diff options
Diffstat (limited to 'hw/ppc/spapr_iommu.c')
| -rw-r--r-- | hw/ppc/spapr_iommu.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/hw/ppc/spapr_iommu.c b/hw/ppc/spapr_iommu.c index ef45f4f0cc..d9fe946818 100644 --- a/hw/ppc/spapr_iommu.c +++ b/hw/ppc/spapr_iommu.c @@ -243,6 +243,42 @@ static target_ulong h_put_tce(PowerPCCPU *cpu, sPAPREnvironment *spapr, return ret; } +static target_ulong get_tce_emu(sPAPRTCETable *tcet, target_ulong ioba, + target_ulong *tce) +{ + if (ioba >= tcet->window_size) { + hcall_dprintf("spapr_iommu_get_tce on out-of-bounds IOBA 0x" + TARGET_FMT_lx "\n", ioba); + return H_PARAMETER; + } + + *tce = tcet->table[ioba >> SPAPR_TCE_PAGE_SHIFT]; + + return H_SUCCESS; +} + +static target_ulong h_get_tce(PowerPCCPU *cpu, sPAPREnvironment *spapr, + target_ulong opcode, target_ulong *args) +{ + target_ulong liobn = args[0]; + target_ulong ioba = args[1]; + target_ulong tce = 0; + target_ulong ret = H_PARAMETER; + sPAPRTCETable *tcet = spapr_tce_find_by_liobn(liobn); + + ioba &= ~(SPAPR_TCE_PAGE_SIZE - 1); + + if (tcet) { + ret = get_tce_emu(tcet, ioba, &tce); + if (!ret) { + args[0] = tce; + } + } + trace_spapr_iommu_get(liobn, ioba, ret, tce); + + return ret; +} + int spapr_dma_dt(void *fdt, int node_off, const char *propname, uint32_t liobn, uint64_t window, uint32_t size) { @@ -295,6 +331,7 @@ static void spapr_tce_table_class_init(ObjectClass *klass, void *data) /* hcall-tce */ spapr_register_hypercall(H_PUT_TCE, h_put_tce); + spapr_register_hypercall(H_GET_TCE, h_get_tce); } static TypeInfo spapr_tce_table_info = { |