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=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT 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 07D3DCA9EC2 for ; Mon, 28 Oct 2019 13:59:36 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id C144C21744 for ; Mon, 28 Oct 2019 13:59:35 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C144C21744 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 70EF36B026A; Mon, 28 Oct 2019 09:59:35 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 69D796B026B; Mon, 28 Oct 2019 09:59:35 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5AE176B026C; Mon, 28 Oct 2019 09:59:35 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0134.hostedemail.com [216.40.44.134]) by kanga.kvack.org (Postfix) with ESMTP id 35A276B026A for ; Mon, 28 Oct 2019 09:59:35 -0400 (EDT) Received: from smtpin07.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with SMTP id C6F22180ACF84 for ; Mon, 28 Oct 2019 13:59:34 +0000 (UTC) X-FDA: 76093351068.07.lake63_195a94f4b021e X-HE-Tag: lake63_195a94f4b021e X-Filterd-Recvd-Size: 3304 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by imf07.hostedemail.com (Postfix) with ESMTP for ; Mon, 28 Oct 2019 13:59:34 +0000 (UTC) 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 8B3E3337; Mon, 28 Oct 2019 06:59:33 -0700 (PDT) Received: from e112269-lin.cambridge.arm.com (unknown [10.1.194.43]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 7B0C13F6C4; Mon, 28 Oct 2019 06:59:30 -0700 (PDT) From: Steven Price To: linux-mm@kvack.org Cc: Steven Price , Andy Lutomirski , Ard Biesheuvel , Arnd Bergmann , Borislav Petkov , Catalin Marinas , Dave Hansen , Ingo Molnar , James Morse , =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= , Peter Zijlstra , Thomas Gleixner , Will Deacon , x86@kernel.org, "H. Peter Anvin" , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Mark Rutland , "Liang, Kan" , Andrew Morton , Ralf Baechle , Paul Burton , James Hogan , linux-mips@vger.kernel.org Subject: [PATCH v14 05/22] mips: mm: Add p?d_leaf() definitions Date: Mon, 28 Oct 2019 13:58:53 +0000 Message-Id: <20191028135910.33253-6-steven.price@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191028135910.33253-1-steven.price@arm.com> References: <20191028135910.33253-1-steven.price@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: walk_page_range() is going to be allowed to walk page tables other than those of user space. For this it needs to know when it has reached a 'leaf' entry in the page tables. This information is provided by the p?d_leaf() functions/macros. If _PAGE_HUGE is defined we can simply look for it. When not defined we can be confident that there are no leaf pages in existence and fall back on the generic implementation (added in a later patch) which returns 0. CC: Ralf Baechle CC: Paul Burton CC: James Hogan CC: linux-mips@vger.kernel.org Signed-off-by: Steven Price Acked-by: Paul Burton --- arch/mips/include/asm/pgtable.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/mips/include/asm/pgtable.h b/arch/mips/include/asm/pgta= ble.h index f85bd5b15f51..fff392ea80c7 100644 --- a/arch/mips/include/asm/pgtable.h +++ b/arch/mips/include/asm/pgtable.h @@ -639,6 +639,11 @@ static inline pmd_t pmdp_huge_get_and_clear(struct m= m_struct *mm, =20 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ =20 +#ifdef _PAGE_HUGE +#define pmd_leaf(pmd) ((pmd_val(pmd) & _PAGE_HUGE) !=3D 0) +#define pud_leaf(pud) ((pud_val(pud) & _PAGE_HUGE) !=3D 0) +#endif + #define gup_fast_permitted(start, end) (!cpu_has_dc_aliases) =20 #include --=20 2.20.1