Since v2 [1] I fixed a possible NULL dereference reported by smatch, sorry about that. I dropped all tags for patch 2. Add an "external-facing" property to PCI ports in device-tree, to help identify untrusted devices. The notion of untrusted PCI devices was added to the v5.0 kernel to describe devices that should have strict IOMMU protection [2], for example devices that are plugged in a Thunderbolt port. ACPI systems use the ExternalFacingPort property [3]. Add an equivalent mechanism to device tree. [1] https://lore.kernel.org/linux-pci/20190402131548.41949-1-jean-philippe.brucker@xxxxxxx/ [2] https://lkml.org/lkml/2018/11/26/631 [3] https://docs.microsoft.com/en-us/windows-hardware/drivers/pci/dsd-for-pcie-root-ports#identifying-externally-exposed-pcie-root-ports Jean-Philippe Brucker (2): dt-bindings: Add external-facing PCIe port property PCI: OF: Support external-facing property Documentation/devicetree/bindings/pci/pci.txt | 50 +++++++++++++++++++ drivers/pci/of.c | 14 ++++-- 2 files changed, 60 insertions(+), 4 deletions(-) -- 2.21.0
