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Date: Thu, 21 Jun 2012 12:24:07 -0700
Message-ID: <CAE9FiQWBB0JVCLWa40k9qYJXGrv_z=RgspgQW4x2di0uCUFXmA@mail.gmail.com>
Subject: Re: SNB PCI root information
From: Yinghai Lu <yinghai@kernel.org>
To: Brice Goglin <brice.goglin@gmail.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>, Ulrich Drepper <drepper@gmail.com>,
        jbarnes@virtuousgeek.org,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        lenb@kernel.org, x86@kernel.org, linux-pci@vger.kernel.org
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On Wed, Jun 20, 2012 at 10:56 PM, Brice Goglin <brice.goglin@gmail.com> wrote:
>> I suspected that could be other problem. intel system before
>> sandbridge does not have IIO.
>> they will have ioh instead, and one ioh would connect to two cpu sockets.
>> but _PXM for root bus in dsdt only can return one value. Aka it is
>> acpi spec limitation.
>
> The machines I am talking about have two IOHs (one connected to each
> socket). I only have an old 2.6.27 boot log at hand, I'll ask my admins
> for more. Do you want the 2.6.27 dmesg anyway?
>

log from 2.6.27 should be good enough for this.

BIOS _PXM return 0 for both pci root buses?

those systems with two IOHs really deserve good BIOS.

Hope we can have more updated machines with open sourced firmware.

Thanks

Yinghai
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