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=-7.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=no 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 1C481C433E2 for ; Fri, 4 Sep 2020 10:43:44 +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 D614D2087C for ; Fri, 4 Sep 2020 10:43:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="Ki8w7BOg" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D614D2087C 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+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: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=2hGFVRfmuJeisaiuD8m+iGFzPb4Cm/yMgFtsruCbeqc=; b=Ki8w7BOgbQvT3JY4DI6qf7g6Rz lMslHkLjHtHTYFRg9htSlU9cuFqtASDqlpE5O/dVED+LzdWNv7d+yGrvurkZcpe1ZshZ+2wOw+u70 gujRI6N/ngZc6aRKsL01B9HQWKS2bjhxElUfPIVnbtd3B9oViZXyTsJIy4h9pLpKLTOM88sRvf3zT rqeksy9UHfR1huq1Rq8CNA3TV8WScgJ/EWxkrH5xgSwuLkvm6tkHdzTF/X3AV0DcU/RFATsKJL/RK BJPpazHicVGCaI9S9NDpAmdMfllWjjae+uV9MOHQ/x2FLL1njG3MGx+efTMrnz1gHCXgi4gq056TN JarGTB3A==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kE9Ap-0002to-Bp; Fri, 04 Sep 2020 10:42:27 +0000 Received: from foss.arm.com ([217.140.110.172]) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kE9Al-0002sq-Ub for linux-arm-kernel@lists.infradead.org; Fri, 04 Sep 2020 10:42:25 +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 7407E101E; Fri, 4 Sep 2020 03:42:22 -0700 (PDT) Received: from a077416.arm.com (unknown [10.57.5.177]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 4AD863F66F; Fri, 4 Sep 2020 03:42:19 -0700 (PDT) From: Amit Daniel Kachhap To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v6 0/6] arm64: add Armv8.3 pointer authentication enhancements Date: Fri, 4 Sep 2020 16:12:03 +0530 Message-Id: <20200904104209.32385-1-amit.kachhap@arm.com> X-Mailer: git-send-email 2.17.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200904_064224_079665_64A41079 X-CRM114-Status: GOOD ( 13.89 ) 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 , Suzuki K Poulose , Catalin Marinas , Mark Brown , James Morse , Amit Daniel Kachhap , Vincenzo Frascino , Will Deacon , Dave Martin 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+linux-arm-kernel=archiver.kernel.org@lists.infradead.org These patch series adds support for Armv8.3 pointer authentication enhanced features mandatory for Armv8.6 and optional for Armv8.3. These features are, * Enhanced PAC generation algorithm (ARMv8.3-pauth2). * Generate fault when authenticate instruction fails (ARMV8.3-FPAC). More details can be found here [1]. Changes since v5 [2]: * Few Comments modified as suggested by Dave and Suzuki. * Added Reviewed-by's. Changes since v4 [3]: * New patch "arm64: kprobe: add checks for ARMv8.3-PAuth combined instructions". This fixes uprobe crash with ARMv8.3-PAuth combined instructions. * New patch "arm64: traps: Allow force_signal_inject to pass esr error code". This is preparatory patch for ARMV8.3-FPAC fault exception handling. * Removed caching of bootcpu address authentication cpufeature levels in static variables. This was suggested by Dave and Suzuki. * Use existing force_signal_inject function to invoke ptrauth fault signal as suggested by Dave. * Commit log changes. Changes since v3 [4]: * Added a new patch "arm64: kprobe: clarify the comment of steppable hint instructions" as suggested in the last iteration. * Removed the ptrauth fault handler from el0 compat handler as pointed by Dave. * Mentioned the new feature name clearly as ARMV8.3-FPAC and ARMv8.3-pauth2 as per ARMv8-A reference manual. * Commit logs cleanup. Changes since v2 [5]: * Dropped the patch "arm64: cpufeature: Fix the handler for address authentication" * Added new matching function for address authentication as generic matching function has_cpuid_feature is specific for LOWER_SAFE features. This was suggested by Suzuki [3]. * Disabled probe of Authenticate ptrauth instructions as per Mark Brown's merged changes of whitelisting of hint instructions. This series is based on kernel version v5.9-rc3. Regards, Amit [1]: https://community.arm.com/developer/ip-products/processors/b/processors-ip-blog/posts/arm-architecture-developments-armv8-6-a [2]: https://lore.kernel.org/linux-arm-kernel/1597734671-23407-1-git-send-email-amit.kachhap@arm.com/ [3]: http://lists.infradead.org/pipermail/linux-arm-kernel/2020-July/584393.html [4]: https://lore.kernel.org/linux-arm-kernel/1592457029-18547-1-git-send-email-amit.kachhap@arm.com/ [5]: http://lists.infradead.org/pipermail/linux-arm-kernel/2020-April/723751.html Amit Daniel Kachhap (6): arm64: kprobe: add checks for ARMv8.3-PAuth combined instructions arm64: traps: Allow force_signal_inject to pass esr error code arm64: ptrauth: Introduce Armv8.3 pointer authentication enhancements arm64: cpufeature: Modify address authentication cpufeature to exact arm64: kprobe: disable probe of fault prone ptrauth instruction arm64: kprobe: clarify the comment of steppable hint instructions arch/arm64/include/asm/esr.h | 4 ++- arch/arm64/include/asm/exception.h | 1 + arch/arm64/include/asm/insn.h | 12 +++++++ arch/arm64/include/asm/sysreg.h | 24 +++++++++----- arch/arm64/include/asm/traps.h | 2 +- arch/arm64/kernel/cpufeature.c | 46 +++++++++++++++++++++----- arch/arm64/kernel/entry-common.c | 21 ++++++++++++ arch/arm64/kernel/fpsimd.c | 4 +-- arch/arm64/kernel/insn.c | 20 ++++++----- arch/arm64/kernel/probes/decode-insn.c | 10 ++++-- arch/arm64/kernel/traps.c | 26 +++++++++++---- 11 files changed, 131 insertions(+), 39 deletions(-) -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel