static void rtas_set_tce_bypass(sPAPREnvironment *spapr, uint32_t token, uint32_t nargs, target_ulong args, uint32_t nret, target_ulong rets) { VIOsPAPRBus *bus = spapr->vio_bus; VIOsPAPRDevice *dev; uint32_t unit, enable; if (nargs != 2) { rtas_st(rets, 0, -3); return; } unit = rtas_ld(args, 0); enable = rtas_ld(args, 1); dev = spapr_vio_find_by_reg(bus, unit); if (!dev) { rtas_st(rets, 0, -3); return; } if (enable) { dev->flags |= VIO_PAPR_FLAG_DMA_BYPASS; } else { dev->flags &= ~VIO_PAPR_FLAG_DMA_BYPASS; } rtas_st(rets, 0, 0); }