Re: [Qemu-devel] [Qemu-arm] help on how to emulate rasbperry pi 2

[Andrew Baumann <Andrew.Baumann@microsoft.com>]

> From: Peter Maydell [mailto:peter.maydell@linaro.org]
> Sent: Wednesday, 24 February 2016 9:49 AM
> 
> On 24 February 2016 at 15:40, Mats Malmberg <mats.malmberg@tritech.se>
> wrote:
> >
> > Hello all!
> >
> > TL;DR : Is the raspi2 machine ready to use? If yes, how do I use it with
> > ordinary rpi distros? If not, what is the best way to emulate raspberry
> > pi 2 via Qemu?
> 
> Hi; I've cc'd the main qemu-devel list and Andrew Baumann who contributed
> the rpi2 support. I know there are still some missing pieces to be
> added later but I forget the details.

There are still a number of missing pieces (including display and USB) which I hope to submit soon, but you should be able to boot Linux with a serial console. Brief instructions are at the end of this page: https://github.com/0xabu/qemu/wiki

BTW, instead of -hda you need to pass -sd for the image file.

Cheers,
Andrew

> 
> > Host 'uname -a' output:
> > Linux user-Precision-M4700 3.19.0-49-generic #55~14.04.1-Ubuntu SMP Fri
> Jan 22 11:24:31 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
> >
> > Qemu version (via apt-get) 2.5.50
> >
> >
> >
> > I have been trying lately to get an emulation going with the raspi2 machine.
> I admit that this is my first encounter with trying to use qemu, so perhaps
> some of my attempts have been naive in their approach. Still, I've spent a lot
> of time googling guides, qemu user documentation, blog posts, git
> repositories etc, but with no success. Now I'm all out of ideas...
> >
> > I've tried more ways than suitable to describe here, but in short I typically:
> > 1. take a official linux distro for raspberry pi (alpine, raspbian-jessie, Hypriot
> etc) (all of them verified to work on actual target)
> > 2. find a (what I think is) a compatible kernel, either by copying from
> distro's rootfs boot/ directory or by building a qemu kernel from source
> (https://github.com/dhruvvyas90/qemu-rpi-kernel)
> > 3. try and start the emulation with
> > qemu-system-arm -kernel kernel_file -M raspi2 -hda linux_image_file.img
> >
> > at this point, the terminal says "VNC server running on '127.0.0.1;5900'
> > 4. using vinagre client i connect to the given address, but it only gives me a
> compat_monitor0 console
> >
> > Thus I wonder, is the raspi2 machine a feature that is ready to use?
> > If so, where do I fail in my attempts? If not, what is a recommended
> alternative?
> >
> > Any help or pointers on how to be able to emulate my target (raspberry pi
> 2) would be very appreciated.
> 
> thanks
> -- PMM