[XenARM] Questions on Xen Back end and front end drivers

[akshay st <akshayts@xxxxxxxxxxx>]

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Hi,

I read that DOM0 implements and handles all device drivers. All Domu's 
access device driver through DOM0, For this back end and front end 
drivers were created?. Just for understanding i was going  through Linux XEN 
Block back end and front end driver.(xen-blkfront.c), I am not sure but i see 
that there no real device involved in frontend and backend 
communication? How does it boil down to Real device. What is the use of 
XEN Block back end and front end drivers since there communication 
happens only thru Memory ?.


For example i have a MTD Nand device which DOM0 should implement completely?. 

How can other Domains access this MTD Device I guess we have to have a MTD 
Back end driver for DOM0 and front end drivers for DOM U's? 


My understanding is Back end drivers should do hardware specific tasks?. 
Any good reference to understand backend and front end would be of great help.


Warm Regards,
Akshay

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