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-rw-r--r--arch/x86/kernel/amd_iommu.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index ef9b309e8e0..2f7c0b3a448 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -1683,4 +1683,39 @@ static void amd_iommu_detach_device(struct iommu_domain *dom,
iommu_completion_wait(iommu);
}
+static int amd_iommu_attach_device(struct iommu_domain *dom,
+ struct device *dev)
+{
+ struct protection_domain *domain = dom->priv;
+ struct protection_domain *old_domain;
+ struct amd_iommu *iommu;
+ struct pci_dev *pdev;
+ u16 devid;
+
+ if (dev->bus != &pci_bus_type)
+ return -EINVAL;
+
+ pdev = to_pci_dev(dev);
+
+ devid = calc_devid(pdev->bus->number, pdev->devfn);
+
+ if (devid >= amd_iommu_last_bdf ||
+ devid != amd_iommu_alias_table[devid])
+ return -EINVAL;
+
+ iommu = amd_iommu_rlookup_table[devid];
+ if (!iommu)
+ return -EINVAL;
+
+ old_domain = domain_for_device(devid);
+ if (old_domain)
+ return -EBUSY;
+
+ attach_device(iommu, domain, devid);
+
+ iommu_completion_wait(iommu);
+
+ return 0;
+}
+
#endif