Re: [Qemu-devel] [PATCH 15/35] tcg-s390: Query instruction extensions that are installed.

[Aurelien Jarno <aurelien@aurel32.net>]

On Fri, Jun 11, 2010 at 06:13:49AM -0700, Richard Henderson wrote:
> On 06/11/2010 01:06 AM, Aurelien Jarno wrote:
> >> That said, all the hardware to which either I or agraf have access are the latest
> >> z10 machines.  Frankly I expect that to be true of most if not all machines, since
> >> I think it's just a microcode update which everyone with an active support contract
> >> can get.
> >>
> > 
> > FYI, that's the /proc/cpuinfo of s390 machines I have (more or less)
> > access:
> > 
> > features        : esan3 zarch msa ldisp 
> > features        : esan3 zarch stfle msa ldisp eimm dfp
> > features        : esan3 zarch stfle msa ldisp eimm dfp etf3eh highgprs 
> 
> Interesting that your first one doesn't have stfle.  That one will have to
> go through the SIGILL path.  I would be very interested to have you test 
> that code path.

I have tried, it correctly detects zarch and ldisp.

> Also, what era is that second machine without highgprs?  Is it running an
> old kernel, or a 32-bit kernel?
> 

I have very few infos about it, it's an IBM System z10 machine running a
64-bit 2.6.26 kernel.

-- 
Aurelien Jarno                          GPG: 1024D/F1BCDB73
aurelien@aurel32.net                 http://www.aurel32.net