Re: [PATCH v2 0/6] KVM: arm64: emulation for CTR_EL0

[Sebastian Ott]

Hi Oliver,

On Wed, 1 May 2024, Oliver Upton wrote:
> On Fri, Apr 26, 2024 at 12:49:44PM +0200, Sebastian Ott wrote:
> > Hej folks,
> >
> > I'm looking into supporting migration between 2 Ampere Altra (Max)
> > machines (using Neoverse-N1). They are almost identical regarding
> > their feature id register state except for CTR_EL0.DIC which is set
> > on one machine but not the other.
> >
> > CTR_EL0 is currently marked as invariant and migrating a VM between
> > those 2 machines using qemu fails.
>
> I left some feedback on the series, but in addition to that would it be
> possible to augment the set_id_regs selftest to exercise the CTR_EL0
> mutability?

Yes, sure!

Thanks,
Sebastian