linux-kernel - Re: [PATCH v9 02/10] irqchip/riscv-intc: Allow large non-standard interrupt number

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Date: Thu, 22 Feb 2024 22:33:58 +0100
From: Thomas Gleixner <tglx@...utronix.de>
To: Yu Chien Peter Lin <peterlin@...estech.com>, acme@...nel.org,
 adrian.hunter@...el.com, ajones@...tanamicro.com,
 alexander.shishkin@...ux.intel.com, andre.przywara@....com,
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Cc: Randolph <randolph@...estech.com>, Atish Patra <atishp@...osinc.com>
Subject: Re: [PATCH v9 02/10] irqchip/riscv-intc: Allow large non-standard
 interrupt number

On Thu, Feb 22 2024 at 16:39, Yu Chien Peter Lin wrote:
> Currently, the implementation of the RISC-V INTC driver uses the
> interrupt cause as the hardware interrupt number, with a maximum of
> 64 interrupts. However, the platform can expand the interrupt number
> further for custom local interrupts.
>
> To fully utilize the available local interrupt sources, switch
> to using irq_domain_create_tree() that creates the radix tree
> map, add global variables (riscv_intc_nr_irqs, riscv_intc_custom_base
> and riscv_intc_custom_nr_irqs) to determine the valid range of local
> interrupt number (hwirq).
>
> Signed-off-by: Yu Chien Peter Lin <peterlin@...estech.com>
> Reviewed-by: Randolph <randolph@...estech.com>
> Reviewed-by: Anup Patel <anup@...infault.org>
> Reviewed-by: Atish Patra <atishp@...osinc.com>

Reviewed-by: Thomas Gleixner <tglx@...utronix.de>