Is there a blockstorage , DeviceBlockInfo, BlockRegioninfo related configuration document?

[snikeguo]

The configuration is too complicated...

[josesimoes]

Unfortunately there is not... we are producing documentation on a "need to have" basis. These ones are required for porting and new targets therefore have a very low usage. The relevant parts are at the top and all fields are verbosely commented so you should be able to get a good sense on what's there by looking at the existing ones.