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, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable 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 DC561C47423 for ; Fri, 2 Oct 2020 13:51:08 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 5AF78206E3 for ; Fri, 2 Oct 2020 13:51:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5AF78206E3 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id BF16D6B005D; Fri, 2 Oct 2020 09:51:07 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id BA31D6B0068; Fri, 2 Oct 2020 09:51:07 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A9236900002; Fri, 2 Oct 2020 09:51:07 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0212.hostedemail.com [216.40.44.212]) by kanga.kvack.org (Postfix) with ESMTP id 7D9CE6B005D for ; Fri, 2 Oct 2020 09:51:07 -0400 (EDT) Received: from smtpin26.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 0D21C181AE878 for ; Fri, 2 Oct 2020 13:51:07 +0000 (UTC) X-FDA: 77327121774.26.pigs48_2a0ea6e271a4 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin26.hostedemail.com (Postfix) with ESMTP id D8EE71804B654 for ; Fri, 2 Oct 2020 13:51:06 +0000 (UTC) X-HE-Tag: pigs48_2a0ea6e271a4 X-Filterd-Recvd-Size: 2547 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf32.hostedemail.com (Postfix) with ESMTP for ; Fri, 2 Oct 2020 13:51:06 +0000 (UTC) Received: from gaia (unknown [95.149.105.49]) (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 1C1D7206DB; Fri, 2 Oct 2020 13:51:02 +0000 (UTC) Date: Fri, 2 Oct 2020 14:51:00 +0100 From: Catalin Marinas To: Andrey Konovalov Cc: Dmitry Vyukov , Vincenzo Frascino , kasan-dev@googlegroups.com, Andrey Ryabinin , Alexander Potapenko , Marco Elver , Evgenii Stepanov , Elena Petrova , Branislav Rankov , Kevin Brodsky , Will Deacon , Andrew Morton , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v4 24/39] arm64: mte: Add in-kernel MTE helpers Message-ID: <20201002135100.GE7034@gaia> References: <96d3ade8c6e050fefc597531fa2889e67ed75349.1601593784.git.andreyknvl@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <96d3ade8c6e050fefc597531fa2889e67ed75349.1601593784.git.andreyknvl@google.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Fri, Oct 02, 2020 at 01:10:25AM +0200, Andrey Konovalov wrote: > From: Vincenzo Frascino > > Provide helper functions to manipulate allocation and pointer tags for > kernel addresses. > > Low-level helper functions (mte_assign_*, written in assembly) operate > tag values from the [0x0, 0xF] range. High-level helper functions > (mte_get/set_*) use the [0xF0, 0xFF] range to preserve compatibility > with normal kernel pointers that have 0xFF in their top byte. > > MTE_GRANULE_SIZE and related definitions are moved to mte-def.h header > that doesn't have any dependencies and is safe to include into any > low-level header. > > Signed-off-by: Vincenzo Frascino > Co-developed-by: Andrey Konovalov > Signed-off-by: Andrey Konovalov Reviewed-by: Catalin Marinas