linux-kernel - Re: [PATCH 2/2] arm64: dts: juno: Describe the full GICv2m region

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Date:   Mon, 12 Feb 2018 18:17:13 +0000
From:   Sudeep Holla <sudeep.holla@....com>
To:     Marc Zyngier <marc.zyngier@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Liviu Dudau <liviu.dudau@....com>
Cc:     Sudeep Holla <sudeep.holla@....com>,
        Robin Murphy <robin.murphy@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 2/2] arm64: dts: juno: Describe the full GICv2m region



On 07/02/18 14:32, Marc Zyngier wrote:
> From: Robin Murphy <robin.murphy@....com>
> 
> Juno's GICv2m implementation consists of four frames providing 32
> interrupts each. Since it is possible to plug in enough PCIe endpoints
> to consume more than 32 MSIs, and the driver already has a bodge to
> handle multiple frames, let's expose the other three as well.
> 

Change on it own looks good. So if you want to merge via your tree:

Acked-by: Sudeep Holla <sudeep.holla@....com>

Let me know if you decide not to take it via your tree and you want me
to send it to arm-soc.

On the side note I just noticed the Juno TRM[1] has 64k for each of
these MSI frames(page 3-24 section 3.3.5 Application memory map summary)

I am not sure if TRM is wrong. This patch is just copying the 4k size
from frame 0 which got added with initial Juno DTS.

-- 
Regards,
Sudeep

[1]
http://infocenter.arm.com/help/topic/com.arm.doc.ddi0515f/DDI0515F_juno_arm_development_platform_soc_trm.pdf