psci in ubuntu_kvm_unit_tests failed with Disco ARM64

 TESTNAME=psci TIMEOUT=90s ACCEL= ./arm/run arm/psci.flat -smp $MAX_SMP
 FAIL psci (4 tests, 1 unexpected failures)

# MAX_SMP=48
# TESTNAME=psci TIMEOUT=90s ACCEL= ./arm/run arm/psci.flat -smp $MAX_SMP
timeout -k 1s --foreground 90s /usr/bin/qemu-system-aarch64 -nodefaults -machine virt,gic-version=host,accel=kvm -cpu host -device virtio-serial-device -device virtconsole,chardev=ctd -chardev testdev,id=ctd -device pci-testdev -display none -serial stdio -kernel arm/psci.flat -smp 48 # -initrd /tmp/tmp.XqPOvHgIuL
INFO: PSCI version 1.0
PASS: invalid-function
PASS: affinity-info-on
PASS: affinity-info-off
INFO: unexpected cpu_on return value: caller=CPU46, ret=-2
FAIL: cpu-on
SUMMARY: 4 tests, 1 unexpected failures

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: linux-image-5.0.0-13-generic 5.0.0-13.14
ProcVersionSignature: User Name 5.0.0-13.14-generic 5.0.6
Uname: Linux 5.0.0-13-generic aarch64
AlsaDevices:
 total 0
 crw-rw---- 1 root audio 116, 1 May 9 08:43 seq
 crw-rw---- 1 root audio 116, 33 May 9 08:43 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
ApportVersion: 2.20.10-0ubuntu27
Architecture: arm64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CurrentDmesg:

Date: Fri May 10 11:31:36 2019
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
MachineType: Cavium ThunderX CRB
PciMultimedia:

ProcFB:
 0 EFI VGA
 1 astdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.0.0-13-generic root=UUID=d4e5f461-24ef-47d8-a67f-42c82ff1efe8 ro
RelatedPackageVersions:
 linux-restricted-modules-5.0.0-13-generic N/A
 linux-backports-modules-5.0.0-13-generic N/A
 linux-firmware 1.178
RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/12/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 5.11
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: To be filled by O.E.M.
dmi.board.vendor: To be filled by O.E.M.
dmi.board.version: To be filled by O.E.M.
dmi.chassis.asset.tag: To be filled by O.E.M.
dmi.chassis.type: 0
dmi.chassis.vendor: Cavium
dmi.chassis.version: To be filled by O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr5.11:bd12/12/2012:svnCavium:pnThunderXCRB:pvrTobefilledbyO.E.M.:rvnTobefilledbyO.E.M.:rnTobefilledbyO.E.M.:rvrTobefilledbyO.E.M.:cvnCavium:ct0:cvrTobefilledbyO.E.M.:
dmi.product.family: Default string
dmi.product.name: ThunderX CRB
dmi.product.sku: Default string
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: Cavium