Re: [PATCH 1/7] powerpc: Add interface to get msi region information
From: "joro@8bytes.org" <joro@8bytes.org>
Date: 2013-10-08 17:02:36
Also in:
linux-iommu, linux-pci, lkml
On Tue, Oct 08, 2013 at 10:47:49AM -0600, Bjorn Helgaas wrote:
I still have no idea what an "aperture type IOMMU" is, other than that it is "different."
An aperture based IOMMU is basically any GART-like IOMMU which can only remap a small window (the aperture) of the DMA address space. DMA outside of that window is either blocked completly or passed through untranslated. Joerg