linux-kernel - Re: [PATCH v2 1/2] irqchip/gic-v3: Add Rockchip 3588001 errata workaround

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Date:   Tue, 18 Apr 2023 16:34:35 +0200
From:   Sebastian Reichel <sebastian.reichel@...labora.com>
To:     Marc Zyngier <maz@...nel.org>
Cc:     Heiko Stuebner <heiko@...ech.de>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peng Fan <peng.fan@....com>,
        Robin Murphy <robin.murphy@....com>,
        Peter Geis <pgwipeout@...il.com>,
        XiaoDong Huang <derrick.huang@...k-chips.com>,
        Kever Yang <kever.yang@...k-chips.com>,
        linux-rockchip@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel@...labora.com
Subject: Re: [PATCH v2 1/2] irqchip/gic-v3: Add Rockchip 3588001 errata
 workaround

Hi,

On Tue, Apr 18, 2023 at 09:58:17AM +0100, Marc Zyngier wrote:
> On Mon, 17 Apr 2023 22:40:33 +0100,
> Sebastian Reichel <sebastian.reichel@...labora.com> wrote:
> > On Mon, Apr 17, 2023 at 05:20:08PM +0100, Marc Zyngier wrote:
> > > Also, I don't see anything here addressing the *other* bug this
> > > platform suffers from, which is the 32bit limit to the allocations.
> > > Without a fix for it, this patch is pointless as the GIC may end-up
> > > with memory it cannot reach.
> > >
> > > What;s the plan for that?
> > 
> > It got fixed in RK3588.
> 
> So what's the plan for the affected SoCs? It might be a good idea to
> address it too, unless there are none of them in the wild?

The previous generation (RK3566 and RK3568) is affected by the 32
bit issue as well as the shareability issue. I'm currently focusing
on the RK3588 and that's the only Rockchip platform I have on my
desk. Missing PCIe support is a lot more critical on RK3588, because
multiple board designers decided to use a 2.5G PCIe network card
instead of using the 1G network MAC from the SoC.

Anyways, I will try to help out with RK356x once I find some time.

-- Sebastian

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