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| author | Alex Williamson <alex.williamson@redhat.com> | 2014-02-26 11:38:37 -0700 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2014-02-26 11:38:37 -0700 |
| commit | aa429318279b90192f35a97e9ccdc1e83b3a9624 (patch) | |
| tree | b27ec47dd53413e02c81376f80c10fd57ba4a334 /include/uapi/linux/vfio.h | |
| parent | 1ef3e2bc04223ff956dc62abaf2dff1f3322a431 (diff) | |
vfio/type1: Add extension to test DMA cache coherence of IOMMU
Now that the type1 IOMMU backend can support IOMMU_CACHE, we need to
be able to test whether coherency is currently enforced. Add an
extension for this.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'include/uapi/linux/vfio.h')
| -rw-r--r-- | include/uapi/linux/vfio.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h index 460fdf2e26f1..cb9023d4f063 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -24,6 +24,11 @@ #define VFIO_TYPE1_IOMMU 1 #define VFIO_SPAPR_TCE_IOMMU 2 #define VFIO_TYPE1v2_IOMMU 3 +/* + * IOMMU enforces DMA cache coherence (ex. PCIe NoSnoop stripping). This + * capability is subject to change as groups are added or removed. + */ +#define VFIO_DMA_CC_IOMMU 4 /* * The IOCTL interface is designed for extensibility by embedding the |