From: Maxime Coquelin <[email protected]> This is a prerequisite for next patches to use them.
These features are required to properly support live migration and proper device initialization ordering. These are not in maintainer's branch at the moment: https://lore.kernel.org/lkml/[email protected] https://lore.kernel.org/lkml/[email protected] Signed-off-by: Eugenio Pérez <[email protected]> --- kernel/linux/uapi/linux/vduse.h | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/kernel/linux/uapi/linux/vduse.h b/kernel/linux/uapi/linux/vduse.h index 361eea511c21..b7f8c04a0a44 100644 --- a/kernel/linux/uapi/linux/vduse.h +++ b/kernel/linux/uapi/linux/vduse.h @@ -14,6 +14,12 @@ #define VDUSE_API_VERSION_1 1 +/* The VDUSE instance expects a request for vq ready */ +#define VDUSE_F_QUEUE_READY 0 + +/* The VDUSE instance expects a request for suspend */ +#define VDUSE_F_SUSPEND 1 + /* * Get the version of VDUSE API that kernel supported (VDUSE_API_VERSION). * This is used for future extension. @@ -63,6 +69,12 @@ struct vduse_dev_config { */ #define VDUSE_DESTROY_DEV _IOW(VDUSE_BASE, 0x03, char[VDUSE_NAME_MAX]) +/* Get the VDUSE supported features */ +#define VDUSE_GET_FEATURES _IOR(VDUSE_BASE, 0x04, __u64) + +/* Set the VDUSE features */ +#define VDUSE_SET_FEATURES _IOW(VDUSE_BASE, 0x05, __u64) + /* The ioctls for VDUSE device (/dev/vduse/$NAME) */ /** @@ -325,6 +337,8 @@ enum vduse_req_type { VDUSE_SET_STATUS, VDUSE_UPDATE_IOTLB, VDUSE_SET_VQ_GROUP_ASID, + VDUSE_SET_VQ_READY, + VDUSE_SUSPEND, }; /** @@ -372,6 +386,15 @@ struct vduse_iova_range_v2 { __u32 padding; }; +/** + * struct vduse_vq_ready - Virtqueue ready request message + * @num: Virtqueue number + */ +struct vduse_vq_ready { + __u32 num; + __u32 ready; +}; + /** * struct vduse_dev_request - control request * @type: request type @@ -382,6 +405,7 @@ struct vduse_iova_range_v2 { * @iova: IOVA range for updating * @iova_v2: IOVA range for updating if API_VERSION >= 1 * @vq_group_asid: ASID of a virtqueue group + * @vq_ready: Virtqueue ready request * @padding: padding * * Structure used by read(2) on /dev/vduse/$NAME. @@ -399,6 +423,10 @@ struct vduse_dev_request { */ struct vduse_iova_range_v2 iova_v2; struct vduse_vq_group_asid vq_group_asid; + + /* Only if VDUSE_F_QUEUE_READY is negotiated */ + struct vduse_vq_ready vq_ready; + __u32 padding[32]; }; }; -- 2.55.0
