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 CCC4CCCD183 for ; Thu, 16 Oct 2025 11:33:27 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 323FB8E0013; Thu, 16 Oct 2025 07:33:26 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 2D52D8E0003; Thu, 16 Oct 2025 07:33:26 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 14E0E8E0013; Thu, 16 Oct 2025 07:33:26 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id ED3AF8E0003 for ; Thu, 16 Oct 2025 07:33:25 -0400 (EDT) Received: from smtpin10.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id 8B68CB80B0 for ; Thu, 16 Oct 2025 11:33:25 +0000 (UTC) X-FDA: 84003766770.10.8079170 Received: from canpmsgout01.his.huawei.com (canpmsgout01.his.huawei.com [113.46.200.216]) by imf11.hostedemail.com (Postfix) with ESMTP id 7040240005 for ; Thu, 16 Oct 2025 11:33:21 +0000 (UTC) Authentication-Results: imf11.hostedemail.com; dkim=pass header.d=huawei.com header.s=dkim header.b=UJGB7Q6V; dmarc=pass (policy=quarantine) header.from=huawei.com; spf=pass (imf11.hostedemail.com: domain of yintirui@huawei.com designates 113.46.200.216 as permitted sender) smtp.mailfrom=yintirui@huawei.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1760614403; 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=Kl8wFEk1Rfimj4SuE/d+n0dMIexnSNg7hsR/i17e6MY=; b=PhVbVjfxIdvnZSMVdDuBZd/KP/Hsea6Hlx9T6/PzGyLBgf7dAnrgu8GcNo/nvhjNBxsjCG pygp5on+3cITKix9ad2xsFe1UuTXG4PJyBCqbl7F5kS16kBcCwcbErBvkiM8BDLJeVtuNZ 0EAxxMMmeiKsgidodIOzQiwRfptjhqk= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1760614403; a=rsa-sha256; cv=none; b=7XipLPS7ssMTAd6HxZQJ9MAoxDEQjztOgFeGP65e5XXcA8QIJope1QDTD0GZP3B7r1RjO/ 4crCgzwdf/teZ9odfNeovYsFXfsKWAeI0QR0mvqEw2IWPfXWEzMY/O1VqBfqosM8MZ+zLt v+M49Sax09u6BlX056F47l4LAGNB3uE= ARC-Authentication-Results: i=1; imf11.hostedemail.com; dkim=pass header.d=huawei.com header.s=dkim header.b=UJGB7Q6V; dmarc=pass (policy=quarantine) header.from=huawei.com; spf=pass (imf11.hostedemail.com: domain of yintirui@huawei.com designates 113.46.200.216 as permitted sender) smtp.mailfrom=yintirui@huawei.com dkim-signature: v=1; a=rsa-sha256; d=huawei.com; s=dkim; c=relaxed/relaxed; q=dns/txt; h=From; bh=Kl8wFEk1Rfimj4SuE/d+n0dMIexnSNg7hsR/i17e6MY=; b=UJGB7Q6ViWGahyodIiBXCAq88T0wmr6s2XW5a8KOiGY2DS43aoyAWx2GYUkD71tQE/3aypdjO L02ClGRAWAt0XtsJxALWDX3IfEDdg/P5w6r1gvbBzhE0cv1lFlr6Df+BVX7M8qA7vtcq6lPuOlQ MnmG8B5ppm70Ym2pVG5vDPc= Received: from mail.maildlp.com (unknown [172.19.88.194]) by canpmsgout01.his.huawei.com (SkyGuard) with ESMTPS id 4cnQmC5MPzz1T4GB; Thu, 16 Oct 2025 19:32:27 +0800 (CST) Received: from kwepemr500001.china.huawei.com (unknown [7.202.194.229]) by mail.maildlp.com (Postfix) with ESMTPS id B884C140257; Thu, 16 Oct 2025 19:33:13 +0800 (CST) Received: from huawei.com (10.50.87.63) by kwepemr500001.china.huawei.com (7.202.194.229) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Thu, 16 Oct 2025 19:33:12 +0800 From: Yin Tirui To: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , CC: , , Subject: [PATCH RFC 1/2] pgtable: add pte_clrhuge() implementation for arm64 and riscv Date: Thu, 16 Oct 2025 19:27:03 +0800 Message-ID: <20251016112704.179280-2-yintirui@huawei.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251016112704.179280-1-yintirui@huawei.com> References: <20251016112704.179280-1-yintirui@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.50.87.63] X-ClientProxiedBy: kwepems200002.china.huawei.com (7.221.188.68) To kwepemr500001.china.huawei.com (7.202.194.229) X-Rspamd-Server: rspam01 X-Stat-Signature: snm6pij4op79ig9wxxkdiptpbwwoakd5 X-Rspam-User: X-Rspamd-Queue-Id: 7040240005 X-HE-Tag: 1760614401-42871 X-HE-Meta: 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 8XdBvlaV vePYpQxxTgTv9nwHrn5Be1PsrceGt8/CgdrbDnASJeCG6AsNIOJGC2Akp56A8Los7sc5HWqxaxjxLoFN8hq2/ADP6WCCrtewZ/myMbupF41QGB7ES5Dv/Xwi4lJKxAdt719CZAIisv57uJXWfGjbOjWJiH7zbxMFpr/m+kZ23GHoNzuPNPduPhbAaqH7v3pwXYyBFI639SuO+aK4iaTdhVAK1+QZyvShZ9XBNNpKVH80MiWgUO5D1NRuO8pvEYLoUHjPSbM5yJyf2CHf1KrDDLpQWPt5N7IHNWs4+MqQLCb1mmwfeysEq8hK9uAQzYeNtFVJF1ORZYGTpdau8V+I7NmndvQ== 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: List-Subscribe: List-Unsubscribe: Add pte_clrhuge() helper function for architectures that enable ARCH_SUPPORTS_HUGE_PFNMAP to clear huge page attributes from PTE entries. This function provides the inverse operation of pte_mkhuge() and will be needed for upcoming huge page splitting, where PTE entries derived from huge page mappings need to have their huge page attributes cleared. Future work will refactor pfn_pte() to automatically filter huge bits, removing the need for pte_clrhuge() across all architectures. Signed-off-by: Yin Tirui --- arch/arm64/include/asm/pgtable.h | 8 ++++++++ arch/riscv/include/asm/pgtable.h | 5 +++++ 2 files changed, 13 insertions(+) diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index abd2dee416b3..244755bad46f 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -366,6 +366,14 @@ static inline pte_t pte_mkinvalid(pte_t pte) return pte; } +static inline pte_t pte_clrhuge(pte_t pte) +{ + pteval_t mask = PTE_TYPE_MASK & ~PTE_VALID; + pteval_t val = PTE_TYPE_PAGE & ~PTE_VALID; + + return __pte((pte_val(pte) & ~mask) | val); +} + static inline pmd_t pmd_mkcont(pmd_t pmd) { return __pmd(pmd_val(pmd) | PMD_SECT_CONT); diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index 815067742939..b0a20ddf780a 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -455,6 +455,11 @@ static inline pte_t pte_mkhuge(pte_t pte) return pte; } +static inline pte_t pte_clrhuge(pte_t pte) +{ + return pte; +} + #ifdef CONFIG_RISCV_ISA_SVNAPOT #define pte_leaf_size(pte) (pte_napot(pte) ? \ napot_cont_size(napot_cont_order(pte)) :\ -- 2.43.0