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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 D66DBC4360C for ; Thu, 10 Oct 2019 08:48:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AB5D2222C5 for ; Thu, 10 Oct 2019 08:48:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570697306; bh=YzbKdnyeAdGS6SxVj6Vh8w6hl9hCK0w4wCWdFEfXuUk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=AMuDUnsi/2r0hgl0LKvAScRP09PvJ78c9Se+YrNmXggf8QCJ6C9GgGabRg2y+hXFp FodjzjqhRfXsT8hgCyYvmXAc7rOzVWfj1+GexQzI6tGDfA3Yx6BHNWmJ7Zf8KmVCad bD5uTXonXmVw1sMWiuloPUJriA+yTu/3qG6mYrHc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389640AbfJJIsZ (ORCPT ); Thu, 10 Oct 2019 04:48:25 -0400 Received: from mail.kernel.org ([198.145.29.99]:54570 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388644AbfJJIsY (ORCPT ); Thu, 10 Oct 2019 04:48:24 -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 93A5B2064A; Thu, 10 Oct 2019 08:48:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570697302; bh=YzbKdnyeAdGS6SxVj6Vh8w6hl9hCK0w4wCWdFEfXuUk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ro0rwDwoEw+mUJxk2XM2SIgSadiOfYGy/Y+OBBCaGh7Qsv9MLBJrzJYG9l9DGna7l nBRGjUKnARAwkPsLJT9f+0OMMpZHDEwRmz5Fpqeqlf3Nw67GTfSVFwuvjx6oUbvr/G XiZCrikX4Rl9SBQ/7ih7idmXAeq9Ho9dPqYD2xe8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mian Yousaf Kaukab , Jeremy Linton , Andre Przywara , Catalin Marinas , Stefan Wahren , Suzuki K Poulose , Will Deacon , Ard Biesheuvel Subject: [PATCH 4.19 093/114] arm64: Add sysfs vulnerability show for spectre-v1 Date: Thu, 10 Oct 2019 10:36:40 +0200 Message-Id: <20191010083613.035890528@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191010083544.711104709@linuxfoundation.org> References: <20191010083544.711104709@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: Mian Yousaf Kaukab [ Upstream commit 3891ebccace188af075ce143d8b072b65e90f695 ] spectre-v1 has been mitigated and the mitigation is always active. Report this to userspace via sysfs Signed-off-by: Mian Yousaf Kaukab Signed-off-by: Jeremy Linton Reviewed-by: Andre Przywara Reviewed-by: Catalin Marinas Tested-by: Stefan Wahren Acked-by: Suzuki K Poulose Signed-off-by: Will Deacon Signed-off-by: Ard Biesheuvel Signed-off-by: Greg Kroah-Hartman --- arch/arm64/kernel/cpu_errata.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/arch/arm64/kernel/cpu_errata.c +++ b/arch/arm64/kernel/cpu_errata.c @@ -729,3 +729,9 @@ const struct arm64_cpu_capabilities arm6 { } }; + +ssize_t cpu_show_spectre_v1(struct device *dev, struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "Mitigation: __user pointer sanitization\n"); +}