diff mbox series

[v2,13/18] iommu/arm-smmu-v3-sva: Add check when enabling sva

Message ID 20230606120854.4170244-14-mshavit@google.com (mailing list archive)
State New, archived
Headers show
Series Add PASID support to SMMUv3 unmanaged domains | expand

Commit Message

Michael Shavit June 6, 2023, 12:07 p.m. UTC 
SVA domains can only be attached when the master's STEs have a stage 1
domain.

Signed-off-by: Michael Shavit <mshavit@google.com>
---
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox series

Patch

diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
index b615a85e6a54e..e2a91f20f0906 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
@@ -499,9 +499,15 @@  int arm_smmu_master_enable_sva(struct arm_smmu_master *master)
 	int ret;
 
 	mutex_lock(&sva_lock);
+
+	if (!master->s1_cfg) {
+		ret = -EBUSY;
+		goto unlock;
+	}
 	ret = arm_smmu_master_sva_enable_iopf(master);
 	if (!ret)
 		master->sva_enabled = true;
+unlock:
 	mutex_unlock(&sva_lock);
 
 	return ret;