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=-8.2 required=3.0 tests=BAYES_00,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_SANE_1 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 4E33CC4741F for ; Thu, 5 Nov 2020 16:57:58 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 CFE86206F9 for ; Thu, 5 Nov 2020 16:57:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="kyLw5zRL" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CFE86206F9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+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=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:Message-ID: Subject:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=PvL138UOY+tXPWmg1XPfOYEJWdV2yMf5HrfKUJ/2skA=; b=kyLw5zRLKJ/vMexwbVsGtnP11 bB6KGxm+Q9AvwfJGC0p5aW5TC3ogG1AID8vxfODc+VQynPCzcjaAH8W99cwZWDswXQvR53wt5hz5r /S7iYOqTUY8tqFpYBv0UOvkHTeZd3Nj8DJZ9E1ByUDF7OC24y5wncg3mX88V79fnh21V7p6x19JfA BeDPUaTFq/Pw344M9eB+vuhgjwhyqcKdWQHfLotyphlKAS2uV4muaZYxjX2Df3vYmiWT1XCs5PZAt TpyjRguC+xN4zcig0brCaFrgt74+DC5AaVTkEhZ7tc9mV9ZOo2eHMYzgIAV7m+3kvN220FH2+FAkq ZHiGARBnA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kaiZr-00006O-HF; Thu, 05 Nov 2020 16:57:35 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kaiZo-00004s-M8 for linux-arm-kernel@lists.infradead.org; Thu, 05 Nov 2020 16:57:33 +0000 Received: from gaia (unknown [2.26.170.190]) (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 63169206F9; Thu, 5 Nov 2020 16:57:28 +0000 (UTC) Date: Thu, 5 Nov 2020 16:57:25 +0000 From: Catalin Marinas To: Andrey Konovalov Subject: Re: [PATCH v8 29/43] arm64: mte: Add in-kernel tag fault handler Message-ID: <20201105165724.GD30030@gaia> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201105_115732_835568_23D4475C X-CRM114-Status: GOOD ( 14.92 ) 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: linux-arm-kernel@lists.infradead.org, Marco Elver , Kevin Brodsky , Will Deacon , Branislav Rankov , kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Alexander Potapenko , Evgenii Stepanov , Andrey Ryabinin , Andrew Morton , Vincenzo Frascino , Dmitry Vyukov Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Nov 05, 2020 at 12:18:44AM +0100, Andrey Konovalov wrote: > From: Vincenzo Frascino > > Add the implementation of the in-kernel fault handler. > > When a tag fault happens on a kernel address: > * MTE is disabled on the current CPU, > * the execution continues. > > When a tag fault happens on a user address: > * the kernel executes do_bad_area() and panics. > > The tag fault handler for kernel addresses is currently empty and will be > filled in by a future commit. > > Signed-off-by: Vincenzo Frascino > Co-developed-by: Andrey Konovalov > Signed-off-by: Andrey Konovalov Reviewed-by: Catalin Marinas _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel