Merge branch kvm-arm64/lock-inversion into kvmarm-master/next

* kvm-arm64/lock-inversion:
  : .
  : vm/vcpu lock inversion fixes, courtesy of Oliver Upton, plus a few
  : extra fixes from both Oliver and Reiji Watanabe.
  :
  : From the initial cover letter:
  :
  : As it so happens, lock ordering in KVM/arm64 is completely backwards.
  : There's a significant amount of VM-wide state that needs to be accessed
  : from the context of a vCPU. Until now, this was accomplished by
  : acquiring the kvm->lock, but that cannot be nested within vcpu->mutex.
  :
  : This series fixes the issue with some fine-grained locking for MP state
  : and a new, dedicated mutex that can nest with both kvm->lock and
  : vcpu->mutex.
  : .
  KVM: arm64: Have kvm_psci_vcpu_on() use WRITE_ONCE() to update mp_state
  KVM: arm64: Acquire mp_state_lock in kvm_arch_vcpu_ioctl_vcpu_init()
  KVM: arm64: vgic: Don't acquire its_lock before config_lock
  KVM: arm64: Use config_lock to protect vgic state
  KVM: arm64: Use config_lock to protect data ordered against KVM_RUN
  KVM: arm64: Avoid lock inversion when setting the VM register width
  KVM: arm64: Avoid vcpu->mutex v. kvm->lock inversion in CPU_ON

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