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

[Jürgen Groß]

On 02.11.20 09:27, Andy Smith wrote:
> 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?

As long as the boot entry code is included in this kernel, yes.


Juergen