Hi Gerald, thanks for your reply. I have some more questions, please see below.
On Thu, Apr 27, 2017 at 08:10:18PM +0200, Gerald Schaefer wrote: > Well, there is a separate zpci_dev for each pci_dev on s390, > and each of those has its own separate dma-table (thus not shared). Is that true for all functions of a PCIe card, so does every function of a device has its own zpci_dev structure and thus its own DMA-table? My assumption came from the fact that the zpci_dev is read from pci_dev->sysdata, which is propagated there from the pci_bridge through the pci_root_bus structures. > Given this "separate zpci_dev for each pci_dev" situation, I don't > see what this update actually changes, compared to the previous code, > see also my comments to that patch. The add_device call-back is invoked for every function of a pci-device, because each function gets its own pci_dev structure. Also we usually group all functions of a PCI-device together into one iommu-group, because we don't trust that the device isolates its functions from each other. Regards, Joerg _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu