[PATCH v12 04/11] genirq/msi: Allow MSI doorbell (un)registration

This new API aims at allowing irqchips to allocate & register the MSI doorbells likely to be iommu mapped. Later on, other services will be added allowing the VFIO layer to query information based on all registered doorbells. We count the number of doorbells that do not implement IRQ remapping.

[PATCH v12 04/11] genirq/msi: Allow MSI doorbell (un)registration

This new API aims at allowing irqchips to allocate & register the MSI doorbells likely to be iommu mapped. Later on, other services will be added allowing the VFIO layer to query information based on all registered doorbells. We count the number of doorbells that do not implement IRQ remapping.