Playing with device trees under qemu?

Playing with device trees under qemu?

[Rob Landley]

Google is being unhelpful here.  If I want to:

A) play around with the recent device tree support patches for the kernel

B) boot them under QEMU

Where do I go?  The closest thing to a device trees website google 
finds is http://elinux.org/Device_Trees which doesn't mention qemu at 
all.  There was a CELF proposal last year to add device tree support to 
qemu, which is inexplicably attributed to me:

http://elinux.org/CELF_Project_Proposal/Add_Device_Tree_emulation_support_to_QEMU

And google also found http://www.linux-kvm.org/wiki/images/f/fe/2010-forum-armbru-qdev.pdf
and a kvm (not qemu) status page http://www.linux-kvm.org/page/Qdev_status
but none of them are the "go here, download this, do that" variety...

Any suggestions, or is it not ripe enough to play with yet?

Rob

Re: Playing with device trees under qemu?

[Grant Likely]

On Tue, Mar 29, 2011 at 4:49 AM, Rob Landley <rlandley-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org> wrote:
> Google is being unhelpful here.  If I want to:
>
> A) play around with the recent device tree support patches for the kernel
>
> B) boot them under QEMU
>
> Where do I go?  The closest thing to a device trees website google
> finds is http://elinux.org/Device_Trees which doesn't mention qemu at
> all.  There was a CELF proposal last year to add device tree support to
> qemu, which is inexplicably attributed to me:
>
> http://elinux.org/CELF_Project_Proposal/Add_Device_Tree_emulation_support_to_QEMU
>
> And google also found http://www.linux-kvm.org/wiki/images/f/fe/2010-forum-armbru-qdev.pdf
> and a kvm (not qemu) status page http://www.linux-kvm.org/page/Qdev_status
> but none of them are the "go here, download this, do that" variety...
>
> Any suggestions, or is it not ripe enough to play with yet?

This is a good starting point, if a bit old.  Things have moved on a
bit since then and I should really write up the QEMU configuration
that I'm currently using.

http://people.canonical.com/~jk/dt-workshop/

g.