From patchwork Wed Mar 6 15:50:13 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Price X-Patchwork-Id: 1052405 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=lists.infradead.org (client-ip=2607:7c80:54:e::133; helo=bombadil.infradead.org; envelope-from=linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="Gop86SO4"; dkim-atps=neutral Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 44Dysq5lqWz9sN8 for ; Thu, 7 Mar 2019 02:51:11 +1100 (AEDT) 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=XYJFFoJV1u4uLyQXps40W0a0KX13N5MbozEk/l/YfsU=; b=Gop86SO4Sr05BJ W47UfEYsoLCnjEm2O+5yZkRoWDAO5JgY0oAdpA26CqYsYihA3VQIWrZL+0M8KhnTT4ieSXc/F0qsC 9YcN+l2LyTW3lmdri5SVSIN8LNJePE0L/KZQRJggXOIo62gsrOj2uabdnXtHPCaox9/YeaoM3GoFh 6fAWvfDIP19P/Uc6oVLt5WzHYereARRUA9REIDKiqdlNsWBD/cpRq5dfxpW/2Lov68nbB2VkbeV93 g+Xo14fsl1DkH0/+duWW470JPMMzK3StACbxfvwovnSbSn/5SYsdgRxEBtzWbSt/9lWM/mCFoFDe4 r2xKFpK9yAaqjwesjgMw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1h1Yp2-0007oY-2s; Wed, 06 Mar 2019 15:51:08 +0000 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70] helo=foss.arm.com) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1h1Yok-0007Na-CR; Wed, 06 Mar 2019 15:50:53 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 8FBC91596; Wed, 6 Mar 2019 07:50:49 -0800 (PST) Received: from e112269-lin.arm.com (e112269-lin.cambridge.arm.com [10.1.196.69]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 0E1EB3F703; Wed, 6 Mar 2019 07:50:45 -0800 (PST) From: Steven Price To: linux-mm@kvack.org Subject: [PATCH v4 01/19] arc: mm: Add p?d_large() definitions Date: Wed, 6 Mar 2019 15:50:13 +0000 Message-Id: <20190306155031.4291-2-steven.price@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190306155031.4291-1-steven.price@arm.com> References: <20190306155031.4291-1-steven.price@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190306_075050_613469_F91A2419 X-CRM114-Status: GOOD ( 11.78 ) X-Spam-Score: -5.0 (-----) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-5.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at https://www.dnswl.org/, high trust [217.140.101.70 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , x86@kernel.org, Arnd Bergmann , Ard Biesheuvel , Peter Zijlstra , Catalin Marinas , Dave Hansen , Will Deacon , linux-kernel@vger.kernel.org, Steven Price , Vineet Gupta , =?utf-8?b?SsOpcsO0bWUgR2xpc3Nl?= , Ingo Molnar , Borislav Petkov , Andy Lutomirski , "H. Peter Anvin" , James Morse , Thomas Gleixner , linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, "Liang, Kan" Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+incoming=patchwork.ozlabs.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 will be provided by the p?d_large() functions/macros. For arc, we only have two levels, so only pmd_large() is needed. CC: Vineet Gupta CC: linux-snps-arc@lists.infradead.org Signed-off-by: Steven Price Acked-by: Vineet Gupta --- arch/arc/include/asm/pgtable.h | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arc/include/asm/pgtable.h b/arch/arc/include/asm/pgtable.h index cf4be70d5892..0edd27bc7018 100644 --- a/arch/arc/include/asm/pgtable.h +++ b/arch/arc/include/asm/pgtable.h @@ -277,6 +277,7 @@ static inline void pmd_set(pmd_t *pmdp, pte_t *ptep) #define pmd_none(x) (!pmd_val(x)) #define pmd_bad(x) ((pmd_val(x) & ~PAGE_MASK)) #define pmd_present(x) (pmd_val(x)) +#define pmd_large(x) (pmd_val(pmd) & _PAGE_HW_SZ) #define pmd_clear(xp) do { pmd_val(*(xp)) = 0; } while (0) #define pte_page(pte) pfn_to_page(pte_pfn(pte))