Re: [PATCH 17/22] vl: load plugins as late as possible

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

On 10/21/20 10:57 PM, Paolo Bonzini wrote:
> There is no need to load plugins in the middle of default device processing,
> move -plugin handling just before preconfig is entered.
> 
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
>   softmmu/vl.c | 15 ++++++++-------
>   1 file changed, 8 insertions(+), 7 deletions(-)
> 
> diff --git a/softmmu/vl.c b/softmmu/vl.c
> index 8577667b8f..75e57133ad 100644
> --- a/softmmu/vl.c
> +++ b/softmmu/vl.c
> @@ -125,6 +125,7 @@ static const char *boot_order;
>   static const char *boot_once;
>   static const char *incoming;
>   static const char *loadvm;
> +static QemuPluginList plugin_list = QTAILQ_HEAD_INITIALIZER(plugin_list);
>   enum vga_retrace_method vga_retrace_method = VGA_RETRACE_DUMB;
>   int mem_prealloc; /* force preallocation of physical target memory */
>   int display_opengl;
> @@ -3064,12 +3065,18 @@ void qemu_finish_machine_init(void)
>       MachineClass *machine_class = MACHINE_GET_CLASS(current_machine);
>       DisplayState *ds;
>   
> +    /* from here on runstate is RUN_STATE_PRELAUNCH */
> +

Please move this comment in your patch #11:
"vl: move prelaunch part of qemu_init to a new function"

Then:
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>

>       if (machine_class->default_ram_id && current_machine->ram_size &&
>           numa_uses_legacy_mem() && !current_machine->ram_memdev_id) {
>           create_default_memdev(current_machine, mem_path);
>       }
>   
> -    /* from here on runstate is RUN_STATE_PRELAUNCH */
> +    /* process plugin before CPUs are created, but once -smp has been parsed */
> +    if (qemu_plugin_load_list(&plugin_list)) {
> +        exit(1);
> +    }
> +
>       machine_run_board_init(current_machine);
>   
>       /*
> @@ -3196,7 +3203,6 @@ void qemu_init(int argc, char **argv, char **envp)
>       Error *err = NULL;
>       bool have_custom_ram_size;
>       BlockdevOptionsQueue bdo_queue = QSIMPLEQ_HEAD_INITIALIZER(bdo_queue);
> -    QemuPluginList plugin_list = QTAILQ_HEAD_INITIALIZER(plugin_list);
>   
>       qemu_add_opts(&qemu_drive_opts);
>       qemu_add_drive_opts(&qemu_legacy_drive_opts);
> @@ -4164,11 +4170,6 @@ void qemu_init(int argc, char **argv, char **envp)
>                                  machine_class->default_machine_opts, 0);
>       }
>   
> -    /* process plugin before CPUs are created, but once -smp has been parsed */
> -    if (qemu_plugin_load_list(&plugin_list)) {
> -        exit(1);
> -    }
> -
>       qemu_opts_foreach(qemu_find_opts("device"),
>                         default_driver_check, NULL, NULL);
>       qemu_opts_foreach(qemu_find_opts("global"),
>