From patchwork Mon Feb 28 10:47:39 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 12762776 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 413F2C4321E for ; Mon, 28 Feb 2022 10:51:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235154AbiB1KwB (ORCPT ); Mon, 28 Feb 2022 05:52:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50912 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235157AbiB1Kvl (ORCPT ); Mon, 28 Feb 2022 05:51:41 -0500 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 3C5F163BF8; Mon, 28 Feb 2022 02:51:02 -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 0089B1063; Mon, 28 Feb 2022 02:51:02 -0800 (PST) Received: from p8cg001049571a15.arm.com (unknown [10.163.47.185]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id BD8333F73D; Mon, 28 Feb 2022 02:50:53 -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, Richard Henderson Subject: [PATCH V3 16/30] alpha/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Date: Mon, 28 Feb 2022 16:17:39 +0530 Message-Id: <1646045273-9343-17-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: Richard Henderson Cc: linux-alpha@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual --- arch/alpha/Kconfig | 1 + arch/alpha/include/asm/pgtable.h | 17 --------------- arch/alpha/mm/init.c | 37 ++++++++++++++++++++++++++++++++ 3 files changed, 38 insertions(+), 17 deletions(-) diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig index 4e87783c90ad..73e82fe5c770 100644 --- a/arch/alpha/Kconfig +++ b/arch/alpha/Kconfig @@ -2,6 +2,7 @@ config ALPHA bool default y + select ARCH_HAS_VM_GET_PAGE_PROT select ARCH_32BIT_USTAT_F_TINODE select ARCH_MIGHT_HAVE_PC_PARPORT select ARCH_MIGHT_HAVE_PC_SERIO diff --git a/arch/alpha/include/asm/pgtable.h b/arch/alpha/include/asm/pgtable.h index 02f0429f1068..9fb5e9d10bb6 100644 --- a/arch/alpha/include/asm/pgtable.h +++ b/arch/alpha/include/asm/pgtable.h @@ -116,23 +116,6 @@ struct vm_area_struct; * arch/alpha/mm/fault.c) */ /* xwr */ -#define __P000 _PAGE_P(_PAGE_FOE | _PAGE_FOW | _PAGE_FOR) -#define __P001 _PAGE_P(_PAGE_FOE | _PAGE_FOW) -#define __P010 _PAGE_P(_PAGE_FOE) -#define __P011 _PAGE_P(_PAGE_FOE) -#define __P100 _PAGE_P(_PAGE_FOW | _PAGE_FOR) -#define __P101 _PAGE_P(_PAGE_FOW) -#define __P110 _PAGE_P(0) -#define __P111 _PAGE_P(0) - -#define __S000 _PAGE_S(_PAGE_FOE | _PAGE_FOW | _PAGE_FOR) -#define __S001 _PAGE_S(_PAGE_FOE | _PAGE_FOW) -#define __S010 _PAGE_S(_PAGE_FOE) -#define __S011 _PAGE_S(_PAGE_FOE) -#define __S100 _PAGE_S(_PAGE_FOW | _PAGE_FOR) -#define __S101 _PAGE_S(_PAGE_FOW) -#define __S110 _PAGE_S(0) -#define __S111 _PAGE_S(0) /* * pgprot_noncached() is only for infiniband pci support, and a real diff --git a/arch/alpha/mm/init.c b/arch/alpha/mm/init.c index f6114d03357c..2e78008b2553 100644 --- a/arch/alpha/mm/init.c +++ b/arch/alpha/mm/init.c @@ -280,3 +280,40 @@ mem_init(void) high_memory = (void *) __va(max_low_pfn * PAGE_SIZE); memblock_free_all(); } + +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_P(_PAGE_FOE | _PAGE_FOW | _PAGE_FOR); + case VM_READ: + return _PAGE_P(_PAGE_FOE | _PAGE_FOW); + case VM_WRITE: + case VM_WRITE | VM_READ: + return _PAGE_P(_PAGE_FOE); + case VM_EXEC: + return _PAGE_P(_PAGE_FOW | _PAGE_FOR); + case VM_EXEC | VM_READ: + return _PAGE_P(_PAGE_FOW); + case VM_EXEC | VM_WRITE: + case VM_EXEC | VM_WRITE | VM_READ: + return _PAGE_P(0); + case VM_SHARED: + return _PAGE_S(_PAGE_FOE | _PAGE_FOW | _PAGE_FOR); + case VM_SHARED | VM_READ: + return _PAGE_S(_PAGE_FOE | _PAGE_FOW); + case VM_SHARED | VM_WRITE: + case VM_SHARED | VM_WRITE | VM_READ: + return _PAGE_S(_PAGE_FOE); + case VM_SHARED | VM_EXEC: + return _PAGE_S(_PAGE_FOW | _PAGE_FOR); + case VM_SHARED | VM_EXEC | VM_READ: + return _PAGE_S(_PAGE_FOW); + case VM_SHARED | VM_EXEC | VM_WRITE: + case VM_SHARED | VM_EXEC | VM_WRITE | VM_READ: + return _PAGE_S(0); + default: + BUILD_BUG(); + } +} +EXPORT_SYMBOL(vm_get_page_prot);