Comment 4 for bug 1812384

------- Comment From <email address hidden> 2019-01-22 04:31 EDT-------
The attached test case is a minimal kernel generated via the kvm unit test repo.
It has to be executed via qemu kernel boot, the command and expected output in both cases are below.
The path to qemu at the start of the command might need adjustment.

Command:
/usr/local/bin/qemu-system-s390x -nodefaults -nographic -machine s390-ccw-virtio,accel=kvm -chardev stdio,id=con0 -device sclpconsole,chardev=con0 -kernel s390x/diag308.elf

Output on unfixed qemu:
qemu: hardware error: Unhandled diag308 subcode 2
CPU #0:
PSW=mask 0000100180000000 addr 00000000000134be cc 00
R00=0000000000000000 R01=0000000000000000 R02=0000000000000002 R03=0000000000000000
R04=00000000000134ae R05=000000000003fdd8 R06=0000000000000000 R07=0000000000000000
R08=0000000000000000 R09=0000000000000000 R10=0000000000000000 R11=0000000000000000
R12=0000000000000000 R13=0000000000000000 R14=00000000000134ae R15=000000000003fec0
V00=00000000000000000000000000000000 V01=00000000000000000000000000000000
V02=00000000000000000000000000000000 V03=00000000000000000000000000000000
V04=00000000000000000000000000000000 V05=00000000000000000000000000000000
V06=00000000000000000000000000000000 V07=00000000000000000000000000000000
V08=00000000000000000000000000000000 V09=00000000000000000000000000000000
V10=00000000000000000000000000000000 V11=00000000000000000000000000000000
V12=00000000000000000000000000000000 V13=00000000000000000000000000000000
V14=00000000000000000000000000000000 V15=00000000000000000000000000000000
V16=00000000000000000000000000000000 V17=00000000000000000000000000000000
V18=00000000000000000000000000000000 V19=00000000000000000000000000000000
V20=00000000000000000000000000000000 V21=00000000000000000000000000000000
V22=00000000000000000000000000000000 V23=00000000000000000000000000000000
V24=00000000000000000000000000000000 V25=00000000000000000000000000000000
V26=00000000000000000000000000000000 V27=00000000000000000000000000000000
V28=00000000000000000000000000000000 V29=00000000000000000000000000000000
V30=00000000000000000000000000000000 V31=00000000000000000000000000000000
C00=0000000000040000 C01=0000000000000000 C02=0000000000000000 C03=0000000000000000
C04=0000000000000000 C05=0000000000000000 C06=0000000000000000 C07=0000000000000000
C08=0000000000000000 C09=0000000000000000 C10=0000000000000000 C11=0000000000000000
C12=0000000000000000 C13=0000000000000000 C14=00000000c2000000 C15=0000000000000000

QEMU Aborted

Command:
/usr/local/bin/qemu-system-s390x -nodefaults -nographic -machine s390-ccw-virtio,accel=kvm -chardev stdio,id=con0 -device sclpconsole,chardev=con0 -kernel s390x/diag308.elf

Output on fixed qemu:
ABORT: diag308: Unexpected program interrupt: 6 at 0x134be, ilen 4

SUMMARY: 0 tests

EXIT: STATUS=127