linux-kernel - Re: PCI resource problems caused by improper address rounding

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <47686C09.1070602@redhat.com>
Date:	Tue, 18 Dec 2007 19:55:37 -0500
From:	Chuck Ebbert <cebbert@...hat.com>
To:	Robert Hancock <hancockr@...w.ca>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Richard Henderson <rth@...ddle.net>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	Daniel Ritz <daniel.ritz@....ch>, Greg KH <greg@...ah.com>,
	Keith Packard <keithp@...thp.com>,
	Bjorn Helgaas <bjorn.helgaas@...com>
Subject: Re: PCI resource problems caused by improper address rounding

On 12/18/2007 07:11 PM, Robert Hancock wrote:
>> However, I wonder about that
>>
>>     e0000000-efffffff : pnp 00:0b
>>
>> thing. I actually suspect that that whole allocation is literally
>> *meant* for that 256MB graphics aperture, but the kernel explicitly
>> avoids it because it's listed in the PnP tables.
> 
> That is probably the MMCONFIG aperture, in that case any attempt to map
> the graphics BAR there will have disastrous results. (This BIOS has an
> MCFG table, though it looks like this Fedora kernel has MMCONFIG
> disabled, so we can't tell what it actually contains.)
> 

You can boot with "pci=mmconf" to enable it.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/