On Fri, Jan 25, 2008 at 09:45:07PM +1100, Michael Ellerman wrote: > Citing "release early release often", I'm posting this now as a mega-patch > to get people looking at it. I'll try to split it up and make it look a > little prettier before submitting it. > > The intent of this patch is to setup (on certain machines) a "static" IOMMU > mapping of all of memory, to reduce the overhead of the IOMMU. If anyone has > a better name than "static" I'm all ears. > > So instead of having an IOMMU window that we use to temporarily map things > in and out of DMA'able space, at boot we create a 1:1 mapping for all of > memory. This obviously only works for devices that can do 64-bit DMA.
I don't get it. Why not disable the iommu instead? -Olof _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
