From patchwork Mon Feb 28 10:47:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 12762767 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 121C1C4332F for ; Mon, 28 Feb 2022 10:50:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235095AbiB1KvS (ORCPT ); Mon, 28 Feb 2022 05:51:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47012 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235007AbiB1Ku0 (ORCPT ); Mon, 28 Feb 2022 05:50:26 -0500 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id BE11F64BC1; Mon, 28 Feb 2022 02:49:44 -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 77F3A1063; Mon, 28 Feb 2022 02:49:44 -0800 (PST) Received: from p8cg001049571a15.arm.com (unknown [10.163.47.185]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id BC64A3F73D; Mon, 28 Feb 2022 02:49:36 -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, Thomas Bogendoerfer Subject: [PATCH V3 07/30] mips/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Date: Mon, 28 Feb 2022 16:17:30 +0530 Message-Id: <1646045273-9343-8-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-mips@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: Thomas Bogendoerfer Cc: linux-mips@vger.kernel.org Cc: linux-kernel@vger.kernel.org Acked-by: Thomas Bogendoerfer Signed-off-by: Anshuman Khandual --- arch/mips/Kconfig | 1 + arch/mips/include/asm/pgtable.h | 22 ------------ arch/mips/mm/cache.c | 60 +++++++++++++++++++-------------- 3 files changed, 36 insertions(+), 47 deletions(-) diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 058446f01487..fcbfc52a1567 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -13,6 +13,7 @@ config MIPS select ARCH_HAS_STRNLEN_USER select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST select ARCH_HAS_UBSAN_SANITIZE_ALL + select ARCH_HAS_VM_GET_PAGE_PROT select ARCH_HAS_GCOV_PROFILE_ALL select ARCH_KEEP_MEMBLOCK select ARCH_SUPPORTS_UPROBES diff --git a/arch/mips/include/asm/pgtable.h b/arch/mips/include/asm/pgtable.h index 7b8037f25d9e..bf193ad4f195 100644 --- a/arch/mips/include/asm/pgtable.h +++ b/arch/mips/include/asm/pgtable.h @@ -41,28 +41,6 @@ struct vm_area_struct; * by reasonable means.. */ -/* - * Dummy values to fill the table in mmap.c - * The real values will be generated at runtime - */ -#define __P000 __pgprot(0) -#define __P001 __pgprot(0) -#define __P010 __pgprot(0) -#define __P011 __pgprot(0) -#define __P100 __pgprot(0) -#define __P101 __pgprot(0) -#define __P110 __pgprot(0) -#define __P111 __pgprot(0) - -#define __S000 __pgprot(0) -#define __S001 __pgprot(0) -#define __S010 __pgprot(0) -#define __S011 __pgprot(0) -#define __S100 __pgprot(0) -#define __S101 __pgprot(0) -#define __S110 __pgprot(0) -#define __S111 __pgprot(0) - extern unsigned long _page_cachable_default; extern void __update_cache(unsigned long address, pte_t pte); diff --git a/arch/mips/mm/cache.c b/arch/mips/mm/cache.c index 830ab91e574f..9f33ce4fb105 100644 --- a/arch/mips/mm/cache.c +++ b/arch/mips/mm/cache.c @@ -159,30 +159,6 @@ EXPORT_SYMBOL(_page_cachable_default); #define PM(p) __pgprot(_page_cachable_default | (p)) -static inline void setup_protection_map(void) -{ - protection_map[0] = PM(_PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_NO_READ); - protection_map[1] = PM(_PAGE_PRESENT | _PAGE_NO_EXEC); - protection_map[2] = PM(_PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_NO_READ); - protection_map[3] = PM(_PAGE_PRESENT | _PAGE_NO_EXEC); - protection_map[4] = PM(_PAGE_PRESENT); - protection_map[5] = PM(_PAGE_PRESENT); - protection_map[6] = PM(_PAGE_PRESENT); - protection_map[7] = PM(_PAGE_PRESENT); - - protection_map[8] = PM(_PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_NO_READ); - protection_map[9] = PM(_PAGE_PRESENT | _PAGE_NO_EXEC); - protection_map[10] = PM(_PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_WRITE | - _PAGE_NO_READ); - protection_map[11] = PM(_PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_WRITE); - protection_map[12] = PM(_PAGE_PRESENT); - protection_map[13] = PM(_PAGE_PRESENT); - protection_map[14] = PM(_PAGE_PRESENT | _PAGE_WRITE); - protection_map[15] = PM(_PAGE_PRESENT | _PAGE_WRITE); -} - -#undef PM - void cpu_cache_init(void) { if (cpu_has_3k_cache) { @@ -206,6 +182,40 @@ void cpu_cache_init(void) octeon_cache_init(); } +} - setup_protection_map(); +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 PM(_PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_NO_READ); + case VM_READ: + return PM(_PAGE_PRESENT | _PAGE_NO_EXEC); + case VM_WRITE: + return PM(_PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_NO_READ); + case VM_WRITE | VM_READ: + return PM(_PAGE_PRESENT | _PAGE_NO_EXEC); + case VM_EXEC: + case VM_EXEC | VM_READ: + case VM_EXEC | VM_WRITE: + case VM_EXEC | VM_WRITE | VM_READ: + return PM(_PAGE_PRESENT); + case VM_SHARED: + return PM(_PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_NO_READ); + case VM_SHARED | VM_READ: + return PM(_PAGE_PRESENT | _PAGE_NO_EXEC); + case VM_SHARED | VM_WRITE: + return PM(_PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_WRITE | _PAGE_NO_READ); + case VM_SHARED | VM_WRITE | VM_READ: + return PM(_PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_WRITE); + case VM_SHARED | VM_EXEC: + case VM_SHARED | VM_EXEC | VM_READ: + return PM(_PAGE_PRESENT); + case VM_SHARED | VM_EXEC | VM_WRITE: + case VM_SHARED | VM_EXEC | VM_WRITE | VM_READ: + return PM(_PAGE_PRESENT | _PAGE_WRITE); + default: + BUILD_BUG(); + } } +EXPORT_SYMBOL(vm_get_page_prot);