diff options
Diffstat (limited to 'hw/ppc/spapr_rtas_ddw.c')
| -rw-r--r-- | hw/ppc/spapr_rtas_ddw.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/hw/ppc/spapr_rtas_ddw.c b/hw/ppc/spapr_rtas_ddw.c index 13d339c807..bb7d91b6d1 100644 --- a/hw/ppc/spapr_rtas_ddw.c +++ b/hw/ppc/spapr_rtas_ddw.c @@ -215,6 +215,7 @@ static void rtas_ibm_remove_pe_dma_window(PowerPCCPU *cpu, SpaprPhbState *sphb; SpaprTceTable *tcet; uint32_t liobn; + bool def_win_removed; if ((nargs != 1) || (nret != 1)) { goto param_error_exit; @@ -231,9 +232,23 @@ static void rtas_ibm_remove_pe_dma_window(PowerPCCPU *cpu, goto param_error_exit; } + def_win_removed = tcet->def_win; spapr_tce_table_disable(tcet); trace_spapr_iommu_ddw_remove(liobn); + /* + * PAPR+/LoPAPR says: + * The platform must restore the default DMA window for the PE on a call + * to the ibm,remove-pe-dma-window RTAS call when all of the following + * are true: + * a. The call removes the last DMA window remaining for the PE. + * b. The DMA window being removed is not the default window + */ + if (spapr_phb_get_active_win_num(sphb) == 0 && !def_win_removed) { + spapr_phb_dma_reset(sphb); + trace_spapr_iommu_ddw_reset(sphb->buid, 0); + } + rtas_st(rets, 0, RTAS_OUT_SUCCESS); return; |