[Qemu-devel] Re: Write cache enable from guest at runtime

[Christoph Hellwig]

On Mon, Mar 14, 2011 at 07:15:14PM +0000, Stefan Hajnoczi wrote:
> Sounds like a good idea.  Feel free to post the patches RFC and I or
> someone else can debug and polish them if you don't have time.

By looking at your document and doing what you recommend against I think I
got a much simpler solution than what I had before.

I didn't know we could actually write to the config space.  The vpcu
synchronous behaviour is not a problem as it's done seldomly, and we
can trivially check against errors by reading the value back.

I've just started building this variant, and it seems surprisingly simple.