[RFC PATCH v2 10/10] iommu/riscv: Add IOTINVAL.GVMA after updating DDT/PDT entries

[fangyu.yu at linux.alibaba.com]

From: Fangyu Yu <fangyu.yu at linux.alibaba.com>

Previously, only IOTINVAL.VMA was issued, which is insufficient for
second-stage address translation consistency.

Signed-off-by: Fangyu Yu <fangyu.yu at linux.alibaba.com>
---
 drivers/iommu/riscv/iommu.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/iommu/riscv/iommu.c b/drivers/iommu/riscv/iommu.c
index b7944149dcfe..44dd268cc3ce 100644
--- a/drivers/iommu/riscv/iommu.c
+++ b/drivers/iommu/riscv/iommu.c
@@ -1065,12 +1065,15 @@ static void riscv_iommu_iodir_iotinval(struct riscv_iommu_device *iommu,
 		/*
 		 * else: IOTINVAL.VMA with GV=1,AV=PSCV=0,and
 		 * GSCID=DC.iohgatp.GSCID
-		 *
+		 */
+		riscv_iommu_cmd_send(iommu, &cmd);
+		/*
 		 * IOTINVAL.GVMA with GV=1,AV=0,and
 		 * GSCID=DC.iohgatp.GSCID
-		 * TODO: For now, the Second-Stage feature have not yet been merged,
-		 * also issue IOTINVAL.GVMA once second-stage support is merged.
 		 */
+		riscv_iommu_cmd_inval_gvma(&cmd);
+		riscv_iommu_cmd_inval_set_gscid(&cmd,
+			FIELD_GET(RISCV_IOMMU_DC_IOHGATP_GSCID, iohgatp));
 	}
 	riscv_iommu_cmd_send(iommu, &cmd);
 }
-- 
2.50.1