From patchwork Tue Aug 19 19:41:42 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laura Abbott X-Patchwork-Id: 4745681 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 125DAC0338 for ; Tue, 19 Aug 2014 19:45:26 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3A7072012E for ; Tue, 19 Aug 2014 19:45:25 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 506F120123 for ; Tue, 19 Aug 2014 19:45:24 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1XJpIP-0000EM-3Q; Tue, 19 Aug 2014 19:42:17 +0000 Received: from smtp.codeaurora.org ([198.145.11.231]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XJpIH-0000Au-Cm for linux-arm-kernel@lists.infradead.org; Tue, 19 Aug 2014 19:42:10 +0000 Received: from smtp.codeaurora.org (localhost [127.0.0.1]) by smtp.codeaurora.org (Postfix) with ESMTP id E07C5140A3B; Tue, 19 Aug 2014 19:41:48 +0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 486) id D41B4140A3F; Tue, 19 Aug 2014 19:41:48 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from lauraa-linux1.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: lauraa@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 4C3ED140A3B; Tue, 19 Aug 2014 19:41:48 +0000 (UTC) From: Laura Abbott To: Catalin Marinas , Will Deacon , Steve Capper Subject: [PATCHv4 1/2] arm64: Introduce {set,clear}_pte_bit Date: Tue, 19 Aug 2014 12:41:42 -0700 Message-Id: <1408477303-2640-2-git-send-email-lauraa@codeaurora.org> X-Mailer: git-send-email 1.8.2.1 In-Reply-To: <1408477303-2640-1-git-send-email-lauraa@codeaurora.org> References: <1408477303-2640-1-git-send-email-lauraa@codeaurora.org> X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140819_124209_463872_7A561F94 X-CRM114-Status: GOOD ( 13.83 ) X-Spam-Score: -0.7 (/) Cc: Laura Abbott , Kees Cook , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP It's useful to be able to change individual bits in ptes at times. Introduce functions for this and update existing pte_mk* functions to use these primatives. Acked-by: Will Deacon Signed-off-by: Laura Abbott --- arch/arm64/include/asm/pgtable.h | 33 +++++++++++++++++++-------------- 1 file changed, 19 insertions(+), 14 deletions(-) diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index ffe1ba0..ca41449 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -149,46 +149,51 @@ extern struct page *empty_zero_page; #define pte_valid_not_user(pte) \ ((pte_val(pte) & (PTE_VALID | PTE_USER)) == PTE_VALID) -static inline pte_t pte_wrprotect(pte_t pte) +static pte_t clear_pte_bit(pte_t pte, pgprot_t prot) { - pte_val(pte) &= ~PTE_WRITE; + pte_val(pte) &= ~pgprot_val(prot); return pte; } -static inline pte_t pte_mkwrite(pte_t pte) +static pte_t set_pte_bit(pte_t pte, pgprot_t prot) { - pte_val(pte) |= PTE_WRITE; + pte_val(pte) |= pgprot_val(prot); return pte; } +static inline pte_t pte_wrprotect(pte_t pte) +{ + return clear_pte_bit(pte, __pgprot(PTE_WRITE)); +} + +static inline pte_t pte_mkwrite(pte_t pte) +{ + return set_pte_bit(pte, __pgprot(PTE_WRITE)); +} + static inline pte_t pte_mkclean(pte_t pte) { - pte_val(pte) &= ~PTE_DIRTY; - return pte; + return clear_pte_bit(pte, __pgprot(PTE_DIRTY)); } static inline pte_t pte_mkdirty(pte_t pte) { - pte_val(pte) |= PTE_DIRTY; - return pte; + return set_pte_bit(pte, __pgprot(PTE_DIRTY)); } static inline pte_t pte_mkold(pte_t pte) { - pte_val(pte) &= ~PTE_AF; - return pte; + return clear_pte_bit(pte, __pgprot(PTE_AF)); } static inline pte_t pte_mkyoung(pte_t pte) { - pte_val(pte) |= PTE_AF; - return pte; + return set_pte_bit(pte, __pgprot(PTE_AF)); } static inline pte_t pte_mkspecial(pte_t pte) { - pte_val(pte) |= PTE_SPECIAL; - return pte; + return set_pte_bit(pte, __pgprot(PTE_SPECIAL)); } static inline void set_pte(pte_t *ptep, pte_t pte)