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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E544DC88E4D for ; Fri, 11 Sep 2026 17:00:47 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 0570C6B009E; Fri, 11 Sep 2026 13:00:47 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 02F8F6B009F; Fri, 11 Sep 2026 13:00:46 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E86736B00A0; Fri, 11 Sep 2026 13:00:46 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id BF17D6B009E for ; Fri, 11 Sep 2026 13:00:46 -0400 (EDT) Received: from smtpin04.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay02.hostedemail.com (Postfix) with ESMTP id 426991202E5 for ; Fri, 11 Sep 2026 17:00:46 +0000 (UTC) X-FDA: 85202095692.04.1C03F82 Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf05.hostedemail.com (Postfix) with ESMTP id 5CA3510000F for ; Fri, 11 Sep 2026 17:00:44 +0000 (UTC) Authentication-Results: imf05.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=dqzLbr7P; spf=pass (imf05.hostedemail.com: domain of david@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=david@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1789146044; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=SDhdb+1yueFGYCfGv2/iY4/JhNsnY4MHmhr2o01xj7U=; b=dgKvcLPSDG0mDRzTNvweR/ttb65SyjbHF4LM6zVwRd8D1S0fDuY/p4HmEBM5U74EVh8asx QT1/y2wod6RNPdFS9DH078qTIrsEFP+BTs+Xn9wDX4dQ+QIE9bApt4yGgNRHT2Q4w/MftR Zs9KV2NwaH6ZzMhZy0svlvncnhcrTi8= ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1789146044; b=TA+DUd1flOL1mZRV/Ka+riUZPG7XRsbNtoXFuPha7PZpekX4l++NcfhXvQSXICYMaid2Gu j6e74wcg6if45eGXw3Q5yZHTrjbOhycyvVnRA6u8+6nUCzQkNgfsCaXy4nOnkFLazLiOZg /2v+Moaj3y5qwASO4DbVjAqdcxjGj18= ARC-Authentication-Results: i=1; imf05.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=dqzLbr7P; spf=pass (imf05.hostedemail.com: domain of david@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=david@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 718C64376E; Fri, 11 Sep 2026 17:00:43 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 803B11F000FF; Fri, 11 Sep 2026 17:00:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789146043; bh=SDhdb+1yueFGYCfGv2/iY4/JhNsnY4MHmhr2o01xj7U=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=dqzLbr7PT9UPg2vyaVcVWkqDnTJLnNl/+9rbrIO5j+Xc/wJPxcpDAZtHGb0O5p3wx xxwXDj+5wfoXizGaX4IUDbtQjoGNGIBmbFh9r+Ih/Swh0lmJo1x2rXjXAotQlrIA5i 8CALl0IKEmojHmvftuOoofMkLRwZj2jPgwYN/P9EP0Ge2Yy2o0vx9O1Tc9LnRc7d8a ECioA+6R8JEa+dnDWQvYkyKqpHAO81tDbTlKvOLsbaMVoBHTGt5Y2bsOxTUhPmn5m/ bZSIlx+oLSNnrcP6gkKiSYENsTC+1lLLRiHh3dEhvB47zpFmLxPKtk1t4g8IwsgehU sPQt4Xy2dY91w== Message-ID: Date: Fri, 11 Sep 2026 19:00:24 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/8] mm: introduce hw_pte_t for PTE table storage To: Muhammad Usama Anjum , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , David Airlie , Simona Vetter , Dimitri Sivanich , Arnd Bergmann , Greg Kroah-Hartman , "James E.J. Bottomley" , Helge Deller , Juergen Gross , Stefano Stabellini , Muchun Song , Oscar Salvador , Andrew Morton , "Liam R. Howlett" , Lorenzo Stoakes , Will Deacon , "Aneesh Kumar K.V" , Nick Piggin , Peter Zijlstra , Andrey Ryabinin , Pasha Tatashin , Chris Li , Kairui Song , Uladzislau Rezki , Steven Rostedt , Masami Hiramatsu , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Eduard Zingerman , Kumar Kartikeya Dwivedi , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , SJ Park , "Matthew Wilcox (Oracle)" , Jan Kara , Jason Gunthorpe , Leon Romanovsky , Miaohe Lin , Dennis Zhou , Tejun Heo , Christoph Lameter , Mike Rapoport , Johannes Weiner , ziy@nvidia.com, pfalcato@suse.de, agordeev@linux.ibm.com, ryan.roberts@arm.com Cc: linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-parisc@vger.kernel.org, xen-devel@lists.xenproject.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-arch@vger.kernel.org, kasan-dev@googlegroups.com, linux-trace-kernel@vger.kernel.org, bpf@vger.kernel.org, linux-perf-users@vger.kernel.org, damon@lists.linux.dev References: <20260903103002.1091859-1-usama.anjum@arm.com> <20260903103002.1091859-2-usama.anjum@arm.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 5CA3510000F X-Stat-Signature: kf67jgmgton8pijimtwjeansw6etaqbr X-Rspam-User: X-HE-Tag: 1789146044-792604 X-HE-Meta: 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 k2P1VY/I s1jf3BLQ2ZbZXQj3MJgUhKmOFcYMDufDtCyoF3Dk0Mx+JSiNKqxgOjdjvOLqnqzrB8sy4lUSEaOFUEqnRgk/ES8D8to0uSpKKleXyavGBz5nmTut5M5B28OW3srgtgHw3ESQpTniE6oTZE/VCSWPG8GjiwW9No2OmB5gPaTEYSnyvzxHpkDTploW+8TAhk8H/0327FttfEC3Dyw7Pz+CSEs41YKeuwlua20b5+cshfNRlD/aFNAn+CeCH4vn5oupQWFhQg1zGGbNaUdf9zS0n8FrNz4tk/8+E5vHl+6OfICXNAB947YUj+2UQ3trru1wyTlvioM0rFYBGCeguGyv0UbVyXflRbFiqpKaU28OUfCPQw54l1TrimArkpp5rNGalGXTnW/tJr7OZ7Oh8eQ3G/qiKf+yY5FBqdD5qxWWqIiWp42r9wkwvR/N8kk2JqWAIeKjiHJrRNPM4x+RfrER3EzYyxw== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 9/3/26 12:29, Muhammad Usama Anjum wrote: > pte_t is used both for software PTE values and for entries stored in a PTE > table, so pte_t * does not distinguish a pointer to a software PTE > value from a pointer to table storage. > > Introduce hw_pte_t as the generic name for a PTE table element. Define it > as a macro alias of pte_t by default. When an architecture selects > ARCH_HAS_HW_PTE_T, define it as a structure containing a pte_t instead. > This preserves the representation while allowing converted architectures > to enforce the distinction at compile time. > > Name the generic wrapper structure __hw_pte_t so architectures can > forward-declare it when pgtable_t must be defined before the generic > hw_pte_t typedef is visible. This avoids header-order dependencies. > > Keep the C type definitions behind an __ASSEMBLY__ check because > architecture assembly sources can include this header indirectly. Include > asm/page.h so consumers such as linux/vmalloc.h retain the page definitions > they previously obtained from that header. > > Signed-off-by: Muhammad Usama Anjum > --- Acked-by: David Hildenbrand (Arm) -- Cheers, David