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Re: [Xen-users] [Xen-devel] XEN/ARM XENFB howto

On Mon, 18 Aug 2014, Suriyan Ramasami wrote:
> Hello,
>    This possibly could be a resend, as I did not see my post (that I
> emailed out on Aug 17).
>    I am looking for documentation on how to use XENFB on ARM. I did
> see a post dated Dec 2013 from Peter
> (http://lists.xen.org/archives/html/xen-users/2013-12/msg00061.html)
> and discussions with Steffano and
> Ian on how to achieve it. But, its not clear to me.
>    I am trying to achieve this on the Odroid-XU (ARM based Exynos
> 5410). I am looking for the following:
> 1. qemu compilation upstream - I believe this has all the bits to
> achieve it. Are there any special compile options. I ask this, as
> qemu-system-arm seems to be spawned in dom0 with -M xenpv and I am not
> able to compile this machine in qemu.
> I do configure to build qemu with --enable-xen --target-list
> arm-softmmu and the other options as mentioned in
> http://wiki.xen.org/wiki/QEMU_Upstream#Building_your_own_qemu.
> Note that I am not trying to cross compile but am compiling qemu natively.

You just need this patch series:


then you should be able to build QEMU normally as part of the Xen build
process. The binary created is actually still called qemu-system-i386
even though we are not actually doing any x86 emulation.

> 2. What are the options in the domU2 config file to achieve this.

The option is called vfb, see man xl.cfg.

> 3. Any thing else ... Like when domU2 is created, what mice/keyboard/fb
> messages to look for, or in dom0 what backend driver output to look
> for. Does this need a xorg.conf file etc ...

dom0. You can try it by simply using fbcon in the guest, see
Documentation/fb/fbcon.txt under Linux.

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