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Re: [XEN PATCH v5 4/7] xen/arm: allow dynamically assigned SGI handlers
- To: Jens Wiklander <jens.wiklander@xxxxxxxxxx>
- From: Bertrand Marquis <Bertrand.Marquis@xxxxxxx>
- Date: Fri, 31 May 2024 14:12:06 +0000
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- Cc: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, "patches@xxxxxxxxxx" <patches@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>
- Delivery-date: Fri, 31 May 2024 14:12:39 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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- Thread-topic: [XEN PATCH v5 4/7] xen/arm: allow dynamically assigned SGI handlers
Hi Jens,
> On 29 May 2024, at 09:25, Jens Wiklander <jens.wiklander@xxxxxxxxxx> wrote:
>
> Updates so request_irq() can be used with a dynamically assigned SGI irq
> as input. This prepares for a later patch where an FF-A schedule
> receiver interrupt handler is installed for an SGI generated by the
> secure world.
>
> From the Arm Base System Architecture v1.0C [1]:
> "The system shall implement at least eight Non-secure SGIs, assigned to
> interrupt IDs 0-7."
>
> gic_route_irq_to_xen() don't gic_set_irq_type() for SGIs since they are
> always edge triggered.
>
> gic_interrupt() is updated to route the dynamically assigned SGIs to
> do_IRQ() instead of do_sgi(). The latter still handles the statically
> assigned SGI handlers like for instance GIC_SGI_CALL_FUNCTION.
>
> [1] https://developer.arm.com/documentation/den0094/
>
> Signed-off-by: Jens Wiklander <jens.wiklander@xxxxxxxxxx>
Reviewed-by: Bertrand Marquis <bertrand.marquis@xxxxxxx>
Cheers
Bertrand
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