diff options
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 8 | ||||
| -rw-r--r-- | arch/x86/kvm/x86.c | 21 |
2 files changed, 22 insertions, 7 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index fe4df464fb39..7cdcb3d0f770 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -370,9 +370,13 @@ struct kvm_mem_alias { gfn_t target_gfn; }; -struct kvm_arch{ - int naliases; +struct kvm_mem_aliases { struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS]; + int naliases; +}; + +struct kvm_arch { + struct kvm_mem_aliases *aliases; unsigned int n_free_mmu_pages; unsigned int n_requested_mmu_pages; diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 3b81cb9da8b8..1ce833191430 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -2227,9 +2227,10 @@ gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) { int i; struct kvm_mem_alias *alias; + struct kvm_mem_aliases *aliases = kvm->arch.aliases; - for (i = 0; i < kvm->arch.naliases; ++i) { - alias = &kvm->arch.aliases[i]; + for (i = 0; i < aliases->naliases; ++i) { + alias = &aliases->aliases[i]; if (gfn >= alias->base_gfn && gfn < alias->base_gfn + alias->npages) return alias->target_gfn + gfn - alias->base_gfn; @@ -2247,6 +2248,7 @@ static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm, { int r, n; struct kvm_mem_alias *p; + struct kvm_mem_aliases *aliases; r = -EINVAL; /* General sanity checks */ @@ -2266,15 +2268,17 @@ static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm, down_write(&kvm->slots_lock); spin_lock(&kvm->mmu_lock); - p = &kvm->arch.aliases[alias->slot]; + aliases = kvm->arch.aliases; + + p = &aliases->aliases[alias->slot]; p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT; p->npages = alias->memory_size >> PAGE_SHIFT; p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT; for (n = KVM_ALIAS_SLOTS; n > 0; --n) - if (kvm->arch.aliases[n - 1].npages) + if (aliases->aliases[n - 1].npages) break; - kvm->arch.naliases = n; + aliases->naliases = n; spin_unlock(&kvm->mmu_lock); kvm_mmu_zap_all(kvm); @@ -5158,6 +5162,12 @@ struct kvm *kvm_arch_create_vm(void) if (!kvm) return ERR_PTR(-ENOMEM); + kvm->arch.aliases = kzalloc(sizeof(struct kvm_mem_aliases), GFP_KERNEL); + if (!kvm->arch.aliases) { + kfree(kvm); + return ERR_PTR(-ENOMEM); + } + INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); @@ -5214,6 +5224,7 @@ void kvm_arch_destroy_vm(struct kvm *kvm) put_page(kvm->arch.apic_access_page); if (kvm->arch.ept_identity_pagetable) put_page(kvm->arch.ept_identity_pagetable); + kfree(kvm->arch.aliases); kfree(kvm); } |