Re: [Xen-users] [Xen-devel] Dom0 kernel panic when porting xen to new arm soc

[Julien Grall <julien.grall@xxxxxxxxxx>]

On 25/06/2015 16:09, Peng Fan wrote:
> Hi Julien,
Hi,

> On 6/23/2015 9:56 PM, Peng Fan wrote:
> > Hi,
> >
> > On 6/23/2015 9:36 PM, Julien Grall wrote:
> > > Hi,
> > >
> > > On 23/06/15 14:03, Peng Fan wrote:
> > > > I did not enable LPAE for DOM0 kernel, use shor page table.
> > > > Following is the full log from uboot to kernel with DOM0 512M:
> > > Which CONFIG_VMSPLIT_* do you use? Can you try to use another one? I
> > > remembered it had some effect on the offset between physical and virtual
> > > address.
> >   CONFIG_VMSPLIT_2G=y
> >
> > CONFIG_PAGE_OFFSET=0x80000000
> >
> > ok. Will try 3G:1G split.
> Later I'll reply with log info about this(Do not have log at hand).
> Still panic, maybe something wrong with gnutab configration in my side,
> I use default gnutab address/size.
Did you check that the gnttab doesn't overlap a device/RAM region of 
your hardware?
I've posted a patch a week ago to find automatically a region for the 
grant table [1] in DOM0 memory. It will avoid you to go through the 
datasheet.
> Current I met a DomU boot issue, if do not use blk backend, DomU can
> boot with ramfs as rootfs. If use an image file as rootfs, DomU can not
> boot.
>
> I am not sure why this happends:"
> libxl: error: libxl_create.c:1195:domcreate_launch_dm: unable to add
> disk devices
> libxl: error: libxl_device.c:799:libxl__initiate_device_remove: unable
> to get my domid
> "
> By using gdb, I found domcreate_launch_dm fails to get domid, then it
> reports unable to add disk devices. I am not familiar with xenstore and
> etc. Did I miss some configuation?
The "unable to get my domid" looks like an issue with xenstore. Is 
xenstored running?
Also, did you built you DOM0 kernel with CONFIG_XEN_BLKDEV_BACKEND?

Regards,

[1] http://lists.xen.org/archives/html/xen-devel/2015-06/msg02831.html

--
Julien Grall

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