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    Subject[PATCH v12 12/15] iommu/smmuv3: Implement bind/unbind_guest_msi
    Date
    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/arm-smmu-v3/arm-smmu-v3.c | 43 +++++++++++++++++++++
    1 file changed, 43 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 0c5ab4005f76..5aa9e0e747fa 100644
    --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
    +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
    @@ -2738,6 +2738,47 @@ static void arm_smmu_get_resv_regions(struct device *dev,
    iommu_dma_get_resv_regions(dev, head);
    }

    +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 = 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_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 = to_smmu_domain(domain);
    + struct arm_smmu_device *smmu;
    +
    + mutex_lock(&smmu_domain->init_mutex);
    + smmu = smmu_domain->smmu;
    + if (!smmu)
    + goto unlock;
    +
    + if (smmu_domain->stage != 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)
    {
    @@ -2970,6 +3011,8 @@ static struct iommu_ops arm_smmu_ops = {
    .attach_pasid_table = arm_smmu_attach_pasid_table,
    .detach_pasid_table = arm_smmu_detach_pasid_table,
    .cache_invalidate = arm_smmu_cache_invalidate,
    + .bind_guest_msi = arm_smmu_bind_guest_msi,
    + .unbind_guest_msi = arm_smmu_unbind_guest_msi,
    .dev_has_feat = arm_smmu_dev_has_feature,
    .dev_feat_enabled = arm_smmu_dev_feature_enabled,
    .dev_enable_feat = arm_smmu_dev_enable_feature,
    --
    2.21.3
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