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=-5.3 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,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 D0FD9C33CAF for ; Thu, 16 Jan 2020 18:42:14 +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 A42772077B for ; Thu, 16 Jan 2020 18:42:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="tuaF58es" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A42772077B 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: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=qRKDCsbGH/Ta+eDBq1ATsXgpSfBmW8owy2HlC7HV9C4=; b=tuaF58esvkkHyW +o+NvHpvggt0wflPleUtrOVMzmJye8K++h/OweWYtUEpdV37/igkm/6i3ezgCJFlmxTc+wyjbri3/ 9S5x4EZG3RSTPXfG8bT6pPK4wb8aN/6l85Bkokz03xtDDeP6qp1LkS4DIGSKkJqH4OvOWcJvkNgzL f9FhDu8PorrmCCz5KMWjRQpVyDPP0YohdCcim9gCpNwf7FEAYWDi+jJueblaK/UfA6W4t8YQwnloE ymmPGk/zlH+9yHV6gwY58G/hKhTZK2CxLenl+255bKTfJSiNwPkVzY03hc8cemk9b7veOJhkZnNhJ HTCG7YvMaiXc6JC8vapA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1isA5t-0004tA-5F; Thu, 16 Jan 2020 18:42:13 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1is9Rq-000650-J1 for linux-arm-kernel@lists.infradead.org; Thu, 16 Jan 2020 18:00:56 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id CA1BB31B; Thu, 16 Jan 2020 10:00:49 -0800 (PST) Received: from arrakis.emea.arm.com (arrakis.cambridge.arm.com [10.1.197.42]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 121763F534; Thu, 16 Jan 2020 10:00:47 -0800 (PST) Date: Thu, 16 Jan 2020 18:00:46 +0000 From: Catalin Marinas To: Amit Daniel Kachhap Subject: Re: [PATCH v3 07/16] arm64: initialize and switch ptrauth kernel keys Message-ID: <20200116180045.GI10277@arrakis.emea.arm.com> References: <1576486038-9899-1-git-send-email-amit.kachhap@arm.com> <1576486038-9899-8-git-send-email-amit.kachhap@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1576486038-9899-8-git-send-email-amit.kachhap@arm.com> 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-20200116_100050_736966_BA93A3A8 X-CRM114-Status: GOOD ( 10.77 ) 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 , Kees Cook , Suzuki K Poulose , Ard Biesheuvel , Richard Henderson , Kristina Martsenko , James Morse , Ramana Radhakrishnan , Mark Brown , Vincenzo Frascino , Will Deacon , Dave Martin , linux-arm-kernel@lists.infradead.org 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 On Mon, Dec 16, 2019 at 02:17:09PM +0530, Amit Daniel Kachhap wrote: > From: Kristina Martsenko > > Set up keys to use pointer authentication within the kernel. The kernel > will be compiled with APIAKey instructions, the other keys are currently > unused. Each task is given its own APIAKey, which is initialized during > fork. The key is changed during context switch and on kernel entry from > EL0. > > The keys for idle threads need to be set before calling any C functions, > because it is not possible to enter and exit a function with different > keys. > > Reviewed-by: Kees Cook > Signed-off-by: Kristina Martsenko > [Amit: Modified secondary cores key structure, comments] > Signed-off-by: Amit Daniel Kachhap Reviewed-by: Catalin Marinas _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel