From patchwork Mon Jul 11 07:05:44 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 12912865 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 208B9CCA487 for ; Mon, 11 Jul 2022 07:07:45 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id AE04F90000C; Mon, 11 Jul 2022 03:07:44 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id A90E1900002; Mon, 11 Jul 2022 03:07:44 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 9807A90000C; Mon, 11 Jul 2022 03:07:44 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id 88E68900002 for ; Mon, 11 Jul 2022 03:07:44 -0400 (EDT) Received: from smtpin21.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id 623FE34900 for ; Mon, 11 Jul 2022 07:07:44 +0000 (UTC) X-FDA: 79673938848.21.240A214 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by imf22.hostedemail.com (Postfix) with ESMTP id E5AF2C0067 for ; Mon, 11 Jul 2022 07:07:43 +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 BD592168F; Mon, 11 Jul 2022 00:07:43 -0700 (PDT) Received: from a077893.arm.com (unknown [10.163.45.183]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id C6B083F70D; Mon, 11 Jul 2022 00:07:35 -0700 (PDT) From: Anshuman Khandual To: linux-mm@kvack.org, akpm@linux-foundation.org Cc: hch@infradead.org, christophe.leroy@csgroup.eu, Anshuman Khandual , linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org, x86@kernel.org, openrisc@lists.librecores.org, linux-xtensa@linux-xtensa.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-parisc@vger.kernel.org, linux-alpha@vger.kernel.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-ia64@vger.kernel.org, linux-mips@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-um@lists.infradead.org, linux-sh@vger.kernel.org, linux-kernel@vger.kernel.org, Jonas Bonn , Stafford Horne Subject: [PATCH V7 10/26] openrisc/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Date: Mon, 11 Jul 2022 12:35:44 +0530 Message-Id: <20220711070600.2378316-11-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220711070600.2378316-1-anshuman.khandual@arm.com> References: <20220711070600.2378316-1-anshuman.khandual@arm.com> MIME-Version: 1.0 ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1657523264; a=rsa-sha256; cv=none; b=7aa9w4ZenfMLTL4HuRP4hXft0dSLNqFB8MeV5XNUh/W/cVmKYN/085BLoDD5Tutb8V+Z0S tlTTt0eeKH9mEm5ysVKQVN440z+vmgdU8MygnzzyVr29qjt+OvKB0XR8GOo+KOay0qqlN8 8z0GVCdUBYDBCJ3v5d/Jgb1Zv5/i+jY= ARC-Authentication-Results: i=1; imf22.hostedemail.com; dkim=none; dmarc=pass (policy=none) header.from=arm.com; spf=pass (imf22.hostedemail.com: domain of anshuman.khandual@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=anshuman.khandual@arm.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1657523264; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=6NMEaGr5btihyq1gVcbPVATOTanm+H1nlEFGDv/JOHw=; b=HAX6WYoGEYcLgH4K7W9N8IFlRL1kxze1N4lNX/yZuWYmmJVPJA1hid4TfYW4WToZRhOIfs R4X6YjSNxJniryFPqlQTVvfp8WpicKy5GVzzmATaGROkaZ5DEMLSmACmX3aLHns2hRpbz8 chJxR8FllWD2sch2aXG8494eQGoNB98= Authentication-Results: imf22.hostedemail.com; dkim=none; dmarc=pass (policy=none) header.from=arm.com; spf=pass (imf22.hostedemail.com: domain of