In a 1-stage translation setup, a device is attached to a paging domain.
In a 2-stage translation setup, a device is attached to a nested domain,
which does not have the mappings for the MSI page but only an s2_parent
paging domain pointer that holds the mappings.
Add arm_smmu_get_msi_mapping_domain in arm_smmu_nested_ops to return the
correct paging domain.
Signed-off-by: Nicolin Chen <nicol...@nvidia.com>
---
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 10 ++++++++++
1 file changed, 10 insertions(+)
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 24836f3269b3..3962d5a55519 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -3305,10 +3305,20 @@ static int arm_smmu_cache_invalidate_user(struct
iommu_domain *domain,
return ret;
}
+static struct iommu_domain *
+arm_smmu_get_msi_mapping_domain(struct iommu_domain *domain)
+{
+ struct arm_smmu_nested_domain *nested_domain =
+ container_of(domain, struct arm_smmu_nested_domain, domain);
+
+ return &nested_domain->s2_parent->domain;
+}
+
static const struct iommu_domain_ops arm_smmu_nested_ops = {
.attach_dev = arm_smmu_attach_dev_nested,
.free = arm_smmu_domain_nested_free,
.cache_invalidate_user = arm_smmu_cache_invalidate_user,
+ .get_msi_mapping_domain = arm_smmu_get_msi_mapping_domain,
};
static struct iommu_domain *
--
2.43.0
