From patchwork Mon Jan 24 12:56:54 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 12722077 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 48B63C433F5 for ; Mon, 24 Jan 2022 12:58:20 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id C14976B00AE; Mon, 24 Jan 2022 07:58:19 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id BC4A16B00B0; Mon, 24 Jan 2022 07:58:19 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id ADA626B00B1; Mon, 24 Jan 2022 07:58:19 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 9EB536B00AE for ; Mon, 24 Jan 2022 07:58:19 -0500 (EST) Received: from smtpin14.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 4D5EC90942 for ; Mon, 24 Jan 2022 12:58:19 +0000 (UTC) X-FDA: 79065183918.14.33BE206 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by imf01.hostedemail.com (Postfix) with ESMTP id C5D4D40025 for ; Mon, 24 Jan 2022 12:58:18 +0000 (UTC) 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 4C05D101E; Mon, 24 Jan 2022 04:58:18 -0800 (PST) Received: from p8cg001049571a15.arm.com (unknown [10.163.43.190]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 666CB3F7F5; Mon, 24 Jan 2022 04:58:14 -0800 (PST) From: Anshuman Khandual To: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, hch@infradead.org, akpm@linux-foundation.org, Anshuman Khandual , Yoshinori Sato , Rich Felker , linux-sh@vger.kernel.org Subject: [RFC V1 17/31] sh/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Date: Mon, 24 Jan 2022 18:26:54 +0530 Message-Id: <1643029028-12710-18-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1643029028-12710-1-git-send-email-anshuman.khandual@arm.com> References: <1643029028-12710-1-git-send-email-anshuman.khandual@arm.com> Authentication-Results: imf01.hostedemail.com; dkim=none; spf=pass (imf01.hostedemail.com: domain of anshuman.khandual@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=anshuman.khandual@arm.com; dmarc=pass (policy=none) header.from=arm.com X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: C5D4D40025 X-Stat-Signature: 386791cjnwumwmw4qp6qf6dk1ry5cqrg X-HE-Tag: 1643029098-890052 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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: Yoshinori Sato Cc: Rich Felker Cc: linux-sh@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual --- arch/sh/Kconfig | 1 + arch/sh/include/asm/pgtable.h | 17 -------------- arch/sh/mm/mmap.c | 43 +++++++++++++++++++++++++++++++++++ 3 files changed, 44 insertions(+), 17 deletions(-) diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index 2474a04ceac4..f3fcd1c5e002 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -11,6 +11,7 @@ config SUPERH select ARCH_HAS_GCOV_PROFILE_ALL select ARCH_HAS_PTE_SPECIAL select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST + select ARCH_HAS_VM_GET_PAGE_PROT select ARCH_HIBERNATION_POSSIBLE if MMU select ARCH_MIGHT_HAVE_PC_PARPORT select ARCH_WANT_IPC_PARSE_VERSION diff --git a/arch/sh/include/asm/pgtable.h b/arch/sh/include/asm/pgtable.h index d7ddb1ec86a0..6fb9ec54cf9b 100644 --- a/arch/sh/include/asm/pgtable.h +++ b/arch/sh/include/asm/pgtable.h @@ -89,23 +89,6 @@ static inline unsigned long phys_addr_mask(void) * completely separate permission bits for user and kernel space. */ /*xwr*/ -#define __P000 PAGE_NONE -#define __P001 PAGE_READONLY -#define __P010 PAGE_COPY -#define __P011 PAGE_COPY -#define __P100 PAGE_EXECREAD -#define __P101 PAGE_EXECREAD -#define __P110 PAGE_COPY -#define __P111 PAGE_COPY - -#define __S000 PAGE_NONE -#define __S001 PAGE_READONLY -#define __S010 PAGE_WRITEONLY -#define __S011 PAGE_SHARED -#define __S100 PAGE_EXECREAD -#define __S101 PAGE_EXECREAD -#define __S110 PAGE_RWX -#define __S111 PAGE_RWX typedef pte_t *pte_addr_t; diff --git a/arch/sh/mm/mmap.c b/arch/sh/mm/mmap.c index 6a1a1297baae..21b3fae77a4e 100644 --- a/arch/sh/mm/mmap.c +++ b/arch/sh/mm/mmap.c @@ -162,3 +162,46 @@ int valid_mmap_phys_addr_range(unsigned long pfn, size_t size) { return 1; } + +#ifdef CONFIG_MMU +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; + case VM_WRITE: + return PAGE_COPY; + case VM_READ | VM_WRITE: + return PAGE_COPY; + case VM_EXEC: + return PAGE_EXECREAD; + case VM_EXEC | VM_READ: + return PAGE_EXECREAD; + case VM_EXEC | VM_WRITE: + return PAGE_COPY; + case VM_EXEC | VM_READ | VM_WRITE: + return PAGE_COPY; + case VM_SHARED: + return PAGE_COPY; + case VM_SHARED | VM_READ: + return PAGE_READONLY; + case VM_SHARED | VM_WRITE: + return PAGE_WRITEONLY; + case VM_SHARED | VM_READ | VM_WRITE: + return PAGE_SHARED; + case VM_SHARED | VM_EXEC: + return PAGE_EXECREAD; + case VM_SHARED | VM_EXEC | VM_READ: + return PAGE_EXECREAD; + case VM_SHARED | VM_EXEC | VM_WRITE: + return PAGE_RWX; + case VM_SHARED | VM_EXEC | VM_READ | VM_WRITE: + return PAGE_RWX; + default: + BUILD_BUG(); + } +} +EXPORT_SYMBOL(vm_get_page_prot); +#endif