Vhost is a kernel-level backend for virtio. This patch add a nic_param
named "vhost" to enable/disable vhost backend.
Changes from v3:
- Added comment explaining that the feature only works with nic_mode =
tap.
- Instead of commenting out the option vhost, leave it uncommented but
with default = no.
Changes from v2:
- Rebase against latest HEAD
Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>
---
client/tests/kvm/kvm_vm.py | 7 +++++--
client/tests/kvm/tests_base.cfg.sample | 6 ++++--
2 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/client/tests/kvm/kvm_vm.py b/client/tests/kvm/kvm_vm.py
index 3388b14..848ff63 100755
--- a/client/tests/kvm/kvm_vm.py
+++ b/client/tests/kvm/kvm_vm.py
@@ -282,9 +282,11 @@ class VM:
def add_net(help, vlan, mode, ifname=None, script=None,
downscript=None, tftp=None, bootfile=None, hostfwd=[],
- netdev_id=None):
+ netdev_id=None, vhost=False):
if has_option(help, "netdev"):
cmd = " -netdev %s,id=%s" % (mode, netdev_id)
+ if vhost:
+ cmd +=",vhost=on"
else:
cmd = " -net %s,vlan=%d" % (mode, vlan)
if mode == "tap":
@@ -448,7 +450,8 @@ class VM:
self.get_ifname(vlan),
script, downscript, tftp,
nic_params.get("bootp"), redirs,
- self.netdev_id[vlan])
+ self.netdev_id[vlan],
+ nic_params.get("vhost")=="yes")
# Proceed to next NIC
vlan += 1
diff --git a/client/tests/kvm/tests_base.cfg.sample b/client/tests/kvm/tests_base.cfg.sample
index 8d62c42..769d750 100644
--- a/client/tests/kvm/tests_base.cfg.sample
+++ b/client/tests/kvm/tests_base.cfg.sample
@@ -699,9 +699,11 @@ variants:
supported_features = "tx rx sg tso gso gro lro"
- virtio_net:
nic_model = virtio
- # you can add advanced attributes on nic_extra_params
- # such as mrg_rxbuf
+ # You can add advanced attributes on nic_extra_params such as mrg_rxbuf
#nic_extra_params =
+ # You can set vhost = yes to enable the vhost kernel backend
+ # (This only works if nic_mode=tap)
+ vhost = no
jumbo:
mtu = 65520
ethtool:
--
1.7.2.3
--
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