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Set virtio-serial device to have a default of 2 MSI vectors.

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The virtio-serial device is expected to use 2 MSI vectors, one for
control queue and a second shared for all queues.

Signed-off-by: Gal Hammer <ghammer@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Gal Hammer 2013-02-27 15:15:31 +02:00 committed by Michael S. Tsirkin
parent 0e98b436ec
commit 554f1997f0
2 changed files with 9 additions and 1 deletions
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5
hw/pc.h
View File

@ -216,6 +216,11 @@ int e820_add_entry(uint64_t, uint64_t, uint32_t);
.driver = "virtio-blk-pci",\
.property = "discard_granularity",\
.value = stringify(0),\
},{\
.driver = "virtio-serial-pci",\
.property = "vectors",\
/* DEV_NVECTORS_UNSPECIFIED as a uint32_t string */\
.value = stringify(0xFFFFFFFF),\
}
#endif

5
hw/virtio-pci.c
View File

@ -975,6 +975,9 @@ static int virtio_serial_init_pci(PCIDevice *pci_dev)
if (!vdev) {
return -1;
}
/* backwards-compatibility with machines that were created with
DEV_NVECTORS_UNSPECIFIED */
vdev->nvectors = proxy->nvectors == DEV_NVECTORS_UNSPECIFIED
? proxy->serial.max_virtserial_ports + 1
: proxy->nvectors;
@ -1155,7 +1158,7 @@ static const TypeInfo virtio_net_info = {
static Property virtio_serial_properties[] = {
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, DEV_NVECTORS_UNSPECIFIED),
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
DEFINE_PROP_UINT32("max_ports", VirtIOPCIProxy, serial.max_virtserial_ports, 31),