The capability of IRQ remapping is abstracted on IOMMU side on some archs. There is a existing flag IOMMU_CAP_INTR_REMAP for this. To have a universal flag to test this capability for different archs on PCI side, we set PCI_BUS_FLAGS_MSI_REMAP for PCI buses when IOMMU_CAP_INTR_REMAP is set. Signed-off-by: Yongji Xie <xyjxie@xxxxxxxxxxxxxxxxxx> --- drivers/pci/probe.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 2b9e3ba..15a33e2 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -16,6 +16,7 @@ #include <linux/aer.h> #include <linux/acpi.h> #include <linux/irqdomain.h> +#include <linux/iommu.h> #include "pci.h" #define CARDBUS_LATENCY_TIMER 176 /* secondary latency timer */ @@ -2160,6 +2161,9 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus, pci_set_bus_of_node(b); pci_set_bus_msi_domain(b); + if (iommu_capable(&pci_bus_type, IOMMU_CAP_INTR_REMAP)) + b->bus_flags |= PCI_BUS_FLAGS_MSI_REMAP; + if (!parent) set_dev_node(b->bridge, pcibus_to_node(b)); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
