| Message ID | 20200821002947.263753263@linutronix.de |
|---|---|
| State | New |
| Headers | show |
| Series | x86, PCI, XEN, genirq ...: Prepare for device MSI | expand |
On Fri, Aug 21, 2020 at 02:24:44AM +0200, Thomas Gleixner wrote: > 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> > Cc: Bjorn Helgaas <bhelgaas@google.com> > Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> > Cc: Jonathan Derrick <jonathan.derrick@intel.com> > Cc: linux-pci@vger.kernel.org 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); > + > 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]); >
--- 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); + 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]);
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> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Jonathan Derrick <jonathan.derrick@intel.com> Cc: linux-pci@vger.kernel.org --- drivers/pci/controller/vmd.c | 6 ++++++ 1 file changed, 6 insertions(+)