From patchwork Fri Dec 6 13:52:58 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Price X-Patchwork-Id: 11276263 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 04C3A109A for ; Fri, 6 Dec 2019 13:56:14 +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 D0CE720706 for ; Fri, 6 Dec 2019 13:56:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="n9SDMlWe" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D0CE720706 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-riscv-bounces+patchwork-linux-riscv=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:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-Id:Date :Subject:To:From:Reply-To:Content-Type:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Ex82G6gYS1crw+YJCIjC4u3OW7Wo09p2wIY2iG4MNOk=; b=n9SDMlWeIpPQYq HNiw5hWX+OnwWzwafiA7MXLbXqLG0R2OBkqG5T0TqBywbk6eGm/6JEtzQ0yfSQAwf4zSAtB49xXy8 TY1YeuHVCXxujxkkpSbc/y78JpGpsG+V/LnOjdiRtK4pKWLLTV7UgXo2b3WQ1Ly/viqte7J7cvExw VPgTq8UHrkFIq6u7gHpt4D+EoIgFesJ8eyMh5m07Qo+P9ehfJ4a+7oVzaT0Aiw0TbfDvfbhamWgWP 8IaW2JiyPuU9Ff7Q1U6B0ujkGKJ/W7ZZgRImrQB0dcqiAHsAjXVWL6bt2Min8I0vLZlIrQIk6nWEe PrmJaH7OhJT9bPUeeUPQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1idE5c-0005pB-E5; Fri, 06 Dec 2019 13:56:12 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1idE3Z-0002j9-3m; Fri, 06 Dec 2019 13:54:07 +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 915941FB; Fri, 6 Dec 2019 05:54:04 -0800 (PST) Received: from e112269-lin.cambridge.arm.com (e112269-lin.cambridge.arm.com [10.1.194.43]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 6373D3F718; Fri, 6 Dec 2019 05:54:01 -0800 (PST) From: Steven Price To: Andrew Morton , linux-mm@kvack.org Subject: [PATCH v16 07/25] riscv: mm: Add p?d_leaf() definitions Date: Fri, 6 Dec 2019 13:52:58 +0000 Message-Id: <20191206135316.47703-8-steven.price@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191206135316.47703-1-steven.price@arm.com> References: <20191206135316.47703-1-steven.price@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191206_055405_210421_9A1A9498 X-CRM114-Status: GOOD ( 10.34 ) 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-riscv@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 , Zong Li , "H. Peter Anvin" , linux-riscv@lists.infradead.org, Will Deacon , "Liang, Kan" , Alexandre Ghiti , x86@kernel.org, Steven Price , Ingo Molnar , Palmer Dabbelt , Albert Ou , Arnd Bergmann , =?utf-8?b?SsOpcsO0bWUgR2xpc3Nl?= , Borislav Petkov , Andy Lutomirski , Paul Walmsley , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, Ard Biesheuvel , linux-kernel@vger.kernel.org, James Morse Sender: "linux-riscv" Errors-To: linux-riscv-bounces+patchwork-linux-riscv=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. For riscv a page is a leaf page when it has a read, write or execute bit set on it. CC: Palmer Dabbelt CC: Albert Ou CC: linux-riscv@lists.infradead.org Reviewed-by: Alexandre Ghiti Reviewed-by: Zong Li Acked-by: Paul Walmsley # for arch/riscv Signed-off-by: Steven Price --- arch/riscv/include/asm/pgtable-64.h | 7 +++++++ arch/riscv/include/asm/pgtable.h | 7 +++++++ 2 files changed, 14 insertions(+) diff --git a/arch/riscv/include/asm/pgtable-64.h b/arch/riscv/include/asm/pgtable-64.h index 74630989006d..4c4d2c65ba6c 100644 --- a/arch/riscv/include/asm/pgtable-64.h +++ b/arch/riscv/include/asm/pgtable-64.h @@ -43,6 +43,13 @@ static inline int pud_bad(pud_t pud) return !pud_present(pud); } +#define pud_leaf pud_leaf +static inline int pud_leaf(pud_t pud) +{ + return pud_present(pud) && + (pud_val(pud) & (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC)); +} + static inline void set_pud(pud_t *pudp, pud_t pud) { *pudp = pud; diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index 7ff0ed4f292e..5cf96b2b4d5a 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -105,6 +105,13 @@ static inline int pmd_bad(pmd_t pmd) return !pmd_present(pmd); } +#define pmd_leaf pmd_leaf +static inline int pmd_leaf(pmd_t pmd) +{ + return pmd_present(pmd) && + (pmd_val(pmd) & (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC)); +} + static inline void set_pmd(pmd_t *pmdp, pmd_t pmd) { *pmdp = pmd;