Commit 31e6850e authored Apr 05, 2016 by Robin Murphy Committed by Joerg Roedel Apr 07, 2016

iommu: Add MMIO mapping type



On some platforms, MMIO regions might need slightly different treatment
compared to mapping regular memory; add the notion of MMIO mappings to
the IOMMU API's memory type flags, so that callers can let the IOMMU
drivers know to do the right thing.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

parent 01e23c93

include/linux/iommu.h

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -30,6 +30,7 @@
	#define IOMMU_WRITE (1 << 1)		#define IOMMU_WRITE (1 << 1)
	#define IOMMU_CACHE (1 << 2) /* DMA cache coherency */		#define IOMMU_CACHE (1 << 2) /* DMA cache coherency */
	#define IOMMU_NOEXEC (1 << 3)		#define IOMMU_NOEXEC (1 << 3)
			#define IOMMU_MMIO (1 << 4) /* e.g. things like MSI doorbells */

	struct iommu_ops;		struct iommu_ops;
	struct iommu_group;		struct iommu_group;