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Subject[tip: x86/irq] PCI_vmd_Mark_VMD_irqdomain_with_DOMAIN_BUS_VMD_MSI
The following commit has been merged into the x86/irq branch of tip:

Commit-ID: d7f954e54079b4bf6088956d59f43768ec71269a
Gitweb: https://git.kernel.org/tip/d7f954e54079b4bf6088956d59f43768ec71269a
Author: Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Wed, 26 Aug 2020 13:16:52 +02:00
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Wed, 16 Sep 2020 16:52:36 +02:00

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

---
drivers/pci/controller/vmd.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/drivers/pci/controller/vmd.c b/drivers/pci/controller/vmd.c
index 411eed6..aa1b12b 100644
--- 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]);
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