Re: [Qemu-devel] [RFC PATCH v2 04/15] cpu-model/s390: Introduce S390 CPU models

Michael Mueller
2015-02-20T17:38:08Z

On Fri, 20 Feb 2015 17:57:52 +0100
Alexander Graf <agraf@suse.de> wrote:

> Because all CPUs we have in our list only expose 128 bits?

Here a STFLE result on a EC12 GA2, already more than 128 bits... Is that model on the list?

[mimu@p57lp59 s390xfac]$ ./s390xfac -b
fac[0] = 0xfbfffffbfcfff840
fac[1] = 0xffde000000000000
fac[2] = 0x1800000000000000
>
> > I want to have this independent from a future machine of the z/Arch. The kernel stores the
> > full facility set, KVM does and there is no good reason for QEMU not to do. If other
> > accelerators decide to just implement 64 or 128 bits of facilities that's ok...
>
> So you want to support CPUs that are not part of the list?

The architecture at least defines more than 2 or 3. Do you want me to limit it to an arbitrary
size?. Only in QEMU or also in the KVM interface?

Thanks
Michael