[SeaBIOS] SeaBIOS NVMe support

Hi, guys!

I wanna try to add NVMe support for SeaBIOS. But I have a problem: all addresses passed to NVMe ctrl (for example: queue addresses in ACQ and ASQ registers) are treated by controller as IO (not RAM).
Qemu 2.5.0: file exec.c: address_space_rw(): function memory_access_is_direct() returns false, but should be true. Am I missing smth, or it's special behaviour of SeaBios?

Have a nice day!

Best Regards,
Vladislav.