An easier way to check is described here:
http://i-cluster2.inrialpes.fr/doc/misc/fpswa.txt
> -----Original Message-----
> From: Magenheimer, Dan (HP Labs Fort Collins)
> Sent: Wednesday, January 25, 2006 3:23 PM
> To: 'You, Yongkang'; xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
> Subject: RE: [Xen-ia64-devel] 2 LTP math cases failed in xen0
>
> There may be better ways of turning off FPSWA, but
> here's one that should work:
>
> Change linux/arch/ia64/kernel/traps.c:trap_init() so
> that fpswa_interface is always set to 0.
>
> If a native kernel without this change passes the
> two LTP float_* tests but the same native kernel with
> this change fails, it would explain why Xen/ia64 doesn't
> work on the tests... Xen/ia64 doesn't support FPSWA.
>
> > -----Original Message-----
> > From: You, Yongkang [mailto:yongkang.you@xxxxxxxxx]
> > Sent: Sunday, January 22, 2006 6:54 PM
> > To: Magenheimer, Dan (HP Labs Fort Collins);
> > xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
> > Subject: RE: [Xen-ia64-devel] 2 LTP math cases failed in xen0
> >
> > Hi Dan,
> >
> > I am not sure about how to check if those math cases are
> > using FPSWA. I greped the key word in float math cases, but
> > nothing found.
> >
> > 1 information is that these 2 cases (float_exp_log and
> > float_power) can pass in the VTi and IA32 testing. I paste
> > the float codes in the attachment tar ball. Hope it can give
> > some help. If need any information, please let me know.
> >
> > Best Regards,
> > Yongkang (Kangkang) 永康
> >
> > >-----Original Message-----
> > >From: Magenheimer, Dan (HP Labs Fort Collins)
> > >[mailto:dan.magenheimer@xxxxxx]
> > >Sent: 2006年1月21日 1:23
> > >To: You, Yongkang; xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
> > >Subject: RE: [Xen-ia64-devel] 2 LTP math cases failed in xen0
> > >
> > >Hi Yongkang --
> > >
> > >Could you see if the math tests that fail are using
> > >FPSWA (the EFI floating point software assist module)?
> > >I think it is possible to boot Linux with FPSWA disabled.
> > >If this also fails these math tests, it would explain
> > >why Xen/ia64 fails these tests as Xen/ia64 does not
> > >currently support FPSWA (or any EFI modules).
> > >
> > >Thanks,
> > >Dan
> > >
> > >> -----Original Message-----
> > >> From: xen-ia64-devel-bounces@xxxxxxxxxxxxxxxxxxx
> > >> [mailto:xen-ia64-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf
> > >> Of You, Yongkang
> > >> Sent: Friday, January 20, 2006 12:35 AM
> > >> To: xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
> > >> Subject: [Xen-ia64-devel] 2 LTP math cases failed in xen0
> > >>
> > >> Hi all,
> > >>
> > >> I have run a basic LTP testing on Xen0. Except for 1 system
> > >> call case failed has reported, there are 2 math cases failed
> > >> too. But they can pass in the Native Linux of the same
> > >> hardware environment. These two cases are related to float
> > >> calculation.
> > >>
> > >> The testing environment is:
> > >> Xen source is xen-ia64-unstable tree Changeset 8476.
> > >> CPU is Intel Montecito.
> > >> Native and service OS Linux is RHEL4u2.
> > >> The LTP is the one of 2005-12-5.
> > >>
> > >> The attachment is the summary of testing results. This time I
> > >> run these test suites:
> > >> systemcall, memory test, disk io, nptl, math, ipc, pty,
> sched, fs.
> > >>
> > >> I will try to run more testing of LTP and report issues. Hope
> > >> it can help to stable xen0. :)
> > >>
> > >> Best Regards,
> > >> Yongkang (Kangkang) 永康
> > >>
> > >>
> >
>
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