[RESEND PATCH v2 3/6] PCI: Set PCI_BUS_FLAGS_MSI_REMAP if IOMMU have capability of IRQ remapping
From: Yongji Xie <hidden>
Date: 2016-06-02 06:14:33
Also in:
kvm, linux-iommu, linux-pci, lkml
Subsystem:
pci subsystem, the rest · Maintainers:
Bjorn Helgaas, Linus Torvalds
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 <redacted> --- 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