KVM: Portability: Add two hooks to handle kvm_create and destroy vm

Add two arch hooks to handle kvm_create_vm and kvm destroy_vm. Now, just
put io_bus init and destory in common.

Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/drivers/kvm/x86.c b/drivers/kvm/x86.c
index abb7beeb8f54..b7c72ac36735 100644
--- a/drivers/kvm/x86.c
+++ b/drivers/kvm/x86.c
@@ -2543,3 +2543,50 @@ void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
         kvm_mmu_destroy(vcpu);
         free_page((unsigned long)vcpu->pio_data);
 }
+
+struct  kvm *kvm_arch_create_vm(void)
+{
+        struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
+
+        if (!kvm)
+                return ERR_PTR(-ENOMEM);
+
+        INIT_LIST_HEAD(&kvm->active_mmu_pages);
+
+        return kvm;
+}
+
+static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
+{
+        vcpu_load(vcpu);
+        kvm_mmu_unload(vcpu);
+        vcpu_put(vcpu);
+}
+
+static void kvm_free_vcpus(struct kvm *kvm)
+{
+        unsigned int i;
+
+        /*
+         * Unpin any mmu pages first.
+         */
+        for (i = 0; i < KVM_MAX_VCPUS; ++i)
+                if (kvm->vcpus[i])
+                        kvm_unload_vcpu_mmu(kvm->vcpus[i]);
+        for (i = 0; i < KVM_MAX_VCPUS; ++i) {
+                if (kvm->vcpus[i]) {
+                        kvm_arch_vcpu_free(kvm->vcpus[i]);
+                        kvm->vcpus[i] = NULL;
+                }
+        }
+
+}
+
+void kvm_arch_destroy_vm(struct kvm *kvm)
+{
+        kfree(kvm->vpic);
+        kfree(kvm->vioapic);
+        kvm_free_vcpus(kvm);
+        kvm_free_physmem(kvm);
+        kfree(kvm);
+}