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Re: [PATCH v13 13/14] xen/arm: Add vPSCI SYSTEM_SUSPEND policy


  • To: Mykola Kvach <mykola_kvach@xxxxxxxx>
  • From: Jan Beulich <jbeulich@xxxxxxxx>
  • Date: Wed, 28 Oct 2026 08:14:29 +0100
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  • Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Roger Pau Monné <roger@xxxxxxxxxxxxxx>, Mykyta Poturai <mykyta_poturai@xxxxxxxx>, Rahul Singh <rahul.singh@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
  • Delivery-date: Wed, 28 Oct 2026 07:14:38 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 27.10.2026 22:06, Mykola Kvach wrote:
> --- a/xen/arch/arm/Kconfig
> +++ b/xen/arch/arm/Kconfig
> @@ -19,6 +19,7 @@ config ARM
>       select HAS_ALTERNATIVE if HAS_VMAP
>       select HAS_DEVICE_TREE_DISCOVERY
>       select HAS_DOM0LESS
> +     select HAS_HWDOM_SYSTEM_SUSPEND if !MPU

Why the !MPU dependency? Nothing is being said in this regard in the 
description,
unless I overlooked something.

> --- a/xen/drivers/char/serial.c
> +++ b/xen/drivers/char/serial.c
> @@ -490,6 +490,8 @@ const struct vuart_info *serial_vuart_info(int idx)
>  
>  #ifdef CONFIG_SYSTEM_SUSPEND
>  
> +static bool __ro_after_init serial_suspend_available = true;

Nit: I'm not going to insist on a change to the name, but prefixing a static
variable in a file named serial.c with serial_ looks redundant to me. (I'm
also inclined to suggest s/available/possible/, seeing how the variable is
set / used.)

Jan



 


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