process_vm_writev02 / process_vm_readv02 / process_vm_readv03 failed with X-KVM

These tests have failed with the same error message:
process_vm_writev02.c:176: process_vm_readv: errno=ENOSYS(38): Function not implemented

<<<test_start>>>
tag=process_vm_writev02 stime=1539247288
cmdline="process_vm_writev02"
contacts=""
analysis=exit
<<<test_output>>>
incrementing stop
process_vm_writev02 0 TINFO : child 0: memory allocated.
process_vm_writev02 0 TINFO : child 2: write to the same memory location.
process_vm_writev02 1 TFAIL : process_vm_writev02.c:176: process_vm_readv: errno=ENOSYS(38): Function not implemented
process_vm_writev02 1 TFAIL : process_vm_writev02.c:96: child 1 returns 256
process_vm_writev02 1 TFAIL : process_vm_writev02.c:142: child 0: got 99609 incorrect bytes.
process_vm_writev02 2 TFAIL : process_vm_writev02.c:103: child 0 returns 256
<<<execution_status>>>

<<<test_start>>>
tag=process_vm_readv02 stime=1539246934
cmdline="process_vm_readv02"
contacts=""
analysis=exit
<<<test_output>>>
incrementing stop
process_vm_readv02 0 TINFO : child 0: memory allocated and initialized.
process_vm_readv02 0 TINFO : child 1: reading string from same memory location.
process_vm_readv02 1 TFAIL : process_vm_readv02.c:139: process_vm_readv: errno=ENOSYS(38): Function not implemented
process_vm_readv02 1 TFAIL : process_vm_readv02.c:83: child 1 returns 256
<<<execution_status>>>
initiation_status="ok"
duration=1 termination_type=exited termination_id=1 corefile=no
cutime=0 cstime=0
<<<test_end>>>

<<<test_start>>>
tag=process_vm_readv03 stime=1539247249
cmdline="process_vm_readv03"
contacts=""
analysis=exit
<<<test_output>>>
incrementing stop
process_vm_readv03 0 TINFO : child 0: 10 iovecs allocated and initialized.
process_vm_readv03 1 TFAIL : process_vm_readv03.c:185: process_vm_readv: errno=ENOSYS(38): Function not implemented
process_vm_readv03 1 TFAIL : process_vm_readv03.c:102: child 1 returns 256
<<<execution_status>>>

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-1036-kvm 4.4.0-1036.42
ProcVersionSignature: User Name 4.4.0-1036.42-kvm 4.4.155
Uname: Linux 4.4.0-1036-kvm x86_64
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
Date: Thu Oct 11 08:33:03 2018
SourcePackage: linux-kvm
UpgradeStatus: No upgrade log present (probably fresh install)