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Re: [qemu-s390x] [PATCH v6 00/16] s390: vfio-ccw dasd ipl support

From: Thomas Huth
Subject: Re: [qemu-s390x] [PATCH v6 00/16] s390: vfio-ccw dasd ipl support
Date: Fri, 5 Apr 2019 08:58:30 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1

On 04/04/2019 16.34, Jason J. Herne wrote:
> This is to support booting from vfio-ccw dasd devices. We basically implement
> the real hardware ipl procedure. This allows for booting Linux guests on
> vfio-ccw devices.
> vfio-ccw's channel program prefetch algorithm complicates ipl because most ipl
> channel programs dynamically modify themselves. Details on the ipl process and
> how we worked around this issue can be found in docs/devel/s390-dasd-ipl.txt.

 Hi Jason,

while running my s390-ccw bios tests, I noticed that network booting
seems to be broken now. This used to work before:

s390x-softmmu/qemu-system-s390x -nographic -accel kvm \
 -bios pc-bios/s390-ccw/s390-ccw.img \
 -global s390-ipl.netboot_fw=pc-bios/s390-ccw/s390-netboot.img \
 -netdev user,id=n1,tftp=/boot,bootfile=vmlinuz-4.18.0 \
 -device virtio-net-ccw,netdev=n1,bootindex=1

Now it simply fails with "! No IPL device available !".

Could you have a look at it, please?


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