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 Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5038AC433EF for ; Fri, 3 Jun 2022 10:17:49 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4LDzND0Ln1z3f6y for ; Fri, 3 Jun 2022 20:17:48 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=arm.com (client-ip=217.140.110.172; helo=foss.arm.com; envelope-from=anshuman.khandual@arm.com; receiver=) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lists.ozlabs.org (Postfix) with ESMTP id 4LDzL20MVpz3dPq for ; Fri, 3 Jun 2022 20:15:53 +1000 (AEST) 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 97ADC1655; Fri, 3 Jun 2022 03:15:22 -0700 (PDT) Received: from a077893.blr.arm.com (unknown [10.162.42.23]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id EB91A3F766; Fri, 3 Jun 2022 03:15:13 -0700 (PDT) From: Anshuman Khandual To: linux-mm@kvack.org Subject: [PATCH 6/6] openrisc/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Date: Fri, 3 Jun 2022 15:44:11 +0530 Message-Id: <20220603101411.488970-7-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220603101411.488970-1-anshuman.khandual@arm.com> References: <20220603101411.488970-1-anshuman.khandual@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Catalin Marinas , linux-kernel@vger.kernel.org, Paul Mackerras , sparclinux@vger.kernel.org, Will Deacon , Stafford Horne , Jonas Bonn , linux-s390@vger.kernel.org, x86@kernel.org, linux-csky@vger.kernel.org, Ingo Molnar , Geert Uytterhoeven , Vasily Gorbik , Anshuman Khandual , Heiko Carstens , openrisc@lists.librecores.org, Thomas Gleixner , linux-arm-kernel@lists.infradead.org, Thomas Bogendoerfer , linux-mips@vger.kernel.org, Dinh Nguyen , Andrew Morton , linuxppc-dev@lists.ozlabs.org, "David S. Miller" Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" This defines and exports a platform specific custom vm_get_page_prot() via subscribing ARCH_HAS_VM_GET_PAGE_PROT. Subsequently all __SXXX and __PXXX macros can be dropped which are no longer needed. Cc: Jonas Bonn Cc: openrisc@lists.librecores.org Cc: linux-kernel@vger.kernel.org Acked-by: Stafford Horne Signed-off-by: Anshuman Khandual --- arch/openrisc/Kconfig | 1 + arch/openrisc/include/asm/pgtable.h | 18 ------------- arch/openrisc/mm/init.c | 41 +++++++++++++++++++++++++++++ 3 files changed, 42 insertions(+), 18 deletions(-) diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig index e814df4c483c..fe0dfb50eb86 100644 --- a/arch/openrisc/Kconfig +++ b/arch/openrisc/Kconfig @@ -10,6 +10,7 @@ config OPENRISC select ARCH_HAS_DMA_SET_UNCACHED select ARCH_HAS_DMA_CLEAR_UNCACHED select ARCH_HAS_SYNC_DMA_FOR_DEVICE + select ARCH_HAS_VM_GET_PAGE_PROT select COMMON_CLK select OF select OF_EARLY_FLATTREE diff --git a/arch/openrisc/include/asm/pgtable.h b/arch/openrisc/include/asm/pgtable.h index c3abbf71e09f..dcae8aea132f 100644 --- a/arch/openrisc/include/asm/pgtable.h +++ b/arch/openrisc/include/asm/pgtable.h @@ -176,24 +176,6 @@ extern void paging_init(void); __pgprot(_PAGE_ALL | _PAGE_SRE | _PAGE_SWE \ | _PAGE_SHARED | _PAGE_DIRTY | _PAGE_EXEC | _PAGE_CI) -#define __P000 PAGE_NONE -#define __P001 PAGE_READONLY_X -#define __P010 PAGE_COPY -#define __P011 PAGE_COPY_X -#define __P100 PAGE_READONLY -#define __P101 PAGE_READONLY_X -#define __P110 PAGE_COPY -#define __P111 PAGE_COPY_X - -#define __S000 PAGE_NONE -#define __S001 PAGE_READONLY_X -#define __S010 PAGE_SHARED -#define __S011 PAGE_SHARED_X -#define __S100 PAGE_READONLY -#define __S101 PAGE_READONLY_X -#define __S110 PAGE_SHARED -#define __S111 PAGE_SHARED_X - /* zero page used for uninitialized stuff */ extern unsigned long empty_zero_page[2048]; #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) diff --git a/arch/openrisc/mm/init.c b/arch/openrisc/mm/init.c index 3a021ab6f1ae..266dc68c32e5 100644 --- a/arch/openrisc/mm/init.c +++ b/arch/openrisc/mm/init.c @@ -208,3 +208,44 @@ void __init mem_init(void) mem_init_done = 1; return; } + +pgprot_t vm_get_page_prot(unsigned long vm_flags) +{ + switch (vm_flags & (VM_READ | VM_WRITE | VM_EXEC | VM_SHARED)) { + case VM_NONE: + return PAGE_NONE; + case VM_READ: + return PAGE_READONLY_X; + case VM_WRITE: + return PAGE_COPY; + case VM_WRITE | VM_READ: + return PAGE_COPY_X; + case VM_EXEC: + return PAGE_READONLY; + case VM_EXEC | VM_READ: + return PAGE_READONLY_X; + case VM_EXEC | VM_WRITE: + return PAGE_COPY; + case VM_EXEC | VM_WRITE | VM_READ: + return PAGE_COPY_X; + case VM_SHARED: + return PAGE_NONE; + case VM_SHARED | VM_READ: + return PAGE_READONLY_X; + case VM_SHARED | VM_WRITE: + return PAGE_SHARED; + case VM_SHARED | VM_WRITE | VM_READ: + return PAGE_SHARED_X; + case VM_SHARED | VM_EXEC: + return PAGE_READONLY; + case VM_SHARED | VM_EXEC | VM_READ: + return PAGE_READONLY_X; + case VM_SHARED | VM_EXEC | VM_WRITE: + return PAGE_SHARED; + case VM_SHARED | VM_EXEC | VM_WRITE | VM_READ: + return PAGE_SHARED_X; + default: + BUILD_BUG(); + } +} +EXPORT_SYMBOL(vm_get_page_prot); -- 2.25.1