[PATCH v5 0/4] KVM: arm64: Errata management for VM Live migration

[Marc Zyngier]

On Tue, 04 Feb 2025 16:45:38 +0000,
Sebastian Ott <sebott at redhat.com> wrote:
> 
> Hey,
> 
> On Fri, 24 Jan 2025, Shameer Kolothum wrote:
> > On ARM64 platforms most of the errata workarounds are based on CPU
> > MIDR/REVIDR values and a number of these workarounds need to be
> > implemented by the Guest kernel as well. This creates a problem when
> > Guest needs to be migrated to a platform that differs in these
> > MIDR/REVIDR values even if the VMM can come up with a common minimum
> > feature list for the Guest using the recently introduced "Writable
> > ID registers" support.
> 
> Currently MIDR/REVIDR are still RO and guest access is not trapped - so
> even with the errata management patches in place the guest state would
> change and a migration (between hosts that differ in these regs) would
> not be possible. Are there any plans to allow to actually change these?

Sure thing. We only need a victim! :)

	M.

-- 
Without deviation from the norm, progress is not possible.