diff options
Diffstat (limited to 'drivers/iommu/amd_iommu.c')
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index edd291070b0..cce1f03b889 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -3188,6 +3188,26 @@ static int amd_iommu_domain_has_cap(struct iommu_domain *domain, return 0; } +static int amd_iommu_device_group(struct device *dev, unsigned int *groupid) +{ + struct iommu_dev_data *dev_data = dev->archdata.iommu; + struct pci_dev *pdev = to_pci_dev(dev); + u16 devid; + + if (!dev_data) + return -ENODEV; + + if (pdev->is_virtfn || !iommu_group_mf) + devid = dev_data->devid; + else + devid = calc_devid(pdev->bus->number, + PCI_DEVFN(PCI_SLOT(pdev->devfn), 0)); + + *groupid = amd_iommu_alias_table[devid]; + + return 0; +} + static struct iommu_ops amd_iommu_ops = { .domain_init = amd_iommu_domain_init, .domain_destroy = amd_iommu_domain_destroy, @@ -3197,6 +3217,7 @@ static struct iommu_ops amd_iommu_ops = { .unmap = amd_iommu_unmap, .iova_to_phys = amd_iommu_iova_to_phys, .domain_has_cap = amd_iommu_domain_has_cap, + .device_group = amd_iommu_device_group, .pgsize_bitmap = AMD_IOMMU_PGSIZES, }; |