Here's the list of Huawei devices getting android 6. 0 marshmallow updates.

Huawei has published a list of devices getting the android 6.0 marshmallow update ofiicially. But the list Is officially for devices released in China.. but there is no information about rollouts for updates in other regions.
So here is the list:
1. Huawei P8
2. Ascend mate s
3. Ascend mate 7
4. Huawei p8 max
5. Ascend G7, G7 plus, G8
6.  Honor 7, 7i
7.  Honor 6, Honor 6 plus
8. Huawei media pad x2
9. Honor 4X,  Honor 4c

This is not the final list. Thus list will grown to more devices. Huawei is working for the updates. Almost in 2016 most of these devices officially avails this updates.