linux-kernel - [PATCH] powerpc 4xx: DDR0_14[REDUC] decoded incorrectly

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-next>] [day] [month] [year] [list]

Message-ID: <49B54210.5040709@lebon.org.ua>
Date:	Mon, 09 Mar 2009 18:21:36 +0200
From:	Mikhail Zolotaryov <lebon@...on.org.ua>
To:	linux-kernel@...r.kernel.org
CC:	linuxppc-dev@...abs.org, jwboyer@...ux.vnet.ibm.com
Subject: [PATCH] powerpc 4xx: DDR0_14[REDUC] decoded incorrectly

Hi,

according to the PPC440EPx Embedded Processor User Manual (rev 1.14) 
DDR0_14[REDUC] bit has the following meaning:

REDUC - Enable the half data path feature of the controller
0 = Standard operation using full 64/72-bit memory bus
1 = Memory data path width is 32/40 bits

However, "1" is decoded as 64 bit (8 byte), "0" - as 32 bit (4 byte) bus 
by the kernel code. My understanding is this is not correct - patch 
attached.



View attachment "patch-ibm4xx_denali_fixup_memsize.patch" of type "text/plain" (412 bytes)