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=-6.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 6272CC04E53 for ; Wed, 15 May 2019 12:13:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 299AC206BF for ; Wed, 15 May 2019 12:13:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557922404; bh=sb0bao1y/xAg9q+Mt9oaQ9Mqs1ec3BH3q5+p89URtCg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=qz5Jj3XYnkyT57uVBwvxD/S7Kv0IMj2mGuZLNb0SMJdaOHiVDN1gM8KESP/KiOfjE 97d1zu0ckk/DOMNxBGUzMQh95MnOe0JgKlTeQ8B2ZTl0zYGelgpxHBlmdArzUA69AE C98x+3o9O/2n4w1xcvqV7xeGAU9JiS7kihakH7Pw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726707AbfEOLFM (ORCPT ); Wed, 15 May 2019 07:05:12 -0400 Received: from mail.kernel.org ([198.145.29.99]:35188 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728581AbfEOLFL (ORCPT ); Wed, 15 May 2019 07:05:11 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 7D06A2173C; Wed, 15 May 2019 11:05:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557918311; bh=sb0bao1y/xAg9q+Mt9oaQ9Mqs1ec3BH3q5+p89URtCg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jnxy1tJi2h0GxRYezUvJdVzDeEC+bk3X7MasqqnnARfYACyzjojkmkt1yRI3TpDOq oYy1gR6taieBZnKTj9q+z52+FEE9lp5ZfaKAYcvG6VVr+c6UM7uq8D6+8av8rJXmLy DhCRv46qiFtXCR9j96fNgApdf4r1k1+qQZ9gc+F0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Diana Craciun , Michael Ellerman Subject: [PATCH 4.4 086/266] Documentation: Add nospectre_v1 parameter Date: Wed, 15 May 2019 12:53:13 +0200 Message-Id: <20190515090725.353417056@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190515090722.696531131@linuxfoundation.org> References: <20190515090722.696531131@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Diana Craciun commit 26cb1f36c43ee6e89d2a9f48a5a7500d5248f836 upstream. Currently only supported on powerpc. Signed-off-by: Diana Craciun Signed-off-by: Michael Ellerman Signed-off-by: Greg Kroah-Hartman --- Documentation/kernel-parameters.txt | 4 ++++ 1 file changed, 4 insertions(+) --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -2450,6 +2450,10 @@ bytes respectively. Such letter suffixes nohugeiomap [KNL,x86] Disable kernel huge I/O mappings. + nospectre_v1 [PPC] Disable mitigations for Spectre Variant 1 (bounds + check bypass). With this option data leaks are possible + in the system. + nospectre_v2 [X86,PPC_FSL_BOOK3E] Disable all mitigations for the Spectre variant 2 (indirect branch prediction) vulnerability. System may allow data leaks with this option, which is equivalent