On Fri, Jan 07, 2022 at 09:01:35AM +0100, Laszlo Ersek wrote:
> On 01/05/22 14:56, Richard W.M. Jones wrote:
> > On Wed, Jan 05, 2022 at 01:46:08PM +0100, Tobias Soppa wrote:
> >> Dear Richard,
> >>
> >> Sorry for bothering, but I didn't find another way to ask a question.
> >>
> >> Maybe you can point me to a chat or forum to receive support? I am not
> >> sure whether I should use the libguestfs mailing list to send my
> >> problem it to everyone?
> >
> > You can send any questions to libguestfs@redhat.com (without
> > needing to subscribe).  Or we're on IRC #guestfs on Libera.
> >
> >> For days I'm trying to boot from virt-p2v-make-disk made USB thumbdrive
> >> but was never able to boot from it.
> >>
> >> I did produce several images in different ways and with different Linux
> >> distributions, but the thumb drive is never bootable - not on a
> >> physical machine, nor via Ventoy.
> >>
> >> It works in QEMU though, but I need it running on a physical machine. I
> >> need to use (Secure) UEFI for booting and this works with any other
> >> disk image.
> >
> > Probably UEFI is the problem here - in fact I doubt somehow that
> > we support it at all.
>
> The statement "works in QEMU" is unclear. If the QEMU guest in question
> uses OVMF, then both cases (virt and phys) wouldn't differ with regard
> to firmware type.
>
> Secure Boot could be an issue too, yes; dependent on how the virt-p2v
> UEFI bootloader is signed.
>
> > Is it possible to turn it off and/or use the CMS module?
>
> (*CSM -- compatibility support module)
>
> It could be a workaround, yes.
>
> >
> >> Maybe because these discs are delivered with ISO filesystem and not as
> >> .IMG images? I feel I terribly miss something here.
> >
> > We probably ought to deliver P2V as a UEFI binary, one day.
>
> I've not delved into virt-p2v yet, but given that it uses GTK, it's
> exceedingly unlikely that it can be built as a firmware-level binary
> (such as "grub"), considering either UEFI or traditional BIOS.
>
> The virt-p2v binary is an "ELF 64-bit LSB executable, x86-64, version 1
> (SYSV), dynamically linked (uses shared libs)", so I think what we'd
> actually do is: create a UEFI-bootable Linux image on the USB disk, and
> continue using virt-p2v the same way -- once virt-p2v starts (as a Linux
> process), the host firmware shouldn't matter.

Right, that's what I meant to say :-)

Rich.

> If this is important, we should likely have an RFE (RHBZ) about it.

>
> Thanks!
> Laszlo

--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
libguestfs lets you edit virtual machines.  Supports shell scripting,
bindings from many languages.  http://libguestfs.org

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