lkml.org 
[lkml]   [2020]   [Feb]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH] x86/reboot: Enable restart_handler mechanism
From
Date
Hi,

Gentle reminder.

Thanks.
Benjamin

On 17/01/2020 14:45, Benjamin Bouvier wrote:
> Drivers may want to register restart_handlers for case where an external
> reset is needed to reset a complete system and not only the processor.
> This case is currently missing in x86 architecture.
> So include call to do_kernel_restart() to use handlers registered
> through register_restart_handler() API when the processor restarts.
>
> do_kernel_restart() cannot be called in machine_restart() as required by
> documentation as final step, because it will never be reached (restart
> having already been carried out). So call is done inside
> native_machine_restart(), and only here to not let drivers managed reset
> in hypervisor case where function native_machine_restart() is overridden.
>
> Co-developed-by: Patrick Lelu <patrick.lelu@nokia.com>
> Signed-off-by: Patrick Lelu <patrick.lelu@nokia.com>
> Signed-off-by: Benjamin Bouvier <benjamin.bouvier@nokia.com>
> ---
> arch/x86/kernel/reboot.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
> index 0cc7c0b106bb..53c3d5a3f89d 100644
> --- a/arch/x86/kernel/reboot.c
> +++ b/arch/x86/kernel/reboot.c
> @@ -718,12 +718,13 @@ static void __machine_emergency_restart(int emergency)
> machine_ops.emergency_restart();
> }
>
> -static void native_machine_restart(char *__unused)
> +static void native_machine_restart(char *cmd)
> {
> pr_notice("machine restart\n");
>
> if (!reboot_force)
> machine_shutdown();
> + do_kernel_restart(cmd);
> __machine_emergency_restart(0);
> }
>
>

\
 
 \ /
  Last update: 2020-02-14 15:10    [W:0.041 / U:1.460 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site