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[Qemu-devel] [PATCH v0] spapr: Error out when CPU hotplug is attempted o
From: |
Bharata B Rao |
Subject: |
[Qemu-devel] [PATCH v0] spapr: Error out when CPU hotplug is attempted on older pseries machines |
Date: |
Wed, 6 Jul 2016 23:19:30 +0530 |
CPU hotplug and coldplug aren't supported prior to pseries-2.7.
query-hotpluggable-cpus and coldplug on older pseries machines are crashing
the QEMU. Fix this.
- Let query_hotpluggable_cpus return NULL for pseries < 2.7
- spapr_core_pre_plug() should fail hot/cold plug attempts for pseries < 2.7
- spapr_core_plug() should never be called for pseries < 2.7, hence use
an assert.
Signed-off-by: Bharata B Rao <address@hidden>
---
Applies on ppc-for-2.7 branch of David's tree.
hw/ppc/spapr.c | 5 +++++
hw/ppc/spapr_cpu_core.c | 19 ++++++-------------
2 files changed, 11 insertions(+), 13 deletions(-)
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 7f33a1b..e3a7912 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -2368,9 +2368,14 @@ static HotpluggableCPUList
*spapr_query_hotpluggable_cpus(MachineState *machine)
int i;
HotpluggableCPUList *head = NULL;
sPAPRMachineState *spapr = SPAPR_MACHINE(machine);
+ sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(machine);
int spapr_max_cores = max_cpus / smp_threads;
int smt = kvmppc_smt_threads();
+ if (!smc->dr_cpu_enabled) {
+ return NULL;
+ }
+
for (i = 0; i < spapr_max_cores; i++) {
HotpluggableCPUList *list_item = g_new0(typeof(*list_item), 1);
HotpluggableCPU *cpu_item = g_new0(typeof(*cpu_item), 1);
diff --git a/hw/ppc/spapr_cpu_core.c b/hw/ppc/spapr_cpu_core.c
index 70b6b0b..273207c 100644
--- a/hw/ppc/spapr_cpu_core.c
+++ b/hw/ppc/spapr_cpu_core.c
@@ -162,19 +162,12 @@ void spapr_core_plug(HotplugHandler *hotplug_dev,
DeviceState *dev,
int index;
int smt = kvmppc_smt_threads();
+ g_assert(smc->dr_cpu_enabled);
+
drc = spapr_dr_connector_by_id(SPAPR_DR_CONNECTOR_TYPE_CPU, cc->core_id);
index = cc->core_id / smt;
spapr->cores[index] = OBJECT(dev);
- if (!smc->dr_cpu_enabled) {
- /*
- * This is a cold plugged CPU core but the machine doesn't support
- * DR. So skip the hotplug path ensuring that the core is brought
- * up online with out an associated DR connector.
- */
- return;
- }
-
g_assert(drc);
/*
@@ -223,13 +216,13 @@ void spapr_core_pre_plug(HotplugHandler *hotplug_dev,
DeviceState *dev,
char *base_core_type = spapr_get_cpu_core_type(machine->cpu_model);
const char *type = object_get_typename(OBJECT(dev));
- if (strcmp(base_core_type, type)) {
- error_setg(&local_err, "CPU core type should be %s", base_core_type);
+ if (!smc->dr_cpu_enabled) {
+ error_setg(&local_err, "CPU hotplug not supported for this machine");
goto out;
}
- if (!smc->dr_cpu_enabled && dev->hotplugged) {
- error_setg(&local_err, "CPU hotplug not supported for this machine");
+ if (strcmp(base_core_type, type)) {
+ error_setg(&local_err, "CPU core type should be %s", base_core_type);
goto out;
}
--
2.7.4
- [Qemu-devel] [PATCH v0] spapr: Error out when CPU hotplug is attempted on older pseries machines,
Bharata B Rao <=