Re: [Qemu-devel] [PATCH 11/12 v3] qmp: add cpu-add qmp command

[Luiz Capitulino <lcapitulino@redhat.com>]

On Tue, 26 Mar 2013 17:47:42 +0100
Igor Mammedov <imammedo@redhat.com> wrote:

> Signed-off-by: Igor Mammedov <imammedo@redhat.com>
> ---
> v3:
>   * it appears that 'online/offline' in cpu-set are confusing people
>     with what command actually does and users might have to distinguish
>     if 'offline' is not implemented by parsing error message. To simplify
>     things replace cpu-set with cpu-add command to show more clear what
>     command does and just add cpu-del when CPU remove is implemented.
> 
> v2:
>   * s/cpu_set/cpu-set/
>   * qmp doc style fix
>   * use bool type instead of opencodding online/offline string
>      suggested-by: Eric Blake <eblake@redhat.com>
> ---
>  include/sysemu/sysemu.h |  2 ++
>  qapi-schema.json        | 11 +++++++++++
>  qmp-commands.hx         | 23 +++++++++++++++++++++++
>  qmp.c                   |  5 +++++
>  stubs/Makefile.objs     |  1 +
>  stubs/do_cpu_hot_add.c  |  7 +++++++
>  6 files changed, 49 insertions(+)
>  create mode 100644 stubs/do_cpu_hot_add.c

Personally, I'd prefer this patch squashed into the next one, but anyway:

Acked-by: Luiz Capitulino <lcapitulino@redhat.com>

> 
> diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
> index 4b8f721..8bcaf26 100644
> --- a/include/sysemu/sysemu.h
> +++ b/include/sysemu/sysemu.h
> @@ -156,6 +156,8 @@ void drive_hot_add(Monitor *mon, const QDict *qdict);
>  void qemu_register_cpu_add_notifier(Notifier *notifier);
>  void qemu_system_cpu_hotplug_request(uint32_t id);
>  
> +void do_cpu_hot_add(const int64_t id, Error **errp);
> +
>  /* 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/qapi-schema.json b/qapi-schema.json
> index af499bd..3a2f273 100644
> --- a/qapi-schema.json
> +++ b/qapi-schema.json
> @@ -1385,6 +1385,17 @@
>  { 'command': 'cpu', 'data': {'index': 'int'} }
>  
>  ##
> +# @cpu-add
> +#
> +# Adds CPU with specified id
> +#
> +# @id: cpu id of CPU to be created
> +#
> +# Returns: Nothing on success
> +##
> +{ 'command': 'cpu-add', 'data': {'id': 'int'} }
> +
> +##
>  # @memsave:
>  #
>  # Save a portion of guest memory to a file.
> diff --git a/qmp-commands.hx b/qmp-commands.hx
> index 2051fcb..4876393 100644
> --- a/qmp-commands.hx
> +++ b/qmp-commands.hx
> @@ -407,6 +407,29 @@ Example:
>  EQMP
>  
>      {
> +        .name       = "cpu-add",
> +        .args_type  = "id:i",
> +        .mhandler.cmd_new = qmp_marshal_input_cpu_add,
> +    },
> +
> +SQMP
> +cpu-add
> +-------
> +
> +Adds virtual cpu
> +
> +Arguments:
> +
> +- "id": cpu id (json-int)
> +
> +Example:
> +
> +-> { "execute": "cpu-add", "arguments": { "id": 2 } }
> +<- { "return": {} }
> +
> +EQMP
> +
> +    {
>          .name       = "memsave",
>          .args_type  = "val:l,size:i,filename:s,cpu:i?",
>          .mhandler.cmd_new = qmp_marshal_input_memsave,
> diff --git a/qmp.c b/qmp.c
> index 55b056b..978d956 100644
> --- a/qmp.c
> +++ b/qmp.c
> @@ -108,6 +108,11 @@ void qmp_cpu(int64_t index, Error **errp)
>      /* Just do nothing */
>  }
>  
> +void qmp_cpu_add(int64_t id, Error **errp)
> +{
> +    do_cpu_hot_add(id, errp);
> +}
> +
>  #ifndef CONFIG_VNC
>  /* If VNC support is enabled, the "true" query-vnc command is
>     defined in the VNC subsystem */
> diff --git a/stubs/Makefile.objs b/stubs/Makefile.objs
> index 6a492f5..4154a2b 100644
> --- a/stubs/Makefile.objs
> +++ b/stubs/Makefile.objs
> @@ -26,3 +26,4 @@ stub-obj-$(CONFIG_WIN32) += fd-register.o
>  stub-obj-y += resume_vcpu.o
>  stub-obj-y += get_icc_bus.o
>  stub-obj-y += qemu_system_cpu_hotplug_request.o
> +stub-obj-y += do_cpu_hot_add.o
> diff --git a/stubs/do_cpu_hot_add.c b/stubs/do_cpu_hot_add.c
> new file mode 100644
> index 0000000..1f6d7a6
> --- /dev/null
> +++ b/stubs/do_cpu_hot_add.c
> @@ -0,0 +1,7 @@
> +#include "qapi/error.h"
> +#include "sysemu/sysemu.h"
> +
> +void do_cpu_hot_add(const int64_t id, Error **errp)
> +{
> +    error_setg(errp, "Not implemented");
> +}