Cross posting to OVDK list. On a side point, Have you looked at the DPDK enabled build in upstream OVS?
> -----Original Message----- > From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of sai kiran > Sent: Wednesday, July 1, 2015 1:02 PM > To: dev at dpdk.org > Subject: [dpdk-dev] OVDK userspace vhost : Issue with > VIRTIO_RING_F_INDIRECT_DESC capability > > Hi, > > I am using OVDK userspace-vhost interfaces for VM-to-external > communication and facing an issue with them. > > I am using the topology mentioned in > https://github.com/01org/dpdk- > ovs/blob/development/docs/04_Sample_Configurations/02_Userspace- > vHost.md > But the Guest is a Freebsd VM and our own custom userspace virtio drivers. > Guest does not have DPDK. > > > 1. I could start OVDK application and vswitchd, and provision a FreeBSD > Guest VM with two userspace-vhost interfaces. > 2. These two userspace-vhost interfaces do not have > VIRTIO_RING_F_INDIRECT_DESC > capability negotiated from backend OVDK-Qemu > 3. Inside the freebsd VM, i have my own userspace drivers running, which > make use of indirect descriptors of virtio. > 4. *Question 1* : By default, without INDIRECT descriptor capability, my > drivers fail to run. Is there any way to increase ring size of > virtio? This can help us avoid using indirect descriptors because of > more space in the ring > 5. *Question 2*: When I try to set the capability from backend QEMU, > guest drivers do not see any packets reaching the guest. Is there > any way to resolve this ?? > > Any help/suggestion would be of great help. > > *Thanks & Regards,* > *Saikiran V*
