From: Robert Hancock <hancockr@shaw.ca>
To: Vasudevan S <savasude@gmail.com>
Cc: linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: PCI BIOS Bug messages
Date: Tue, 09 Jan 2007 20:53:57 -0600 [thread overview]
Message-ID: <45A45545.2040002@shaw.ca> (raw)
In-Reply-To: <fa.Qx7aDKdds0Jcb7QVB09RiurSBYo@ifi.uio.no>
Vasudevan S wrote:
> I run Fedora Core 6 on the 'compaq nc6320' laptop. I am using the
> '2.6.19.1' kernel.
>
> While booting the kernel, I noticed the following error message:
>
> PCI: BIOS Bug: MCFG area at f8000000 is not E820-reserved
> PCI: Not using MMCONFIG.
>
> After some search, I commented out the 'e820_all_mapped()' check in
> the 'pci_mmcfg_init()' function. I no longer see this message and MMCONFIG
> method seems to be used now.
>
> Is this the right thing to do?
Maybe on that box you can get away with it, but I believe the purpose of
the check is to weed out BIOSes that have totally broken MCFG tables. I
think there is some work going on to be able to check and/or bash the
chipset registers manually on various chipsets to reduce our reliance on
the BIOS getting this right..
--
Robert Hancock Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@nospamshaw.ca
Home Page: http://www.roberthancock.com/
next parent reply other threads:[~2007-01-10 2:54 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <fa.Qx7aDKdds0Jcb7QVB09RiurSBYo@ifi.uio.no>
2007-01-10 2:53 ` Robert Hancock [this message]
2007-01-10 2:25 PCI BIOS Bug messages Vasudevan S
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