device: 0.585
performance: 0.573
boot: 0.552
socket: 0.550
PID: 0.481
semantic: 0.399
permissions: 0.346
debug: 0.300
graphic: 0.264
network: 0.245
other: 0.235
files: 0.216
vnc: 0.196
KVM: 0.007

s390x guest hang when ipl boot from a mdev dasd

qemu latest
kernel 5.3.18

I am using a passthrough dasd as boot device, the installment looks fine and gets into reboot process. However VM could not boot and just hang as below after that. I have been checking on "s390: vfio-ccw dasd ipl support" series right now but no clue yet. Could anyone take a look for it? Thanks.



s390vsw188:~ # bash test.sh
LOADPARM=[        ]
executing ccw chain at : 0x0000000000000018
executing ccw chain at : 0x000000000000e000

2020-03-01T06:24:56.879314Z qemu-system-s390x: warning: vfio-ccw (devno fe.0.0000): PFCH flag forced



s390zp12:~ # cat test.sh
/root/qemu/s390x-softmmu/qemu-system-s390x \
-machine s390-ccw-virtio,accel=kvm \
-nographic \
-bios /root/qemu/pc-bios/s390-ccw/s390-ccw.img \
-device vfio-ccw,id=hostdev0,sysfsdev=/sys/bus/mdev/devices/08e8c006-146d-48d3-b21a-c005f9d3a04b,,devno=fe.0.0000,bootindex=1 \
-global vfio-ccw.force-orb-pfch=yes \

s390zp12:~ # cat test.sh
/root/qemu/s390x-softmmu/qemu-system-s390x \
-machine s390-ccw-virtio,accel=kvm \
-nographic \
-bios /root/qemu/pc-bios/s390-ccw/s390-ccw.img \
-device vfio-ccw,id=hostdev0,sysfsdev=/sys/bus/mdev/devices/08e8c006-146d-48d3-b21a-c005f9d3a04b,devno=fe.0.1234,bootindex=1 \
-global vfio-ccw.force-orb-pfch=yes

Can you still reproduce this issue with the latest version of QEMU? Which kind of guest did you install?

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