Re: [Xen-users] Load Xen domU (guest) kernel over TFTP

[Julien Grall <julien@xxxxxxx>]

Hello,

On 31/01/2020 09:18, Camden Mannett wrote:
> I have a Xen dom0 instance that has its kernel and DTB loaded over TFTP (via a 
> U-Boot script), and its root FS loaded over NFS. I would like any domU (guest) 
> instances to behave the same, but I'm struggling to find out how to load over 
> TFTP - for example:
>
>      kernel      = "my_kernel"
>      device_tree = "my_dt.dtb"
For what is worth, this option is only necessary if you are going to 
passthrough a device to your guest. This is also a partial device-tree 
to provide information about the device you are about to passthrough. 
The rest of the device-tree is created by the toolstack.
>      name        = "guest1"
>      memory      = 1024
>      vcpus       = 2
>      extra       = "rw nfsroot=192.168.0.1:/guest1,tcp,v3 earlyprintk=xenboot 
> console=hvc0 ip=:::::eth0:dhcp"
>      nfs_root    = "/guest1"
>      nfs_server  = "10.32.209.10"
>      root        = "/dev/nfs"
>      dhcp        = 'dhcp'
>      nics        = 1
>      vif         = [ 'mac=aa:00:00:00:00:01' ]
>      vfb         = [ 'type=vnc,vncdisplay=1' ]
>
> Having the guest kernel and DTB loaded from dom0's filesystem works, but 
> attempting to change the relevant paths to TFTP (xenpvnetboot style):
>
>      kernel      = "tftp://192.168.0/1/my_kernel";
>      device_tree = "tftp://192.168.0.1/my_dt.dtb";
>
> This doesn't work. I can't use xenpvnetboot as it requires a ramdisk image, 
> which I don't use.
Could you expand what you mean by this does not work? From my testing, 
xenpvnetboot does not require a ramdisk.
However, the script will not be able to deal with the device-tree. But I 
am not entirely why you are trying to load a device-tree here given your 
options doesn't show an device passthrough.
> Any ideas how I can load a kernel and DTB into a domU instance over TFTP?
> IMPORTANT NOTICE: The contents of this email and any attachments are 
> confidential and may also be privileged. If you are not the intended recipient, 
> please notify the sender immediately and do not disclose the contents to any 
> other person, use it for any purpose, or store or copy the information in any 
> medium. Thank you.
Please avoid sending e-mail with disclaimer on public mailing list.

Best regards,

--
Julien Grall

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-users