Merge branch kvm-arm64/at-fixes-6.16 into kvmarm-master/next

* kvm-arm64/at-fixes-6.16:
  : .
  : Set of fixes for Address Translation (AT) instruction emulation,
  : which affect the (not yet upstream) NV support.
  :
  : From the cover letter:
  :
  : "Here's a small series of fixes for KVM's implementation of address
  : translation (aka the AT S1* instructions), addressing a number of
  : issues in increasing levels of severity:
  :
  : - We misreport PAR_EL1.PTW in a number of occasions, including state
  :   that is not possible as per the architecture definition
  :
  : - We don't handle access faults at all, and that doesn't play very
  :   well with the rest of the VNCR stuff
  :
  : - AT S1E{0,1} from EL2 with HCR_EL2.{E2H,TGE}={1,1} will absolutely
  :   take the host down, no questions asked"
  : .
  KVM: arm64: Don't feed uninitialised data to HCR_EL2
  KVM: arm64: Teach address translation about access faults
  KVM: arm64: Fix PAR_EL1.{PTW,S} reporting on AT S1E*

Signed-off-by: Marc Zyngier <maz@kernel.org>