To track DTE[GIOV] programming during IOMMU domain attach, also add logic
to determine if the GIOV is required, and set the variable accordinglly.
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
---
drivers/iommu/amd/amd_iommu_types.h | 1 +
drivers/iommu/amd/iommu.c | 10 ++++++++++
2 files changed, 11 insertions(+)
diff --git a/drivers/iommu/amd/amd_iommu_types.h b/drivers/iommu/amd/amd_iommu_types.h
index 2b76b5dedc1d..9be761ba0214 100644
--- a/drivers/iommu/amd/amd_iommu_types.h
+++ b/drivers/iommu/amd/amd_iommu_types.h
@@ -544,6 +544,7 @@ struct gcr3_tbl_info {
int glx; /* Number of levels for GCR3 table */
u32 pasid_cnt; /* Track attached PASIDs */
u16 domid; /* Per device domain ID */
+ bool giov; /* Track DTE[GIOV] */
};
struct amd_io_pgtable {
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 87c5385ce3f2..4667b6c4906f 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -2011,6 +2011,16 @@ static int init_gcr3_table(struct iommu_dev_data *dev_data,
if (ret)
free_gcr3_table(&dev_data->gcr3_info);
+ if (!ret) {
+ /*
+ * GIOV is required for PD_MODE_V2 because we need
+ * to support the case where the end-point device
+ * does not have PASID in the TLP prefix when setting
+ * up to use the v2 table.
+ */
+ dev_data->gcr3_info.giov = true;
+ }
+
return ret;
}
--
2.34.1