Re: PVH boot from net?

[Oliver Rath <oliver@xxxxxxxxxxxx>]

Hi Chris!

Am 02.01.22 um 22:36 schrieb Chris:

Hi

 

it is possible to boot from net (PXE) with PVH mode?

If yes, can you show me e example config?

Im not sure, what you are looking for. Would you

1. Start xen via ipxe and the start a domU client
2. Using ipxe in a pvh environment
   

for 1.: I didnt try this yet, but grub is able to start xen so it should be also possible start xen (with linux as dom0) via ipxe. Then you should be able to start a pvh client from the dom0 linux. The needed device can easily be imported i.e. as iscsi devices, so that xen can offer it.

for 2.: For using ipxe normally a Legacy-Bios or Uefi-Bios is needed. But PVH per default starts the domU-client directly as i.e a binary with ELF-header, so no "pxe" ist possible. But in future (I assume this is work in progress), xen is able to start OVMF as uefi-Bios in PVH-mode so OVMF is able to start i.e. ipxe for network boot. For this an ipxe-aware virtual nic is needed (virtio), where I dont know the status quo. Eventually ipxe is able to use virtio devices and can be built with ELF-header, so it is startable directly in PVH-mode, but I also dont know the status quo. You can make a try and see, what happens :-)

Regards,

Oliver