Add the prerequisites for DEVICE MSI into the shared select() and child domain init function. These domains are really trivial and just provide a custom irq chip callback to write the MSI message. Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> --- drivers/irqchip/irq-gic-msi-lib.c | 13 +++++++++++++ drivers/irqchip/irq-gic-msi-lib.h | 2 ++ 2 files changed, 15 insertions(+) --- a/drivers/irqchip/irq-gic-msi-lib.c +++ b/drivers/irqchip/irq-gic-msi-lib.c @@ -55,6 +55,19 @@ bool gic_msi_lib_init_dev_msi_info(struc pci_device_msi_mask_unmask_parent_enable(); break; + case DOMAIN_BUS_DEVICE_IMS: + /* + * Per device IMS should never have any MSI feature bits + * set. It's sole purpose is to create a dumb interrupt + * chip which has a device specific irq_write_msi_msg() + * callback. + */ + if (WARN_ON_ONCE(info->flags)) + return false; + + /* Core managed MSI descriptors */ + info->flags = MSI_FLAG_ALLOC_SIMPLE_MSI_DESCS | MSI_FLAG_FREE_MSI_DESCS; + break; default: /* * This should never be reached. See --- a/drivers/irqchip/irq-gic-msi-lib.h +++ b/drivers/irqchip/irq-gic-msi-lib.h @@ -15,6 +15,8 @@ #define MATCH_PCI_MSI (0) #endif +#define MATCH_PLATFORM_MSI BIT(DOMAIN_BUS_PLATFORM_MSI) + int gic_msi_lib_irq_domain_select(struct irq_domain *d, struct irq_fwspec *fwspec, enum irq_domain_bus_token bus_token);
