Re: [Xen-devel] Unable to boot Xen 4.7-rc4 on HiKey

[Julien Grall <julien.grall@xxxxxxx>]

On 02/06/16 17:53, Tamas K Lengyel wrote:
> On Thu, Jun 2, 2016 at 4:34 PM, Chenxiao Zhao <chenxiao.zhao@xxxxxxxxx> wrote:
> > On 6/1/2016 6:09 PM, Tamas K Lengyel wrote:
> > > On Wed, Jun 1, 2016 at 3:49 PM, Julien Grall <julien.grall@xxxxxxx> wrote:
> > > > On 01/06/2016 18:10, Tamas K Lengyel wrote:
> > > > > Hi all,
> > > >
> > > >
> > > > Hi Tamas,
> > > >
> > > > > following the steps from http://wiki.xen.org/wiki/HiKey I'm unable to
> > > > > get the board to boot Xen. I'm using the Debian reference image from
> > > > > linaro as base
> > > > > (https://builds.96boards.org/releases/hikey/linaro/debian/latest/)
> > > > > and that boots fine both from the SD card directly and through
> > > > > startup.nsh. However, when I try to boot Xen I see only the following:
> > > > >
> > > > > Xen 4.7.0-rc (c/s Mon May 23 12:07:20 2016 +0100 git:8478c94-dirty) EFI
> > > > > loader
> > > > > Using configuration file 'xen.cfg'
> > > > > Image: 0x000000007a121000-0x000000007acb8a70
> > > > >
> > > > > After that no output and dom0 never comes online on the network
> > > > > either. I tried compiling Xen on the device itself in case it was a
> > > > > problem with my cross-compile setup but no difference. Also with and
> > > > > without debug=y. Any tips on what might be going wrong here?
> > > >
> > > >
> > > > I gave a quick look at the upstream device-tree of the hikey, the path
> > > > /smb/uart@f7113000.
> > > >
> > > > If you use the upstream device-tree, it should be able to find the
> > > > correct
> > > > UART via "stdout-path" and therefore dtuart=... should not be necessary.
> > > >
> > > > Let me know if it works for you, and I will update the wiki page.
> > >
> > > No, I removed the dtuart=... part from xen.cfg but there is no
> > > difference in the output and dom0 never comes up on the network
> > > either.
> >
> > Hi Tamas,
> >
> > My xen.cfg for Hikey is like this:
> >
> > options=dom0_mem=1024M dom0_max_vcpus=8 conswitch=x console=dtuart
> > dtuart=/smb/uart@f7113000
> > kernel=Image console=hvc root=/dev/mmcblk0p9 rootwait rw 3
> > dtb=hi6220-hikey.dtb
> >
> > hope this could help you.
> Ah, thank you! Yes, the fact that the dtb goes in a third line in the
> cfg was missing! Should be put on wiki! I finally see Xen booting but
> dom0 still doesn't start.
Well, the firmware should provide a valid device-tree, and therefore 
"dtb=..." should not be necessary.
The way forward is too check why the UEFI firmware does not provide a 
Device Tree (or maybe the DT path to the UART is different).
Regards,

--
Julien Grall

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