@@ -97,10 +97,13 @@ The -device argument differs in detail for each kind of drive:
* if=virtio
- -device virtio-blk-pci,drive=DRIVE-ID,class=C,vectors=V
+ -device virtio-blk-pci,drive=DRIVE-ID,class=C,vectors=V,ioeventfd=IOEVENTFD
This lets you control PCI device class and MSI-X vectors.
+ IOEVENTFD controls whether or not ioeventfd is used for virtqueue notify. It
+ can be set to on (default) or off.
+
As for all PCI devices, you can add bus=PCI-BUS,addr=DEVFN to
control the PCI device address.
@@ -240,6 +243,9 @@ For PCI devices, you can add bus=PCI-BUS,addr=DEVFN to control the PCI
device address, as usual. The old -net nic provides parameter addr
for that, it is silently ignored when the NIC is not a PCI device.
+For virtio-net-pci, you can control whether or not ioeventfd is used for
+virtqueue notify by setting ioeventfd= to on or off (default).
+
-net nic accepts vectors=V for all models, but it's silently ignored
except for virtio-net-pci (model=virtio). With -device, only devices
that support it accept it.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> --- docs/qdev-device-use.txt | 8 +++++++- 1 files changed, 7 insertions(+), 1 deletions(-)