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 X-Spam-Level: X-Spam-Status: No, score=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 17F51C169C4 for ; Tue, 12 Feb 2019 02:59:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E5E6F2186A for ; Tue, 12 Feb 2019 02:59:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728202AbfBLC7s (ORCPT ); Mon, 11 Feb 2019 21:59:48 -0500 Received: from mx1.redhat.com ([209.132.183.28]:59362 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726864AbfBLC7r (ORCPT ); Mon, 11 Feb 2019 21:59:47 -0500 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 413F3C06C9F8; Tue, 12 Feb 2019 02:59:47 +0000 (UTC) Received: from xz-x1.nay.redhat.com (dhcp-14-116.nay.redhat.com [10.66.14.116]) by smtp.corp.redhat.com (Postfix) with ESMTP id 10907600C6; Tue, 12 Feb 2019 02:59:35 +0000 (UTC) From: Peter Xu To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: David Hildenbrand , Hugh Dickins , Maya Gokhale , Jerome Glisse , Pavel Emelyanov , Johannes Weiner , peterx@redhat.com, Martin Cracauer , Shaohua Li , Marty McFadden , Andrea Arcangeli , Mike Kravetz , Denis Plotnikov , Mike Rapoport , Mel Gorman , "Kirill A . Shutemov" , "Dr . David Alan Gilbert" Subject: [PATCH v2 16/26] userfaultfd: wp: add pmd_swp_*uffd_wp() helpers Date: Tue, 12 Feb 2019 10:56:22 +0800 Message-Id: <20190212025632.28946-17-peterx@redhat.com> In-Reply-To: <20190212025632.28946-1-peterx@redhat.com> References: <20190212025632.28946-1-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Tue, 12 Feb 2019 02:59:47 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Adding these missing helpers for uffd-wp operations with pmd swap/migration entries. Signed-off-by: Peter Xu --- arch/x86/include/asm/pgtable.h | 15 +++++++++++++++ include/asm-generic/pgtable_uffd.h | 15 +++++++++++++++ 2 files changed, 30 insertions(+) diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index 6863236e8484..18a815d6f4ea 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -1401,6 +1401,21 @@ static inline pte_t pte_swp_clear_uffd_wp(pte_t pte) { return pte_clear_flags(pte, _PAGE_SWP_UFFD_WP); } + +static inline pmd_t pmd_swp_mkuffd_wp(pmd_t pmd) +{ + return pmd_set_flags(pmd, _PAGE_SWP_UFFD_WP); +} + +static inline int pmd_swp_uffd_wp(pmd_t pmd) +{ + return pmd_flags(pmd) & _PAGE_SWP_UFFD_WP; +} + +static inline pmd_t pmd_swp_clear_uffd_wp(pmd_t pmd) +{ + return pmd_clear_flags(pmd, _PAGE_SWP_UFFD_WP); +} #endif /* CONFIG_HAVE_ARCH_USERFAULTFD_WP */ #define PKRU_AD_BIT 0x1 diff --git a/include/asm-generic/pgtable_uffd.h b/include/asm-generic/pgtable_uffd.h index 643d1bf559c2..828966d4c281 100644 --- a/include/asm-generic/pgtable_uffd.h +++ b/include/asm-generic/pgtable_uffd.h @@ -46,6 +46,21 @@ static __always_inline pte_t pte_swp_clear_uffd_wp(pte_t pte) { return pte; } + +static inline pmd_t pmd_swp_mkuffd_wp(pmd_t pmd) +{ + return pmd; +} + +static inline int pmd_swp_uffd_wp(pmd_t pmd) +{ + return 0; +} + +static inline pmd_t pmd_swp_clear_uffd_wp(pmd_t pmd) +{ + return pmd; +} #endif /* CONFIG_HAVE_ARCH_USERFAULTFD_WP */ #endif /* _ASM_GENERIC_PGTABLE_UFFD_H */ -- 2.17.1