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KVM: Simplify coalesced mmio initialization

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- add destructor function
- move related allocation into constructor
- add stubs for !CONFIG_KVM_MMIO

Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity
2009-12-20 15:13:43 +02:00
committed by Marcelo Tosatti
parent 50eb2a3cd0
commit 980da6ce57
3 changed files with 34 additions and 8 deletions
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virt/kvm/coalesced_mmio.c
+23 -2
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@@ -92,11 +92,19 @@ static const struct kvm_io_device_ops coalesced_mmio_ops = {
int kvm_coalesced_mmio_init(struct kvm *kvm)
{
struct kvm_coalesced_mmio_dev *dev;
struct page *page;
int ret;
ret = -ENOMEM;
page = alloc_page(GFP_KERNEL | __GFP_ZERO);
if (!page)
goto out_err;
kvm->coalesced_mmio_ring = page_address(page);
ret = -ENOMEM;
dev = kzalloc(sizeof(struct kvm_coalesced_mmio_dev), GFP_KERNEL);
if (!dev)
return -ENOMEM;
goto out_free_page;
spin_lock_init(&dev->lock);
kvm_iodevice_init(&dev->dev, &coalesced_mmio_ops);
dev->kvm = kvm;
@@ -104,9 +112,22 @@ int kvm_coalesced_mmio_init(struct kvm *kvm)
ret = kvm_io_bus_register_dev(kvm, &kvm->mmio_bus, &dev->dev);
if (ret < 0)
kfree(dev);
goto out_free_dev;
return ret;
out_free_dev:
kfree(dev);
out_free_page:
__free_page(page);
out_err:
return ret;
}
void kvm_coalesced_mmio_free(struct kvm *kvm)
{
if (kvm->coalesced_mmio_ring)
free_page((unsigned long)kvm->coalesced_mmio_ring);
}
int kvm_vm_ioctl_register_coalesced_mmio(struct kvm *kvm,