From mboxrd@z Thu Jan 1 00:00:00 1970 From: will.deacon@arm.com (Will Deacon) Date: Fri, 2 Aug 2013 13:01:15 +0100 Subject: [Ksummit-2013-discuss] [ARM ATTEND] Describing complex, non-probable system topologies In-Reply-To: References: <20130801183531.GB29831@mudshark.cambridge.arm.com> Message-ID: <20130802120115.GO2465@mudshark.cambridge.arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Thu, Aug 01, 2013 at 11:26:30PM +0100, Bjorn Helgaas wrote: > On Thu, Aug 1, 2013 at 12:35 PM, Will Deacon wrote: > > > ... For example, interfacing > > a PCIe device with an SMMU requires knowledge of both the requester id > > associated with the device and how that maps to incoming stream ids > > (based off the AXI bus id) on the SMMU. > > Tangent: We're trying to hash out a way for IOMMU drivers to use a PCI > interface to discover the requester IDs associated with a device. We > currently only have one users (intel-iommu.c), and it would be awesome > to have another user to help make things generic. Please chime in if > you have opinions. > > https://lkml.kernel.org/r/20130711210326.1701.56478.stgit at bling.home Ooh, yes, thanks Bjorn. I'll find some time to take a look at that. Cheers, Will