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Re: [PATCH v4][PART 2 07/10] xen/arm: Add support for system suspend triggered by hardware domain
- To: Mykola Kvach <xakep.amatop@xxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 2 Jun 2025 11:26:41 +0200
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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.pau@xxxxxxxxxx>, Shawn Anastasio <sanastasio@xxxxxxxxxxxxxxxxxxxxx>, Alistair Francis <alistair.francis@xxxxxxx>, Bob Eshleman <bobbyeshleman@xxxxxxxxx>, Connor Davis <connojdavis@xxxxxxxxx>, Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Mon, 02 Jun 2025 09:26:47 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 02.06.2025 11:04, Mykola Kvach wrote:
> @@ -857,8 +860,24 @@ void arch_domain_destroy(struct domain *d)
> domain_io_free(d);
> }
>
> -void arch_domain_shutdown(struct domain *d)
> +int arch_domain_shutdown(struct domain *d)
> {
> + switch ( d->shutdown_code )
> + {
> + case SHUTDOWN_suspend:
> +#ifdef CONFIG_SYSTEM_SUSPEND
> + if ( !is_hardware_domain(d) )
> + break;
> +
> + return host_system_suspend();
> +#else
> + break;
> +#endif
> + default:
> + break;
> + }
> +
> + return 0;
> }
What's wrong with
int arch_domain_shutdown(struct domain *d)
{
switch ( d->shutdown_code )
{
#ifdef CONFIG_SYSTEM_SUSPEND
case SHUTDOWN_suspend:
if ( !is_hardware_domain(d) )
break;
return host_system_suspend();
#endif
default:
break;
}
return 0;
}
?
> @@ -1311,13 +1316,13 @@ int domain_shutdown(struct domain *d, u8 reason)
> v->paused_for_shutdown = 1;
> }
>
> - arch_domain_shutdown(d);
> + ret = arch_domain_shutdown(d);
If non-zero comes back here, is ...
> __domain_finalise_shutdown(d);
... this still appropriate to call?
> spin_unlock(&d->shutdown_lock);
>
> - return 0;
> + return ret;
> }
Most callers don't care about the return value of this function. That likely
needs to change, even if _for now_ you only alter the SHUTDOWN_suspend case
(and hence some of the callers aren't immediately impacted)?
Jan
|
