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,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 70792C04E53 for ; Wed, 15 May 2019 11:04:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 42CF020881 for ; Wed, 15 May 2019 11:04:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557918280; bh=BDhAKQZ84otnksMOOOey3iqSRkUVLUm3sPvTkPVCm/A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=LRVqytAHhgpVeBdxB48vlnbPq9jom2AcxCIX1kRCaUOa4Ja+BZKY6BLIvqWmuyeQp efVWH6+D0xjFAvv8e1JQsiAXkXBrrbVQmh//PLo1Tt+P89ViPtNJdG3raTeR8GATK2 yXWUKVTpHiTiU7JCJBIR0THjIW/Pg3DUEkjWTk2k= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728492AbfEOLEj (ORCPT ); Wed, 15 May 2019 07:04:39 -0400 Received: from mail.kernel.org ([198.145.29.99]:34206 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728465AbfEOLEe (ORCPT ); Wed, 15 May 2019 07:04:34 -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 8B78620644; Wed, 15 May 2019 11:04:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557918274; bh=BDhAKQZ84otnksMOOOey3iqSRkUVLUm3sPvTkPVCm/A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0Gnyo6MuKze2hu+tZo9ATbx9mkdMX9XnI3d9jLjHOdUjWjA3jq0k3BxKWbKj5agl8 xaWPo/tpd4Zei490O07zKzqeraww5Ono8kkoIWP3OJoC1+YXNTXgcxtl2izca0Ndob A7w9b4p6r8ODRazXm4VeO4txszZtnvANg+R+sml8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Michael Ellerman Subject: [PATCH 4.4 030/266] powerpc/64s: Wire up cpu_show_spectre_v1() Date: Wed, 15 May 2019 12:52:17 +0200 Message-Id: <20190515090723.568655356@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: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Michael Ellerman commit 56986016cb8cd9050e601831fe89f332b4e3c46e upstream. Add a definition for cpu_show_spectre_v1() to override the generic version. Currently this just prints "Not affected" or "Vulnerable" based on the firmware flag. Although the kernel does have array_index_nospec() in a few places, we haven't yet audited all the powerpc code to see where it's necessary, so for now we don't list that as a mitigation. Signed-off-by: Michael Ellerman Signed-off-by: Greg Kroah-Hartman --- arch/powerpc/kernel/security.c | 8 ++++++++ 1 file changed, 8 insertions(+) --- a/arch/powerpc/kernel/security.c +++ b/arch/powerpc/kernel/security.c @@ -50,3 +50,11 @@ ssize_t cpu_show_meltdown(struct device return sprintf(buf, "Vulnerable\n"); } + +ssize_t cpu_show_spectre_v1(struct device *dev, struct device_attribute *attr, char *buf) +{ + if (!security_ftr_enabled(SEC_FTR_BNDS_CHK_SPEC_BAR)) + return sprintf(buf, "Not affected\n"); + + return sprintf(buf, "Vulnerable\n"); +}