linux-kernel - Re: [PATCH 0/5]PCI: x86 MMCONFIG - a couple of corrections to the preamble

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>] [day] [month] [year] [list]

Message-ID: <476CA0CF.3090607@redhat.com>
Date:	Sat, 22 Dec 2007 00:29:51 -0500
From:	Tony Camuso <tcamuso@...hat.com>
To:	gregkh@...e.de, linux-kernel@...r.kernel.org,
	linux-pci@...ey.karlin.mff.cuni.cz, prarit@...hat.com,
	tcamuso@...hat.com
Subject: Re: [PATCH 0/5]PCI: x86 MMCONFIG - a couple of corrections to the
 preamble

Some corrections to the preamble.

> The large amount of text is due to the nature of the
> problem and the discussion it engendered on the lkml.

Should say:

The large amount of text in the explanation below is due to
the nature of the problem and the discussion engendered on
lkml by my first submission.

> This patch-set detects the problem by comparing an MMCONFIG
> read to a Legacy PCI config read of the vendor/device dword
> of every device discovered during the PCI probing sequence.

Actually, the patch doesn't do a pci config read of EVERY device
discovered on every bus. Only on buses above a number defined
by PCI_MMCFG_MAX_CHECK_BUS and whose parent bus's pci_bus.ops
field points to pci_root_ops, which are mmconfig access routines
in systems in which mmconfig is the default mechanism.

In such cases where the parent bus pci_bus.ops field points
to pci_legacy_ops, the current bus does not need to be probed,
since its own pci_bus.ops field will inherit the pointer to
pci_legacy_ops from its parent.

--
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/