[Cc +Eric Auger] On Tue, 12 Sep 2017 23:31:00 +0530 valmiki <valmikibow@xxxxxxxxx> wrote: > Hi, as per VFIO documentation i see that we need to see > "/sys/bus/pci/devices/0000:06:0d.0/iommu_group" in order to find group > in which PCI bus is attached. > But as per drivers/pci/pci-sysfs.c in static struct attribute > *pci_dev_attrs[], i don't see any such attribute. > I tried enabling SMMUv2 driver and SMMU for PCIe node on our SOC, but > this file doesn't show up and also in /sys/kernel/iommu_group i do not > see "/sys/kernel/iommu_groups/17/devices/0000:00:1f.00" file, i see only > PCIe root port device tree node in that group and not individual buses. > So on ARM64 for showing these paths i.e show specific to each bus, does > SMMU need any particular confguration (we have SMMUv2) ? > Do we need any specific kernel configuration ? > > > Regards, > Valmiki
