diff options
| -rw-r--r-- | hw/hyperv/vmbus.c | 99 | ||||
| -rw-r--r-- | include/hw/hyperv/vmbus.h | 3 |
2 files changed, 102 insertions, 0 deletions
diff --git a/hw/hyperv/vmbus.c b/hw/hyperv/vmbus.c index 2acb218..f371240 100644 --- a/hw/hyperv/vmbus.c +++ b/hw/hyperv/vmbus.c @@ -1272,6 +1272,105 @@ void vmbus_free_req(void *req) g_free(req); } +static const VMStateDescription vmstate_sgent = { + .name = "vmbus/sgentry", + .version_id = 0, + .minimum_version_id = 0, + .fields = (VMStateField[]) { + VMSTATE_UINT64(base, ScatterGatherEntry), + VMSTATE_UINT64(len, ScatterGatherEntry), + VMSTATE_END_OF_LIST() + } +}; + +typedef struct VMBusChanReqSave { + uint16_t chan_idx; + uint16_t pkt_type; + uint32_t msglen; + void *msg; + uint64_t transaction_id; + bool need_comp; + uint32_t num; + ScatterGatherEntry *sgl; +} VMBusChanReqSave; + +static const VMStateDescription vmstate_vmbus_chan_req = { + .name = "vmbus/vmbus_chan_req", + .version_id = 0, + .minimum_version_id = 0, + .fields = (VMStateField[]) { + VMSTATE_UINT16(chan_idx, VMBusChanReqSave), + VMSTATE_UINT16(pkt_type, VMBusChanReqSave), + VMSTATE_UINT32(msglen, VMBusChanReqSave), + VMSTATE_VBUFFER_ALLOC_UINT32(msg, VMBusChanReqSave, 0, NULL, msglen), + VMSTATE_UINT64(transaction_id, VMBusChanReqSave), + VMSTATE_BOOL(need_comp, VMBusChanReqSave), + VMSTATE_UINT32(num, VMBusChanReqSave), + VMSTATE_STRUCT_VARRAY_POINTER_UINT32(sgl, VMBusChanReqSave, num, + vmstate_sgent, ScatterGatherEntry), + VMSTATE_END_OF_LIST() + } +}; + +void vmbus_save_req(QEMUFile *f, VMBusChanReq *req) +{ + VMBusChanReqSave req_save; + + req_save.chan_idx = req->chan->subchan_idx; + req_save.pkt_type = req->pkt_type; + req_save.msglen = req->msglen; + req_save.msg = req->msg; + req_save.transaction_id = req->transaction_id; + req_save.need_comp = req->need_comp; + req_save.num = req->sgl.nsg; + req_save.sgl = g_memdup(req->sgl.sg, + req_save.num * sizeof(ScatterGatherEntry)); + + vmstate_save_state(f, &vmstate_vmbus_chan_req, &req_save, NULL); + + g_free(req_save.sgl); +} + +void *vmbus_load_req(QEMUFile *f, VMBusDevice *dev, uint32_t size) +{ + VMBusChanReqSave req_save; + VMBusChanReq *req = NULL; + VMBusChannel *chan = NULL; + uint32_t i; + + vmstate_load_state(f, &vmstate_vmbus_chan_req, &req_save, 0); + + if (req_save.chan_idx >= dev->num_channels) { + error_report("%s: %u(chan_idx) > %u(num_channels)", __func__, + req_save.chan_idx, dev->num_channels); + goto out; + } + chan = &dev->channels[req_save.chan_idx]; + + if (vmbus_channel_reserve(chan, 0, req_save.msglen)) { + goto out; + } + + req = vmbus_alloc_req(chan, size, req_save.pkt_type, req_save.msglen, + req_save.transaction_id, req_save.need_comp); + if (req_save.msglen) { + memcpy(req->msg, req_save.msg, req_save.msglen); + } + + for (i = 0; i < req_save.num; i++) { + qemu_sglist_add(&req->sgl, req_save.sgl[i].base, req_save.sgl[i].len); + } + +out: + if (req_save.msglen) { + g_free(req_save.msg); + } + if (req_save.num) { + g_free(req_save.sgl); + } + return req; +} + static void channel_event_cb(EventNotifier *e) { VMBusChannel *chan = container_of(e, VMBusChannel, notifier); diff --git a/include/hw/hyperv/vmbus.h b/include/hw/hyperv/vmbus.h index 99b647e..40e8417 100644 --- a/include/hw/hyperv/vmbus.h +++ b/include/hw/hyperv/vmbus.h @@ -224,4 +224,7 @@ int vmbus_map_sgl(VMBusChanReq *req, DMADirection dir, struct iovec *iov, void vmbus_unmap_sgl(VMBusChanReq *req, DMADirection dir, struct iovec *iov, unsigned iov_cnt, size_t accessed); +void vmbus_save_req(QEMUFile *f, VMBusChanReq *req); +void *vmbus_load_req(QEMUFile *f, VMBusDevice *dev, uint32_t size); + #endif |