From patchwork Wed Sep 9 14:07:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amit Daniel Kachhap X-Patchwork-Id: 11765495 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 14C05746 for ; Wed, 9 Sep 2020 14:10:07 +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 ACDA321D7D for ; Wed, 9 Sep 2020 14:10:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="MsU3mnTY" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org ACDA321D7D 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+patchwork-linux-arm=patchwork.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=6gYo+Nj7F247mn7lHwU1uTy+1QzZhVrWcLQvI3Egies=; b=MsU3mnTYRFaVUro7Xk35WiJVUI ebO9dddlM+J53NHvTarbEVEMtFtiCtlNQtxHvTWFLJA35ZR9HqhsP7OQFdxdkCksaDqr2KuzG4ub7 RzF3qyGXGKLbsDJmibmIUCqngFGrfAyR8Zk4VApMPi5Tb7ILiZ4rA5jRIwI629b6uAjH+wcTXOY7p oUVwBNfRnx7wICyIuKEjs4amsglV121ePK2Epp/w+fwKhAMsBOkiRvWcptfGGvTrLe98oEIk4CkuA N/M91+VCFDMQDCMS2umBglgVad3mupXJlkVN+i7Kd31DGh7lTFWIA+JhLhlQ8TecEnPlAEgtYkn0H ya29crAA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kG0lq-0008Ur-Uj; Wed, 09 Sep 2020 14:08:23 +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 1kG0lo-0008UO-Bp for linux-arm-kernel@lists.infradead.org; Wed, 09 Sep 2020 14:08:21 +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 5E35231B; Wed, 9 Sep 2020 07:08:17 -0700 (PDT) Received: from a077416.arm.com (unknown [10.57.14.111]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id CE6903F66E; Wed, 9 Sep 2020 07:08:12 -0700 (PDT) From: Amit Daniel Kachhap To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v7 0/6] arm64: add Armv8.3 pointer authentication enhancements Date: Wed, 9 Sep 2020 19:37:53 +0530 Message-Id: <20200909140759.4170-1-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-20200909_100820_502549_3283B633 X-CRM114-Status: GOOD ( 13.55 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [217.140.110.172 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record 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 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.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 v6 [2]: * Clubbed Ptrauth combined branch instructions as suggested by Will. Changes since v5 [3]: * Few Comments modified as suggested by Dave and Suzuki. * Added Reviewed-by's. Changes since v4 [4]: * 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 [5]: * 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 [6]: * 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]: http://lists.infradead.org/pipermail/linux-arm-kernel/2020-September/598163.html [3]: https://lore.kernel.org/linux-arm-kernel/1597734671-23407-1-git-send-email-amit.kachhap@arm.com/ [4]: http://lists.infradead.org/pipermail/linux-arm-kernel/2020-July/584393.html [5]: https://lore.kernel.org/linux-arm-kernel/1592457029-18547-1-git-send-email-amit.kachhap@arm.com/ [6]: 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 aut hentication 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 | 4 +++ 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 | 11 +++--- arch/arm64/kernel/probes/decode-insn.c | 9 +++-- arch/arm64/kernel/traps.c | 26 +++++++++++---- 11 files changed, 114 insertions(+), 38 deletions(-)