Merge branch kvm-arm64/nv-fp-elision into kvmarm-master/next

* kvm-arm64/nv-fp-elision:
  : .
  : Significantly reduce the overhead of the context switch between L1 and
  : L2 guests by eliding the save/restore of the FP/SIMD/SVE registers, as
  : this state is shared between the two guests, and therefore can be left
  : live.
  : .
  KVM: arm64: nv: Don't save/restore FP register during a nested ERET or exception
  KVM: arm64: nv: Track L2 to L1 exception emulation

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