tm_cvmx_active
int tm_cvmx_active(struct task_struct *target, const struct user_regset *regset);
.active = tm_cvmx_active, .regset_get = tm_cvmx_get, .set = tm_cvmx_set
.active = tm_cvmx_active, .regset_get = tm_cvmx_get, .set = tm_cvmx_set