[0/2] PCI: Describe external-facing ports in device tree

Message ID	20190318182124.53859-1-jean-philippe.brucker@arm.com
Headers	show Return-Path: <devicetree-owner@vger.kernel.org> From: Jean-Philippe Brucker <jean-philippe.brucker@arm.com> To: bhelgaas@google.com, robh+dt@kernel.org, mark.rutland@arm.com Cc: linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Grant.Likely@arm.com, Jeremy.Linton@arm.com, Robin.Murphy@arm.com Subject: [PATCH 0/2] PCI: Describe external-facing ports in device tree Date: Mon, 18 Mar 2019 18:21:22 +0000 Message-Id: <20190318182124.53859-1-jean-philippe.brucker@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: devicetree-owner@vger.kernel.org Precedence: bulk
Series	PCI: Describe external-facing ports in device tree \| expand [0/2] PCI: Describe external-facing ports in device tree [1/2] dt-bindings: Add external-facing PCIe port property

Message ID

20190318182124.53859-1-jean-philippe.brucker@arm.com

Headers

From: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
To: bhelgaas@google.com, robh+dt@kernel.org, mark.rutland@arm.com
Cc: linux-pci@vger.kernel.org, devicetree@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, Grant.Likely@arm.com,
	Jeremy.Linton@arm.com, Robin.Murphy@arm.com
Subject: [PATCH 0/2] PCI: Describe external-facing ports in device tree
Date: Mon, 18 Mar 2019 18:21:22 +0000
Message-Id: <20190318182124.53859-1-jean-philippe.brucker@arm.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Sender: devicetree-owner@vger.kernel.org
Precedence: bulk

Series

PCI: Describe external-facing ports in device tree | expand

Message

Jean-Philippe Brucker March 18, 2019, 6:21 p.m. UTC

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 [1], for example devices that are plugged in a
thunderbolt port. ACPI systems use the ExternalFacingPort property [2].
Add an equivalent mechanism to device tree.

[1] https://lkml.org/lkml/2018/11/26/631
[2] 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 | 47 +++++++++++++++++++
 drivers/pci/of.c                              |  3 ++
 2 files changed, 50 insertions(+)