linux-kernel - Re: [RFC PATCH] PCI MMCONFIG: add validation against ACPI motherboard resources

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:	Wed, 23 May 2007 19:59:26 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Olivier Galibert <galibert@...ox.com>,
	Robert Hancock <hancockr@...w.ca>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Andi Kleen <ak@...e.de>, Chuck Ebbert <cebbert@...hat.com>,
	Len Brown <lenb@...nel.org>
Subject: Re: [RFC PATCH] PCI MMCONFIG: add validation against ACPI motherboard resources

On Wednesday, May 23, 2007 5:21:13 Linus Torvalds wrote:
> On Wed, 23 May 2007, Jesse Barnes wrote:
> > After I sent my last message I realized the same thing... though I
> > occasionally hear people talk about removing it (I seriously doubt that
> > will ever happen).  I don't even think there's a way to disable type 1
> > config access on Intel chipsets...
>
> Considering that the chipsets still have support for features that
> *really* aren't used (and haven't been used in over a decade), I doubt the
> conf1 thing is going away any time soon.
>
> Things like: A20 gate, 15-16MB holes, i387 FP exception on irq 13 are
> totally pointless in this day and age. Things like the DMA controller are
> getting there, along with PS/2 keyboard support.
>
> So there's a lot of things that are likely to be removed before conf1
> accesses would. Removing CONF1 accesses would break every single current
> OS, they'll do that ten years from now at the earliest.

So what do you think?  You ok with enabling mmconfig if it's available as long 
as we use type 1 accesses for non-extended stuff?  If so, I think the patches 
are pretty much ready...

Thanks,
Jesse
-
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/