Merge branch kvm-arm64/mte-frac into kvmarm-master/next

* kvm-arm64/mte-frac:
  : .
  : Prevent FEAT_MTE_ASYNC from being accidently exposed to a guest,
  : courtesy of Ben Horgan. From the cover letter:
  :
  : "The ID_AA64PFR1_EL1.MTE_frac field is currently hidden from KVM.
  : However, when ID_AA64PFR1_EL1.MTE==2, ID_AA64PFR1_EL1.MTE_frac==0
  : indicates that MTE_ASYNC is supported. On a host with
  : ID_AA64PFR1_EL1.MTE==2 but without MTE_ASYNC support a guest with the
  : MTE capability enabled will incorrectly see MTE_ASYNC advertised as
  : supported. This series fixes that."
  : .
  KVM: selftests: Confirm exposing MTE_frac does not break migration
  KVM: arm64: Make MTE_frac masking conditional on MTE capability
  arm64/sysreg: Expose MTE_frac so that it is visible to KVM

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