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Commit 844e35bd authored by Will Deacon's avatar Will Deacon
Browse files

iommu/arm-smmu: put iommu_domain pointer in dev->archdata.iommu 



In preparation for nested translation support, stick a pointer to the
iommu_domain in dev->archdata.iommu. This makes it much easier to grab
hold of the physical group configuration (e.g. cbndx) when dealing with
vSMMU accesses from a guest.

Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
parent 8f68f8e2

drivers/iommu/arm-smmu.c

+14 −3
Original line number Diff line number Diff line
@@ -1213,6 +1213,11 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev) 
		return -ENXIO;

	}



	if (dev->archdata.iommu) {

		dev_err(dev, "already attached to IOMMU domain\n");

		return -EEXIST;

	}



	/*

	 * Sanity check the domain. We don't support domains across

	 * different SMMUs.
@@ -1239,7 +1244,10 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev) 
	if (!cfg)

		return -ENODEV;



	return arm_smmu_domain_add_master(smmu_domain, cfg);

	ret = arm_smmu_domain_add_master(smmu_domain, cfg);

	if (!ret)

		dev->archdata.iommu = domain;

	return ret;

}



static void arm_smmu_detach_dev(struct iommu_domain *domain, struct device *dev)
@@ -1248,7 +1256,10 @@ static void arm_smmu_detach_dev(struct iommu_domain *domain, struct device *dev) 
	struct arm_smmu_master_cfg *cfg;



	cfg = find_smmu_master_cfg(dev);

	if (cfg)

	if (!cfg)

		return;



	dev->archdata.iommu = NULL;

	arm_smmu_domain_remove_master(smmu_domain, cfg);

}