linux-kernel - Re: [patch] Make MMCONFIG space (extended PCI config space) a driver opt-in issue

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: <1198452807.6686.36.camel@pasglop>
Date:	Mon, 24 Dec 2007 10:33:27 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Matthew Wilcox <matthew@....cx>
Cc:	Arjan van de Ven <arjan@...radead.org>,
	Jeff Garzik <jeff@...zik.org>, linux-kernel@...r.kernel.org,
	gregkh@...e.de, linux-pci@...ey.karlin.mff.cuni.cz,
	torvalds@...ux-foundation.org
Subject: Re: [patch] Make MMCONFIG space (extended PCI config space) a
	driver opt-in issue


> I've occasionally wondered if that spinlock needs to get split up, but
> for the amount of pain that could ensue, I can't imagine it ever being
> worthwhile.

Wondered the same thing and decided against it. I do have every now and
then some really crazy cases to deal with. One of them is the need to
use something like fixmap/kmap_atomic because a vendors makes 32 bits
CPUs that need 512MB of address space to map config space :-)

Ben.


--
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/