linux-kernel - [PATCH 0/2] x86/vdso: RDPID support and a test

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

[an error occurred while processing this directive]

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

Message-Id: <cover.1479320367.git.luto@kernel.org>
Date:   Wed, 16 Nov 2016 10:23:26 -0800
From:   Andy Lutomirski <luto@...nel.org>
To:     x86@...nel.org
Cc:     Borislav Petkov <bp@...en8.de>, linux-kernel@...r.kernel.org,
        Megha <megha.dey@...el.com>, Andy Lutomirski <luto@...nel.org>
Subject: [PATCH 0/2] x86/vdso: RDPID support and a test

RDPID is a new instruction in unspecified future Intel processors
(sigh) that returns MSR_TSC_AUX.  This will finally let the vDSO
stop using LSL.

Patch 1 is the meat and patch 2 is the test.  Megha has kindly
tested them for me, since I don't own an unspecified Intel processor :)

Andy Lutomirski (2):
  x86/vdso: Use RDPID in preference to LSL when available
  selftests/x86: Add test_vdso to test getcpu

 arch/x86/include/asm/cpufeatures.h      |   1 +
 arch/x86/include/asm/vgtod.h            |   7 +-
 tools/testing/selftests/x86/Makefile    |   2 +-
 tools/testing/selftests/x86/test_vdso.c | 123 ++++++++++++++++++++++++++++++++
 4 files changed, 131 insertions(+), 2 deletions(-)
 create mode 100644 tools/testing/selftests/x86/test_vdso.c

-- 
2.7.4