Merge branch kvm-arm64/selftest/access-tracking into kvmarm-master/next

* kvm-arm64/selftest/access-tracking:
  : .
  : Small series to add support for arm64 to access_tracking_perf_test and
  : correct a couple bugs along the way.
  :
  : Patches courtesy of Oliver Upton.
  : .
  KVM: selftests: Build access_tracking_perf_test for arm64
  KVM: selftests: Have perf_test_util signal when to stop vCPUs

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