[PATCH] um: virt-pci: implement pcibios_get_phb_of_node()
From: Vincent Whitchurch <hidden>
Date: 2023-01-20 08:02:55
Also in:
linux-pci, linux-um, lkml
Subsystem:
the rest, user-mode linux (uml) · Maintainers:
Linus Torvalds, Richard Weinberger, Anton Ivanov, Johannes Berg
Implement pcibios_get_phb_of_node() as x86 does in order to allow PCI busses to be associated with devicetree nodes. Signed-off-by: Vincent Whitchurch <redacted> --- arch/um/drivers/virt-pci.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)
diff --git a/arch/um/drivers/virt-pci.c b/arch/um/drivers/virt-pci.c
index 3ac220dafec4..6884e1be38e4 100644
--- a/arch/um/drivers/virt-pci.c
+++ b/arch/um/drivers/virt-pci.c@@ -533,6 +533,25 @@ static void um_pci_irq_vq_cb(struct virtqueue *vq) } } +/* Copied from arch/x86/kernel/devicetree.c */ +struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus) +{ + struct device_node *np; + + for_each_node_by_type(np, "pci") { + const void *prop; + unsigned int bus_min; + + prop = of_get_property(np, "bus-range", NULL); + if (!prop) + continue; + bus_min = be32_to_cpup(prop); + if (bus->number == bus_min) + return np; + } + return NULL; +} + static int um_pci_init_vqs(struct um_pci_device *dev) { struct virtqueue *vqs[2];
--- base-commit: 1b929c02afd37871d5afb9d498426f83432e71c2 change-id: 20230120-uml-pci-of-f21d5ba4b245 Best regards, -- Vincent Whitchurch [off-list ref]