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iommu/arm-smmu: add devices attached to the SMMU to an IOMMU group

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IOMMU groups are expected by certain users of the IOMMU API,
e.g. VFIO. Add new devices found by the SMMU driver to an IOMMU
group to satisfy those users.

Acked-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Antonios Motakis <a.motakis@virtualopensystems.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Antonios Motakis 2013-10-18 16:08:29 +01:00 committed by Will Deacon
parent 319e2e3f63
commit 5fc63a7c44
1 changed files with 18 additions and 1 deletions
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19
drivers/iommu/arm-smmu.c
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@ -1494,6 +1494,13 @@ static int arm_smmu_add_device(struct device *dev)
{
struct arm_smmu_device *child, *parent, *smmu;
struct arm_smmu_master *master = NULL;
struct iommu_group *group;
int ret;
if (dev->archdata.iommu) {
dev_warn(dev, "IOMMU driver already assigned to device\n");
return -EINVAL;
}
spin_lock(&arm_smmu_devices_lock);
list_for_each_entry(parent, &arm_smmu_devices, list) {
@ -1526,13 +1533,23 @@ static int arm_smmu_add_device(struct device *dev)
if (!master)
return -ENODEV;
group = iommu_group_alloc();
if (IS_ERR(group)) {
dev_err(dev, "Failed to allocate IOMMU group\n");
return PTR_ERR(group);
}
ret = iommu_group_add_device(group, dev);
iommu_group_put(group);
dev->archdata.iommu = smmu;
return 0;
return ret;
}
static void arm_smmu_remove_device(struct device *dev)
{
dev->archdata.iommu = NULL;
iommu_group_remove_device(dev);
}
static struct iommu_ops arm_smmu_ops = {