How to enable TrustZone feature?

[targetnull]

Hi,
I try to compile this linux branch to test kvm and TrustZone feature, but this branch seems not to support TrustZone feature? Some DMA-relevant functions are misssing.

Is there anyway to make it support TrustZone feature? If not, is there a way to enable kvm in command options when compiling the kernel?

It seems that I have to use something like make menuconfig to config it, but what if it is in a Makefile? It would be very convenient if it can be enabled just using command options.

Thanks.
Tgn