From 8a69961c7f7583742ab9064feab5ea533a6b1b97 Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Mon, 19 Aug 2019 15:22:47 +0200 Subject: iommu: Add helpers to set/get default domain type Add a couple of functions to allow changing the default domain type from architecture code and a function for iommu drivers to request whether the default domain is passthrough. Signed-off-by: Joerg Roedel --- include/linux/iommu.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'include/linux/iommu.h') diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 64ebaff33455..29bac5345563 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -436,6 +436,9 @@ extern void iommu_get_resv_regions(struct device *dev, struct list_head *list); extern void iommu_put_resv_regions(struct device *dev, struct list_head *list); extern int iommu_request_dm_for_dev(struct device *dev); extern int iommu_request_dma_domain_for_dev(struct device *dev); +extern void iommu_set_default_passthrough(bool cmd_line); +extern void iommu_set_default_translated(bool cmd_line); +extern bool iommu_default_passthrough(void); extern struct iommu_resv_region * iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot, enum iommu_resv_type type); @@ -736,6 +739,19 @@ static inline int iommu_request_dma_domain_for_dev(struct device *dev) return -ENODEV; } +static inline void iommu_set_default_passthrough(bool cmd_line) +{ +} + +static inline void iommu_set_default_translated(bool cmd_line) +{ +} + +static inline bool iommu_default_passthrough(void) +{ + return true; +} + static inline int iommu_attach_group(struct iommu_domain *domain, struct iommu_group *group) { -- cgit v1.2.3-59-g8ed1b