diff options
| author | Lu Baolu <baolu.lu@linux.intel.com> | 2020-11-24 14:06:01 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-11-25 13:14:33 +0100 |
| commit | 28b41e2c6aebd3caf99a77a76843c0175876bc72 (patch) | |
| tree | 34d19d914a9e5d17fd57a4985eaa2ab934f959a9 /drivers/iommu/iommu.c | |
| parent | Linux 5.10-rc3 (diff) | |
| download | linux-28b41e2c6aebd3caf99a77a76843c0175876bc72.tar.xz linux-28b41e2c6aebd3caf99a77a76843c0175876bc72.zip | |
iommu: Move def_domain type check for untrusted device into core
So that the vendor iommu drivers are no more required to provide the
def_domain_type callback to always isolate the untrusted devices.
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Cc: Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>
Link: https://lore.kernel.org/linux-iommu/243ce89c33fe4b9da4c56ba35acebf81@huawei.com/
Link: https://lore.kernel.org/r/20201124130604.2912899-2-baolu.lu@linux.intel.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to '')
| -rw-r--r-- | drivers/iommu/iommu.c | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index b53446bb8c6b..9a5ec1c7a8ac 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -1460,12 +1460,14 @@ EXPORT_SYMBOL_GPL(fsl_mc_device_group); static int iommu_get_def_domain_type(struct device *dev) { const struct iommu_ops *ops = dev->bus->iommu_ops; - unsigned int type = 0; + + if (dev_is_pci(dev) && to_pci_dev(dev)->untrusted) + return IOMMU_DOMAIN_DMA; if (ops->def_domain_type) - type = ops->def_domain_type(dev); + return ops->def_domain_type(dev); - return (type == 0) ? iommu_def_domain_type : type; + return 0; } static int iommu_group_alloc_default_domain(struct bus_type *bus, @@ -1507,7 +1509,7 @@ static int iommu_alloc_default_domain(struct iommu_group *group, if (group->default_domain) return 0; - type = iommu_get_def_domain_type(dev); + type = iommu_get_def_domain_type(dev) ? : iommu_def_domain_type; return iommu_group_alloc_default_domain(dev->bus, group, type); } @@ -1645,12 +1647,8 @@ struct __group_domain_type { static int probe_get_default_domain_type(struct device *dev, void *data) { - const struct iommu_ops *ops = dev->bus->iommu_ops; struct __group_domain_type *gtype = data; - unsigned int type = 0; - - if (ops->def_domain_type) - type = ops->def_domain_type(dev); + unsigned int type = iommu_get_def_domain_type(dev); if (type) { if (gtype->type && gtype->type != type) { |