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doc: describe --builtin-net-driver option in vhost app

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Very simple version of vhost-user driver in vhost sample will be used if
builtin-net-driver option is enabled. This driver is based on generic
vhost lib APIs. Unfortunately, the implementation is incompatible with
QEMU as protocol feature is not supported.

Signed-off-by: Marvin Liu <yong.liu@intel.com>
Acked-by: John McNamara <john.mcnamara@intel.com>
This commit is contained in:
Marvin Liu 2018-08-01 00:00:39 +08:00 committed by Thomas Monjalon
parent de7ceb7525
commit cc9ecbb48e
1 changed files with 9 additions and 0 deletions
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doc/guides/sample_app_ug/vhost.rst
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@ -158,6 +158,10 @@ when disabling VLAN strip. Such feature, which heavily depends on hardware,
should be removed from this example to reduce confusion. Now, VLAN strip is
enabled and cannot be disabled.
**--builtin-net-driver**
A very simple vhost-user net driver which demonstrates how to use the generic
vhost APIs will be used when this option is given. It is disabled by default.
Common Issues
-------------
@ -192,3 +196,8 @@ Common Issues
according to the NIC's property. ::
make EXTRA_CFLAGS="-DMAX_QUEUES=320"
* Option "builtin-net-driver" is incompatible with QEMU
QEMU vhost net device start will fail if protocol feature is not negotiated.
DPDK virtio-user pmd can be the replacement of QEMU.