Commit c67d8187 authored by Nicolin Chen's avatar Nicolin Chen Committed by Kunkun Jiang
Browse files

iommu/arm-smmu-v3: Implement arm_smmu_get_msi_mapping_domain 

virt inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/IB4WDJ


CVE: NA

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

In a 1-stage translation setup, a device is attached to a paging domain.
In a 2-stage translation setup, a device is attached to a nested domain,
which does not have the mappings for the MSI page but only an s2_parent
paging domain pointer that holds the mappings.

Add arm_smmu_get_msi_mapping_domain in arm_smmu_nested_ops to return the
correct paging domain.

Signed-off-by: default avatarNicolin Chen <nicolinc@nvidia.com>
Signed-off-by: default avatarKunkun Jiang <jiangkunkun@huawei.com>
parent 622e6259

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

+10 −0
Original line number Diff line number Diff line
@@ -30,6 +30,15 @@ void *arm_smmu_hw_info(struct device *dev, u32 *length, u32 *type) 
	return info;

}



static struct iommu_domain *

arm_smmu_get_msi_mapping_domain(struct iommu_domain *domain)

{

	struct arm_smmu_nested_domain *nested_domain =

		container_of(domain, struct arm_smmu_nested_domain, domain);



	return &nested_domain->vsmmu->s2_parent->domain;

}



static void arm_smmu_make_nested_cd_table_ste(

	struct arm_smmu_ste *target, struct arm_smmu_master *master,

	struct arm_smmu_nested_domain *nested_domain, bool ats_enabled)
@@ -134,6 +143,7 @@ static void arm_smmu_domain_nested_free(struct iommu_domain *domain) 
}



static const struct iommu_domain_ops arm_smmu_nested_ops = {

	.get_msi_mapping_domain	= arm_smmu_get_msi_mapping_domain,

	.attach_dev = arm_smmu_attach_dev_nested,

	.free = arm_smmu_domain_nested_free,

};