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Re: [Xen-devel] Error booting Xen



On Wed, Feb 03, 2016 at 02:17:26PM +0100, Dario Faggioli wrote:
> On Wed, 2016-02-03 at 13:10 +0000, Andrew Cooper wrote:
> > On 03/02/16 12:55, Dario Faggioli wrote:
> > > 
> > > 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.  There 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" !!!! :-)

It has booted. It says 'about to get started...' which is in the early
code of the Linux pvops.

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