Commit 5b45c921 authored by jiangdongxu's avatar jiangdongxu
Browse files

vhost-vdpa: add uAPI for device migration status 

virt inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I86ITO



----------------------------------------------------------------------

These new ioctl add support for setting vhost-vdpa device migration
state.

During migration, there is several migration state such as start/stop,
pre_start/pre_stop, post_start/post_stop, cancel etc.Some hardware needs
to do something at these stages, introduce a new ioctl to implement it.

Signed-off-by: default avatarjiangdongxu <jiangdongxu1@huawei.com>
parent 4c3d3bae

drivers/vhost/vdpa.c

+18 −0
Original line number Diff line number Diff line
@@ -629,6 +629,21 @@ static int vhost_vdpa_set_dev_buffer(struct vhost_vdpa *v, 
	return ret;

}



static int vhost_vdpa_set_mig_state(struct vhost_vdpa *v, u8 __user *c)

{

	struct vdpa_device *vdpa = v->vdpa;

	const struct vdpa_config_ops *ops = vdpa->config;

	u8 state;



	if (!ops->set_mig_state)

		return -EOPNOTSUPP;



	if (get_user(state, c))

		return -EFAULT;



	return ops->set_mig_state(vdpa, state);

}



static long vhost_vdpa_set_log_base(struct vhost_vdpa *v, u64 __user *argp)

{

	struct vdpa_device *vdpa = v->vdpa;
@@ -889,6 +904,9 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep, 
	case VHOST_SET_DEV_BUFFER:

		r = vhost_vdpa_set_dev_buffer(v, argp);

		break;

	case VHOST_VDPA_SET_MIG_STATE:

		r = vhost_vdpa_set_mig_state(v, argp);

		break;

	default:

		r = vhost_dev_ioctl(&v->vdev, cmd, argp);

		if (r == -ENOIOCTLCMD)

include/uapi/linux/vhost.h

+3 −0
Original line number Diff line number Diff line
@@ -197,4 +197,7 @@ 
#define VHOST_SET_DEV_BUFFER _IOW(VHOST_VIRTIO, 0xb1, struct vhost_vdpa_config)

#define VHOST_GET_DEV_BUFFER_SIZE _IOR(VHOST_VIRTIO, 0xb3, __u32)



/* set device migtration state */

#define VHOST_VDPA_SET_MIG_STATE _IOW(VHOST_VIRTIO, 0xb2, __u8)



#endif

include/uapi/linux/vhost_types.h

+16 −0
Original line number Diff line number Diff line
@@ -147,6 +147,22 @@ struct vhost_vdpa_iova_range { 
	__u64 last;

};



/* vhost vdpa device migration statue */

enum {

	VHOST_VDPA_DEVICE_START,

	VHOST_VDPA_DEVICE_STOP,

	VHOST_VDPA_DEVICE_PRE_START,

	VHOST_VDPA_DEVICE_PRE_STOP,

	VHOST_VDPA_DEVICE_CANCEL,

	VHOST_VDPA_DEVICE_POST_START,

	VHOST_VDPA_DEVICE_START_ASYNC,

	VHOST_VDPA_DEVICE_STOP_ASYNC,

	VHOST_VDPA_DEVICE_PRE_START_ASYNC,

	VHOST_VDPA_DEVICE_QUERY_OP_STATE,

	VHOST_VDPA_DEVICE_MSIX_MASK,

	VHOST_VDPA_DEVICE_MSIX_UNMASK,

};



/* Feature bits */

/* Log all write descriptors. Can be changed while device is active. */

#define VHOST_F_LOG_ALL 26