linux-kernel - [PATCH v3 00/21] powerpc/8xx: Optimise MMU TLB handling and add support of 16k pages

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 for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20140917163656.E09D81AB026@localhost.localdomain>
Date:	Wed, 17 Sep 2014 18:36:56 +0200 (CEST)
From:	Christophe Leroy <christophe.leroy@....fr>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>
CC:	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	Joakim Tjernlund <joakim.tjernlund@...nsmode.se>,
	scottwood@...escale.com
Subject: [PATCH v3 00/21] powerpc/8xx: Optimise MMU TLB handling and add support of 16k pages

This patchset:
1) provides several MMU TLB handling optimisation on MPC8xx.
2) adds support of 16k pages on MPC8xx.
All changes have been successfully tested on a custom board equipped with MPC885

Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
Tested-by: Christophe Leroy <christophe.leroy@....fr>

---
Changes in v2:
- Patch number 10 removed, it was implementing a 16 bit alignment of the PGDIR.
It is not worth potentially wasting up to 64k of memory just for removing one
instruction (ori).
- Preserve r11 while calculating the level 2 address, therefore no more need to
save r11 into CR.

Changes in v3:
- Few fixes following review from Joachim Tjernlund
- Removed the major hack which was saving resisters in memory for CPU6 errata
- Invalidating non present TLB entries earlier (in head_8xx instead of fault.c)

 arch/powerpc/Kconfig                     |   2 +-
 arch/powerpc/include/asm/mmu-8xx.h       |   2 +
 arch/powerpc/include/asm/pgtable-ppc32.h |  20 ++
 arch/powerpc/include/asm/pte-8xx.h       |   7 +-
 arch/powerpc/include/asm/reg.h           |   3 +-
 arch/powerpc/kernel/head_8xx.S           | 370 ++++++++++++-------------
 arch/powerpc/mm/fault.c                  |   9 +-
 7 files changed, 203 insertions(+), 210 deletions(-)
--
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/