sev_data_activate
struct sev_data_activate activate;
case SEV_CMD_ACTIVATE: return sizeof(struct sev_data_activate);
int sev_guest_activate(struct sev_data_activate *data, int *error)
sev_guest_activate(struct sev_data_activate *data, int *error) { return -ENODEV; }
int sev_guest_activate(struct sev_data_activate *data, int *error);