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-rw-r--r--drivers/iommu/amd_iommu.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 341573821864..e9c6233045eb 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2788,6 +2788,18 @@ 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;
+
+ if (!dev_data)
+ return -ENODEV;
+
+ *groupid = amd_iommu_alias_table[dev_data->devid];
+
+ return 0;
+}
+
static struct iommu_ops amd_iommu_ops = {
.domain_init = amd_iommu_domain_init,
.domain_destroy = amd_iommu_domain_destroy,
@@ -2798,6 +2810,7 @@ static struct iommu_ops amd_iommu_ops = {
.iova_to_phys = amd_iommu_iova_to_phys,
.domain_has_cap = amd_iommu_domain_has_cap,
.pgsize_bitmap = AMD_IOMMU_PGSIZES,
+ .device_group = amd_iommu_device_group,
};
/*****************************************************************************