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=-9.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,T_DKIMWL_WL_HIGH,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 B4CF4C004C9 for ; Sun, 5 May 2019 04:15:38 +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 801BF20675 for ; Sun, 5 May 2019 04:15:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="tQyUmg5U" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 801BF20675 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com 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:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: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:In-Reply-To: References:List-Owner; bh=Cb+XPMvY46Rzx1ohgw3Oa0JeNfykoXT5OMmwIVfhLcI=; b=tQy Umg5UjFExTclhekveucLOZOZm7POv6xIGfcyVw1J9uGp5CHkbOHUN9HPD8wQpwfl3/PSOxTPDZx7z mZGs8hoYUEYTFPj5GnS1Eij5ZxgPbPv56BIMYJH9ZROSW6apnslurGs2isUmCWwzPWjf8Gz588W6N ztOjuPlkt3PUIkmaXq5z6ny+X9CVXkK9Hi4v8iLtOXd8Kxl1twUQBkGFLQ6fCM2NN6B0t6wWxJ+ij kkgFNKbwVddz5fso2FTjvC8GB9SLdjLgb1z9XU4tZ7jXbBbUnQBHd5UFPvlz6AHmlN7OoZ8HLQs7Z K2eL6CY/JI5VUXQRFQ2NamuBvPIaC8g==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hN8Yk-0002ZU-0N; Sun, 05 May 2019 04:15:30 +0000 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70] helo=foss.arm.com) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hN8Yg-0002Z7-Hd for linux-arm-kernel@lists.infradead.org; Sun, 05 May 2019 04:15:27 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 22FBB374; Sat, 4 May 2019 21:15:21 -0700 (PDT) Received: from p8cg001049571a15.blr.arm.com (usa-sjc-mx-foss1.foss.arm.com [217.140.101.70]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 14C673F5C1; Sat, 4 May 2019 21:15:17 -0700 (PDT) From: Anshuman Khandual To: linux-arm-kernel@lists.infradead.org Subject: [PATCH] arm64/mm: Identify user instruction aborts Date: Sun, 5 May 2019 09:45:12 +0530 Message-Id: <1557029712-3237-1-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190504_211526_591910_1C07C5E9 X-CRM114-Status: GOOD ( 12.42 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Catalin Marinas , Will Deacon , Anshuman Khandual MIME-Version: 1.0 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 We don't currently set the FAULT_FLAG_INSTRUCTION mm flag for EL0 instruction aborts. This has no functional impact, as we don't override arch_vma_access_permitted(), and the default implementation always returns true. However, it would be helpful to provide the flag so that it can be consumed by tracepoints such as dax_pmd_fault. This patch sets the FAULT_FLAG_INSTRUCTION flag for EL0 instruction aborts. Signed-off-by: Anshuman Khandual Cc: Catalin Marinas Cc: Will Deacon Cc: Mark Rutland --- arch/arm64/mm/fault.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c index 1a7e92a..b641449 100644 --- a/arch/arm64/mm/fault.c +++ b/arch/arm64/mm/fault.c @@ -463,6 +463,7 @@ static int __kprobes do_page_fault(unsigned long addr, unsigned int esr, if (is_el0_instruction_abort(esr)) { vm_flags = VM_EXEC; + mm_flags |= FAULT_FLAG_INSTRUCTION; } else if ((esr & ESR_ELx_WNR) && !(esr & ESR_ELx_CM)) { vm_flags = VM_WRITE; mm_flags |= FAULT_FLAG_WRITE; -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel