Hi!

> On Mer, 2004-08-11 at 02:20, Dave Airlie wrote:
>> the VIA/mach64/savage DRM when setup by the current DDXs all allow evil
>> things from my current understanding, that is why they're DDXs haven't
>> got
>> the DRI support turned on by default in Xorg, so those DRMs are not to
>> be
>> built into a release, I think Eric has a good handle on what is and
>> isn't
>> allowed anyways ...
>
> Mach64 isn't entirely secure. Yes we know that the author said so. The
> via one I'm still trying to track down but its entirely A said B said
> C thought D considered it insecure.
>
> I need the original source of the rumour so I can find out if its true
>
>
>
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When I did some cleaning up of the via drm code I noticed that the memory
manager seems identical to the SiS one, so if there is a problem with
that, then there is a problem with the via driver.

Also the unichrome 2d driver allows XvMC dri clients to map (RW) the
framebuffer and the whole register space, and I know that at certain video
register write combinations will lock my machine hard. From my point of
view, however,  this is a deficiency in the unichrome 2d driver rather
than in the via drm driver.

/Thomas



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