diff options
Diffstat (limited to 'include/uapi/linux/vhost.h')
| -rw-r--r-- | include/uapi/linux/vhost.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/include/uapi/linux/vhost.h b/include/uapi/linux/vhost.h index d6ad01fbb8d2..283348b64af9 100644 --- a/include/uapi/linux/vhost.h +++ b/include/uapi/linux/vhost.h @@ -242,4 +242,32 @@ #define VHOST_SET_FEATURES_ARRAY _IOW(VHOST_VIRTIO, 0x83, \ struct vhost_features_array) +/* fork_owner values for vhost */ +#define VHOST_FORK_OWNER_KTHREAD 0 +#define VHOST_FORK_OWNER_TASK 1 + +/** + * VHOST_SET_FORK_FROM_OWNER - Set the fork_owner flag for the vhost device, + * This ioctl must called before VHOST_SET_OWNER. + * Only available when CONFIG_VHOST_ENABLE_FORK_OWNER_CONTROL=y + * + * @param fork_owner: An 8-bit value that determines the vhost thread mode + * + * When fork_owner is set to VHOST_FORK_OWNER_TASK(default value): + * - Vhost will create vhost worker as tasks forked from the owner, + * inheriting all of the owner's attributes. + * + * When fork_owner is set to VHOST_FORK_OWNER_KTHREAD: + * - Vhost will create vhost workers as kernel threads. + */ +#define VHOST_SET_FORK_FROM_OWNER _IOW(VHOST_VIRTIO, 0x83, __u8) + +/** + * VHOST_GET_FORK_OWNER - Get the current fork_owner flag for the vhost device. + * Only available when CONFIG_VHOST_ENABLE_FORK_OWNER_CONTROL=y + * + * @return: An 8-bit value indicating the current thread mode. + */ +#define VHOST_GET_FORK_FROM_OWNER _IOR(VHOST_VIRTIO, 0x84, __u8) + #endif |