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| author |   Robin Murphy <robin.murphy@arm.com> | 2016-04-05 12:39:30 +0100 |
|---|---|---|
| committer |   Joerg Roedel <jroedel@suse.de> | 2016-04-07 15:07:50 +0200 |
| commit | 31e6850e0fdb3a586363cc4d2f9801cdf9374310 (patch) | |
| tree | 42faaae6ea7e0aaff5b4677bb893b63f1acc344e /include/linux/iommu.h | |
| parent | iommu/mediatek: Add 4GB mode support (diff) | |
| download | wireguard-linux-31e6850e0fdb3a586363cc4d2f9801cdf9374310.tar.xz wireguard-linux-31e6850e0fdb3a586363cc4d2f9801cdf9374310.zip | |
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>
Diffstat (limited to 'include/linux/iommu.h')
| -rw-r--r-- | include/linux/iommu.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h index a5c539fa5d2b..34b643227df1 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -30,6 +30,7 @@ #define IOMMU_WRITE (1 << 1) #define IOMMU_CACHE (1 << 2) /* DMA cache coherency */ #define IOMMU_NOEXEC (1 << 3) +#define IOMMU_MMIO (1 << 4) /* e.g. things like MSI doorbells */ struct iommu_ops; struct iommu_group; |