linux-kernel - [PATCH 0/2] arm64/mm: Enable color zero 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: Windows password security audit tool. GUI, reports in PDF.

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

Date:   Wed, 16 Sep 2020 13:25:21 +1000
From:   Gavin Shan <gshan@...hat.com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     mark.rutland@....com, anshuman.khandual@....com,
        catalin.marinas@....com, will@...nel.org,
        linux-kernel@...r.kernel.org, shan.gavin@...il.com
Subject: [PATCH 0/2] arm64/mm: Enable color zero pages

The feature of color zero pages isn't enabled on arm64, meaning all
read-only (anonymous) VM areas are backed up by same zero page. It
leads pressure to L1 (data) cache on reading data from them. This
tries to enable color zero pages.

PATCH[1/2] decouples the zero PGD table from zero page
PATCH[2/2] allocates the needed zero pages according to L1 cache size

Gavin Shan (2):
  arm64/mm: Introduce zero PGD table
  arm64/mm: Enable color zero pages

 arch/arm64/include/asm/cache.h       | 22 +++++++++++++++++
 arch/arm64/include/asm/mmu_context.h |  6 ++---
 arch/arm64/include/asm/pgtable.h     | 11 +++++++--
 arch/arm64/kernel/cacheinfo.c        | 34 +++++++++++++++++++++++++++
 arch/arm64/kernel/setup.c            |  2 +-
 arch/arm64/kernel/vmlinux.lds.S      |  4 ++++
 arch/arm64/mm/init.c                 | 35 ++++++++++++++++++++++++++++
 arch/arm64/mm/mmu.c                  |  7 ------
 arch/arm64/mm/proc.S                 |  2 +-
 9 files changed, 109 insertions(+), 14 deletions(-)

-- 
2.23.0