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

From: Peter Maydell
Subject: Re: [Qemu-arm] help on how to emulate rasbperry pi 2
Date: Wed, 24 Feb 2016 17:48:31 +0000

On 24 February 2016 at 15:40, Mats Malmberg <address@hidden> 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.

> 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 ';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.

-- PMM

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