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-rw-r--r--hw/virtio/virtio-pci.c131
1 files changed, 58 insertions, 73 deletions
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index 7201cf3dc1..4bdb6e5694 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -677,6 +677,7 @@ static uint32_t virtio_read_config(PCIDevice *pci_dev,
}
static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy,
+ unsigned int queue_no,
unsigned int vector)
{
VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
@@ -739,103 +740,87 @@ static int virtio_pci_get_notifier(VirtIOPCIProxy *proxy, int queue_no,
return 0;
}
-static int kvm_virtio_pci_vector_use_one(VirtIOPCIProxy *proxy, int queue_no)
+static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs)
{
- unsigned int vector;
- int ret;
- EventNotifier *n;
PCIDevice *dev = &proxy->pci_dev;
VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
-
- ret = virtio_pci_get_notifier(proxy, queue_no, &n, &vector);
- if (ret < 0) {
- return ret;
- }
- if (vector >= msix_nr_vectors_allocated(dev)) {
- return 0;
- }
- ret = kvm_virtio_pci_vq_vector_use(proxy, vector);
- if (ret < 0) {
- goto undo;
- }
- /*
- * If guest supports masking, set up irqfd now.
- * Otherwise, delay until unmasked in the frontend.
- */
- if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
- ret = kvm_virtio_pci_irqfd_use(proxy, n, vector);
+ unsigned int vector;
+ int ret, queue_no;
+ EventNotifier *n;
+ for (queue_no = 0; queue_no < nvqs; queue_no++) {
+ if (!virtio_queue_get_num(vdev, queue_no)) {
+ break;
+ }
+ ret = virtio_pci_get_notifier(proxy, queue_no, &n, &vector);
+ if (ret < 0) {
+ break;
+ }
+ if (vector >= msix_nr_vectors_allocated(dev)) {
+ continue;
+ }
+ ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector);
if (ret < 0) {
- kvm_virtio_pci_vq_vector_release(proxy, vector);
goto undo;
}
+ /* If guest supports masking, set up irqfd now.
+ * Otherwise, delay until unmasked in the frontend.
+ */
+ if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
+ ret = kvm_virtio_pci_irqfd_use(proxy, n, vector);
+ if (ret < 0) {
+ kvm_virtio_pci_vq_vector_release(proxy, vector);
+ goto undo;
+ }
+ }
}
-
return 0;
-undo:
- vector = virtio_queue_vector(vdev, queue_no);
- if (vector >= msix_nr_vectors_allocated(dev)) {
- return ret;
- }
- if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
- ret = virtio_pci_get_notifier(proxy, queue_no, &n, &vector);
- if (ret < 0) {
- return ret;
+undo:
+ while (--queue_no >= 0) {
+ vector = virtio_queue_vector(vdev, queue_no);
+ if (vector >= msix_nr_vectors_allocated(dev)) {
+ continue;
}
- kvm_virtio_pci_irqfd_release(proxy, n, vector);
- }
- return ret;
-}
-static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs)
-{
- int queue_no;
- int ret = 0;
- VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
-
- for (queue_no = 0; queue_no < nvqs; queue_no++) {
- if (!virtio_queue_get_num(vdev, queue_no)) {
- return -1;
+ if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
+ ret = virtio_pci_get_notifier(proxy, queue_no, &n, &vector);
+ if (ret < 0) {
+ break;
+ }
+ kvm_virtio_pci_irqfd_release(proxy, n, vector);
}
- ret = kvm_virtio_pci_vector_use_one(proxy, queue_no);
+ kvm_virtio_pci_vq_vector_release(proxy, vector);
}
return ret;
}
-
-static void kvm_virtio_pci_vector_release_one(VirtIOPCIProxy *proxy,
- int queue_no)
+static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs)
{
+ PCIDevice *dev = &proxy->pci_dev;
VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
unsigned int vector;
- EventNotifier *n;
- int ret;
- VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
- PCIDevice *dev = &proxy->pci_dev;
-
- ret = virtio_pci_get_notifier(proxy, queue_no, &n, &vector);
- if (ret < 0) {
- return;
- }
- if (vector >= msix_nr_vectors_allocated(dev)) {
- return;
- }
- if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
- kvm_virtio_pci_irqfd_release(proxy, n, vector);
- }
- kvm_virtio_pci_vq_vector_release(proxy, vector);
-}
-
-static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs)
-{
int queue_no;
- VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
-
+ VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
+ EventNotifier *n;
+ int ret ;
for (queue_no = 0; queue_no < nvqs; queue_no++) {
if (!virtio_queue_get_num(vdev, queue_no)) {
break;
}
- kvm_virtio_pci_vector_release_one(proxy, queue_no);
+ ret = virtio_pci_get_notifier(proxy, queue_no, &n, &vector);
+ if (ret < 0) {
+ break;
+ }
+ if (vector >= msix_nr_vectors_allocated(dev)) {
+ continue;
+ }
+ /* If guest supports masking, clean up irqfd now.
+ * Otherwise, it was cleaned when masked in the frontend.
+ */
+ if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
+ kvm_virtio_pci_irqfd_release(proxy, n, vector);
+ }
+ kvm_virtio_pci_vq_vector_release(proxy, vector);
}
}