Re: [patch V2 24/46] PCI: vmd: Mark VMD irqdomain with DOMAIN_BUS_VMD_MSI
From: Marc Zyngier <maz@kernel.org>
Date: 2020-08-26 20:47:56
Also in:
linux-iommu, linux-pci, lkml, xen-devel
On Wed, 26 Aug 2020 12:16:52 +0100, Thomas Gleixner [off-list ref] wrote:
quoted hunk ↗ jump to hunk
From: Thomas Gleixner <redacted> 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 <redacted> Acked-by: Bjorn Helgaas <bhelgaas@google.com> --- drivers/pci/controller/vmd.c | 6 ++++++ 1 file changed, 6 insertions(+)--- a/drivers/pci/controller/vmd.c +++ b/drivers/pci/controller/vmd.c@@ -579,6 +579,12 @@ static int vmd_enable_domain(struct vmd_ 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); +
One day, we'll be able to set the token at domain creation time. In the meantime, Acked-by: Marc Zyngier <maz@kernel.org> M. -- Without deviation from the norm, progress is not possible.