The bind_guest_msi() callback checks the domain
is NESTED and redirect to the dma-iommu implementation.
Signed-off-by: Eric Auger <eric.auger@xxxxxxxxxx>
---
drivers/iommu/arm-smmu-v3.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index 4054da756a41..d9d300ab62a5 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -2168,6 +2168,27 @@ static void arm_smmu_put_resv_regions(struct device *dev,
kfree(entry);
}
+static int arm_smmu_bind_guest_msi(struct iommu_domain *domain,
+ struct iommu_guest_msi_binding *binding)
+{
+ struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
+ struct arm_smmu_device *smmu;
+ int ret = -EINVAL;
+
+ mutex_lock(&smmu_domain->init_mutex);
+ smmu = smmu_domain->smmu;
+ if (!smmu)
+ goto out;
+
+ if (smmu_domain->stage != ARM_SMMU_DOMAIN_NESTED)
+ goto out;
+
+ ret = iommu_dma_bind_doorbell(domain, binding);
+out:
+ mutex_unlock(&smmu_domain->init_mutex);
+ return ret;
+}
+
static int arm_smmu_bind_pasid_table(struct iommu_domain *domain,
struct iommu_pasid_table_config *cfg)
{
@@ -2311,6 +2332,7 @@ static struct iommu_ops arm_smmu_ops = {
.bind_pasid_table = arm_smmu_bind_pasid_table,
.unbind_pasid_table = arm_smmu_unbind_pasid_table,
.cache_invalidate = arm_smmu_cache_invalidate,
+ .bind_guest_msi = arm_smmu_bind_guest_msi,
.pgsize_bitmap = -1UL, /* Restricted during device attach */
};
--
2.17.1
