[PATCH v4 08/13] iommu/arm-smmu-v3: Add helper for atc invalidation

[Michael Shavit]

This will be used to invalidate ATC entries made on an SSID for a master
when detaching a domain with pasid.

Signed-off-by: Michael Shavit <mshavit at google.com>
---
v1->v2: Make use of arm_smmu_atc_inv_cmd_set_ssid
---
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index 65e2dfd28b7d8..0a5e875abda86 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -1784,13 +1784,15 @@ arm_smmu_atc_inv_to_cmd(unsigned long iova, size_t size,
 	cmd->atc.size	= log2_span;
 }
 
-static int arm_smmu_atc_inv_master(struct arm_smmu_master *master)
+static int arm_smmu_atc_inv_master_ssid(struct arm_smmu_master *master,
+					int ssid)
 {
 	int i;
 	struct arm_smmu_cmdq_ent cmd;
 	struct arm_smmu_cmdq_batch cmds;
 
 	arm_smmu_atc_inv_to_cmd(0, 0, &cmd);
+	arm_smmu_atc_inv_cmd_set_ssid(ssid, &cmd);
 	cmds.num = 0;
 	for (i = 0; i < master->num_streams; i++) {
 		cmd.atc.sid = master->streams[i].id;
@@ -1800,6 +1802,11 @@ static int arm_smmu_atc_inv_master(struct arm_smmu_master *master)
 	return arm_smmu_cmdq_batch_submit(master->smmu, &cmds);
 }
 
+static int arm_smmu_atc_inv_master(struct arm_smmu_master *master)
+{
+	return arm_smmu_atc_inv_master_ssid(master, 0);
+}
+
 /*
  * If ssid is non-zero, issue atc invalidations with the given ssid instead of
  * the one the domain is attached to. This is used by SVA since it's pasid
-- 
2.41.0.162.gfafddb0af9-goog