[PATCH v2 4/7] iommu: Let iommu.strict override ops->def_domain_type

Niklas Schnelle
2022-11-16T17:17:22Z

When iommu.strict=1 is set or iommu_set_dma_strict() was called we
should use IOMMU_DOMAIN_DMA irrespective of ops->def_domain_type.

Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
---
drivers/iommu/iommu.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 65a3b3d886dc..d9bf94d198df 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -1562,6 +1562,9 @@ static int iommu_get_def_domain_type(struct device *dev)
{
const struct iommu_ops *ops = dev_iommu_ops(dev);

+ if (iommu_dma_strict)
+ return IOMMU_DOMAIN_DMA;
+
if (dev_is_pci(dev) && to_pci_dev(dev)->untrusted)
return IOMMU_DOMAIN_DMA;

--
2.34.1