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.
Showing the changes to include/uapi (1 of 2 files). Show all
Unified · Split
| @@ -210,6 +210,29 @@ struct vduse_vq_eventfd { · 209 unmodified lines | |||
| 210 | */ | 210 | */ |
| 211 | #define VDUSE_VQ_INJECT_IRQ _IOW(VDUSE_BASE, 0x17, __u32) | 211 | #define VDUSE_VQ_INJECT_IRQ _IOW(VDUSE_BASE, 0x17, __u32) |
| 212 | 212 | ||
| 213 | /** | ||
| 214 | * struct vduse_iova_umem - userspace memory configuration for one IOVA region | ||
| 215 | * @uaddr: start address of userspace memory, it must be aligned to page size | ||
| 216 | * @iova: start of the IOVA region | ||
| 217 | * @size: size of the IOVA region | ||
| 218 | * @reserved: for future use, needs to be initialized to zero | ||
| 219 | * | ||
| 220 | * Structure used by VDUSE_IOTLB_REG_UMEM and VDUSE_IOTLB_DEREG_UMEM | ||
| 221 | * ioctls to register/de-register userspace memory for IOVA regions | ||
| 222 | */ | ||
| 223 | struct vduse_iova_umem { | ||
| 224 | __u64 uaddr; | ||
| 225 | __u64 iova; | ||
| 226 | __u64 size; | ||
| 227 | __u64 reserved[3]; | ||
| 228 | }; | ||
| 229 | |||
| 230 | /* Register userspace memory for IOVA regions */ | ||
| 231 | #define VDUSE_IOTLB_REG_UMEM _IOW(VDUSE_BASE, 0x18, struct vduse_iova_umem) | ||
| 232 | |||
| 233 | /* De-register the userspace memory. Caller should set iova and size field. */ | ||
| 234 | #define VDUSE_IOTLB_DEREG_UMEM _IOW(VDUSE_BASE, 0x19, struct vduse_iova_umem) | ||
| 235 | |||
| 213 | /* The control messages definition for read(2)/write(2) on /dev/vduse/$NAME */ | 236 | /* The control messages definition for read(2)/write(2) on /dev/vduse/$NAME */ |
| 214 | 237 | ||
| 215 | /** | 238 | /** |