Re: [Xen-devel] LSI SAS2008 Option Rom Failure

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 31.07.12 at 11:04, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
> On Tue, 2012-07-31 at 08:35 +0100, David Erickson wrote:
>> Just got back in town, following up on the prior discussion.  I
>> successfully compiled the latest code (25688 and qemu upstream
>> 5e3bc7144edd6e4fa2824944e5eb16c28197dd5a), but am still having
>> problems during initialization of the card in the guest, in particular
>> the unsupported delivery mode 3 which seems to cause interrupt related
>> problems during init.
> 
> The log has "(XEN) vmsi.c:108:d32767 Unsupported delivery mode 3"
> 
> mode 3 in this context appears to be dest__reserved_1, which corresponds
> to the IOAPIC datasheet I'm looking at[0], which shows that DELMOD=3 is
> reserved.
> 
> The specification update[1] doesn't seem to add anything in this regard.
> 
> So either I've missed another update, we are mis-emulating something
> resulting in an invalid mode or Linux/the LSI ROM are using an
> unspecified IOAPIC mode. Perhaps Jan or Andrew have some idea which it
> is.

At a first glance I would assume this to be the same problem
that was recently fixed for running with qemu-traditional by
Stefano. See 
http://xenbits.xen.org/gitweb/?p=staging/qemu-xen-unstable.git;a=commit;h=ce6d9b1b2f9c6a5ca2500e03d0ef8b453bc4bf53
(and the earlier thread leading there; didn't check whether this
applies to upstream qemu at all). Later he also provided a full
patch, but I don't even see this in our traditional tree, yet -
Ian(J)?

Jan


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