Re: [Xen-devel] qemu-3.0 fails with staging

[Paul Durrant <Paul.Durrant@xxxxxxxxxx>]

> -----Original Message-----
> From: Xen-devel [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxxx] On Behalf
> Of Olaf Hering
> Sent: 09 August 2018 10:03
> To: xen-devel@xxxxxxxxxxxxx
> Subject: [Xen-devel] qemu-3.0 fails with staging
> 
> This domU.cfg fails for me with staging+qemu-3.0, but qemu-2.12 happens to
> work:
> 
> name='fv'
> serial='pty'
> vcpus='4'
> memory='8888'
> disk=[ 'vdev=xvda, format=raw, access=rw,
> target=/nfs_vmimages/disk0.raw' ]
> vif=[ 'bridge=br0,mac=3e:27:63:30:c0:46,type=vif' ]
> builder="hvm"
> device_model_version="qemu-xen"
> device_model_override='/usr/lib64/qemu-3.0/bin/qemu-system-i386'
> 
> libxl: error: libxl_dm.c:2429:device_model_spawn_outcome: Domain
> 3:domain 3 device model: spawn failed (rc=-3)
> libxl: error: libxl_create.c:1566:domcreate_devmodel_started: Domain
> 3:device model did not start: -3
> libxl: error: libxl_dm.c:2543:kill_device_model: Device Model already exited
> libxl: error: libxl_domain.c:1034:libxl__destroy_domid: Domain 3:Non-
> existant domain
> libxl: error: libxl_domain.c:993:domain_destroy_callback: Domain 3:Unable to
> destroy guest
> libxl: error: libxl_domain.c:920:domain_destroy_cb: Domain 3:Destruction of
> domain failed
> 
> 
> tail: '/var/log/xen/qemu-dm-fv.log' has been replaced;  following new file
> qemu-system-i386: -serial pty: char device redirected to /dev/pts/5 (label
> serial0)
> xenforeignmemory: error: ioctl failed: Invalid argument
> qemu-system-i386: failed to map ioreq server resources: error 22
> handle=0x561c17027040
> qemu-system-i386: xen hardware virtual machine initialisation failed
> 
> 
> Does it actually work for anyone? I think there is an OSS-TEST for
> qemu.git#master.
> I have to debug something else, so can not actually look further at this 
> point.
> 

That sounds like an issue with direct resource map and privcmd. QEMU should be 
falling back to the old scheme gracefully though. What version of Xen was QEMU 
built against (I'm assuming it is also running on the same version) and what 
dom0 kernel version are you using? I can try to repro.

  Paul

> 
> Olaf

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