diff options
| -rw-r--r-- | drivers/iommu/iommu.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 1ecac2b5c54f..21d45e6a5931 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -1920,6 +1920,18 @@ static int iommu_get_default_domain_type(struct iommu_group *group, } } + /* + * If the common dma ops are not selected in kconfig then we cannot use + * IOMMU_DOMAIN_DMA at all. Force IDENTITY if nothing else has been + * selected. + */ + if (!IS_ENABLED(CONFIG_IOMMU_DMA)) { + if (WARN_ON(driver_type == IOMMU_DOMAIN_DMA)) + return -1; + if (!driver_type) + driver_type = IOMMU_DOMAIN_IDENTITY; + } + if (untrusted) { if (driver_type && driver_type != IOMMU_DOMAIN_DMA) { dev_err_ratelimited( |