linux-kernel - Re: [PATCH 1/1] of/pci: Add IORESOURCE_MEM_64 to resource flags for 64-bit memory addresses

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Date:   Wed, 21 Apr 2021 11:14:25 -0300
From:   Leonardo Bras <leobras.c@...il.com>
To:     Rob Herring <robh+dt@...nel.org>
Cc:     Frank Rowand <frowand.list@...il.com>,
        Alexey Kardashevskiy <aik@...abs.ru>,
        devicetree@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        PCI <linux-pci@...r.kernel.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH 1/1] of/pci: Add IORESOURCE_MEM_64 to resource flags for
 64-bit memory addresses

On Tue, 2021-04-20 at 17:34 -0500, Rob Herring wrote:
> > [...]
> > I think the point here is bus resources not getting the MEM_64 flag,
> > but device resources getting it correctly. Is that supposed to happen?
> 
> I experimented with this on Arm with qemu and it seems fine there too.
> Looks like the BARs are first read and will have bit 2 set by default
> (or hardwired?). Now I'm just wondering why powerpc needs the code it
> has...
> 
> Anyways, I'll apply the patch.
> 
> Rob

Thanks Rob!