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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,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 18203C47404 for ; Fri, 4 Oct 2019 12:09:53 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id DF91D2070B for ; Fri, 4 Oct 2019 12:09:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="TBf7jkpQ"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="FuzKo3Bp" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DF91D2070B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=XJLJ/yOFydpXfH/bCQ4mdhjdR6xMQdpVuwR8jpOC70k=; b=TBf7jkpQQc15HV b1fQkp0aNwFxrugcn+Q07c70wZ+lUZyNkgNFMr86ltFlIIe/QHnq3Qi8qLJMQviQRnlOqmEw2bJBC 7tIzAr43EeQtVcLloqnT/QCEymF6tZ/jPqdhm4BBtNJfw2ESNn5e5RYBOgAXoi82ti1XSpmKY3QnX WRbsSt+ahdK7LL938wCu7FOC8nu+bQ3o86cTjRFUU+SNhAAjCs++NEwaYrHgR8+wyKCjNTNYBIIw9 qfRYxpZhbHPeKd47pIZnK39m2SKTnIEhDSqlgRURm2lj1VPANrokuAUahm3MzGby5ytwZpxU/mCQ7 Nv240JwDBE29dTgiNU2A==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1iGMP9-0007fS-9y; Fri, 04 Oct 2019 12:09:51 +0000 Received: from mail-wr1-x442.google.com ([2a00:1450:4864:20::442]) by bombadil.infradead.org with esmtps (Exim 4.92.2 #3 (Red Hat Linux)) id 1iGMKE-0001pj-7D for linux-arm-kernel@lists.infradead.org; Fri, 04 Oct 2019 12:04:48 +0000 Received: by mail-wr1-x442.google.com with SMTP id v8so6894678wrt.2 for ; Fri, 04 Oct 2019 05:04:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=tFoAdqBLSyk0vZf6DS/EoHCTPxZncgXa+o7HCkM11aA=; b=FuzKo3BpnIg/0swZYbfGIFA4PGyd2EHKLKAI8rLcm6NT6sa0/QWTzFQEtQJTEQoMn2 1Z8P/BT2kJTpL25lfJAK7xlYakdueOiMheXxevmb8d4pK6JWH0g3osVsKxbU4WwPgWa9 ukwzxksSebYMZ/uepoG7rgSc04lx17/7OiEU8rtoSbAokUhMVvYVFeUdb6jVhK6Y/SNv aChqcMrpCEadqBhzgEKck7nszBYjTx9hnT6A8Txc9++51TVY+co9ZM4tBwtkz0OVXCmG 2/ZtaX2mXqixZb7EHLg26aBNqr3bL/cycBSaCavuhPvD2TVlSSDBD5rnBadQO55Z1vCw D44g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=tFoAdqBLSyk0vZf6DS/EoHCTPxZncgXa+o7HCkM11aA=; b=rmmDRY2JNQJoQUF7TzLGKaZwWn127iDWxgX3eVxHZ8nzWvhaSedId0OMIeoCXZqIgR N4qdcGcIbE7eI3UWQuL+EXWaz+8AtTcw56Nuxl4pwUZEVGPRgyHwXSPSVABT5eTzsOA3 Jz/sLEuZBbjR9FzeTcbtvFK4uJ0x2LIliQ5qNwteQ67szhgZDNYkoNafBZiJRq9whyz2 6NQHJwgJyLC4RJx1Idro463qjH4wYzhNhfvsQ1l+6otit7PJs6DYnSL7Q6EozgJVvNOX g2rPNbUqPAwXyS8s28yeoUadQ1E1+XVKRChzcYSuEIjPYVO96mhPsh82FbvqwTevaI0L +gYA== X-Gm-Message-State: APjAAAXVv3zSWfv4IrxaCfls4OZ3ldC/tZ4ncoIZvwWNZ/Dk1aAXDt98 IkXhurZ4ZMdxGTA03htohQyImjuq09m9eRxb X-Google-Smtp-Source: APXvYqyWO4f+J8l9DLWRg98/8IopX9xSrB3tv+oCli1PaCRSBUAzuBYk0ryqZQPWW4C+tiCuZeNzSw== X-Received: by 2002:adf:ec86:: with SMTP id z6mr178703wrn.231.1570190684222; Fri, 04 Oct 2019 05:04:44 -0700 (PDT) Received: from sudo.home ([2a01:cb1d:112:6f00:b51e:3d9d:ec16:def5]) by smtp.gmail.com with ESMTPSA id f8sm5019628wmb.37.2019.10.04.05.04.42 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 04 Oct 2019 05:04:43 -0700 (PDT) From: Ard Biesheuvel To: linux-arm-kernel@lists.infradead.org Subject: [RFC/RFT PATCH 06/16] arm64: Add sysfs vulnerability show for spectre-v1 Date: Fri, 4 Oct 2019 14:04:20 +0200 Message-Id: <20191004120430.11929-7-ard.biesheuvel@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191004120430.11929-1-ard.biesheuvel@linaro.org> References: <20191004120430.11929-1-ard.biesheuvel@linaro.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191004_050446_307054_840DD06F X-CRM114-Status: GOOD ( 10.29 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Stefan Wahren , Suzuki K Poulose , Catalin Marinas , Ard Biesheuvel , Mian Yousaf Kaukab , Jeremy Linton , Andre Przywara , Marc Zyngier , Will Deacon , Will Deacon Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Mian Yousaf Kaukab 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 (cherry picked from commit 3891ebccace188af075ce143d8b072b65e90f695) Signed-off-by: Ard Biesheuvel --- arch/arm64/kernel/cpu_errata.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c index 7fe3a60d1086..3758ba538a43 100644 --- a/arch/arm64/kernel/cpu_errata.c +++ b/arch/arm64/kernel/cpu_errata.c @@ -729,3 +729,9 @@ const struct arm64_cpu_capabilities arm64_errata[] = { { } }; + +ssize_t cpu_show_spectre_v1(struct device *dev, struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "Mitigation: __user pointer sanitization\n"); +} -- 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel