[Qemu-devel] [PATCH 2/2] virtio: enable msi-x for console+balloon

[Gerd Hoffmann <kraxel@redhat.com>]

Enable MSI-X for virtio-console-pci and virtio-balloon-pci.
Add entries to the compatibility machine types so MSI-X will
be disabled for pc-0.10 and pc-0.11.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/pc.c         |   16 ++++++++++++++++
 hw/virtio-pci.c |   11 +++++++++++
 2 files changed, 27 insertions(+), 0 deletions(-)

diff --git a/hw/pc.c b/hw/pc.c
index fdaa52c..cb78923 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -1297,6 +1297,14 @@ static QEMUMachine pc_machine_v0_11 = {
             .driver   = "virtio-blk-pci",
             .property = "vectors",
             .value    = stringify(0),
+        },{
+            .driver   = "virtio-balloon-pci",
+            .property = "vectors",
+            .value    = stringify(0),
+        },{
+            .driver   = "virtio-console-pci",
+            .property = "vectors",
+            .value    = stringify(0),
         },
         { /* end of list */ }
     }
@@ -1324,6 +1332,14 @@ static QEMUMachine pc_machine_v0_10 = {
             .driver   = "virtio-blk-pci",
             .property = "vectors",
             .value    = stringify(0),
+        },{
+            .driver   = "virtio-balloon-pci",
+            .property = "vectors",
+            .value    = stringify(0),
+        },{
+            .driver   = "virtio-console-pci",
+            .property = "vectors",
+            .value    = stringify(0),
         },
         { /* end of list */ }
     },
diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c
index aebcf9d..cb8ab21 100644
--- a/hw/virtio-pci.c
+++ b/hw/virtio-pci.c
@@ -483,10 +483,13 @@ static int virtio_console_init_pci(PCIDevice *pci_dev)
     if (!vdev) {
         return -1;
     }
+    vdev->nvectors = proxy->nvectors;
     virtio_init_pci(proxy, vdev,
                     PCI_VENDOR_ID_REDHAT_QUMRANET,
                     PCI_DEVICE_ID_VIRTIO_CONSOLE,
                     proxy->class_code, 0x00);
+    /* make the actual value visible */
+    proxy->nvectors = vdev->nvectors;
     return 0;
 }
 
@@ -531,11 +534,14 @@ static int virtio_balloon_init_pci(PCIDevice *pci_dev)
     VirtIODevice *vdev;
 
     vdev = virtio_balloon_init(&pci_dev->qdev);
+    vdev->nvectors = proxy->nvectors;
     virtio_init_pci(proxy, vdev,
                     PCI_VENDOR_ID_REDHAT_QUMRANET,
                     PCI_DEVICE_ID_VIRTIO_BALLOON,
                     PCI_CLASS_MEMORY_RAM,
                     0x00);
+    /* make the actual value visible */
+    proxy->nvectors = vdev->nvectors;
     return 0;
 }
 
@@ -569,6 +575,7 @@ static PCIDeviceInfo virtio_info[] = {
         .init      = virtio_console_init_pci,
         .exit      = virtio_exit_pci,
         .qdev.props = (Property[]) {
+            DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
             DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
             DEFINE_PROP_END_OF_LIST(),
         },
@@ -579,6 +586,10 @@ static PCIDeviceInfo virtio_info[] = {
         .init      = virtio_balloon_init_pci,
         .exit      = virtio_exit_pci,
         .qdev.reset = virtio_pci_reset,
+        .qdev.props = (Property[]) {
+            DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
+            DEFINE_PROP_END_OF_LIST(),
+        },
     },{
         /* end of list */
     }
-- 
1.6.2.5