linux-kernel - Re: [PATCH v5] PCI: Align pci memory space base address with page size

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Date:   Mon, 10 Jul 2023 10:33:23 +0100
From:   Will Deacon <will@...nel.org>
To:     Huacai Chen <chenhuacai@...nel.org>
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>,
        loongson-kernel@...ts.loongnix.cn, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org, loongarch@...ts.linux.dev,
        Huacai Chen <chenhuacai@...ngson.cn>
Subject: Re: [PATCH v5] PCI: Align pci memory space base address with page
 size

On Sun, Jul 09, 2023 at 05:19:57PM +0800, Huacai Chen wrote:
> On Fri, Jul 7, 2023 at 10:47 AM bibo mao <maobibo@...ngson.cn> wrote:
> >
> > Bjourn, Hucai,
> >
> > ping again.
> >
> > The is such issue on only LoongArch system since 16K page size is used.
> >
> > Should we add code in general framework  or in LoongArch specified code
> > in v1?
> Though I still don't know why others have no problems. But it is
> surely a bug on LoongArch. So if Bjorn has no objections, please use
> the old method (just like v1 but you can simply align to page size
> unconditionally).

The initial assertion is that this is a problem for any architecture with
a page-size > 4K, so there's nothing LoongArch-specific about that on paper.

More likely, we've only just come out of the merge window so I suggest a
little patience is probably all that is needed.

Will