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a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1745904263; 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=kJy3Q9sBi7J6fINWXozBy6/pk0w4nvZeZxoVkztD/yVhQMCucaQ1wwQ9xTfmfeE3krZtUt 068dAHYYRJYQva+iQAjyU5a15TQ9UrPkkG9DUbSZIfftfwkv+umR2u3ajb8jiUr0yNyzMk 5bQae2GbSKXUFq+1Hy0RAaIdAh/rZHc= 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 609C31515; Mon, 28 Apr 2025 22:24:15 -0700 (PDT) Received: from K4MQJ0H1H2.arm.com (unknown [10.163.78.253]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 6D4633F5A1; Mon, 28 Apr 2025 22:24:12 -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 v2 3/7] mm: Add batched versions of ptep_modify_prot_start/commit Date: Tue, 29 Apr 2025 10:53:32 +0530 Message-Id: <20250429052336.18912-4-dev.jain@arm.com> X-Mailer: git-send-email 2.39.3 (Apple Git-146) In-Reply-To: <20250429052336.18912-1-dev.jain@arm.com> References: <20250429052336.18912-1-dev.jain@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Queue-Id: DF1A212000A X-Rspamd-Server: rspam04 X-Stat-Signature: maw1dq6gcgqqscpaqggcqzbh81kgnbo9 X-HE-Tag: 1745904262-437537 X-HE-Meta: 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 BLs6VuJu pKpZhp2CtwI+GvAJmtkPPLpxNeib5Qp5dycZ2HL0cLwHo5S1f0ukn+eRbiLK/ZSIgbwwc04/21lMEiLSJqctaLMSBz7T+gsv0S+pYPk3AoZ5YDBgCSWA5317CfKkGd6vCrwdQboeCdYFCAzgWA9WArkjuEggKJYbA6Mldd84N8R1zTH4YAbcMPng2REwUfD7qxDyLDlyfxMR8JqQ= 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