anshuman.khandual@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=anshuman.khandual@arm.com X-Stat-Signature: h78hmke18qfyikt7pmzqyn7enat1qwhr X-Rspamd-Queue-Id: E5AF2C0067 X-Rspam-User: X-Rspamd-Server: rspam11 X-HE-Tag: 1657523263-192304 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 enables ARCH_HAS_VM_GET_PAGE_PROT on the platform and exports standard vm_get_page_prot() implementation via DECLARE_VM_GET_PAGE_PROT, which looks up a private and static protection_map[] array. Subsequently all __SXXX and __PXXX macros can be dropped which are no longer needed. Cc: Jonas Bonn Cc: openrisc@lists.librecores.org Cc: linux-kernel@vger.kernel.org Acked-by: Stafford Horne Signed-off-by: Anshuman Khandual --- arch/openrisc/Kconfig | 1 + arch/openrisc/include/asm/pgtable.h | 18 ------------------ arch/openrisc/mm/init.c | 20 ++++++++++++++++++++ 3 files changed, 21 insertions(+), 18 deletions(-) diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig index e814df4c483c..fe0dfb50eb86 100644 --- a/arch/openrisc/Kconfig +++ b/arch/openrisc/Kconfig @@ -10,6 +10,7 @@ config OPENRISC select ARCH_HAS_DMA_SET_UNCACHED select ARCH_HAS_DMA_CLEAR_UNCACHED select ARCH_HAS_SYNC_DMA_FOR_DEVICE + select ARCH_HAS_VM_GET_PAGE_PROT select COMMON_CLK select OF select OF_EARLY_FLATTREE diff --git a/arch/openrisc/include/asm/pgtable.h b/arch/openrisc/include/asm/pgtable.h index c3abbf71e09f..dcae8aea132f 100644 --- a/arch/openrisc/include/asm/pgtable.h +++ b/arch/openrisc/include/asm/pgtable.h @@ -176,24 +176,6 @@ extern void paging_init(void); __pgprot(_PAGE_ALL | _PAGE_SRE | _PAGE_SWE \ | _PAGE_SHARED | _PAGE_DIRTY | _PAGE_EXEC | _PAGE_CI) -#define __P000 PAGE_NONE -#define __P001 PAGE_READONLY_X -#define __P010 PAGE_COPY -#define __P011 PAGE_COPY_X -#define __P100 PAGE_READONLY -#define __P101 PAGE_READONLY_X -#define __P110 PAGE_COPY -#define __P111 PAGE_COPY_X - -#define __S000 PAGE_NONE -#define __S001 PAGE_READONLY_X -#define __S010 PAGE_SHARED -#define __S011 PAGE_SHARED_X -#define __S100 PAGE_READONLY -#define __S101 PAGE_READONLY_X -#define __S110 PAGE_SHARED -#define __S111 PAGE_SHARED_X - /* zero page used for uninitialized stuff */ extern unsigned long empty_zero_page[2048]; #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) diff --git a/arch/openrisc/mm/init.c b/arch/openrisc/mm/init.c index 3a021ab6f1ae..d531ab82be12 100644 --- a/arch/openrisc/mm/init.c +++ b/arch/openrisc/mm/init.c @@ -208,3 +208,23 @@ void __init mem_init(void) mem_init_done = 1; return; } + +static const pgprot_t protection_map[16] = { + [VM_NONE] = PAGE_NONE, + [VM_READ] = PAGE_READONLY_X, + [VM_WRITE] = PAGE_COPY, + [VM_WRITE | VM_READ] = PAGE_COPY_X, + [VM_EXEC] = PAGE_READONLY, + [VM_EXEC | VM_READ] = PAGE_READONLY_X, + [VM_EXEC | VM_WRITE] = PAGE_COPY, + [VM_EXEC | VM_WRITE | VM_READ] = PAGE_COPY_X, + [VM_SHARED] = PAGE_NONE, + [VM_SHARED | VM_READ] = PAGE_READONLY_X, + [VM_SHARED | VM_WRITE] = PAGE_SHARED, + [VM_SHARED | VM_WRITE | VM_READ] = PAGE_SHARED_X, + [VM_SHARED | VM_EXEC] = PAGE_READONLY, + [VM_SHARED | VM_EXEC | VM_READ] = PAGE_READONLY_X, + [VM_SHARED | VM_EXEC | VM_WRITE] = PAGE_SHARED, + [VM_SHARED | VM_EXEC | VM_WRITE | VM_READ] = PAGE_SHARED_X +}; +DECLARE_VM_GET_PAGE_PROT