From 1f9b32916b0859cda5ca40f785fbffd45b3e5a25 Mon Sep 17 00:00:00 2001 From: Mitchel Humpherys Date: Thu, 9 Jul 2015 16:59:02 -0700 Subject: iommu: Add iommu_trigger_fault It can be useful to trigger an IOMMU fault during development and debugging. Add support to the IOMMU framework to do so. Change-Id: I908c9f5b52c6abe937f031de546d290027ba64b5 Signed-off-by: Mitchel Humpherys --- include/linux/iommu.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'include/linux') diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 2e5b071d82d0..520cc5b4dae1 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -116,6 +116,7 @@ enum iommu_attr { * @domain_get_attr: Query domain attributes * @domain_set_attr: Change domain attributes * @pgsize_bitmap: bitmap of supported page sizes + * @trigger_fault: trigger a fault on the device attached to an iommu domain */ struct iommu_ops { bool (*capable)(enum iommu_cap); @@ -150,6 +151,7 @@ struct iommu_ops { u32 (*domain_get_windows)(struct iommu_domain *domain); int (*dma_supported)(struct iommu_domain *domain, struct device *dev, u64 mask); + void (*trigger_fault)(struct iommu_domain *domain); unsigned long pgsize_bitmap; }; @@ -185,6 +187,7 @@ extern phys_addr_t iommu_iova_to_phys_hard(struct iommu_domain *domain, dma_addr_t iova); extern void iommu_set_fault_handler(struct iommu_domain *domain, iommu_fault_handler_t handler, void *token); +extern void iommu_trigger_fault(struct iommu_domain *domain); extern int iommu_attach_group(struct iommu_domain *domain, struct iommu_group *group); @@ -374,6 +377,10 @@ static inline void iommu_set_fault_handler(struct iommu_domain *domain, { } +static inline void iommu_trigger_fault(struct iommu_domain *domain) +{ +} + static inline int iommu_attach_group(struct iommu_domain *domain, struct iommu_group *group) { -- cgit v1.2.3