Re: [Xen-devel] Pv_ops Dom0 crash on IBM eServer x3400

[Alex Moskalenko <mav@xxxxxxxxx>]

08.06.2012 11:43, Jan Beulich ÐÐÑÐÑ:
> > > > On 07.06.12 at 11:29, Alex Moskalenko<mav@xxxxxxxxx>  wrote:
> > I ran into a trouble when trying to run Xen 4.1.x with pv_ops kernel on
> > IBM eServer x3400. Without noacpi command line option dom0 kernel
> > crashes on ACPI initialization. Kermels 2.6.32 (with konrad xen
> > patches), 3.1, 3.3, Xen 4.1.2 behave the same way. Without hypervisor
> > all kernels run without any problems.
> This is an issue that was reported and discussed previously.
> Fundamentally, it is a firmware problem from my pov: ACPI has
> _nothing_ to do with the MMIO space used for the IO-APICs of
> the system once they are under control of the OS. It shouldn't
> even be reading from them (which iirc was the case in earlier
> reports), but in your case it looks like it's even writing them. I
> had been considering to allow Dom0 read access to those pages,
> but obviously this wouldn't help in your case.
>
> Could you extract and supply the ACPI tables of that system, so
> we can make an attempt at checking whether there is some reason
> for the firmware writing to the IO-APIC that we didn't think of so
> far?
Please see attached archive. Tables are grabbed with acpidump -b under 
Xen 4.1.2 and patched kernel 2.6.32.
--
WBR, Alex Moskalenko

Attachment: acpi_tables.tar.bz2
Description: application/bzip

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