diff options
Diffstat (limited to 'hw/spapr_vio.c')
| -rw-r--r-- | hw/spapr_vio.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/hw/spapr_vio.c b/hw/spapr_vio.c index 8f14fcc794..481a804e73 100644 --- a/hw/spapr_vio.c +++ b/hw/spapr_vio.c @@ -226,6 +226,12 @@ int spapr_tce_dma_write(VIOsPAPRDevice *dev, uint64_t taddr, const void *buf, (unsigned long long)taddr, size); #endif + /* Check for bypass */ + if (dev->flags & VIO_PAPR_FLAG_DMA_BYPASS) { + cpu_physical_memory_write(taddr, buf, size); + return 0; + } + while (size) { uint64_t tce; uint32_t lsize; @@ -313,6 +319,12 @@ int spapr_tce_dma_read(VIOsPAPRDevice *dev, uint64_t taddr, void *buf, (unsigned long long)taddr, size); #endif + /* Check for bypass */ + if (dev->flags & VIO_PAPR_FLAG_DMA_BYPASS) { + cpu_physical_memory_read(taddr, buf, size); + return 0; + } + while (size) { uint64_t tce; uint32_t lsize; @@ -513,6 +525,72 @@ int spapr_vio_send_crq(VIOsPAPRDevice *dev, uint8_t *crq) return 0; } +/* "quiesce" handling */ + +static void spapr_vio_quiesce_one(VIOsPAPRDevice *dev) +{ + dev->flags &= ~VIO_PAPR_FLAG_DMA_BYPASS; + + if (dev->rtce_table) { + size_t size = (dev->rtce_window_size >> SPAPR_VIO_TCE_PAGE_SHIFT) + * sizeof(VIOsPAPR_RTCE); + memset(dev->rtce_table, 0, size); + } + + dev->crq.qladdr = 0; + dev->crq.qsize = 0; + dev->crq.qnext = 0; +} + +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); +} + +static void rtas_quiesce(sPAPREnvironment *spapr, uint32_t token, + uint32_t nargs, target_ulong args, + uint32_t nret, target_ulong rets) +{ + VIOsPAPRBus *bus = spapr->vio_bus; + DeviceState *qdev; + VIOsPAPRDevice *dev = NULL; + + if (nargs != 0) { + rtas_st(rets, 0, -3); + return; + } + + QLIST_FOREACH(qdev, &bus->bus.children, sibling) { + dev = (VIOsPAPRDevice *)qdev; + spapr_vio_quiesce_one(dev); + } + + rtas_st(rets, 0, 0); +} + static int spapr_vio_busdev_init(DeviceState *qdev, DeviceInfo *qinfo) { VIOsPAPRDeviceInfo *info = (VIOsPAPRDeviceInfo *)qinfo; @@ -591,6 +669,10 @@ VIOsPAPRBus *spapr_vio_bus_init(void) spapr_register_hypercall(H_SEND_CRQ, h_send_crq); spapr_register_hypercall(H_ENABLE_CRQ, h_enable_crq); + /* RTAS calls */ + spapr_rtas_register("ibm,set-tce-bypass", rtas_set_tce_bypass); + spapr_rtas_register("quiesce", rtas_quiesce); + for (qinfo = device_info_list; qinfo; qinfo = qinfo->next) { VIOsPAPRDeviceInfo *info = (VIOsPAPRDeviceInfo *)qinfo; |