Hi All,
This is my first mail to this mail list, and nice to meet all of you!
Right now I’m porting XEN 4.8 to an ARMv8 board and I had met some problems
with domU’s pseudo physical address mapping.
Here is my situation:
I have a display control hardware that can move data from framebuffer to a display,
and I used passthrough method let domU use this hardware. The framebuffer lies in
domU’s RAM, and will be allocated a pseudo physical address during the boot process.
This address will also be past to my display control hardware.
But the problem is that this hardware will directly access this address to move data,
which means the framebuffer’s pseudo physical address must be 1:1 mapped
to actual physical address. But from my understanding, domU’s RAM is automatically
mapped to actual physical address by XEN.
So my question is:
Is there some way that I can set domU’s RAM to have a 1:1 mapping to actual physical
address so that pseudo physical address is the same as actual physical addresss?
Thanks in advance!
Best regards,
Danwei
