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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 223E8C76195 for ; Wed, 15 Mar 2023 05:14:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230336AbjCOFOv (ORCPT ); Wed, 15 Mar 2023 01:14:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47846 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229666AbjCOFOt (ORCPT ); Wed, 15 Mar 2023 01:14:49 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B629E1ACFF; Tue, 14 Mar 2023 22:14:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=X05vtzdRVOUEmVQt9LM7AcBEpxNUJlW1nSjcvx+k4II=; b=ZBRpDJQfOF7dP3sJ9sUGQlY4E8 Wd8C+NXeZORB60wcJXsshX0L6WAkHB4NpK9zDfaQqAbYw0JJZV7N07uJp2EomGOpgBy9gfRTk3lg/ Ox+YILpn/XDq0gn2XR8EhTlSWztyzXp+irDBpVS7R1MHTA27ryXzwUjDzLAKIYJHTKC6TAFQ2fg4Y T6A23P2KcdW4SSUO2o3P5VaPVXw2jTWXijCa5fiXyZPotPa67xVomAze7tB4zplYixC4Od/95hGLo LRn3w1db8qtNliXIYmFz7fWIJWpYeRWP3KCroHCN4OLdSxm/wTND17EAjE+rBnFJebCCC+nEBhkqD K7FsR6Tg==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1pcJTK-00DYB3-SQ; Wed, 15 Mar 2023 05:14:46 +0000 From: "Matthew Wilcox (Oracle)" To: linux-arch@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Mike Rapoport Subject: [PATCH v4 05/36] mm: Add default definition of set_ptes() Date: Wed, 15 Mar 2023 05:14:13 +0000 Message-Id: <20230315051444.3229621-6-willy@infradead.org> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20230315051444.3229621-1-willy@infradead.org> References: <20230315051444.3229621-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-arch@vger.kernel.org Most architectures can just define set_pte() and PFN_PTE_SHIFT to use this definition. It's also a handy spot to document the guarantees provided by the MM. Suggested-by: Mike Rapoport (IBM) Signed-off-by: Matthew Wilcox (Oracle) --- include/linux/pgtable.h | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index c5a51481bbb9..a755fe94b4b4 100644 --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -172,6 +172,43 @@ static inline int pmd_young(pmd_t pmd) } #endif +#ifndef set_ptes +#ifdef PFN_PTE_SHIFT +/** + * set_ptes - Map consecutive pages to a contiguous range of addresses. + * @mm: Address space to map the pages into. + * @addr: Address to map the first page at. + * @ptep: Page table pointer for the first entry. + * @pte: Page table entry for the first page. + * @nr: Number of pages to map. + * + * May be overridden by the architecture, or the architecture can define + * set_pte() and PFN_PTE_SHIFT. + * + * Context: The caller holds the page table lock. The pages all belong + * to the same folio. The PTEs are all in the same PMD. + */ +static inline void set_ptes(struct mm_struct *mm, unsigned long addr, + pte_t *ptep, pte_t pte, unsigned int nr) +{ + page_table_check_ptes_set(mm, addr, ptep, pte, nr); + + for (;;) { + set_pte(ptep, pte); + if (--nr == 0) + break; + ptep++; + pte = __pte(pte_val(pte) + (1UL << PFN_PTE_SHIFT)); + } +} +#ifndef set_pte_at +#define set_pte_at(mm, addr, ptep, pte) set_ptes(mm, addr, ptep, pte, 1) +#endif +#endif +#else +#define set_pte_at(mm, addr, ptep, pte) set_ptes(mm, addr, ptep, pte, 1) +#endif + #ifndef __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS extern int ptep_set_access_flags(struct vm_area_struct *vma, unsigned long address, pte_t *ptep, -- 2.39.2