From: Thomas Gleixner <tglx@kernel.org>
To: Prabhakar <prabhakar.csengg@gmail.com>,
Philipp Zabel <p.zabel@pengutronix.de>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Magnus Damm <magnus.damm@gmail.com>
Cc: linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
Prabhakar <prabhakar.csengg@gmail.com>,
Biju Das <biju.das.jz@bp.renesas.com>,
Fabrizio Castro <fabrizio.castro.jz@renesas.com>,
Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Subject: Re: [PATCH 4/6] irqchip/renesas-rzv2h: Add CA55 software interrupt support
Date: Mon, 26 Jan 2026 17:03:49 +0100 [thread overview]
Message-ID: <87cy2wcqe2.ffs@tglx> (raw)
In-Reply-To: <20260121150137.3364865-5-prabhakar.mahadev-lad.rj@bp.renesas.com>
On Wed, Jan 21 2026 at 15:01, Prabhakar wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
>
> The Renesas RZ/V2H ICU provides a software interrupt register (ICU_SWINT)
> that allows software to explicitly assert interrupts toward individual
> CA55 cores. Writing BIT(n) to ICU_SWINT triggers the corresponding
> interrupt.
>
> Introduce a debug mechanism to trigger software interrupts on individual
> Cortex-A55 cores via the RZ/V2H ICU. The interface is gated behind
> CONFIG_DEBUG_FS and a module parameter to ensure it only exists when
> explicitly enabled.
Can't you reuse/extend the existing mechanism provided by
CONFIG_GENERIC_IRQ_INJECTION (irq_inject_interrupt(), irq_debug_write())
instead of implementing yet another ad hoc debugfs magic?
Thanks,
tglx
next prev parent reply other threads:[~2026-01-26 16:03 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-21 15:01 [PATCH 0/6] irqchip/renesas-rzv2h: Add support to handle ICU error IRQ and add SWPE trigger Prabhakar
2026-01-21 15:01 ` [PATCH 1/6] irqchip/renesas-rzv2h: Use local node pointer Prabhakar
2026-01-21 15:01 ` [PATCH 2/6] irqchip/renesas-rzv2h: Use local device pointer in ICU probe Prabhakar
2026-01-21 15:01 ` [PATCH 3/6] irqchip/renesas-rzv2h: Switch to using dev_err_probe() Prabhakar
2026-01-21 15:01 ` [PATCH 4/6] irqchip/renesas-rzv2h: Add CA55 software interrupt support Prabhakar
2026-01-23 10:45 ` Geert Uytterhoeven
2026-01-23 11:24 ` Lad, Prabhakar
2026-01-26 16:03 ` Thomas Gleixner [this message]
2026-01-29 21:24 ` Lad, Prabhakar
2026-01-29 21:59 ` Thomas Gleixner
2026-01-30 11:17 ` Lad, Prabhakar
2026-01-30 14:52 ` Thomas Gleixner
2026-01-21 15:01 ` [PATCH 5/6] irqchip/renesas-rzv2h: Handle ICU error IRQ and add SWPE trigger Prabhakar
2026-01-22 8:20 ` Biju Das
2026-01-22 9:18 ` Lad, Prabhakar
2026-01-22 9:26 ` Biju Das
2026-01-26 16:11 ` Thomas Gleixner
2026-02-02 19:02 ` Lad, Prabhakar
2026-01-21 15:01 ` [PATCH 6/6] Documentation: ABI: Document rzv2h_icu debugfs triggers Prabhakar
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