linux-kernel - Re: [PATCH 03/11] x86/dtb: Add a device tree for CE4100

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:	Tue, 30 Nov 2010 13:50:11 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Mitch Bradley <wmb@...mworks.com>,
	Scott Wood <scottwood@...escale.com>, sodaville@...utronix.de,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	x86@...nel.org, devicetree-discuss@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 03/11] x86/dtb: Add a device tree for CE4100

On Mon, 2010-11-29 at 23:47 +0000, Alan Cox wrote:
> 
> That may not be wise. Your real bus heirarchy may not be architecturally
> defined on some systems so you can't incorporate it into code, nor is it
> necessarily a heirarchy - eg some of the Geodes. 

Ok, so I'd suggest doing something like:

 - pci is below the corresponding atom node
 - isa is a child of pci

The later is a useful representation even if it doesn't correspond to
reality. From an address representation perspective, ISA can be
considered somewhat as a substractive decoding child of PCI (again even
if that's not 100% true), which simplifies the representation in the
device-tree a bit, and allows to still have things like VGA devices on
the PCI segment that decode IO ports in the ISA range.

Cheers,
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/