PCI_vmd_Mark_VMD_irqdomain_with_DOMAIN_BUS_VMD_MSI

Devices on the VMD bus use their own MSI irq domain, but it is not
distinguishable from regular PCI/MSI irq domains. This is required
to exclude VMD devices from getting the irq domain pointer set by
interrupt remapping.

Override the default bus token.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Joerg Roedel <jroedel@suse.de>
Link: https://lore.kernel.org/r/20200826112333.047315047@linutronix.de

diff --git a/drivers/pci/controller/vmd.c b/drivers/pci/controller/vmd.c
index 411eed6..aa1b12b 100644 (file)
--- a/drivers/pci/controller/vmd.c
+++ b/drivers/pci/controller/vmd.c
@@ -580,6 +580,12 @@ static int vmd_enable_domain(struct vmd_dev *vmd, unsigned long features)
                return -ENODEV;
        }
 
+       /*
+        * Override the irq domain bus token so the domain can be distinguished
+        * from a regular PCI/MSI domain.
+        */
+       irq_domain_update_bus_token(vmd->irq_domain, DOMAIN_BUS_VMD_MSI);
+
        pci_add_resource(&resources, &vmd->resources[0]);
        pci_add_resource_offset(&resources, &vmd->resources[1], offset[0]);
        pci_add_resource_offset(&resources, &vmd->resources[2], offset[1]);