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qemu/virtio: mark msi vectors used on load

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Usage of msi vectors is controlled by the guest and so needs to be
restored on load. Do this for msi vectors used by the virtio device.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Michael S. Tsirkin 2009-07-05 16:02:34 +03:00 committed by Anthony Liguori
parent 72755a7096
commit e6da768000
1 changed files with 17 additions and 5 deletions
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22
hw/virtio-pci.c
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@ -126,11 +126,18 @@ static int virtio_pci_load_config(void * opaque, QEMUFile *f)
VirtIOPCIProxy *proxy = opaque;
int ret;
ret = pci_device_load(&proxy->pci_dev, f);
if (ret)
if (ret) {
return ret;
}
msix_load(&proxy->pci_dev, f);
if (msix_present(&proxy->pci_dev))
if (msix_present(&proxy->pci_dev)) {
qemu_get_be16s(f, &proxy->vdev->config_vector);
} else {
proxy->vdev->config_vector = VIRTIO_NO_VECTOR;
}
if (proxy->vdev->config_vector != VIRTIO_NO_VECTOR) {
return msix_vector_use(&proxy->pci_dev, proxy->vdev->config_vector);
}
return 0;
}
@ -138,10 +145,15 @@ static int virtio_pci_load_queue(void * opaque, int n, QEMUFile *f)
{
VirtIOPCIProxy *proxy = opaque;
uint16_t vector;
if (!msix_present(&proxy->pci_dev))
return 0;
qemu_get_be16s(f, &vector);
if (msix_present(&proxy->pci_dev)) {
qemu_get_be16s(f, &vector);
} else {
vector = VIRTIO_NO_VECTOR;
}
virtio_queue_set_vector(proxy->vdev, n, vector);
if (vector != VIRTIO_NO_VECTOR) {
return msix_vector_use(&proxy->pci_dev, vector);
}
return 0;
}