From patchwork Mon Oct 7 15:38:05 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Price X-Patchwork-Id: 11177963 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E97721862 for ; Mon, 7 Oct 2019 15:40:17 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id C791221655 for ; Mon, 7 Oct 2019 15:40:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="jYlwxtZw" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C791221655 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=k6X47N42yL9yEPQrnSHwm8COCaq6i9pQxKeLTdtnqgk=; b=jYlwxtZwF6xlDC br67aY86ThwxfGNpcOZMCr1KFmdhVmkw0cKEHQkM862MHLLl4g3kdupNecl9JI660Rr+YEudOUueE US2tcU2POORxxk3CxbrBnLEiTijW+fDrrxTSA3NljlSk16rvYEpmB280CC6R1T8jlzsOdXcpVuc2/ N8uKScKQbL5iCw2sVsfwqEsw4FgdHVj2StqpL9WNbTzMhOI7qUmLKflClAcCeR0fMfDrHmeA4NahE hoUSWQ+2EPW9IWORhCu3jzjTi/AJ+8qMLfbUOm/So6tkZ8gzv9Nbw8SpLGuRs/RAJHSkLGjFCiFaQ UQ/EqgM9tTFbiFUPYTkg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1iHV7O-0005kh-SI; Mon, 07 Oct 2019 15:40:14 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1iHV69-0003JY-S9 for linux-arm-kernel@lists.infradead.org; Mon, 07 Oct 2019 15:38:59 +0000 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 333181576; Mon, 7 Oct 2019 08:38:56 -0700 (PDT) Received: from e112269-lin.arm.com (unknown [10.1.197.21]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 2DC7E3F6C4; Mon, 7 Oct 2019 08:38:53 -0700 (PDT) From: Steven Price To: linux-mm@kvack.org Subject: [PATCH v11 05/22] mips: mm: Add p?d_leaf() definitions Date: Mon, 7 Oct 2019 16:38:05 +0100 Message-Id: <20191007153822.16518-6-steven.price@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191007153822.16518-1-steven.price@arm.com> References: <20191007153822.16518-1-steven.price@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191007_083857_966631_9FCD5C6F X-CRM114-Status: GOOD ( 12.24 ) X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Peter Zijlstra , Catalin Marinas , Dave Hansen , linux-mips@vger.kernel.org, "H. Peter Anvin" , Will Deacon , "Liang, Kan" , x86@kernel.org, Steven Price , Ingo Molnar , James Hogan , Arnd Bergmann , =?utf-8?b?SsOpcsO0bWUgR2xpc3Nl?= , Borislav Petkov , Andy Lutomirski , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, Ard Biesheuvel , linux-kernel@vger.kernel.org, Ralf Baechle , Paul Burton , James Morse , Andrew Morton Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org 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/pgtable.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 mm_struct *mm, #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ +#ifdef _PAGE_HUGE +#define pmd_leaf(pmd) ((pmd_val(pmd) & _PAGE_HUGE) != 0) +#define pud_leaf(pud) ((pud_val(pud) & _PAGE_HUGE) != 0) +#endif + #define gup_fast_permitted(start, end) (!cpu_has_dc_aliases) #include