Re: [Qemu-devel] QEMU API for modelling of user's hardware

Re: [Qemu-devel] QEMU API for modelling of user's hardware

[wzab]

I've tried to collect some information from the QEMU sources (I've built 
my local LXR service with QEMU sources tom make it easier ;-) ), and 
from different web sources.
As a result I've prepared a model of Bus Mastering PCI device which is a 
simple AES256 accelerator.
Sources are available on alt.sources (subject:"WZENC1 - Model of Bus 
Mastering PCI AES256 accelerator for QEM") or
in Google archive: 
http://groups.google.com/group/alt.sources/browse_thread/thread/cc80f25d573813f5
I hope, that it will be useful as didactic aid for implementing of 
device drivers, but may also be a skeleton for model of real hardware...
-- 
Regards,
Wojtek

Re: [Qemu-devel] QEMU API for modelling of user's hardware

[wzab]

I've found the following source of information regarding writing of device
models for QEMU:
http://www.linux-kvm.org/wiki/images/f/fe/2010-forum-armbru-qdev.pdf 
<http://www.google.com/url?sa=D&q=http://www.linux-kvm.org/wiki/images/f/fe/2010-forum-armbru-qdev.pdf> 

Is there any better or more detailed description (except of sources 
themselves ;-) )?
-- 
TIA & Regards,
Wojtek

Re: [Qemu-devel] QEMU API for modelling of user's hardware

[Markus Armbruster]

wzab <wzab@ise.pw.edu.pl> writes:

> I've found the following source of information regarding writing of device
> models for QEMU:
> http://www.linux-kvm.org/wiki/images/f/fe/2010-forum-armbru-qdev.pdf
> <http://www.google.com/url?sa=D&q=http://www.linux-kvm.org/wiki/images/f/fe/2010-forum-armbru-qdev.pdf> 
>
> Is there any better or more detailed description (except of sources
> themselves ;-) )?

I'm not aware of any.  Yes, this sucks.

[Qemu-devel] QEMU API for modelling of user's hardware

[wzab]

Hi,
I wanted to prepare QEMU models of new hardware for my students, to let them to write and debug device drivers before the real hardware is available (or even to optimize the design of this hardware before it is really made).
I was able to establish the basic communication with memory mapped registers of my device, but when it comes to more advanced topics like DMA and interrupts, things start to be difficult.
Is there any reference or manual for people trying to write device models for QEMU? I know that the "hw" subdirectory is full of examples, but I'd prefere something more "formal", with info which solutions are optimal, which are deprecated... 
Thank you very much in advance,
Wojciech Zabolotny