From nobody Mon Feb 9 16:33:34 2026 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 07F2BEB64DA for ; Mon, 10 Jul 2023 20:46:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233384AbjGJUqk (ORCPT ); Mon, 10 Jul 2023 16:46:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50132 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232752AbjGJUpE (ORCPT ); Mon, 10 Jul 2023 16:45:04 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 73ACFE7C; Mon, 10 Jul 2023 13:43:59 -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=MleiOB+O8ZU6a0dknzCAyzLly2run5bVw1iBj0akiwE=; b=hOrOl8ZD1/O2pyYUqReAOMC00Z Ieo+CK8byYZFLkPXVV02AsvgNqzM+M+5Hs5ddbEByzw4jdlmGhQdp/hYbYc0Chtr6YA7X44zkC7cb pe1kzZ6zaYXY/tk5Mknp8cFObie3KrY7PSTLOEQQfbeyPHvptTFJwVuzbRs9qu2Ux/zoeLgExVs3H qBCGNpyIdQBTjcwA8Q/IVBK/VUN1JxCd6Hmdi8nqnJI7p7gN2OpW9rnno24Xe89fsiFv+1diNHG6N fi+zCWa8Rzk4rDRFMEoz3N6WnIjgreib+8dORaFDF9C9KDTy6dgeIOpB8RoUxuYjip9hX3iORp+Xt tu/fo7mw==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1qIxjR-00EuoP-KM; Mon, 10 Jul 2023 20:43:41 +0000 From: "Matthew Wilcox (Oracle)" To: Andrew Morton Cc: "Matthew Wilcox (Oracle)" , linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Mike Rapoport Subject: [PATCH v5 06/38] mm: Add default definition of set_ptes() Date: Mon, 10 Jul 2023 21:43:07 +0100 Message-Id: <20230710204339.3554919-7-willy@infradead.org> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20230710204339.3554919-1-willy@infradead.org> References: <20230710204339.3554919-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" 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) Reviewed-by: Mike Rapoport (IBM) --- include/linux/pgtable.h | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index 5063b482e34f..22f48f9997d5 100644 --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -180,6 +180,43 @@ static inline int pmd_young(pmd_t pmd) } #endif =20 +#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 =3D=3D 0) + break; + ptep++; + pte =3D __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, --=20 2.39.2