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iommu: Keep a list of allocated groups in __iommu_probe_device()

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This is needed to defer default_domain allocation for new IOMMU groups
until all devices have been added to the group.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/20200429133712.31431-10-joro@8bytes.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel 2020-04-29 15:36:47 +02:00
parent 6e1aa20491
commit 41df6dcc0a
1 changed files with 7 additions and 2 deletions
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9
drivers/iommu/iommu.c
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@ -44,6 +44,7 @@ struct iommu_group {
int id;
struct iommu_domain *default_domain;
struct iommu_domain *domain;
struct list_head entry;
};
struct group_device {
@ -184,7 +185,7 @@ static void dev_iommu_free(struct device *dev)
dev->iommu = NULL;
}
static int __iommu_probe_device(struct device *dev)
static int __iommu_probe_device(struct device *dev, struct list_head *group_list)
{
const struct iommu_ops *ops = dev->bus->iommu_ops;
struct iommu_device *iommu_dev;
@ -204,6 +205,9 @@ static int __iommu_probe_device(struct device *dev)
}
iommu_group_put(group);
if (group_list && !group->default_domain && list_empty(&group->entry))
list_add_tail(&group->entry, group_list);
iommu_device_link(iommu_dev, dev);
return 0;
@ -234,7 +238,7 @@ int iommu_probe_device(struct device *dev)
if (ops->probe_device) {
struct iommu_group *group;
ret = __iommu_probe_device(dev);
ret = __iommu_probe_device(dev, NULL);
/*
* Try to allocate a default domain - needs support from the
@ -567,6 +571,7 @@ struct iommu_group *iommu_group_alloc(void)
group->kobj.kset = iommu_group_kset;
mutex_init(&group->mutex);
INIT_LIST_HEAD(&group->devices);
INIT_LIST_HEAD(&group->entry);
BLOCKING_INIT_NOTIFIER_HEAD(&group->notifier);
ret = ida_simple_get(&iommu_group_ida, 0, 0, GFP_KERNEL);