Re: [Xen-devel] HVM Driver Domain

["Marek Marczykowski-Górecki" <marmarek@invisiblethingslab.com>]

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On Wed, Jan 22, 2020 at 04:56:15PM +0000, tosher 1 wrote:
> Hi Marek,
> 
> Thanks for your response. The server machine I am using for this setup is an x86_64 Intel Xeon. For the Dom0, I am using Ubuntu 18.04 running on kernel version 5.0.0-37-generic. My Xen version is 4.9.2. 
> 
> For the HVM driver domain, I am using Ubuntu 18.04 running on kernel version 5.0.0-23-generic. I am doing a NIC PCI passthrough to this domain. The Xen config file for this domain looks like the following.
> 
> builder = "hvm"
> name = "ubuntu-doment-hvm"
> memory = "2048"
> pci = [ '01:00.0,permissive=1' ]
> vcpus = 1
> disk = ['phy:/dev/vg/ubuntu-hvm,hda,w']
> vnc = 1
> boot="c"
> 
> I have installed xen-tools of version 4.7 in this driver domain so that the vif-scirpts work. The network configuration here looks like the following where ens5f0 is the interface name for the NIC I did passthrough.
> 
> auto lo
> iface lo inet loopback
> 
> iface ens5f0 inet manual
> 
> auto xenbr1
> iface xenbr1 inet static
>         bridge_ports ens5f0
>         address 192.168.1.3
>         netmask 255.255.255.0
>         gateway 192.168.1.1

Probably irrelevant at this stage, but do you have "xendriverdomain"
service running in the backend?

> The Xen config file content for the DomU is as the following.
> 
> name = "ubuntu_on_ubuntu"
> bootloader = "/usr/lib/xen-4.9/bin/pygrub"
> memory = 1024
> vcpus = 1
> vif = [ 'backend=ubuntu-domnet-hvm,bridge=xenbr1' ]
> disk = [ '/dev/vg/lv_vm_ubuntu_guest,raw,xvda,rw' ]
> 
> When I try to launch this DomU, I get the following error.
> 
> libxl: error: libxl_nic.c:652:libxl__device_nic_set_devids: Domain 31:Unable to set nic defaults for nic 0.

I don't see what is wrong here. Are you sure the backend domain is
running?

> Are these configurations basically very different for what you do for Qubes? Please let me know your thoughts.

Looks similar, although we do that through libvirt.

-- 
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?

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