_set_cpuid(struct kvm_vcpu *vcpu)
329{
330 struct kvm_lapic *apic = vcpu->arch.apic;
331 struct kvm_cpuid_entry2 *best;
332 bool allow_gbpages;
333

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432 r = kvm_cpuid_check_equal(vcpu, e2, nent);
433 if (r)
434 return r;
435
436 kvfree(e2);
437 return 0;
438 }
439
440#ifdef CONFIG_KVM_HYPERV
436 if (kvm_cpuid_has_hyperv(e2, nent)) {
437 r = kvm_hv_vcpu_init(vcpu);
438 if (r)
439 return r;
440 }
441 if (kvm_cpuid_has_hyperv(e2, nent)) {
442 r = kvm_hv_vcpu_init(vcpu);
443 if (r)
444 return r;
445 }
446#endif
441
442 r = kvm_check_cpuid(vcpu, e2, nent);
443 if (r)
444 return r;
445
446 kvfree(vcpu->arch.cpuid_entries);
447 vcpu->arch.cpuid_entries = e2;
448 vcpu->arch.cpuid_nent = nent;

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464 int r, i;
465 struct kvm_cpuid_entry *e = NULL;
466 struct kvm_cpuid_entry2 *e2 = NULL;
467
468 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
469 return -E2BIG;
470
471 if (cpuid->nent) {
447
448 r = kvm_check_cpuid(vcpu, e2, nent);
449 if (r)
450 return r;
451
452 kvfree(vcpu->arch.cpuid_entries);
453 vcpu->arch.cpuid_entries = e2;
454 vcpu->arch.cpuid_nent = nent;

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470 int r, i;
471 struct kvm_cpuid_entry *e = NULL;
472 struct kvm_cpuid_entry2 *e2 = NULL;
473
474 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
475 return -E2BIG;
476
477 if (cpuid->nent) {
472 e = vmemdup_array_user(entries, cpuid->nent, sizeof(*e));
478 e = vmemdup_user(entries, array_size(sizeof(*e), cpuid->nent));
473 if (IS_ERR(e))
474 return PTR_ERR(e);
475
476 e2 = kvmalloc_array(cpuid->nent, sizeof(*e2), GFP_KERNEL_ACCOUNT);
477 if (!e2) {
478 r = -ENOMEM;
479 goto out_free_cpuid;
480 }

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508{
509 struct kvm_cpuid_entry2 *e2 = NULL;
510 int r;
511
512 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
513 return -E2BIG;
514
515 if (cpuid->nent) {
479 if (IS_ERR(e))
480 return PTR_ERR(e);
481
482 e2 = kvmalloc_array(cpuid->nent, sizeof(*e2), GFP_KERNEL_ACCOUNT);
483 if (!e2) {
484 r = -ENOMEM;
485 goto out_free_cpuid;
486 }

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514{
515 struct kvm_cpuid_entry2 *e2 = NULL;
516 int r;
517
518 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
519 return -E2BIG;
520
521 if (cpuid->nent) {
516 e2 = vmemdup_array_user(entries, cpuid->nent, sizeof(*e2));
522 e2 = vmemdup_user(entries, array_size(sizeof(*e2), cpuid->nent));
517 if (IS_ERR(e2))
518 return PTR_ERR(e2);
519 }
520
521 r = kvm_set_cpuid(vcpu, e2, cpuid->nent);
522 if (r)
523 kvfree(e2);
524

--- 1053 unchanged lines hidden --- 		523 if (IS_ERR(e2))
524 return PTR_ERR(e2);
525 }
526
527 r = kvm_set_cpuid(vcpu, e2, cpuid->nent);
528 if (r)
529 kvfree(e2);
530

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