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[Qemu-devel] [PATCH v6 7/7] s390x/cpu: Allow hotplug of CPUs
From: |
Matthew Rosato |
Subject: |
[Qemu-devel] [PATCH v6 7/7] s390x/cpu: Allow hotplug of CPUs |
Date: |
Mon, 22 Feb 2016 12:06:37 -0500 |
Implement cpu hotplug routine and add the machine hook.
Signed-off-by: Matthew Rosato <address@hidden>
---
hw/s390x/s390-virtio-ccw.c | 33 +++++++++++++++++++++++++++++++++
target-s390x/cpu.c | 7 +++++++
2 files changed, 40 insertions(+)
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index 3090e76..ea007e8 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -22,6 +22,7 @@
#include "s390-pci-bus.h"
#include "hw/s390x/storage-keys.h"
#include "hw/compat.h"
+#include "qom/cpu.h"
#define TYPE_S390_CCW_MACHINE "s390-ccw-machine"
@@ -185,6 +186,37 @@ static HotplugHandler
*s390_get_hotplug_handler(MachineState *machine,
return NULL;
}
+static void s390_hot_add_cpu(const int64_t id, Error **errp)
+{
+ MachineState *machine = MACHINE(qdev_get_machine());
+
+ if (id < 0) {
+ error_setg(errp, "Invalid CPU id: %" PRIi64, id);
+ return;
+ }
+
+ if (cpu_exists(id)) {
+ error_setg(errp, "Unable to add CPU: %" PRIi64
+ ", it already exists", id);
+ return;
+ }
+
+ if (id >= max_cpus) {
+ error_setg(errp, "Unable to add CPU: %" PRIi64
+ ", max allowed: %d", id, max_cpus - 1);
+ return;
+ }
+
+ if (id != (last_cpu->cpu_index + 1)) {
+ error_setg(errp, "Unable to add CPU: %" PRIi64
+ ", The next available id is %d", id,
+ (last_cpu->cpu_index + 1));
+ return;
+ }
+
+ cpu_s390x_init(machine->cpu_model);
+}
+
static void ccw_machine_class_init(ObjectClass *oc, void *data)
{
MachineClass *mc = MACHINE_CLASS(oc);
@@ -193,6 +225,7 @@ static void ccw_machine_class_init(ObjectClass *oc, void
*data)
mc->init = ccw_init;
mc->reset = s390_machine_reset;
+ mc->hot_add_cpu = s390_hot_add_cpu;
mc->block_default_type = IF_VIRTIO;
mc->no_cdrom = 1;
mc->no_floppy = 1;
diff --git a/target-s390x/cpu.c b/target-s390x/cpu.c
index 8dfd063..1a4977e 100644
--- a/target-s390x/cpu.c
+++ b/target-s390x/cpu.c
@@ -32,6 +32,7 @@
#include "trace.h"
#ifndef CONFIG_USER_ONLY
#include "sysemu/arch_init.h"
+#include "hw/s390x/sclp.h"
#endif
#define CR0_RESET 0xE0UL
@@ -211,6 +212,12 @@ static void s390_cpu_realizefn(DeviceState *dev, Error
**errp)
#endif
scc->parent_realize(dev, errp);
+
+#if !defined(CONFIG_USER_ONLY)
+ if (dev->hotplugged) {
+ raise_irq_cpu_hotplug();
+ }
+#endif
}
static void s390_cpu_initfn(Object *obj)
--
1.9.1
- [Qemu-devel] [PATCH v6 0/7] Allow hotplug of s390 CPUs, Matthew Rosato, 2016/02/22
- [Qemu-devel] [PATCH v6 3/7] s390x/cpu: Move some CPU initialization into realize, Matthew Rosato, 2016/02/22
- [Qemu-devel] [PATCH v6 2/7] s390x/cpu: Set initial CPU state in common routine, Matthew Rosato, 2016/02/22
- [Qemu-devel] [PATCH v6 5/7] s390/virtio-ccw: Add hotplug handler, Matthew Rosato, 2016/02/22
- [Qemu-devel] [PATCH v6 6/7] cpu: Add a last_cpu macro, Matthew Rosato, 2016/02/22
- [Qemu-devel] [PATCH v6 7/7] s390x/cpu: Allow hotplug of CPUs,
Matthew Rosato <=
- [Qemu-devel] [PATCH v6 4/7] s390x/cpu: Add CPU property links, Matthew Rosato, 2016/02/22
- [Qemu-devel] [PATCH v6 1/7] s390x/cpu: Cleanup init in preparation for hotplug, Matthew Rosato, 2016/02/22