From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on archive.lwn.net X-Spam-Level: X-Spam-Status: No, score=-5.7 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI,SPF_HELO_NONE,SPF_NONE autolearn=ham autolearn_force=no version=3.4.2 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by archive.lwn.net (Postfix) with ESMTP id C45DD7D2F0 for ; Wed, 7 Aug 2019 15:53:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388802AbfHGPx1 (ORCPT ); Wed, 7 Aug 2019 11:53:27 -0400 Received: from foss.arm.com ([217.140.110.172]:50660 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388779AbfHGPx1 (ORCPT ); Wed, 7 Aug 2019 11:53:27 -0400 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 92B60344; Wed, 7 Aug 2019 08:53:26 -0700 (PDT) Received: from arrakis.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.121.207.14]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 3CD9C3F706; Wed, 7 Aug 2019 08:53:25 -0700 (PDT) From: Catalin Marinas To: linux-arm-kernel@lists.infradead.org Cc: Vincenzo Frascino , Will Deacon , Andrey Konovalov , Szabolcs Nagy , Kevin Brodsky , linux-doc@vger.kernel.org, linux-arch@vger.kernel.org, Dave Hansen Subject: [PATCH v7 0/2] arm64 tagged address ABI Date: Wed, 7 Aug 2019 16:53:19 +0100 Message-Id: <20190807155321.9648-1-catalin.marinas@arm.com> X-Mailer: git-send-email 2.23.0.rc0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org Hi, Thanks for the feedback so far. This is an updated series documenting the AArch64 Tagged Address ABI as implemented by these patches: http://lkml.kernel.org/r/cover.1563904656.git.andreyknvl@google.com Version 6 of the documentation series is available here: http://lkml.kernel.org/r/20190725135044.24381-1-vincenzo.frascino@arm.com Changes in v7: - Dropped the MAP_PRIVATE requirements for tagged pointers for both anonymous and file mappings. One reason is that we can't enforce such restriction anyway. The other reason is that a future series implementing support for the hardware MTE will detect incompatibilities of the new PROT_MTE flag with various mmap() options. - As a consequence of the above, I removed Szabolcs ack as I'm not sure he's ok with the change. - Clarified the sysctl and prctl() interaction and reordered the descriptions. - Reworded the prctl(PR_SET_MM) restrictions. - Removed the description of the tag preservation from the first patch as it didn't really make sense (the syscall ABI has always preserved all registers other than x0 on return to user). - s/ARM64/AArch64/ for consistency with the tagged-pointers.rst document. - Other minor rewordings. Vincenzo Frascino (2): arm64: Define Documentation/arm64/tagged-address-abi.rst arm64: Relax Documentation/arm64/tagged-pointers.rst Documentation/arm64/tagged-address-abi.rst | 151 +++++++++++++++++++++ Documentation/arm64/tagged-pointers.rst | 23 +++- 2 files changed, 167 insertions(+), 7 deletions(-) create mode 100644 Documentation/arm64/tagged-address-abi.rst