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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BB751C433EF for ; Mon, 14 Feb 2022 02:33:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234645AbiBNCdw (ORCPT ); Sun, 13 Feb 2022 21:33:52 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:46566 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239513AbiBNCdW (ORCPT ); Sun, 13 Feb 2022 21:33:22 -0500 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 7F7B560043; Sun, 13 Feb 2022 18:32:22 -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 4E8221396; Sun, 13 Feb 2022 18:32:22 -0800 (PST) Received: from p8cg001049571a15.arm.com (unknown [10.163.47.15]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id C3A053F718; Sun, 13 Feb 2022 18:32:19 -0800 (PST) From: Anshuman Khandual To: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, Anshuman Khandual , Christoph Hellwig , Andrew Morton , linux-arch@vger.kernel.org, Brian Cain , linux-hexagon@vger.kernel.org Subject: [PATCH 26/30] hexagon/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Date: Mon, 14 Feb 2022 08:00:49 +0530 Message-Id: <1644805853-21338-27-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1644805853-21338-1-git-send-email-anshuman.khandual@arm.com> References: <1644805853-21338-1-git-send-email-anshuman.khandual@arm.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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: Brian Cain Cc: linux-hexagon@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual --- arch/hexagon/Kconfig | 1 + arch/hexagon/include/asm/pgtable.h | 24 ----------- arch/hexagon/mm/init.c | 67 ++++++++++++++++++++++++++++++ 3 files changed, 68 insertions(+), 24 deletions(-) diff --git a/arch/hexagon/Kconfig b/arch/hexagon/Kconfig index 15dd8f38b698..cdc5df32a1e3 100644 --- a/arch/hexagon/Kconfig +++ b/arch/hexagon/Kconfig @@ -6,6 +6,7 @@ config HEXAGON def_bool y select ARCH_32BIT_OFF_T select ARCH_HAS_SYNC_DMA_FOR_DEVICE + select ARCH_HAS_VM_GET_PAGE_PROT select ARCH_NO_PREEMPT select DMA_GLOBAL_POOL # Other pending projects/to-do items. diff --git a/arch/hexagon/include/asm/pgtable.h b/arch/hexagon/include/asm/pgtable.h index 18cd6ea9ab23..5eceddfe013d 100644 --- a/arch/hexagon/include/asm/pgtable.h +++ b/arch/hexagon/include/asm/pgtable.h @@ -127,31 +127,7 @@ extern unsigned long _dflt_cache_att; #define CACHEDEF (CACHE_DEFAULT << 6) /* Private (copy-on-write) page protections. */ -#define __P000 __pgprot(_PAGE_PRESENT | _PAGE_USER | CACHEDEF) -#define __P001 __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | CACHEDEF) -#define __P010 __P000 /* Write-only copy-on-write */ -#define __P011 __P001 /* Read/Write copy-on-write */ -#define __P100 __pgprot(_PAGE_PRESENT | _PAGE_USER | \ - _PAGE_EXECUTE | CACHEDEF) -#define __P101 __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_EXECUTE | \ - _PAGE_READ | CACHEDEF) -#define __P110 __P100 /* Write/execute copy-on-write */ -#define __P111 __P101 /* Read/Write/Execute, copy-on-write */ - /* Shared page protections. */ -#define __S000 __P000 -#define __S001 __P001 -#define __S010 __pgprot(_PAGE_PRESENT | _PAGE_USER | \ - _PAGE_WRITE | CACHEDEF) -#define __S011 __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | \ - _PAGE_WRITE | CACHEDEF) -#define __S100 __pgprot(_PAGE_PRESENT | _PAGE_USER | \ - _PAGE_EXECUTE | CACHEDEF) -#define __S101 __P101 -#define __S110 __pgprot(_PAGE_PRESENT | _PAGE_USER | \ - _PAGE_EXECUTE | _PAGE_WRITE | CACHEDEF) -#define __S111 __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | \ - _PAGE_EXECUTE | _PAGE_WRITE | CACHEDEF) extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; /* located in head.S */ diff --git a/arch/hexagon/mm/init.c b/arch/hexagon/mm/init.c index f01e91e10d95..b53595fc4103 100644 --- a/arch/hexagon/mm/init.c +++ b/arch/hexagon/mm/init.c @@ -236,3 +236,70 @@ void __init setup_arch_memory(void) * which is called by start_kernel() later on in the process */ } + +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 __pgprot(_PAGE_PRESENT | _PAGE_USER | + CACHEDEF); + case VM_READ: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + _PAGE_READ | CACHEDEF); + /* Write-only copy-on-write */ + case VM_WRITE: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + CACHEDEF); + /* Read/Write copy-on-write */ + case VM_WRITE | VM_READ: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + _PAGE_READ | CACHEDEF); + case VM_EXEC: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + _PAGE_EXECUTE | CACHEDEF); + case VM_EXEC | VM_READ: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + _PAGE_EXECUTE | _PAGE_READ | + CACHEDEF); + /* Write/execute copy-on-write */ + case VM_EXEC | VM_WRITE: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + _PAGE_EXECUTE | CACHEDEF); + /* Read/Write/Execute, copy-on-write */ + case VM_EXEC | VM_WRITE | VM_READ: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + _PAGE_EXECUTE | _PAGE_READ | + CACHEDEF); + case VM_SHARED: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + CACHEDEF); + case VM_SHARED | VM_READ: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + _PAGE_READ | CACHEDEF); + case VM_SHARED | VM_WRITE: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + _PAGE_WRITE | CACHEDEF); + case VM_SHARED | VM_WRITE | VM_READ: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + _PAGE_READ | _PAGE_WRITE | + CACHEDEF); + case VM_SHARED | VM_EXEC: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + _PAGE_EXECUTE | CACHEDEF); + case VM_SHARED | VM_EXEC | VM_READ: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + _PAGE_EXECUTE | _PAGE_READ | + CACHEDEF); + case VM_SHARED | VM_EXEC | VM_WRITE: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + _PAGE_EXECUTE | _PAGE_WRITE | + CACHEDEF); + case VM_SHARED | VM_EXEC | VM_WRITE | VM_READ: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + _PAGE_READ | _PAGE_EXECUTE | + _PAGE_WRITE | CACHEDEF); + default: + BUILD_BUG(); + } +} +EXPORT_SYMBOL(vm_get_page_prot); -- 2.25.1