[PATCH] KVM: arm64: Add missing ERX*_EL1 registers

[Oliver Upton]

On Wed, Jan 10, 2024 at 12:20:30PM +0000, Marc Zyngier wrote:
> If my reading of the ARM ARM is correct, these registers only exist if
> FEAT_RASv1p1 is implemented. Which means that we shouldn't handle
> those as RAZ/WI unconditionally, but instead check for what we
> advertise to the guest and handle it accordingly.

Can we go a step further and just stop advertising RAS to guests? I don't
expect VMs to gain much from our RAZ/WI implementation. Conditional
RAZ/WI would still be helpful in this case for migrated VMs that have
'seen' the feature.

-- 
Thanks,
Oliver