On Mon, May 11, 2026 at 07:02:52PM -0700, Mukesh R wrote:
> Add data structs needed by the subsequent patch that introduces a new
> module to implement VFIO-MSHV pseudo device.
>
Reviewed-by: Souradeep Chakrabarti <[email protected]>
> Signed-off-by: Mukesh R <[email protected]>
> ---
> drivers/hv/mshv_root.h | 19 +++++++++++++++++++
> include/uapi/linux/mshv.h | 30 ++++++++++++++++++++++++++++++
> 2 files changed, 49 insertions(+)
>
> diff --git a/drivers/hv/mshv_root.h b/drivers/hv/mshv_root.h
> index a85c24dcc701..b9880d0bdc4d 100644
> --- a/drivers/hv/mshv_root.h
> +++ b/drivers/hv/mshv_root.h
> @@ -227,6 +227,25 @@ struct port_table_info {
> };
> };
>
> +struct mshv_device {
> + const struct mshv_device_ops *device_ops;
> + struct mshv_partition *device_pt;
> + void *device_private;
> + struct hlist_node device_ptnode;
> +};
> +
> +struct mshv_device_ops {
> + const char *device_name;
> + long (*device_create)(struct mshv_device *dev);
> + void (*device_release)(struct mshv_device *dev);
> + long (*device_set_attr)(struct mshv_device *dev,
> + struct mshv_device_attr *attr);
> + long (*device_has_attr)(struct mshv_device *dev,
> + struct mshv_device_attr *attr);
> +};
> +
> +extern struct mshv_device_ops mshv_vfio_device_ops;
> +
> int mshv_update_routing_table(struct mshv_partition *partition,
> const struct mshv_user_irq_entry *entries,
> unsigned int numents);
> diff --git a/include/uapi/linux/mshv.h b/include/uapi/linux/mshv.h
> index 32ff92b6342b..be6fe3ee8707 100644
> --- a/include/uapi/linux/mshv.h
> +++ b/include/uapi/linux/mshv.h
> @@ -404,4 +404,34 @@ struct mshv_sint_mask {
> /* hv_hvcall device */
> #define MSHV_HVCALL_SETUP _IOW(MSHV_IOCTL, 0x1E, struct
> mshv_vtl_hvcall_setup)
> #define MSHV_HVCALL _IOWR(MSHV_IOCTL, 0x1F, struct
> mshv_vtl_hvcall)
> +
> +/* Device passhthru */
> +#define MSHV_CREATE_DEVICE_TEST 1
> +
> +enum {
> + MSHV_DEV_TYPE_VFIO,
> + MSHV_DEV_TYPE_MAX,
> +};
> +
> +struct mshv_create_device {
> + __u32 type; /* in: MSHV_DEV_TYPE_xxx */
> + __u32 fd; /* out: device handle */
> + __u32 flags; /* in: MSHV_CREATE_DEVICE_xxx */
> +};
> +
> +#define MSHV_DEV_VFIO_FILE 1
> +#define MSHV_DEV_VFIO_FILE_ADD 1
> +#define MSHV_DEV_VFIO_FILE_DEL 2
> +
> +struct mshv_device_attr {
> + __u32 flags; /* no flags currently defined */
> + __u32 group; /* device-defined */
> + __u64 attr; /* group-defined */
> + __u64 addr; /* userspace address of attr data */
> +};
> +
> +/* Device fds created with MSHV_CREATE_DEVICE */
> +#define MSHV_SET_DEVICE_ATTR _IOW(MSHV_IOCTL, 0x00, struct mshv_device_attr)
> +#define MSHV_HAS_DEVICE_ATTR _IOW(MSHV_IOCTL, 0x01, struct mshv_device_attr)
> +
> #endif
> --
> 2.51.2.vfs.0.1
>
