> -----Original Message----- > From: [email protected] [mailto:[email protected]] On > Behalf Of Joerg Roedel > Sent: Thursday, September 08, 2011 2:12 PM > To: Greg KH > Cc: Joerg Roedel; [email protected]; Alex Williamson; Ohad > Ben-Cohen; David Woodhouse; David Brown; [email protected]; linux- > [email protected] > Subject: Re: [PATCH 02/10] Driver core: Add iommu_ops to bus_type > > On Wed, Sep 07, 2011 at 12:44:45PM -0700, Greg KH wrote: > > On Wed, Sep 07, 2011 at 09:19:19PM +0200, Joerg Roedel wrote: > > > Hi Greg, > > > > > > the bus_set_iommu() function will be called by the IOMMU driver. > > > There can be different drivers for the same bus, depending on the > > > hardware. On PCI for example, there can be the Intel or the AMD > > > IOMMU driver that implement the iommu-api and that register for that > bus. > > > > Why are you pushing this down into the driver core? What other busses > > becides PCI use/need this? > > Currently it is the platform_bus besides pci. The pci iommus are on x86 > and ia64 while all arm iommus use the platform_bus (by 'iommus' I only > mean those implementing the iommu-api). Currently there are two drivers > for arm iommus in /drivers/iommu. > We too have an IOMMU on Freescale Socs (Power core based) sitting on the platform bus and are looking at integrating it with the linux IOMMU API.
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