Re: [PATCH v5 9/10] fixup! x68: acpi: trigger SMI before sending hotplug Notify event to OSPM

[Laszlo Ersek]

On 09/08/20 16:24, Igor Mammedov wrote:
> Add comment explaining why while_ctx2 restarts from the last processed CPU.
> 
> Signed-off-by: Igor Mammedov <imammedo@redhat.com>
> Reviewed-by: Laszlo Ersek <lersek@redhat.com>
> Tested-by: Laszlo Ersek <lersek@redhat.com>
> ---
>  hw/acpi/cpu.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/hw/acpi/cpu.c b/hw/acpi/cpu.c
> index 1283972001..8dd4d8ebbf 100644
> --- a/hw/acpi/cpu.c
> +++ b/hw/acpi/cpu.c
> @@ -601,6 +601,15 @@ void build_cpus_aml(Aml *table, MachineState *machine, 
> CPUHotplugFeatures opts,
>                      aml_append(while_ctx, aml_increment(cpu_idx));
>                  }
>                  aml_append(while_ctx2, while_ctx);
> +                /*
> +                 * If another batch is needed, then it will resume scanning
> +                 * exactly at -- and not after -- the last CPU that's 
> currently
> +                 * in CPU_ADDED_LIST. In other words, the last CPU in
> +                 * CPU_ADDED_LIST is going to be re-checked. That's OK: we've
> +                 * just cleared the insert event for *all* CPUs in
> +                 * CPU_ADDED_LIST, including the last one. So the scan will
> +                 * simply seek past it.
> +                 */
>              }
>              aml_append(method, while_ctx2);
>              aml_append(method, aml_release(ctrl_lock));
> 

Thank you!
Laszlo