Merge branch kvm-arm64/nv-6.8-prefix into kvmarm-master/next

Merge branch kvm-arm64/nv-6.8-prefix into kvmarm-master/next

* kvm-arm64/nv-6.8-prefix:
  : .
  : Nested Virtualization support update, focussing on the
  : NV2 support (VNCR mapping and such).
  : .
  KVM: arm64: nv: Handle virtual EL2 registers in vcpu_read/write_sys_reg()
  KVM: arm64: nv: Map VNCR-capable registers to a separate page
  KVM: arm64: nv: Add EL2_REG_VNCR()/EL2_REG_REDIR() sysreg helpers
  KVM: arm64: Introduce a bad_trap() primitive for unexpected trap handling
  KVM: arm64: nv: Add include containing the VNCR_EL2 offsets
  KVM: arm64: nv: Add non-VHE-EL2->EL1 translation helpers
  KVM: arm64: nv: Drop EL12 register traps that are redirected to VNCR
  KVM: arm64: nv: Compute NV view of idregs as a one-off
  KVM: arm64: nv: Hoist vcpu_has_nv() into is_hyp_ctxt()
  arm64: cpufeatures: Restrict NV support to FEAT_NV2

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