Re: Grub xen_pvh platform does not seem to support uncompressed kernels

[Andy Smith]

Hi Jürgen,

On Mon, Nov 02, 2020 at 08:43:24AM +0100, Jürgen Groß wrote:
> On 02.11.20 07:22, Andy Smith wrote:
> >I therefore can only conclude that PVH grub doesn't like kernels
> >with no compression. Is that expected?
> 
> Can you boot the decompressed kernel on bare metal or in an HVM
> domain using grub?

Oh that's interesting. The decompressed kernel doesn't boot bare
metal either (same message).

The decompressed kernel is generated like this:

# extract-vmlinux /boot/vmlinuz-5.4.0-52-generic > 
/boot/vmlinuz-5.4.0-52-generic-decompressed

The decompressed kernel does boot when presented to the hypervisor
directly, i.e. no grub, directly listed in guest config file.

I don't have an HVM test setup right now so am unable to test that,
but I suppose we can assume it will fail as the problem is in the
standard grub loading functions.

So, is this a bug? Grub should be able to boot uncompressed kernels,
shouldn't it?

Thanks,
Andy