Re: Userspace I/O driver core

["Hans-Jürgen Koch" <hjk@linutronix.de>]

Am Donnerstag, 14. Dezember 2006 10:44 schrieb Avi Kivity:

> 
> I understand one still has to write a kernel driver to shut up the irq.  
> How about writing a small bytecode interpreter to make event than 
> unnecessary?
> 
> The userspace driver would register a couple of bytecode programs: 
> is_interrupt_pending() and disable_interrupt(), which the uio framework 
> would call when the interrupt fires.
> 
> The bytecode could reuse net/core/filter.c, with the packet replaced by 
> the mmio or ioregion, or use something new.
> 

I think this would be overkill. The kernel module you have to write
is _really_ very simple. And it has to be written only once, so even
a manufacturer who employs no experienced kernel developers can
easily outsource that task.

Hans