[RESEND PATCH v2 4/6] iommu: Set PCI_BUS_FLAGS_MSI_REMAP on iommu driver initialization
From: Yongji Xie <hidden>
Date: 2016-06-02 06:14:43
Also in:
kvm, linux-iommu, linux-pci, lkml
Subsystem:
iommu subsystem, the rest · Maintainers:
Joerg Roedel, Will Deacon, Linus Torvalds
Some iommu drivers would be initialized after PCI device enumeration. So PCI_BUS_FLAGS_MSI_REMAP would not be set when probing PCI devices although IOMMU enables capability of IRQ remapping. This patch tests this capability and set the flag when iommu driver is initialized. Signed-off-by: Yongji Xie <redacted> --- drivers/iommu/iommu.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index b9df141..e6159ab 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c@@ -872,6 +872,14 @@ static int add_iommu_group(struct device *dev, void *data) const struct iommu_ops *ops = cb->ops; int ret; + /* + * Set PCI_BUS_FLAGS_MSI_REMAP for all PCI buses when IOMMU + * have capability of IRQ remapping. + */ + if (dev_is_pci(dev) && ops->capable && + ops->capable(IOMMU_CAP_INTR_REMAP)) + to_pci_dev(dev)->bus->bus_flags |= PCI_BUS_FLAGS_MSI_REMAP; + if (!ops->add_device) return 0;
--
1.7.9.5