linux-kernel - Re: [PATCH] irqchip/armada-370-xp: Enable MSI affinity configuration

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Message-ID: <CA+aJhH27-TkorTqKVYBvHLz-8-0Pkbmjvx+aekb-24N75OAAKg@mail.gmail.com>
Date:   Fri, 22 Apr 2022 22:58:23 +1000
From:   Nathan Rossi <nathan@...hanrossi.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Marc Zyngier <maz@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Nathan Rossi <nathan.rossi@...i.com>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] irqchip/armada-370-xp: Enable MSI affinity configuration

On Fri, 22 Apr 2022 at 22:19, Andrew Lunn <andrew@...n.ch> wrote:
>
> > If you have a PCIe device that you can use with the 370 rd.
>
> Sorry, nothing on its bus.
>
> The only device i have which might make sense testing is a
> WRT1900ac. That has an Armada XP dual core. I could try building a UP
> kernel for it, but i guess you have tried that already with your
> machine in order to test a UP setup?

I have tested with SMP=n on a Armada 385 without any issues. So no
need to do that on the Armada XP.

There is still value in testing on the WRT1900ac device since so far I
have only tested on a Armada 385. The Armada XP does have
registers/etc. of the MPIC very similar to the 370, compared to the
385 having some significant differences. So if it is not too
problematic to test on (it appears to have its wifi attached via
PCIe?) please do.

Thanks,
Nathan

>
>         Andrew