[Fedora-xen] Re: [Xen-devel] Re: Fedora 11 PV Xen domU (2.6.29.4-167.fc11.x86_64) crash with invalid opcode in xsave_cntxt_init (xsetbv)

[Pasi Kärkkäinen]

On Mon, Sep 21, 2009 at 02:10:51PM -0700, Jeremy Fitzhardinge wrote:
> On 09/21/09 13:44, Pasi Kärkkäinen wrote:
> > Thanks for the fast reply. I'll ask him to try "noxsave". 
> >
> > Other than that not much to do about it.. can't really update the F11 GA
> > installer kernel.. (and I don't think doing own custom re-spin of F11 is
> > good solution for him).
> >   
> 
> Oh, its a domU install?  You can mask it in the domain config with the
> oh-so-intuitive cpuid=[] setting (leaf 1, ecx bit 26).  I think that's:
> 
> cpuid=['1:ecx=xxxxx0xxxxxxxxxxxxxxxxxxxxxxxxxx,
>           eax=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx' ]
> 
> (I'm assuming it works for PV as well as HVM domains.)
> 

Hmm.. yeah. Except I think the hypervisor in RHEL5/CentOS5 is too old to
support cpuid masking.. 

Thanks for tip anyway :)

-- Pasi