Hi all,

I want the Guest OS to use the Arm-TF service in Host OS (It is the same as
using Trusted Application in OP-TEE). So I should provide some parameters
and call SMC instruction.

But it returns an "Undefined Instruction" in my Linux v4.9.51.
I find that KVM calls a " kvm_inject_undefined(vcpu);" when handling the
SMC instruction.

So, if I want the Guest OS to use the "Arm-TF service" or "TA", should I
simply change the kvm_inject_undefined() as "SMC #0", and carefully handle
the input parameters? What else should I do?

Sincerely,
Wang Chenxu