Re: [Xen-users] Panic on CPU 0 : GENERAL PROTECTION FAULT

[Daniel Kiper <daniel.kiper@xxxxxxxxxx>]

On Mon, Apr 25, 2016 at 04:00:08AM -0600, Jan Beulich wrote:
> >>> On 25.04.16 at 11:20, <george.dunlap@xxxxxxxxxx> wrote:
> > On Thu, Apr 21, 2016 at 10:07 PM, Armando Ferreira Lee Eng
> > <lee.eng.a@xxxxxxxxx> wrote:
> >> Hi all,
> >> I'm getting this Panic on CPU 0 : GENERAL PROTECTION FAULT when I'm booting
> >> on Xen 4.4.4 on SLES 11 SP4. If I pass the command "efi=no-rs" seems to
> >> solve the problem but I think this is not the right solution. Can someone
> >> tell me what can be causing this problem? And why with "efi=no-rs" 
> >> magically
> >> all work, I think?
> >
> > Well you seem to be getting the crash in a function called
> > "efi_rs_enter", so I presume "efi=no-rs" causes that funciton not to
> > be called. :-)
> >
> > Jan / Daniel / Konrad,  any ideas?
>
> The (sadly) common case of broken firmware, I suppose. The
> command line option makes sure that broken firmware code doesn't
> get invoked. Details as to what specifically is broken can't (afaict)
> be derived from just the log.
>
> Jan
>
> >> Here is the full log with the Panic:

As Jan said: we are not able to tell you what exactly happened using
just provided log. However, I think that you can do at least three
things to investigate this issue further.

First of all please boot Xen with -mapbs argument, e.g.

xen.efi -mapbs

Do not forget to remove "efi=no-rs" argument from Xen config file.

If it does not work build latest Xen upstream (or at least stable)
version and do same as above.

If it still does not work please boot Linux on this machine.

I hope that helps.

If you have any questions please drop me a line.

Daniel

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