diff options
| author | Shameer Kolothum <shameerali.kolothum.thodi@huawei.com> | 2019-07-23 19:06:36 +0300 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2019-08-19 22:55:50 +0300 |
| commit | a717072007e8aedd3f951726d8cf55454860b30d (patch) | |
| tree | fffcbd5bcc9cfef92128c0182fd1c157179a61b1 /include/uapi/linux/vfio.h | |
| parent | 9b77e5c79840fc334a5b7f770c5ab0c09dc0e028 (diff) | |
| download | linux-a717072007e8aedd3f951726d8cf55454860b30d.tar.xz | |
vfio/type1: Add IOVA range capability support
This allows the user-space to retrieve the supported IOVA
range(s), excluding any non-relaxable reserved regions. The
implementation is based on capability chains, added to
VFIO_IOMMU_GET_INFO ioctl.
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
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 | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h index 8f10748dac79..1259dccd09d2 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -714,7 +714,31 @@ struct vfio_iommu_type1_info { __u32 argsz; __u32 flags; #define VFIO_IOMMU_INFO_PGSIZES (1 << 0) /* supported page sizes info */ - __u64 iova_pgsizes; /* Bitmap of supported page sizes */ +#define VFIO_IOMMU_INFO_CAPS (1 << 1) /* Info supports caps */ + __u64 iova_pgsizes; /* Bitmap of supported page sizes */ + __u32 cap_offset; /* Offset within info struct of first cap */ +}; + +/* + * The IOVA capability allows to report the valid IOVA range(s) + * excluding any non-relaxable reserved regions exposed by + * devices attached to the container. Any DMA map attempt + * outside the valid iova range will return error. + * + * The structures below define version 1 of this capability. + */ +#define VFIO_IOMMU_TYPE1_INFO_CAP_IOVA_RANGE 1 + +struct vfio_iova_range { + __u64 start; + __u64 end; +}; + +struct vfio_iommu_type1_info_cap_iova_range { + struct vfio_info_cap_header header; + __u32 nr_iovas; + __u32 reserved; + struct vfio_iova_range iova_ranges[]; }; #define VFIO_IOMMU_GET_INFO _IO(VFIO_TYPE, VFIO_BASE + 12) |