From mboxrd@z Thu Jan 1 00:00:00 1970 From: bhelgaas@google.com (Bjorn Helgaas) Date: Thu, 1 Aug 2013 16:26:30 -0600 Subject: [Ksummit-2013-discuss] [ARM ATTEND] Describing complex, non-probable system topologies In-Reply-To: <20130801183531.GB29831@mudshark.cambridge.arm.com> References: <20130801183531.GB29831@mudshark.cambridge.arm.com> Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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