Re: [Qemu-devel] [PATCH RFC] vga: flag vga ram for notifiers

[Michael S. Tsirkin]

On Thu, Mar 31, 2011 at 02:26:59PM -0500, Anthony Liguori wrote:
> On 03/31/2011 02:07 PM, Michael S. Tsirkin wrote:
> >>Just needs some love.
> >>
> >>VGA is just another device.  It happens to be that we treat VGA
> >>device memory as something that behaves like ram occassionally but
> >>that does not make it RAM.
> >If we agree on that, will a pair of functions for this work?
> >How about device_register_ram / device_unregister_ram ?
> 
> To register normal RAM or to register stuff that isn't RAM but looks
> and tastes like RAM?

The later.

> >>Something like vhost doesn't need to see anything but RAM.  If we
> >>have a mechanism to identify RAM as RAM, then vhost can only look at
> >>RAM memory and not worry about things like VGA.
> >>
> >>I thought Alex had gotten a mini-version of RamAPI in but I can't
> >>seem to figure out what that included.
> >Me neither.
> >
> >>  At any rate, the point is
> >>still that registering things that you want to exclude in vhost is
> >>the wrong approach, you want to explicitly mark the things you want
> >>to include.
> >>
> >>Regards,
> >>
> >>Anthony Liguori
> >vhost just wants RAM.
> 
> Right, so mark RAM, and call it a day :-)
> 
> Regards,
> 
> Anthony Liguori
>