From patchwork Tue Jan 19 19:06:58 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [8/8] virtio-serial: Use MSI vectors for port virtqueues Date: Tue, 19 Jan 2010 09:06:58 -0000 From: Amit Shah X-Patchwork-Id: 43207 Message-Id: <1263928018-32531-9-git-send-email-amit.shah@redhat.com> To: qemu-devel@nongnu.org Cc: Amit Shah This commit enables the use of MSI interrupts for virtqueue notifications for ports. We use nr_ports + 1 (for control channel) msi entries for the ports, as only the in_vq operations need an interrupt on the guest. Signed-off-by: Amit Shah --- hw/virtio-pci.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c index e7fabfb..709d13e 100644 --- a/hw/virtio-pci.c +++ b/hw/virtio-pci.c @@ -499,10 +499,13 @@ static int virtio_serial_init_pci(PCIDevice *pci_dev) if (!vdev) { return -1; } + vdev->nvectors = proxy->nvectors ? proxy->nvectors + : proxy->max_virtserial_ports + 1; virtio_init_pci(proxy, vdev, PCI_VENDOR_ID_REDHAT_QUMRANET, PCI_DEVICE_ID_VIRTIO_CONSOLE, proxy->class_code, 0x00); + proxy->nvectors = vdev->nvectors; return 0; } @@ -581,6 +584,7 @@ static PCIDeviceInfo virtio_info[] = { .init = virtio_serial_init_pci, .exit = virtio_exit_pci, .qdev.props = (Property[]) { + DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 0), DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), DEFINE_PROP_UINT32("max_ports", VirtIOPCIProxy, max_virtserial_ports,