This allows the default behavior to be controlled by a kernel config option instead of changing the commandline for the kernel to include "iommu.passthrough=on" on machines where this is desired.
Signed-off-by: Olof Johansson <[email protected]> --- drivers/iommu/Kconfig | 10 ++++++++++ drivers/iommu/iommu.c | 4 ++++ 2 files changed, 14 insertions(+) diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index 689ffe538370..a9bb1a5b5e43 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -60,6 +60,16 @@ config IOMMU_IO_PGTABLE_ARMV7S_SELFTEST endmenu +config IOMMU_DEFAULT_PASSTHROUGH + bool "IOMMU passthrough by default" + depends on IOMMU_API + help + Enable passthrough by default (removing the need to pass in + iommu.passthrough=on through command line). If this is enabled, + you can still disable with iommu.passthrough=off + + If unsure, say N here. + config IOMMU_IOVA tristate diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 63b37563db7e..ab8fc54467e0 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -36,7 +36,11 @@ static struct kset *iommu_group_kset; static DEFINE_IDA(iommu_group_ida); +#ifdef CONFIG_IOMMU_DEFAULT_PASSTHROUGH +static unsigned int iommu_def_domain_type = IOMMU_DOMAIN_IDENTITY; +#else static unsigned int iommu_def_domain_type = IOMMU_DOMAIN_DMA; +#endif struct iommu_callback_data { const struct iommu_ops *ops; -- 2.11.0 _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
