linux-kernel - Re: Running out of IO space because of innocuous-looking DSDT change

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Message-ID: <CAE9FiQWaRAv_UvvEzhg6XFK11Gvq6Gkq_APLpbX8NDWhbi-c2w@mail.gmail.com>
Date:	Mon, 19 Oct 2015 10:00:21 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Roland Dreier <roland@...nel.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Running out of IO space because of innocuous-looking DSDT change

On Mon, Oct 19, 2015 at 9:00 AM, Roland Dreier <roland@...nel.org> wrote:
> Would it make sense to change the kernel to reduce PCIBIOS_MIN_IO in
> my case?  I could make it generic and send it upstream, or just hack
> it locally.  Or (given my ignorance of ACPI in the real world) is this
> a broken BIOS change that I should ask my BIOS vendor to revert?
> Or... ?

I would suggest to expand standard_io_resources[] to include all
possible conflict that we should avoid, like the io port for serial and cf8/cf9.

Then we could just set PCIBIOS_MIN_IO to 0 for x86.

Thanks

Yinghai
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