linux-kernel - Re: Affinity setting problem for emulated MSI on PLIC

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Message-ID:
 <MAUPR01MB110721C4A0C82AD2A8348CEF0FE32A@MAUPR01MB11072.INDPRD01.PROD.OUTLOOK.COM>
Date: Thu, 21 Aug 2025 14:32:37 +0800
From: Chen Wang <unicorn_wang@...look.com>
To: Inochi Amaoto <inochiama@...il.com>, Thomas Gleixner <tglx@...utronix.de>
Cc: linux-kernel@...r.kernel.org, Anup Patel <anup@...infault.org>,
 Paul Walmsley <paul.walmsley@...ive.com>,
 Samuel Holland <samuel.holland@...ive.com>, Marc Zyngier <maz@...nel.org>,
 Nam Cao <namcao@...utronix.de>
Subject: Re: Affinity setting problem for emulated MSI on PLIC


On 8/20/2025 3:40 PM, Chen Wang wrote:

[......]
> So it might be worth investigating why the two different processing 
> paths in `irq_startup()` cause this problem. I saw that Inochi 
> submitted a patch titled "irqchip/sifive-plic: Respect mask state when 
> setting affinity." Can we assume that simply applying this patch will 
> resolve the current issues with the SG2044? Do we also need to 
> consider introducing changes to the startup/shutdown functions of the 
> plic?

Sorry, please ignore my question. I looked at the patch again today and 
it is still necessary to introduce startup/shutdown for plic.

Thanks,

Chen

[......]