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]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6D17DC369D5 for ; Mon, 28 Apr 2025 12:05:12 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id B12A56B000A; Mon, 28 Apr 2025 08:05:10 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id AC4F46B0029; Mon, 28 Apr 2025 08:05:10 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 967146B00AF; Mon, 28 Apr 2025 08:05:10 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 71D9D6B000A for ; Mon, 28 Apr 2025 08:05:10 -0400 (EDT) Received: from smtpin10.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id 63544141477 for ; Mon, 28 Apr 2025 12:05:11 +0000 (UTC) X-FDA: 83383322022.10.E168189 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by imf23.hostedemail.com (Postfix) with ESMTP id BD582140012 for ; Mon, 28 Apr 2025 12:05:09 +0000 (UTC) Authentication-Results: imf23.hostedemail.com; dkim=none; spf=pass (imf23.hostedemail.com: domain of dev.jain@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=dev.jain@arm.com; dmarc=pass (policy=none) header.from=arm.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1745841909; 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-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=XS3+A4YF9jFlQhCbMVUw4bYPRQL/1ezEMDDEfM85mB0=; b=WtctHn/Fru6ymcGg5Jy964gmbbx+9RXHUNk7IUKUwA9l2JZDwtZWi0gU09wPm1koqmA6/Z OPoTxdccy+NCZ7eXBvE9m8ikeG8Z+UmJ2K2/NhGLj+qfcCtla4oen19wu1JKD1owyrrt13 pJvxp5MDSF2eXVOp6ojlW+1z0C06ASI= ARC-Authentication-Results: i=1; imf23.hostedemail.com; dkim=none; spf=pass (imf23.hostedemail.com: domain of dev.jain@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=dev.jain@arm.com; dmarc=pass (policy=none) header.from=arm.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1745841909; a=rsa-sha256; cv=none; b=YAFiJSXuQ2Yoqbe4dej6I7VrSl85bsCFwK+4HF86y2lAlaFqImP/hUiTHHo6kTaVUV9Ei9 RmeGmwPVar6TFXByWHwtzbKEIIvRaUixiwFTDNexO0MwYOZRWEY3ZmM+MkdG+Z43K1jc9O IcIdUziwv/5FLf94E4wUzFFPMnci8iw= 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 52ACF22BE; Mon, 28 Apr 2025 05:05:02 -0700 (PDT) Received: from K4MQJ0H1H2.arm.com (unknown [10.163.78.210]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id D26543F66E; Mon, 28 Apr 2025 05:04:58 -0700 (PDT) From: Dev Jain To: akpm@linux-foundation.org Cc: ryan.roberts@arm.com, david@redhat.com, willy@infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, catalin.marinas@arm.com, will@kernel.org, Liam.Howlett@oracle.com, lorenzo.stoakes@oracle.com, vbabka@suse.cz, jannh@google.com, anshuman.khandual@arm.com, peterx@redhat.com, joey.gouly@arm.com, ioworker0@gmail.com, baohua@kernel.org, kevin.brodsky@arm.com, quic_zhenhuah@quicinc.com, christophe.leroy@csgroup.eu, yangyicong@hisilicon.com, linux-arm-kernel@lists.infradead.org, namit@vmware.com, hughd@google.com, yang@os.amperecomputing.com, ziy@nvidia.com, Dev Jain Subject: [PATCH 3/7] mm: Add batched versions of ptep_modify_prot_start/commit Date: Mon, 28 Apr 2025 17:34:10 +0530 Message-Id: <20250428120414.12101-4-dev.jain@arm.com> X-Mailer: git-send-email 2.39.3 (Apple Git-146) In-Reply-To: <20250428120414.12101-1-dev.jain@arm.com> References: <20250428120414.12101-1-dev.jain@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: on56d5a6g5yfwk9kfer8twh6rr8bt3ma X-Rspamd-Queue-Id: BD582140012 X-Rspam-User: X-Rspamd-Server: rspam05 X-HE-Tag: 1745841909-38599 X-HE-Meta: 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 PsGBFwYw YhlBVfEQg/E1oxVb1qBS/ucVZebR3pnEXQo4eQdF0JYSifSmHCpcHrZ0IFx1gWNMSZcAKtvug3sNourq7rl4Fzini7O1IaNhedBk9Lc3F8Bjb9SNBHIkwfiO68lK7zdSVZLWkJLP0YoZcEBai1VdIoZAHpwwHzf4+w7RLVMSDr4t8qVQOTyNbuSFz6sDE9iE6hE5ihEcj42A6OkI= 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: Batch ptep_modify_prot_start/commit in preparation for optimizing mprotect. Architecture can override these helpers. Signed-off-by: Dev Jain --- include/linux/pgtable.h | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index b50447ef1c92..ed287289335f 100644 --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -891,6 +891,44 @@ static inline void wrprotect_ptes(struct mm_struct *mm, unsigned long addr, } #endif +/* See the comment for ptep_modify_prot_start */ +#ifndef modify_prot_start_ptes +static inline pte_t modify_prot_start_ptes(struct vm_area_struct *vma, + unsigned long addr, pte_t *ptep, unsigned int nr) +{ + pte_t pte, tmp_pte; + + pte = ptep_modify_prot_start(vma, addr, ptep); + while (--nr) { + ptep++; + addr += PAGE_SIZE; + tmp_pte = ptep_modify_prot_start(vma, addr, ptep); + if (pte_dirty(tmp_pte)) + pte = pte_mkdirty(pte); + if (pte_young(tmp_pte)) + pte = pte_mkyoung(pte); + } + return pte; +} +#endif + +/* See the comment for ptep_modify_prot_commit */ +#ifndef modify_prot_commit_ptes +static inline void modify_prot_commit_ptes(struct vm_area_struct *vma, unsigned long addr, + pte_t *ptep, pte_t old_pte, pte_t pte, unsigned int nr) +{ + for (;;) { + ptep_modify_prot_commit(vma, addr, ptep, old_pte, pte); + if (--nr == 0) + break; + ptep++; + addr += PAGE_SIZE; + old_pte = pte_next_pfn(old_pte); + pte = pte_next_pfn(pte); + } +} +#endif + /* * On some architectures hardware does not set page access bit when accessing * memory page, it is responsibility of software setting this bit. It brings -- 2.30.2