From patchwork Mon Feb 14 02:30:44 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 12744813 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 81F56C433F5 for ; Mon, 14 Feb 2022 02:32:09 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 16D236B009A; Sun, 13 Feb 2022 21:32:09 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 11D9A6B009B; Sun, 13 Feb 2022 21:32:09 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id F001E6B009C; Sun, 13 Feb 2022 21:32:08 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (relay.hostedemail.com [64.99.140.28]) by kanga.kvack.org (Postfix) with ESMTP id E0EF36B009A for ; Sun, 13 Feb 2022 21:32:08 -0500 (EST) Received: from smtpin01.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id AD6D220C39 for ; Mon, 14 Feb 2022 02:32:08 +0000 (UTC) X-FDA: 79139810736.01.5CA85DC Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by imf11.hostedemail.com (Postfix) with ESMTP id 336E340002 for ; Mon, 14 Feb 2022 02:32:08 +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 B74F6106F; Sun, 13 Feb 2022 18:32:07 -0800 (PST) Received: from p8cg001049571a15.arm.com (unknown [10.163.47.15]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 372503F718; Sun, 13 Feb 2022 18:32:04 -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, "James E.J. Bottomley" , linux-parisc@vger.kernel.org Subject: [PATCH 21/30] parisc/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Date: Mon, 14 Feb 2022 08:00:44 +0530 Message-Id: <1644805853-21338-22-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> Authentication-Results: imf11.hostedemail.com; dkim=none; dmarc=pass (policy=none) header.from=arm.com; spf=pass (imf11.hostedemail.com: domain of anshuman.khandual@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=anshuman.khandual@arm.com X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 336E340002 X-Stat-Signature: j98rsreg1mzgkp9zoaxtme5z665odih8 X-HE-Tag: 1644805928-278978 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: "James E.J. Bottomley" Cc: linux-parisc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual --- arch/parisc/Kconfig | 1 + arch/parisc/include/asm/pgtable.h | 20 ---------------- arch/parisc/mm/init.c | 40 +++++++++++++++++++++++++++++++ 3 files changed, 41 insertions(+), 20 deletions(-) diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig index 43c1c880def6..de512f120b50 100644 --- a/arch/parisc/Kconfig +++ b/arch/parisc/Kconfig @@ -10,6 +10,7 @@ config PARISC select ARCH_HAS_ELF_RANDOMIZE select ARCH_HAS_STRICT_KERNEL_RWX select ARCH_HAS_UBSAN_SANITIZE_ALL + select ARCH_HAS_VM_GET_PAGE_PROT select ARCH_NO_SG_CHAIN select ARCH_SUPPORTS_HUGETLBFS if PA20 select ARCH_SUPPORTS_MEMORY_FAILURE diff --git a/arch/parisc/include/asm/pgtable.h b/arch/parisc/include/asm/pgtable.h index 3e7cf882639f..80d99b2b5913 100644 --- a/arch/parisc/include/asm/pgtable.h +++ b/arch/parisc/include/asm/pgtable.h @@ -269,26 +269,6 @@ extern void __update_cache(pte_t pte); * pages. */ - /*xwr*/ -#define __P000 PAGE_NONE -#define __P001 PAGE_READONLY -#define __P010 __P000 /* copy on write */ -#define __P011 __P001 /* copy on write */ -#define __P100 PAGE_EXECREAD -#define __P101 PAGE_EXECREAD -#define __P110 __P100 /* copy on write */ -#define __P111 __P101 /* copy on write */ - -#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 - - extern pgd_t swapper_pg_dir[]; /* declared in init_task.c */ /* initial page tables for 0-8MB for kernel */ diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c index 1ae31db9988f..4c7da4d79c52 100644 --- a/arch/parisc/mm/init.c +++ b/arch/parisc/mm/init.c @@ -866,3 +866,43 @@ void flush_tlb_all(void) spin_unlock(&sid_lock); } #endif + +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; + /* copy on write */ + case VM_WRITE: + return PAGE_NONE; + /* copy on write */ + case VM_WRITE | VM_READ: + return PAGE_READONLY; + case VM_EXEC: + case VM_EXEC | VM_READ: + /* copy on write */ + case VM_EXEC | VM_WRITE: + /* copy on write */ + case VM_EXEC | VM_WRITE | VM_READ: + return PAGE_EXECREAD; + case VM_SHARED: + return PAGE_NONE; + case VM_SHARED | VM_READ: + return PAGE_READONLY; + case VM_SHARED | VM_WRITE: + return PAGE_WRITEONLY; + case VM_SHARED | VM_WRITE | VM_READ: + return PAGE_SHARED; + case VM_SHARED | VM_EXEC: + case VM_SHARED | VM_EXEC | VM_READ: + return PAGE_EXECREAD; + case VM_SHARED | VM_EXEC | VM_WRITE: + case VM_SHARED | VM_EXEC | VM_WRITE | VM_READ: + return PAGE_RWX; + default: + BUILD_BUG(); + } +} +EXPORT_SYMBOL(vm_get_page_prot);