From patchwork Mon Feb 28 10:47:47 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 12762853 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2CBE3C433F5 for ; Mon, 28 Feb 2022 10:54:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235356AbiB1KzD (ORCPT ); Mon, 28 Feb 2022 05:55:03 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51080 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235216AbiB1Kyk (ORCPT ); Mon, 28 Feb 2022 05:54:40 -0500 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 438646E7A7; Mon, 28 Feb 2022 02:52:10 -0800 (PST) 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 00A8411FB; Mon, 28 Feb 2022 02:52:10 -0800 (PST) Received: from p8cg001049571a15.arm.com (unknown [10.163.47.185]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 1303C3F73D; Mon, 28 Feb 2022 02:52:01 -0800 (PST) From: Anshuman Khandual To: linux-mm@kvack.org, akpm@linux-foundation.org Cc: linux-kernel@vger.kernel.org, geert@linux-m68k.org, Anshuman Khandual , Christoph Hellwig , linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, sparclinux@vger.kernel.org, linux-mips@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-s390@vger.kernel.org, linux-riscv@lists.infradead.org, linux-alpha@vger.kernel.org, linux-sh@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-csky@vger.kernel.org, linux-xtensa@linux-xtensa.org, linux-parisc@vger.kernel.org, openrisc@lists.librecores.org, linux-um@lists.infradead.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, linux-arch@vger.kernel.org, Michal Simek Subject: [PATCH V3 24/30] microblaze/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Date: Mon, 28 Feb 2022 16:17:47 +0530 Message-Id: <1646045273-9343-25-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1646045273-9343-1-git-send-email-anshuman.khandual@arm.com> References: <1646045273-9343-1-git-send-email-anshuman.khandual@arm.com> Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org 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: Michal Simek Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual --- arch/microblaze/Kconfig | 1 + arch/microblaze/include/asm/pgtable.h | 17 ----------- arch/microblaze/mm/init.c | 41 +++++++++++++++++++++++++++ 3 files changed, 42 insertions(+), 17 deletions(-) diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig index 59798e43cdb0..f2c25ba8621e 100644 --- a/arch/microblaze/Kconfig +++ b/arch/microblaze/Kconfig @@ -7,6 +7,7 @@ config MICROBLAZE select ARCH_HAS_GCOV_PROFILE_ALL select ARCH_HAS_SYNC_DMA_FOR_CPU select ARCH_HAS_SYNC_DMA_FOR_DEVICE + select ARCH_HAS_VM_GET_PAGE_PROT select ARCH_MIGHT_HAVE_PC_PARPORT select ARCH_WANT_IPC_PARSE_VERSION select BUILDTIME_TABLE_SORT diff --git a/arch/microblaze/include/asm/pgtable.h b/arch/microblaze/include/asm/pgtable.h index c136a01e467e..6df373077ff2 100644 --- a/arch/microblaze/include/asm/pgtable.h +++ b/arch/microblaze/include/asm/pgtable.h @@ -204,23 +204,6 @@ extern pte_t *va_to_pte(unsigned long address); * We consider execute permission the same as read. * Also, write permissions imply read permissions. */ -#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 #ifndef __ASSEMBLY__ /* diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c index 952f35b335b2..68faf7d04faf 100644 --- a/arch/microblaze/mm/init.c +++ b/arch/microblaze/mm/init.c @@ -280,3 +280,44 @@ void * __ref zalloc_maybe_bootmem(size_t size, gfp_t mask) return p; } + +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);