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>

3 files changed, 57 insertions, 36 deletions

diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h
index c4ad66bb5e08..59e001c3ff09 100644
--- a/drivers/kvm/kvm.h
+++ b/drivers/kvm/kvm.h
@@ -674,6 +674,10 @@ int kvm_arch_hardware_setup(void);
 void kvm_arch_hardware_unsetup(void);
 void kvm_arch_check_processor_compat(void *rtn);
 
+void kvm_free_physmem(struct kvm *kvm);
+
+struct  kvm *kvm_arch_create_vm(void);
+void kvm_arch_destroy_vm(struct kvm *kvm);
 
 static inline void kvm_guest_enter(void)
 {
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index e24489b409cf..bde3cf741892 100644
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -156,18 +156,18 @@ EXPORT_SYMBOL_GPL(kvm_vcpu_uninit);
 
 static struct kvm *kvm_create_vm(void)
 {
-        struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
+        struct kvm *kvm = kvm_arch_create_vm();
 
-        if (!kvm)
-                return ERR_PTR(-ENOMEM);
+        if (IS_ERR(kvm))
+                goto out;
 
         kvm_io_bus_init(&kvm->pio_bus);
         mutex_init(&kvm->lock);
-        INIT_LIST_HEAD(&kvm->active_mmu_pages);
         kvm_io_bus_init(&kvm->mmio_bus);
         spin_lock(&kvm_lock);
         list_add(&kvm->vm_list, &vm_list);
         spin_unlock(&kvm_lock);
+out:
         return kvm;
 }
 
@@ -188,7 +188,7 @@ static void kvm_free_physmem_slot(struct kvm_memory_slot *free,
         free->rmap = NULL;
 }
 
-static void kvm_free_physmem(struct kvm *kvm)
+void kvm_free_physmem(struct kvm *kvm)
 {
         int i;
 
@@ -196,32 +196,6 @@ static void kvm_free_physmem(struct kvm *kvm)
                 kvm_free_physmem_slot(&kvm->memslots[i], NULL);
 }
 
-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;
-                }
-        }
-
-}
-
 static void kvm_destroy_vm(struct kvm *kvm)
 {
         spin_lock(&kvm_lock);
@@ -229,11 +203,7 @@ static void kvm_destroy_vm(struct kvm *kvm)
         spin_unlock(&kvm_lock);
         kvm_io_bus_destroy(&kvm->pio_bus);
         kvm_io_bus_destroy(&kvm->mmio_bus);
-        kfree(kvm->vpic);
-        kfree(kvm->vioapic);
-        kvm_free_vcpus(kvm);
-        kvm_free_physmem(kvm);
-        kfree(kvm);
+        kvm_arch_destroy_vm(kvm);
 }
 
 static int kvm_vm_release(struct inode *inode, struct file *filp)
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);
+}