Re: [Xen-devel] Unable to add disk on ARM64

[Julien Grall <julien.grall@xxxxxxx>]

On 12/08/2016 14:24, Peng Fan wrote:
> Hi,
Hello Peng,

I have CCed Roger who is more familiar than me with the hotplug scripts.

> I am using xen master branch on i.MX8 ARM64.
>
> My xl configuration:
>
> kernel = "/root/xen/Image"
> memory = "128"
> name = "DomU"
> vcpus = 1
> serial="pty"
> disk = [ 'phy:/dev/loop0,xvda,w' ]
> extra = "console=hvc0 root=/dev/xvda debug=/bin/sh"
>
>
> And I "losetup /dev/loop0 /root/DomU-rootfs" in Dom0 Linux.
>
> But I met the following error:
> libxl: debug: libxl_aoutils.c:593:libxl__async_exec_start: forking to execute: 
> /etc/xen/scripts/block add ^M^M
> Device /dev/loop0 is mounted in the privileged domain,^M^M
> and so cannot be mounted by a guest.^M^M
> libxl: error: libxl_exec.c:118:libxl_report_child_exitstatus: 
> /etc/xen/scripts/block add [800] exited with error status 1^M^M
> libxl: debug: libxl_event.c:686:libxl__ev_xswatch_deregister: watch w=0xfee100: 
> deregister unregistered^M^M
> libxl: error: libxl_devi
> ce.c:1202:device_hotplug_child_death_cb: script: Device /dev/loop0 is mounted 
> in the privileged domain,^M^M
> and so cannot be mounted by a guest.^M^M
From my understanding, you have mounted /dev/loop0 in Dom0, is that 
correct? However, we don't support sharing the same mounting point by 
default (Roger can you confirm).
> libxl: debug: libxl_event.c:686:libxl__ev_xswatch_deregister: watch w=0xfee100: 
> deregister unregistered^M^M
> libxl: error: libxl_create.c:1244:domcreate_launch_dm: unable to add disk 
> devices
>
> Then I change disk to "disk = [ 'format=raw, vdev=xvda, access=rw, 
> target=/root/DomU-rootfs' ]"
> But met other errors:
> "
> /etc/xen/scripts/block failed; error detected.
> "
Regards,

--
Julien Grall

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