[RFC v3 13/21] iommu/smmuv3: Implement bind_guest_msi

Eric Auger
2019-01-08T10:26:25Z

The bind_guest_msi() callback checks the domain
is NESTED and redirect to the dma-iommu implementation.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
drivers/iommu/arm-smmu-v3.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)

diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index ca72e0ce92f6..999ee470a2ae 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -2226,6 +2226,28 @@ static void arm_smmu_put_resv_regions(struct device *dev,
kfree(entry);
}

+static int arm_smmu_bind_guest_msi(struct iommu_domain *domain,
+ struct device *dev,
+ 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, dev, binding);
+out:
+ mutex_unlock(&smmu_domain->init_mutex);
+ return ret;
+}
+
static int arm_smmu_set_pasid_table(struct iommu_domain *domain,
struct iommu_pasid_table_config *cfg)
{
@@ -2352,6 +2374,7 @@ static struct iommu_ops arm_smmu_ops = {
.put_resv_regions = arm_smmu_put_resv_regions,
.set_pasid_table = arm_smmu_set_pasid_table,
.cache_invalidate = arm_smmu_cache_invalidate,
+ .bind_guest_msi = arm_smmu_bind_guest_msi,
.pgsize_bitmap = -1UL, /* Restricted during device attach */
};

--
2.17.2