PSCI fixes from Oliver Upton:
- Plug race on reset
- Ensure that a pending reset is applied before userspace accesses
- Reject PSCI requests with illegal affinity bits

* kvm-arm64/psci/cpu_on:
  selftests: KVM: Introduce psci_cpu_on_test
  KVM: arm64: Enforce reserved bits for PSCI target affinities
  KVM: arm64: Handle PSCI resets before userspace touches vCPU state
  KVM: arm64: Fix read-side race on updates to vcpu reset state
Signed-off-by: Marc Zyngier <maz@kernel.org>