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From:   Eric Auger <eric.auger@redhat.com>
To:     eric.auger.pro@gmail.com, eric.auger@redhat.com,
        iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
        kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, joro@8bytes.org,
        alex.williamson@redhat.com, jacob.jun.pan@linux.intel.com,
        yi.l.liu@intel.com, jean-philippe.brucker@arm.com,
        will.deacon@arm.com, robin.murphy@arm.com
Cc:     marc.zyngier@arm.com, peter.maydell@linaro.org,
        zhangfei.gao@gmail.com
Subject: [PATCH v10 12/13] iommu/smmuv3: Implement bind/unbind_guest_msi
Date:   Fri, 20 Mar 2020 17:09:31 +0100
Message-Id: <20200320160932.27222-13-eric.auger@redhat.com>
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The bind/unbind_guest_msi() callbacks check the domain
is NESTED and redirect to the dma-iommu implementation.

Signed-off-by: Eric Auger <eric.auger@redhat.com>

---

v6 -> v7:
- remove device handle argument
---
 drivers/iommu/arm-smmu-v3.c | 43 +++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index 106f9c563823..c98ee8edf5cf 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -3371,6 +3371,47 @@ static void arm_smmu_get_resv_regions(struct devic=
e *dev,
 	iommu_dma_get_resv_regions(dev, head);
 }
=20
+static int
+arm_smmu_bind_guest_msi(struct iommu_domain *domain,
+			dma_addr_t giova, phys_addr_t gpa, size_t size)
+{
+	struct arm_smmu_domain *smmu_domain =3D to_smmu_domain(domain);
+	struct arm_smmu_device *smmu;
+	int ret =3D -EINVAL;
+
+	mutex_lock(&smmu_domain->init_mutex);
+	smmu =3D smmu_domain->smmu;
+	if (!smmu)
+		goto out;
+
+	if (smmu_domain->stage !=3D ARM_SMMU_DOMAIN_NESTED)
+		goto out;
+
+	ret =3D iommu_dma_bind_guest_msi(domain, giova, gpa, size);
+out:
+	mutex_unlock(&smmu_domain->init_mutex);
+	return ret;
+}
+
+static void
+arm_smmu_unbind_guest_msi(struct iommu_domain *domain, dma_addr_t giova)
+{
+	struct arm_smmu_domain *smmu_domain =3D to_smmu_domain(domain);
+	struct arm_smmu_device *smmu;
+
+	mutex_lock(&smmu_domain->init_mutex);
+	smmu =3D smmu_domain->smmu;
+	if (!smmu)
+		goto unlock;
+
+	if (smmu_domain->stage !=3D ARM_SMMU_DOMAIN_NESTED)
+		goto unlock;
+
+	iommu_dma_unbind_guest_msi(domain, giova);
+unlock:
+	mutex_unlock(&smmu_domain->init_mutex);
+}
+
 static int arm_smmu_attach_pasid_table(struct iommu_domain *domain,
 				       struct iommu_pasid_table_config *cfg)
 {
@@ -3540,6 +3581,8 @@ static struct iommu_ops arm_smmu_ops =3D {
 	.attach_pasid_table	=3D arm_smmu_attach_pasid_table,
 	.detach_pasid_table	=3D arm_smmu_detach_pasid_table,
 	.cache_invalidate	=3D arm_smmu_cache_invalidate,
+	.bind_guest_msi		=3D arm_smmu_bind_guest_msi,
+	.unbind_guest_msi	=3D arm_smmu_unbind_guest_msi,
 	.pgsize_bitmap		=3D -1UL, /* Restricted during device attach */
 };
=20
--=20
2.20.1