From: Changpeng Liu <changpeng....@intel.com> Currently virtio-pci driver hardcoded 2 vectors for virtio-blk device, for multiple I/O queues scenario, all the I/O queues will share one interrupt vector, while here, enable multiple vectors according to the number of I/O queues.
Signed-off-by: Changpeng Liu <changpeng....@intel.com> Reviewed-by: Paolo Bonzini <pbonz...@redhat.com> Reviewed-by: Michael S. Tsirkin <m...@redhat.com> Signed-off-by: Michael S. Tsirkin <m...@redhat.com> --- include/hw/compat.h | 8 ++++++++ hw/virtio/virtio-pci.c | 14 ++++++++++++-- 2 files changed, 20 insertions(+), 2 deletions(-) diff --git a/include/hw/compat.h b/include/hw/compat.h index 7f31850..bc9e3a6 100644 --- a/include/hw/compat.h +++ b/include/hw/compat.h @@ -6,6 +6,14 @@ .driver = "hpet",\ .property = "hpet-offset-saved",\ .value = "false",\ + },{\ + .driver = "virtio-blk-pci",\ + .property = "vectors",\ + .value = "2",\ + },{\ + .driver = "vhost-user-blk-pci",\ + .property = "vectors",\ + .value = "2",\ }, #define HW_COMPAT_2_10 \ diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index c20537f..b55dfcf 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -1932,7 +1932,8 @@ static Property virtio_blk_pci_properties[] = { DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), - DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), + DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, + DEV_NVECTORS_UNSPECIFIED), DEFINE_PROP_END_OF_LIST(), }; @@ -1941,6 +1942,10 @@ static void virtio_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev); DeviceState *vdev = DEVICE(&dev->vdev); + if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { + vpci_dev->nvectors = dev->vdev.conf.num_queues + 1; + } + qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); object_property_set_bool(OBJECT(vdev), true, "realized", errp); } @@ -1983,7 +1988,8 @@ static const TypeInfo virtio_blk_pci_info = { static Property vhost_user_blk_pci_properties[] = { DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), - DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), + DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, + DEV_NVECTORS_UNSPECIFIED), DEFINE_PROP_END_OF_LIST(), }; @@ -1992,6 +1998,10 @@ static void vhost_user_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(vpci_dev); DeviceState *vdev = DEVICE(&dev->vdev); + if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { + vpci_dev->nvectors = dev->vdev.num_queues + 1; + } + qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); object_property_set_bool(OBJECT(vdev), true, "realized", errp); } -- MST