Re: bhyve VMs using netmap passthrough
- In reply to: Jonas Lopes : "bhyve VMs using netmap passthrough"
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Date: Tue, 09 May 2023 07:37:45 UTC
Hi Jonas, Back in 2016 we developed a prototype by patching QEMU-KVM (Linux only) and developed guest OS drivers for both Linux and FreeBSD. (Patches for QEMU-KVM and Linux were not proposed/merged upstream, but that's fine). We then developed a prototype for FreeBSD bhyve+libvmm+vmm ( https://wiki.freebsd.org/SummerOfCode2016/PtnetDriverAndDeviceModel). However, the modifications we did to libvmm+vmm (to map host netmap memory to the guests) were rejected by the maintainers, and the project stopped there. So there are no plans, unless that libvmm+vmm roadblock can be removed. Cheers, Vincenzo Il giorno lun 8 mag 2023 alle ore 19:28 Jonas Lopes <jonasbsd@gmail.com> ha scritto: > Hello everybody, > > Any predictions for ptnet support on bhyve? I tried to use it, but I > realized that we don't have support yet.. > > https://wiki.freebsd.org/SummerOfCode2016/PtnetDriverAndDeviceModel > > I tested this command below: > > # bhyve -c 2 -m 1G -A -H -P \ -s 31,lpc -l com1,stdio \ -s 0:0,hostbridge \ -s 1:0,virtio-net,tap1 \ # virtio-net NIC + TAP backend -s 2:0,virtio-net,vale0:2 \ # virtio-net NIC + netmap userspace backend -s 3:0,ahci-hd,freebsdimg.raw \ -s 4:0,ptnet,vale1:1 \ # ptnet NIC + ptnetmap kernelspace backend -s 5:0,ptnetmap-memdev \ # ptnetmap memory device, needed by the ptnet NIC vm1 > > > But it returns this error: > > *pci slot 0:4:1: unknown device "ptnet"* > > *Motivation*: "A ptnet NIC which does the passthough of an host VALE port > inside the guest. The ptnetmap backend runs in a kernel thread, and it is > implemented as part of the netmap subsystem. > > [image: image.png] > > > *References*: > > - > https://conferences.sigcomm.org/sigcomm/2017/files/tutorial-netmap/02-virtualization.pdf > - https://wiki.freebsd.org/SummerOfCode2016/PtnetDriverAndDeviceModel > > > Best, > > -- > Jonas Lopes >