linux-kernel - Re: [Bug 9528] x86: Increase PCIBIOS_MIN_IO to 0x1500 to fix nForce 4 suspend-to-RAM

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]

Date:	Sun, 23 Dec 2007 20:19:37 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Carlos Corbacho <carlos@...angeworlds.co.uk>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>, Greg KH <gregkh@...e.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	Len Brown <lenb@...nel.org>, bugme-daemon@...zilla.kernel.org
Subject: Re: [Bug 9528] x86: Increase PCIBIOS_MIN_IO to 0x1500 to fix
	nForce 4 suspend-to-RAM

* Linus Torvalds <torvalds@...ux-foundation.org> wrote:

> > Why:
> > 
> > After debugging _PTS() in the DSDT, it turns out these nVidia boards are
> > trying to write to an IO port > 0x1000 (0x142E) during suspend. Before the
> > re-ordering, we got away with this.
> 
> Very interesting.
> 
> HOWEVER.
> 
> I'd much rather figure out what the magic IO resource is that clashes.

Carlos, could you please run the following script as root:

  http://redhat.com/~mingo/misc/probe-ports.sh

and send us the resulting probe-ports.txt file?

This script will probe all unused ports as per /proc/ioports and will 
list "suspect" IO port areas: ones that do not produce the expected 0xff 
default reply from unclaimed IO ports. Magic chipset register areas can 
potentially be mapped this way.

[ CAREFUL: This probes IO ports which might in theory trigger various
  nastiness such as lockups. I this on a few boxes and the script
  worked, but save any work in case you get lockups. ]

	Ingo
--
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/