Commit 74eeb1a9 authored by Eric Auger's avatar Eric Auger Committed by Zheng Zengkai
Browse files

iommu/smmuv3: Implement bind/unbind_guest_msi 

virt inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I401IF


CVE: NA

------------------------------

The bind/unbind_guest_msi() callbacks check the domain
is NESTED and redirect to the dma-iommu implementation.

Signed-off-by: default avatarEric Auger <eric.auger@redhat.com>
Signed-off-by: default avatarKunkun <Jiang&lt;jiangkunkun@huawei.com>
Reviewed-by: default avatarKeqian Zhu <zhukeqian1@huawei.com>
Signed-off-by: default avatarZheng Zengkai <zhengzengkai@huawei.com>
parent 85412c04

drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c

+43 −0
Original line number Diff line number Diff line
@@ -3374,6 +3374,47 @@ 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)

{
@@ -3775,6 +3816,8 @@ 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,