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=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 D530EC48BD6 for ; Thu, 27 Jun 2019 04:45:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A253E21897 for ; Thu, 27 Jun 2019 04:45:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1561610718; bh=K5SUY54SELZy1+lViKPOPr+FMJUSCP3gUFGFg03T6N8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=gKH2Durv/Qqafb7gHakgke37cPMSHrmlQkPc+iQcKAtvw61fwLI9vA8Nu6sI37SHQ dnpOGDmAR9icv7qcZWADHZHnj8ZhzCroKXfG9SHd6kw4Fjd35XHI8b41uyxxyAVnN6 d8qziT9dTAbwZ+9cVfgNBGfDbh1XhiPzy0Jg7v6g= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727216AbfF0EpR (ORCPT ); Thu, 27 Jun 2019 00:45:17 -0400 Received: from mail.kernel.org ([198.145.29.99]:56506 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727124AbfF0EpN (ORCPT ); Thu, 27 Jun 2019 00:45:13 -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 6AC1021855; Thu, 27 Jun 2019 04:45:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1561610712; bh=K5SUY54SELZy1+lViKPOPr+FMJUSCP3gUFGFg03T6N8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VcAQbH78K3Q74ErLQKjNUikUSjDpjyRSUPz1TDnnl5xy5zK1TDA53Pageqwq/mjf2 kxa3bPlibB3B5DpHEs3RDfxs+aBW8hjS7XigMTp4u7tA70CpVo7JlDBKFKkF+k83Qa 9bORDvXcvy5/k/6Bba+OFLfWx5/CVLA2NCDIX2W0= From: Andy Lutomirski To: x86@kernel.org Cc: LKML , Kees Cook , Florian Weimer , Jann Horn , Andy Lutomirski , stable@vger.kernel.org, Borislav Petkov , Kernel Hardening , Peter Zijlstra , Thomas Gleixner Subject: [PATCH v2 1/8] x86/vsyscall: Remove the vsyscall=native documentation Date: Wed, 26 Jun 2019 21:45:02 -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 138f6664b2e2..0082d1e56999 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -5102,12 +5102,6 @@ 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