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| author |  Xie Yongji <xieyongji@bytedance.com>
| 2022-08-03 12:55:22 +0800 |
|---|---|---|
| committer |  Michael S. Tsirkin <mst@redhat.com>
| 2022-08-11 04:26:08 -0400 |
| commit | 79a463be9e0051997508d52cf411ed5e91d657f6 (patch) | |
| tree | 7e327e0e4ccd6b416e44fa351e7f61020aa242f4 /include/uapi/linux/vduse.h | |
| parent | vduse: Support using userspace pages as bounce buffer (diff) | |
| download | linux-79a463be9e0051997508d52cf411ed5e91d657f6.tar.gz linux-79a463be9e0051997508d52cf411ed5e91d657f6.tar.bz2 linux-79a463be9e0051997508d52cf411ed5e91d657f6.zip | |
vduse: Support registering userspace memory for IOVA regions
Introduce two ioctls: VDUSE_IOTLB_REG_UMEM and
VDUSE_IOTLB_DEREG_UMEM to support registering
and de-registering userspace memory for IOVA
regions.
Now it only supports registering userspace memory
for bounce buffer region in virtio-vdpa case.
Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20220803045523.23851-5-xieyongji@bytedance.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include/uapi/linux/vduse.h')
| -rw-r--r-- | include/uapi/linux/vduse.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/include/uapi/linux/vduse.h b/include/uapi/linux/vduse.h index 7cfe1c1280c0..9885e0571f09 100644 --- a/include/uapi/linux/vduse.h +++ b/include/uapi/linux/vduse.h @@ -210,6 +210,29 @@ struct vduse_vq_eventfd { */ #define VDUSE_VQ_INJECT_IRQ _IOW(VDUSE_BASE, 0x17, __u32) +/** + * struct vduse_iova_umem - userspace memory configuration for one IOVA region + * @uaddr: start address of userspace memory, it must be aligned to page size + * @iova: start of the IOVA region + * @size: size of the IOVA region + * @reserved: for future use, needs to be initialized to zero + * + * Structure used by VDUSE_IOTLB_REG_UMEM and VDUSE_IOTLB_DEREG_UMEM + * ioctls to register/de-register userspace memory for IOVA regions + */ +struct vduse_iova_umem { + __u64 uaddr; + __u64 iova; + __u64 size; + __u64 reserved[3]; +}; + +/* Register userspace memory for IOVA regions */ +#define VDUSE_IOTLB_REG_UMEM _IOW(VDUSE_BASE, 0x18, struct vduse_iova_umem) + +/* De-register the userspace memory. Caller should set iova and size field. */ +#define VDUSE_IOTLB_DEREG_UMEM _IOW(VDUSE_BASE, 0x19, struct vduse_iova_umem) + /* The control messages definition for read(2)/write(2) on /dev/vduse/$NAME */ /** |