> Is it not possible for Windows (or any OS) to open up DMA for a device
> only to a certain range?
>
> If not, what options are available?
I have various forms of RSI and don't feel like typing it again:
On Thu, Mar 06, 2008 at 12:00:09PM -0800, Tim wrote:
> [...]
> Of course this is not an optimal fix. The drivers should just
> automatically restrict the DMA accesses in real time to a range that is
> safe but still permits devices to use it. (Presumably to buffers
> allocated specifically for I/O.) Not sure if some devices would still
> have problems with this, but I think this is the intended operation of
> ieee1394 based on the specs and I'd imagine it would work on a greater
> number of devices than having it disabled completely.
> [...]
So yes, this is possible. AFAIK, driver writers on all sides have just
been lazy. At least with free OSes they have a lame hack to protect
you.
tim
Received on Mar 07 2008
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