Patchwork [05/21] introduce CPU hot-plug notifier

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Submitter Igor Mammedov
Date April 23, 2013, 8:29 a.m.
Message ID <1366705795-24732-6-git-send-email-imammedo@redhat.com>
Download mbox | patch
Permalink /patch/238837/
State New
Headers show

Comments

Igor Mammedov - April 23, 2013, 8:29 a.m.
hot-add CPU event will be distributed to acpi_piix4 and rtc_cmos

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
---
v3:
  * call notifier right before CPU becomes runable
v2:
  * move notifier to qom/cpu.c and call it from CPUClass.realize() on hotplug
  * remove get_firmware_id() since it belong to other patch
---
 include/sysemu/sysemu.h |    3 +++
 qom/cpu.c               |   12 ++++++++++++
 2 files changed, 15 insertions(+), 0 deletions(-)
Andreas Färber - April 24, 2013, 4:52 p.m.
Am 23.04.2013 10:29, schrieb Igor Mammedov:
> hot-add CPU event will be distributed to acpi_piix4 and rtc_cmos
> 
> Signed-off-by: Igor Mammedov <imammedo@redhat.com>
> ---
> v3:
>   * call notifier right before CPU becomes runable
> v2:
>   * move notifier to qom/cpu.c and call it from CPUClass.realize() on hotplug
>   * remove get_firmware_id() since it belong to other patch
> ---
>  include/sysemu/sysemu.h |    3 +++
>  qom/cpu.c               |   12 ++++++++++++
>  2 files changed, 15 insertions(+), 0 deletions(-)

Thanks, applied to qom-cpu:
https://github.com/afaerber/qemu-cpu/commits/qom-cpu

One comment below...

> 
> diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
> index 6578782..a8c3de1 100644
> --- a/include/sysemu/sysemu.h
> +++ b/include/sysemu/sysemu.h
> @@ -152,6 +152,9 @@ void do_pci_device_hot_remove(Monitor *mon, const QDict *qdict);
>  /* generic hotplug */
>  void drive_hot_add(Monitor *mon, const QDict *qdict);
>  
> +/* CPU hotplug */
> +void qemu_register_cpu_added_notifier(Notifier *notifier);

Would be nice to turn this into a gtk-doc comment explaining when the
notification is fired, as a follow-up.

Andreas

> +
>  /* pcie aer error injection */
>  void pcie_aer_inject_error_print(Monitor *mon, const QObject *data);
>  int do_pcie_aer_inject_error(Monitor *mon,
> diff --git a/qom/cpu.c b/qom/cpu.c
> index abb20d0..9f78114 100644
> --- a/qom/cpu.c
> +++ b/qom/cpu.c
> @@ -21,6 +21,17 @@
>  #include "qom/cpu.h"
>  #include "qemu-common.h"
>  #include "sysemu/kvm.h"
> +#include "qemu/notify.h"
> +#include "sysemu/sysemu.h"
> +
> +/* CPU hot-plug notifiers */
> +static NotifierList cpu_added_notifiers =
> +    NOTIFIER_LIST_INITIALIZER(cpu_add_notifiers);
> +
> +void qemu_register_cpu_added_notifier(Notifier *notifier)
> +{
> +    notifier_list_add(&cpu_added_notifiers, notifier);
> +}
>  
>  void cpu_reset_interrupt(CPUState *cpu, int mask)
>  {
> @@ -60,6 +71,7 @@ static void cpu_common_realizefn(DeviceState *dev, Error **errp)
>  {
>      if (dev->hotplugged) {
>          cpu_synchronize_post_init(CPU(dev));
> +        notifier_list_notify(&cpu_added_notifiers, dev);
>          cpu_resume(CPU(dev));
>      }
>  }
>

Patch

diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
index 6578782..a8c3de1 100644
--- a/include/sysemu/sysemu.h
+++ b/include/sysemu/sysemu.h
@@ -152,6 +152,9 @@  void do_pci_device_hot_remove(Monitor *mon, const QDict *qdict);
 /* generic hotplug */
 void drive_hot_add(Monitor *mon, const QDict *qdict);
 
+/* CPU hotplug */
+void qemu_register_cpu_added_notifier(Notifier *notifier);
+
 /* pcie aer error injection */
 void pcie_aer_inject_error_print(Monitor *mon, const QObject *data);
 int do_pcie_aer_inject_error(Monitor *mon,
diff --git a/qom/cpu.c b/qom/cpu.c
index abb20d0..9f78114 100644
--- a/qom/cpu.c
+++ b/qom/cpu.c
@@ -21,6 +21,17 @@ 
 #include "qom/cpu.h"
 #include "qemu-common.h"
 #include "sysemu/kvm.h"
+#include "qemu/notify.h"
+#include "sysemu/sysemu.h"
+
+/* CPU hot-plug notifiers */
+static NotifierList cpu_added_notifiers =
+    NOTIFIER_LIST_INITIALIZER(cpu_add_notifiers);
+
+void qemu_register_cpu_added_notifier(Notifier *notifier)
+{
+    notifier_list_add(&cpu_added_notifiers, notifier);
+}
 
 void cpu_reset_interrupt(CPUState *cpu, int mask)
 {
@@ -60,6 +71,7 @@  static void cpu_common_realizefn(DeviceState *dev, Error **errp)
 {
     if (dev->hotplugged) {
         cpu_synchronize_post_init(CPU(dev));
+        notifier_list_notify(&cpu_added_notifiers, dev);
         cpu_resume(CPU(dev));
     }
 }