From patchwork Tue May 10 11:12:52 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Baolin Wang X-Patchwork-Id: 12844875 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id EDC81C433EF for ; Tue, 10 May 2022 11:14:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=iNzgr3VYF5y9CvXC2R8ezxqVbUgZ85N2FqVQO5SA1z8=; b=gfSkIYoNdN91zz dU7oAlQJF0wnm3fCyXbdpxpVC54vYaCrFG5LDq75QXYhvQYbxjUvLzDj3gVuId0V3VAgVroiGoLGi v7FqvvPQz59i+TJYnDppn0dWzbILRpUz1+nPpOZthb+5NdaNkVy3/e/xziujjJFf0j0C20vgHZ8hz FIMRQESXDid389CZcOfe7kJYv8B/iOYB71L8qFNf7YYeZvrTzWNuMjbXEP4cWoL/oXtEd6LAhgbXJ t7DvbemcKEvz8fFZKFdHbheFA+vKS5leCR3FYZMg9wjvr7x1MpoG1A1BTLVrVTY8OllM1Pan1p1nM LSiAryGNS2eMwr2oH6oQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1noNoO-001SKr-0X; Tue, 10 May 2022 11:13:52 +0000 Received: from out30-44.freemail.mail.aliyun.com ([115.124.30.44]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1noNnm-001S3k-E3 for linux-arm-kernel@lists.infradead.org; Tue, 10 May 2022 11:13:17 +0000 X-Alimail-AntiSpam: AC=PASS; BC=-1|-1; BR=01201311R431e4; CH=green; DM=||false|; DS=||; FP=0|-1|-1|-1|0|-1|-1|-1; HT=e01e04395; MF=baolin.wang@linux.alibaba.com; NM=1; PH=DS; RN=12; SR=0; TI=SMTPD_---0VCr6xlO_1652181186; Received: from localhost(mailfrom:baolin.wang@linux.alibaba.com fp:SMTPD_---0VCr6xlO_1652181186) by smtp.aliyun-inc.com(127.0.0.1); Tue, 10 May 2022 19:13:06 +0800 From: Baolin Wang To: catalin.marinas@arm.com, will@kernel.org, mike.kravetz@oracle.com, akpm@linux-foundation.org Cc: songmuchun@bytedance.com, willy@infradead.org, anshuman.khandual@arm.com, christophe.leroy@csgroup.eu, baolin.wang@linux.alibaba.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 1/2] arm64/hugetlb: Use ptep_get() to get the pte value of a huge page Date: Tue, 10 May 2022 19:12:52 +0800 Message-Id: <6aabddaf4cae5ae2205c3a7df9b9e15dbd61b641.1652180088.git.baolin.wang@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: References: In-Reply-To: References: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220510_041314_702362_33A41B36 X-CRM114-Status: GOOD ( 13.18 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The original huge_ptep_get() on ARM64 is just a wrapper of ptep_get(), which will not take into account any contig-PTEs dirty and access bits. Meanwhile we will implement a new ARM64-specific huge_ptep_get() interface in following patch, which will take into account any contig-PTEs dirty and access bits and only be allowed to pass the head pte of a contig-PTE/PMD size page. Thus change to use ptep_get() to get the pte value of a huge page as a preparation. Signed-off-by: Baolin Wang Reviewed-by: Muchun Song --- arch/arm64/mm/hugetlbpage.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c index ca8e65c..be5e2f3 100644 --- a/arch/arm64/mm/hugetlbpage.c +++ b/arch/arm64/mm/hugetlbpage.c @@ -172,7 +172,7 @@ static pte_t get_clear_flush(struct mm_struct *mm, unsigned long pgsize, unsigned long ncontig) { - pte_t orig_pte = huge_ptep_get(ptep); + pte_t orig_pte = ptep_get(ptep); bool valid = pte_valid(orig_pte); unsigned long i, saddr = addr; @@ -385,7 +385,7 @@ pte_t huge_ptep_get_and_clear(struct mm_struct *mm, { int ncontig; size_t pgsize; - pte_t orig_pte = huge_ptep_get(ptep); + pte_t orig_pte = ptep_get(ptep); if (!pte_cont(orig_pte)) return ptep_get_and_clear(mm, addr, ptep); @@ -408,11 +408,11 @@ static int __cont_access_flags_changed(pte_t *ptep, pte_t pte, int ncontig) { int i; - if (pte_write(pte) != pte_write(huge_ptep_get(ptep))) + if (pte_write(pte) != pte_write(ptep_get(ptep))) return 1; for (i = 0; i < ncontig; i++) { - pte_t orig_pte = huge_ptep_get(ptep + i); + pte_t orig_pte = ptep_get(ptep + i); if (pte_dirty(pte) != pte_dirty(orig_pte)) return 1;