linux-kernel - Re: [PATCH 1/1] drivers/misc: Add Altera System ID driver

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, 5 Mar 2013 19:12:27 +0800
From:	Ley Foon Tan <lftan@...era.com>
To:	Arnd Bergmann <arnd@...db.de>
CC:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Rob Landley <rob@...dley.net>, <linux-kernel@...r.kernel.org>,
	<linux-doc@...r.kernel.org>
Subject: Re: [PATCH 1/1] drivers/misc: Add Altera System ID driver

On Mon, 2013-03-04 at 12:55 +0000, Arnd Bergmann wrote:
> On Monday 04 March 2013, Ley Foon Tan wrote:
> > This IP core is not in the SoC. This core is in the FPGA and can be
> > accessed by the Nios II processor or accessed by SOCFPGA processor (ARM
> > based) via its interface to FPGA. Due to this, I think it shouldn't use
> > infrastructure in drivers/base/soc.c.
> > What do you think?
> 
> The sysid component gives a version for the entire FPGA part and all
> components inside it, right?
> 
> I think you should use the drivers/base/soc.c interface to describe the
> SOCFPGA SoC components as well as the actual FPGA. You basically
> end up having one device node that acts as the parent for the SoC
> components, and a way to retrieve version information about it.
> 
> Depending on how it fits the actual hardware layout more closely,
> you could have one node as the parent for all devices, or the
> FPGA SoC node as a child of the main one, or two SoC nodes side by
> side from the top-level.
> 
> 	Arnd
> 
The sysid give the unique system ID and system generation timestamp of
the system.

CASE 1:
SOCFPGA SoC + Sysid component in FPGA

CASE 2
Nios II soft core CPU + Sysid  (All in FPGA and no SoC is involved)

>From example use cases above, Case 2 doesn't involve SoC component. 
To support both cases, do you think drivers/base/soc.c is still
suitable?

Thanks.

LFTan




--
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/