From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,T_DKIMWL_WL_HIGH,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 94C55C4321A for ; Mon, 10 Jun 2019 20:25:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6CA9E2146E for ; Mon, 10 Jun 2019 20:25:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1560198341; bh=mMMMbSywgNKmt8zD+czRSCY41kftddjxk0jgfQZgDoA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=xpTrfvXgtzopC3JSJu4EtspRcZyZJ7DHat3CptqZvjH1UZH6rPPvxISFzMxVArNTv pYUFG0OgUuh3tuzVuCkgubFWtvSZccB4G46d+nk3lueD1vC+qoUPSGHfF7DUI7Qm1d JCgz/PYc9pasWMJp+/lpF6olG6IeSkWZHfxfG32o= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389529AbfFJUZk (ORCPT ); Mon, 10 Jun 2019 16:25:40 -0400 Received: from mail.kernel.org ([198.145.29.99]:45900 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728276AbfFJUZh (ORCPT ); Mon, 10 Jun 2019 16:25:37 -0400 Received: from localhost (c-67-180-165-146.hsd1.ca.comcast.net [67.180.165.146]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0272E2082E; Mon, 10 Jun 2019 20:25:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1560198337; bh=mMMMbSywgNKmt8zD+czRSCY41kftddjxk0jgfQZgDoA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ry+dHPkohHJXU/EtZM/nMdvNPZ3LdPqY7AkC9L21t/ULnbWtaQDx0klPtiCpQOj5t FI3blDhYWzaZzdU3T42yaXASzTtKsTlgWh8mIwK56TcEBaBCCfYMOFuOWVERoJU0Ts MQoAPkLD/6yijkUNela25mdzoFq8aSc402ks7Zwo= From: Andy Lutomirski To: x86@kernel.org Cc: LKML , Andy Lutomirski , stable@vger.kernel.org, Kees Cook , Borislav Petkov , Kernel Hardening , Peter Zijlstra , Thomas Gleixner Subject: [PATCH 1/5] x86/vsyscall: Remove the vsyscall=native documentation Date: Mon, 10 Jun 2019 13:25:27 -0700 Message-Id: X-Mailer: git-send-email 2.21.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The vsyscall=native feature is gone -- remove the docs. Fixes: 076ca272a14c ("x86/vsyscall/64: Drop "native" vsyscalls") Cc: stable@vger.kernel.org Cc: Kees Cook Cc: Borislav Petkov Cc: Kernel Hardening Cc: Peter Zijlstra Cc: Thomas Gleixner Signed-off-by: Andy Lutomirski --- Documentation/admin-guide/kernel-parameters.txt | 6 ------ 1 file changed, 6 deletions(-) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 43176340c73d..e1a3525d07f2 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -5086,12 +5086,6 @@ emulate [default] Vsyscalls turn into traps and are emulated reasonably safely. - native Vsyscalls are native syscall instructions. - This is a little bit faster than trapping - and makes a few dynamic recompilers work - better than they would in emulation mode. - It also makes exploits much easier to write. - none Vsyscalls don't work at all. This makes them quite hard to use for exploits but might break your system. -- 2.21.0