On Tue, Jun 2, 2015 at 7:55 PM, Stefano Stabellini <
stefano.stabellini@eu.citrix.com> wrote:

> On Tue, 2 Jun 2015, Sanjeev Pandita wrote:
> > From: Stefan Bader [mailto:stefan.bader@canonical.com]
> > Sent: Tuesday, June 02, 2015 1:52 PM
> > To: Sanjeev Pandita; xen-devel@lists.xen.org
> > Cc: Ian.Campbell@citrix.com; Pranavkumar Sawargaonkar;
> > stefano.stabellini@eu.citrix.com
> > Subject: Re: [Xen-devel] ARM64: XEN Domu not booting with the qemu qcow
> > AARCH64 Ubuntu 15.04 disk
> >
> > On 02.06.2015 09:40, Sanjeev Pandita wrote:
> > > All,
> > >
> > > I am pretty new to xen . I am trying to boot DOMU with qemu qcow
> > > AARCH64 Ubuntu 15.04 disk on Xen but I am getting the errors which
> > > link to "/usr/local/lib/xen/bin/qemu-system-i386".
> > > Since I am working on aarch64 system the
> > > /usr/local/lib/xen/bin/qemu-system-i386 bin might not be present or
> > > might not work as expected.
> >
> > Because I am lacking hardware and feedback, the arm64 packaging is a
> > rather theoretical exercise. At least for armhf I thought qemu-system-x86
> > was a dependency. That binary should provide x86 emulation on arm64, the
> > same as one could install qemu for other arches on x86.
> > Have you tried to install qemu-system-x86 manually?
> >
> > -Stefan
> >
> > >
> > > Please let me know how to make the Qemu qcow image work on Xen.
> > > Attached are the DomU boot log and config file.
> > >
> > > Thanks,
> > > San
> >
> > Thanks for your inputs, I have installed the qemu-system-i386 but my DomU
> > booting is still crashing with following short logs. Am I missing
> anything
> > ?
> >
> > Kernel Crash logs:
> >
> > xenbus_probe_frontend: Waiting for devices to initialise:
> > 25s...20s...15s...10s...5s...0s...
> >
> 235s...230s...225s...220s...215s...210s...205s...200s...195s...190s...185s
> >
> ...180s...175s...170s...165s...160s...155s...150s...145s...140s...135s...1
> >
> 30s...125s...120s...115s...110s...105s...100s...95s...90s...85s...80s...75
> >
> s...70s...65s...60s...55s...50s...45s...40s...35s...30s...25s...20s...15s.
> > ..10s...5s...0s...
> >
> > xenbus_probe_frontend: Timeout connecting to device: device/vbd/51712
> > (local state 3, remote state 2)
> > console [netcon0] enabled
> > netconsole: network logging started
> > drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
> > VFS: Cannot open root device "xvda" or unknown-block(0,0): error -6
> > Please append a correct "root=" boot option; here are the available
> > partitions:
> > Kernel panic - not syncing: VFS: Unable to mount root fs on
> > unknown-block(0,0)
> > CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.19.8 #5
> > Hardware name: XENVM-4.6 (DT)
> > Call trace:
> > [<ffffffc00008a0dc>] dump_backtrace+0x0/0x124
> > [<ffffffc00008a210>] show_stack+0x10/0x1c
> > [<ffffffc000657d88>] dump_stack+0x80/0xc4
> > [<ffffffc000656f04>] panic+0xe0/0x220
> > [<ffffffc00087eea8>] mount_block_root+0x1a4/0x24c
> > [<ffffffc00087f19c>] mount_root+0x110/0x130
> > [<ffffffc00087f328>] prepare_namespace+0x16c/0x1b8
> > [<ffffffc00087eb44>] kernel_init_freeable+0x1c4/0x1ec
> > [<ffffffc00065481c>] kernel_init+0xc/0xd8
> > ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on
> > unknown-block(0,0)
>
> It looks like the backend (QEMU) hasn't been initialized properly.
> Could you please post the output of xenstore-ls? Also could you run ps
> aux|grep qemu to check whether QEMU was spawned correctly?
>
>
Attaching output of xenstore-ls and grep qemu.
Looks like qemu process is getting spawned and running fine.

I have also modified the config file to remove tap from disk like:
disk = [ 'qcow:/mnt/xen/vivid-server-cloudimg-arm64-disk1.img,xvda,w' ]
But still my DOMU booting is stuck and getting crashed due to lack of
rootfs/disk.

I am running this on mustang board.

Thanks,
San


>
> >
> > My config file  :
> >
> > linux:/mnt/xen # cat vm1
> > name = "vm1"
> > uuid = "3fb78ba6-8182-484c-acf7-8faba9773f68"
> > disk = [ 'tap:qcow:/mnt/xen/vivid-server-cloudimg-arm64-disk1.img,xvda,w'
> > ]
> > memory = 512
> > kernel = "./Image"
> > extra = "root=/dev/xvda rw console=hvc0 earlyprintk=xen"
>

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