leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

PCI: OF: Support "external-facing" property

Browse Source 
Set the "untrusted" attribute to any PCIe port that has an
"external-facing" device tree property.  Any device downstream of this port
will inherit the attribute and have only the strictest IOMMU protection.

Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Jean-Philippe Brucker
2019-04-11 13:40:27 +01:00
committed by Bjorn Helgaas
parent badd9f19f1
commit 9cb30a71ac
1 changed files with 10 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/pci/of.c
View File

@@ -31,10 +31,16 @@ void pci_release_of_node(struct pci_dev *dev)
void pci_set_bus_of_node(struct pci_bus *bus) void pci_set_bus_of_node(struct pci_bus *bus)
{ {
if (bus->self == NULL) struct device_node *node;
bus->dev.of_node = pcibios_get_phb_of_node(bus);
else if (bus->self == NULL) {
bus->dev.of_node = of_node_get(bus->self->dev.of_node); node = pcibios_get_phb_of_node(bus);
} else {
node = of_node_get(bus->self->dev.of_node);
if (node && of_property_read_bool(node, "external-facing"))
bus->self->untrusted = true;
}
bus->dev.of_node = node;
} }
void pci_release_bus_of_node(struct pci_bus *bus) void pci_release_bus_of_node(struct pci_bus *bus)