Re: [PATCH v2 3/4] xen/riscv: implement basic aplic_preinit()

[Jan Beulich <jbeulich@xxxxxxxx>]

On 25.03.2025 18:36, Oleksii Kurochko wrote:
> Introduce preinitialization stuff for the RISC-V Advanced Platform-Level
> Interrupt Controller (APLIC) in Xen:
>  - Implementing the APLIC pre-initialization function (`aplic_preinit()`),
>    ensuring that only one APLIC instance is supported in S mode.
>  - Initialize APLIC's correspoinding DT node.
>  - Declaring the DT device match table for APLIC.
>  - Setting `aplic_info.hw_version` during its declaration.
>  - Declaring an APLIC device.
> 
> Since Microchip originally developed aplic.c [1], an internal discussion
> with them led to the decision to use the MIT license instead of the default
> GPL-2.0-only.
> 
> [1] 
> https://gitlab.com/xen-project/people/olkur/xen/-/commit/7cfb4bd4748ca268142497ac5c327d2766fb342d
> 
> Signed-off-by: Romain Caritey <Romain.Caritey@xxxxxxxxxxxxx>
> Signed-off-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>

You recall that From: != 1st S-o-b is unusual, and wants some explanation.
IOW it's unclear who the original author of this patch is.

> --- /dev/null
> +++ b/xen/arch/riscv/aplic.c
> @@ -0,0 +1,49 @@
> +/* SPDX-License-Identifier: MIT */
> +
> +/*
> + * xen/arch/riscv/aplic.c
> + *
> + * RISC-V Advanced Platform-Level Interrupt Controller support
> + *
> + * Copyright (c) 2023-2024 Microchip.
> + * Copyright (c) 2024-2025 Vates
> + */
> +
> +#include <xen/errno.h>
> +#include <xen/init.h>
> +#include <xen/types.h>
> +
> +#include <asm/device.h>
> +#include <asm/intc.h>
> +
> +static struct intc_info aplic_info = {
> +    .hw_version = INTC_APLIC
> +};

Is this going to be written to (much) post-init? IOW - __read_mostly or
even __ro_after_init?

With authorship clarified and this variable adjusted according to whatever
the longer term use of it is
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>

Jan