Start supporting CPU hotplug from pseries-2.5 onwards. Add CPU DRC (Dynamic Resource Connector) device tree entries.
Signed-off-by: Bharata B Rao <bhar...@linux.vnet.ibm.com> Reviewed-by: David Gibson <da...@gibson.dropbear.id.au> --- hw/ppc/spapr.c | 23 +++++++++++++++++++++++ include/hw/ppc/spapr.h | 1 + 2 files changed, 24 insertions(+) diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 030ee35..814b0a6 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -973,6 +973,16 @@ static void spapr_finalize_fdt(sPAPRMachineState *spapr, _FDT(spapr_drc_populate_dt(fdt, 0, NULL, SPAPR_DR_CONNECTOR_TYPE_LMB)); } + if (smc->dr_cpu_enabled) { + int offset = fdt_path_offset(fdt, "/cpus"); + ret = spapr_drc_populate_dt(fdt, offset, NULL, + SPAPR_DR_CONNECTOR_TYPE_CPU); + if (ret < 0) { + fprintf(stderr, "Couldn't set up CPU DR device tree properties\n"); + exit(1); + } + } + _FDT((fdt_pack(fdt))); if (fdt_totalsize(fdt) > FDT_MAX_SIZE) { @@ -1727,6 +1737,8 @@ static void ppc_spapr_init(MachineState *machine) long load_limit, fw_size; bool kernel_le = false; char *filename; + int smt = kvmppc_smt_threads(); + int smp_max_cores = DIV_ROUND_UP(max_cpus, smp_threads); msi_supported = true; @@ -1793,6 +1805,15 @@ static void ppc_spapr_init(MachineState *machine) spapr_validate_node_memory(machine); } + if (smc->dr_cpu_enabled) { + for (i = 0; i < smp_max_cores; i++) { + sPAPRDRConnector *drc = + spapr_dr_connector_new(OBJECT(spapr), + SPAPR_DR_CONNECTOR_TYPE_CPU, i * smt); + qemu_register_reset(spapr_drc_reset, drc); + } + } + /* init CPUs */ if (machine->cpu_model == NULL) { machine->cpu_model = kvm_enabled() ? "host" : "POWER7"; @@ -2277,6 +2298,7 @@ static void spapr_machine_class_init(ObjectClass *oc, void *data) mc->cpu_index_to_socket_id = spapr_cpu_index_to_socket_id; smc->dr_lmb_enabled = false; + smc->dr_cpu_enabled = false; fwc->get_dev_path = spapr_get_fw_dev_path; nc->nmi_monitor_handler = spapr_nmi; } @@ -2443,6 +2465,7 @@ static void spapr_machine_2_5_class_init(ObjectClass *oc, void *data) mc->alias = "pseries"; mc->is_default = 1; smc->dr_lmb_enabled = true; + smc->dr_cpu_enabled = true; } static const TypeInfo spapr_machine_2_5_info = { diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h index 5baa906..716d7ad 100644 --- a/include/hw/ppc/spapr.h +++ b/include/hw/ppc/spapr.h @@ -36,6 +36,7 @@ struct sPAPRMachineClass { /*< public >*/ bool dr_lmb_enabled; /* enable dynamic-reconfig/hotplug of LMBs */ + bool dr_cpu_enabled; /* enable dynamic-reconfig/hotplug of CPUs */ }; /** -- 2.1.0