Re: [libvirt] [PATCHv3] qemu: add a check for slot and base when build dimm address

When hot-plug a memory device, we don't check if there is a memory device have the same address with the memory device we want hot-pluged. Qemu forbid use/hot-plug 2 memory device with same slot or the same base(qemu side this elemnt named addr). + for (i = 0; i < def->nmems; i++) { + virDomainMemoryDefPtr tmp = def->mems[i]; + + if (tmp == mem || + tmp->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_DIMM) + continue; + + if (mem->info.addr.dimm.slot == tmp->info.addr.dimm.slot) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("memory device slot '%u' is already being" + " used by another memory device"), + mem->info.addr.dimm.slot); + return true; + } + + if (mem->info.addr.dimm.base != 0 && tmp->info.addr.dimm.base != 0 && + mem->info.addr.dimm.base == tmp->info.addr.dimm.base) {

+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("memory device base '0x%llx' is already being" + " used by another memory device"), + mem->info.addr.dimm.base); + return true; + } + } + + return false; +} + char * qemuBuildMemoryDeviceStr(virDomainMemoryDefPtr mem, virDomainDefPtr def, @@ -4993,6 +5027,9 @@ qemuBuildMemoryDeviceStr(virDomainMemoryDefPtr mem, mem->targetNode, mem->info.alias, mem->info.alias); if (mem->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_DIMM) { + if (qemuCheckMemoryDimmConflict(def, mem)) + return NULL; + virBufferAsprintf(&buf, ",slot=%d", mem->info.addr.dimm.slot); virBufferAsprintf(&buf, ",addr=%llu", mem->info.addr.dimm.base); }