From d30ddcaa7b028049cdfee3a40248002d07b2bbf3 Mon Sep 17 00:00:00 2001 From: Eric Auger Date: Thu, 19 Jan 2017 20:57:48 +0000 Subject: iommu: Add a new type field in iommu_resv_region We introduce a new field to differentiate the reserved region types and specialize the apply_resv_region implementation. Legacy direct mapped regions have IOMMU_RESV_DIRECT type. We introduce 2 new reserved memory types: - IOMMU_RESV_MSI will characterize MSI regions that are mapped - IOMMU_RESV_RESERVED characterize regions that cannot by mapped. Signed-off-by: Eric Auger Tested-by: Tomasz Nowicki Tested-by: Bharat Bhushan Signed-off-by: Will Deacon --- include/linux/iommu.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'include/linux/iommu.h') diff --git a/include/linux/iommu.h b/include/linux/iommu.h index bfecb8b74078..233a6bf093bf 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -117,18 +117,25 @@ enum iommu_attr { DOMAIN_ATTR_MAX, }; +/* These are the possible reserved region types */ +#define IOMMU_RESV_DIRECT (1 << 0) +#define IOMMU_RESV_RESERVED (1 << 1) +#define IOMMU_RESV_MSI (1 << 2) + /** * struct iommu_resv_region - descriptor for a reserved memory region * @list: Linked list pointers * @start: System physical start address of the region * @length: Length of the region in bytes * @prot: IOMMU Protection flags (READ/WRITE/...) + * @type: Type of the reserved region */ struct iommu_resv_region { struct list_head list; phys_addr_t start; size_t length; int prot; + int type; }; #ifdef CONFIG_IOMMU_API -- cgit v1.2.3