Messages in this thread | | | From | Jesse Barnes <> | Subject | Re: [Intel IOMMU 00/10] Intel IOMMU support, take #2 | Date | Tue, 26 Jun 2007 13:10:15 -0700 |
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On Tuesday, June 26, 2007 10:31:57 Andi Kleen wrote: > > >>(and I think it mostly already doesn't even without that) > > > > > >It uses /sys/bus/pci/* which is not any better as seen from the > > > IOMMU. > > > > > >Any interface will need to be explicit because user space needs to > > > know which > > >DMA addresses to put into the hardware. It's not enough to just > > >transparently > > >translate the mappings. > > > > that's what DRM is used for nowadays... > > But DRM does support much less hardware than the X server?
Yeah, the number of DRM drivers is relatively small compared to X or fbdev, but for simple DMA they're fairly easy to write.
> Perhaps we just need an ioctl where an X server can switch this.
Switch what? Turn on or off transparent translation?
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