Re: [Xen-devel] Error booting Xen

[Dario Faggioli <dario.faggioli@xxxxxxxxxx>]

On Wed, 2016-02-03 at 13:10 +0000, Andrew Cooper wrote:
> On 03/02/16 12:55, Dario Faggioli wrote:
> >Â
> > tbox login: (d1) mapping kernel into physical memory
> > (d1) about to get started...
> > (XEN) traps.c:2684:d1v0 Domain attempted WRMSR 00000000c0000081
> > from 0xe023e00800000000 to 0x0023001000000000.
> > (XEN) traps.c:2684:d1v0 Domain attempted WRMSR 00000000c0000082
> > from 0xffff82d0bfffe080 to 0xffffffff817ef990.
> > (XEN) traps.c:2684:d1v0 Domain attempted WRMSR 00000000c0000083
> > from 0xffff82d0bfffe0a0 to 0xffffffff817f1f60.
> > (XEN) traps.c:2684:d1v0 Domain attempted WRMSR 0000000000000174
> > from 0x000000000000e008 to 0x0000000000000010.
> > (XEN) traps.c:2684:d1v0 Domain attempted WRMSR 0000000000000175
> > from 0xffff83026d40ffc0 to 0x0000000000000000.
> > (XEN) traps.c:2684:d1v0 Domain attempted WRMSR 0000000000000176
> > from 0xffff82d08023eaf0 to 0xffffffff817f1d60.
> > (XEN) traps.c:2684:d1v0 Domain attempted WRMSR 00000000c0000084
> > from 0x0000000000074700 to 0x0000000000047700.
> > (XEN) traps.c:2684:d1v1 Domain attempted WRMSR 00000000c0000081
> > from 0xe023e00800000000 to 0x0023001000000000.
> > (XEN) traps.c:2684:d1v1 Domain attempted WRMSR 00000000c0000082
> > from 0xffff82d0bffff000 to 0xffffffff817ef990.
> > (XEN) traps.c:2684:d1v1 Domain attempted WRMSR 00000000c0000083
> > from 0xffff82d0bffff020 to 0xffffffff817f1f60.
> > (XEN) traps.c:2684:d1v1 Domain attempted WRMSR 0000000000000174
> > from 0x000000000000e008 to 0x0000000000000010.
> > (XEN) traps.c:2684:d1v1 Domain attempted WRMSR 0000000000000175
> > from 0xffff8300866fffc0 to 0x0000000000000000.
> > (XEN) traps.c:2684:d1v1 Domain attempted WRMSR 0000000000000176
> > from 0xffff82d08023eaf0 to 0xffffffff817f1d60.
> > (XEN) traps.c:2684:d1v1 Domain attempted WRMSR 00000000c0000084
> > from 0x0000000000074700 to 0x0000000000047700.
> > 
> > Because this is what you just said above, and that's... well...
> > just
> > impossible?!?! :-O
> 
> This is a Linux PV trying to set up the SYSCALL/SYSENTER MSRs when it
> shouldn't.ÂÂThere is a fix upstream, but this specifically is
> harmless
> noise.
> 
That's ok... What we're arguing is that is happens as a consequence of
a domain being created, not just "by itself, after boot, without
starting any domain" !!!! :-)

Regards,
Dario
-- 
<<This happens because I choose it to happen!>> (Raistlin Majere)
-----------------------------------------------------------------
Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)

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