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authorAvi Kivity <avi@redhat.com>2009-12-20 15:13:43 +0200
committerMarcelo Tosatti <mtosatti@redhat.com>2010-03-01 12:35:41 -0300
commit980da6ce573b7c40886406674ff8f022a975e65e (patch)
treeb8751c6b766e937ea137d84a48d248b63c2ac02d /virt/kvm/coalesced_mmio.c
parent50eb2a3cd0f50d912b26d0b79b7f443344608390 (diff)
downloadlinaro-lsk-980da6ce573b7c40886406674ff8f022a975e65e.tar.gz
KVM: Simplify coalesced mmio initialization
- add destructor function - move related allocation into constructor - add stubs for !CONFIG_KVM_MMIO Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'virt/kvm/coalesced_mmio.c')
-rw-r--r--virt/kvm/coalesced_mmio.c25
1 files changed, 23 insertions, 2 deletions
diff --git a/virt/kvm/coalesced_mmio.c b/virt/kvm/coalesced_mmio.c
index 04d69cd7049..d68e6c68e0f 100644
--- a/virt/kvm/coalesced_mmio.c
+++ b/virt/kvm/coalesced_mmio.c
@@ -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;
@@ -104,11 +112,24 @@ 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,
struct kvm_coalesced_mmio_zone *zone)
{