From patchwork Mon Jul 11 07:05:56 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 1654767 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (2048-bit key; secure) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=OAMaSuxa; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=lists.infradead.org (client-ip=2607:7c80:54:3::133; helo=bombadil.infradead.org; envelope-from=linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org; receiver=) Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by bilbo.ozlabs.org (Postfix) with ESMTPS id 4LhFfJ6DZGz9s07 for ; Mon, 11 Jul 2022 17:20:40 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=N/RSvCy75mZaameVvc0VAqUABTOtZa6JJHCM4vpZaZM=; b=OAMaSuxamrd4ZP GIEyKEF+xHqBsJ7v9XpQR2CLprHHjJrBm3ZnAyWpgYoGv9+MsWCCAFJ13xzvYlvrPBi0B5svErS+i mOucjpheqU9sys/o3YKHJkmBOO5ZfKxM6kkY0hcGIR53+q4Xu9omC3HIxgT8RlHTfQmVzR+nfYS7P HPK6S1LmCkW8MQ6o1qENXwcwD3cm2l4A230hjQH/fIAwWI7LRyjHhw6PB+XxeEfw6+SZH73uvjOch rtOvB23fJ9/0PsaH71QDnpkIUFX1uKXHcIq3zFeNwde5MEsSB+Ttys2GgY6mqtIYfAFZTQpGsm6SF yf873mu8da3aTtZ+6uXQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oAnif-00Gkau-SF; Mon, 11 Jul 2022 07:20:37 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oAnXo-00Gd7B-SW; Mon, 11 Jul 2022 07:09:27 +0000 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 41507175D; Mon, 11 Jul 2022 00:09:24 -0700 (PDT) Received: from a077893.arm.com (unknown [10.163.45.183]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id EF9A73F70D; Mon, 11 Jul 2022 00:09:15 -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, Vineet Gupta Subject: [PATCH V7 22/26] arc/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Date: Mon, 11 Jul 2022 12:35:56 +0530 Message-Id: <20220711070600.2378316-23-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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220711_000925_092373_6E8BCCCE X-CRM114-Status: UNSURE ( 8.48 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -5.0 (-----) X-Spam-Report: Spam detection software, running on the system "bombadil.infradead.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: 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. [...] Content analysis details: (-5.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at https://www.dnswl.org/, high trust [217.140.110.172 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org 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: Vineet Gupta Cc: linux-snps-arc@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual --- arch/arc/Kconfig | 1 + arch/arc/include/asm/pgtable-bits-arcv2.h | 18 ------------------ arch/arc/mm/mmap.c | 20 ++++++++++++++++++++ 3 files changed, 21 insertions(+), 18 deletions(-) diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index 9e3653253ef2..8be56a5d8a9b 100644 --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -13,6 +13,7 @@ config ARC select ARCH_HAS_SETUP_DMA_OPS select ARCH_HAS_SYNC_DMA_FOR_CPU select ARCH_HAS_SYNC_DMA_FOR_DEVICE + select ARCH_HAS_VM_GET_PAGE_PROT select ARCH_SUPPORTS_ATOMIC_RMW if ARC_HAS_LLSC select ARCH_32BIT_OFF_T select BUILDTIME_TABLE_SORT diff --git a/arch/arc/include/asm/pgtable-bits-arcv2.h b/arch/arc/include/asm/pgtable-bits-arcv2.h index 183d23bc1e00..b23be557403e 100644 --- a/arch/arc/include/asm/pgtable-bits-arcv2.h +++ b/arch/arc/include/asm/pgtable-bits-arcv2.h @@ -72,24 +72,6 @@ * This is to enable COW mechanism */ /* xwr */ -#define __P000 PAGE_U_NONE -#define __P001 PAGE_U_R -#define __P010 PAGE_U_R /* Pvt-W => !W */ -#define __P011 PAGE_U_R /* Pvt-W => !W */ -#define __P100 PAGE_U_X_R /* X => R */ -#define __P101 PAGE_U_X_R -#define __P110 PAGE_U_X_R /* Pvt-W => !W and X => R */ -#define __P111 PAGE_U_X_R /* Pvt-W => !W */ - -#define __S000 PAGE_U_NONE -#define __S001 PAGE_U_R -#define __S010 PAGE_U_W_R /* W => R */ -#define __S011 PAGE_U_W_R -#define __S100 PAGE_U_X_R /* X => R */ -#define __S101 PAGE_U_X_R -#define __S110 PAGE_U_X_W_R /* X => R */ -#define __S111 PAGE_U_X_W_R - #ifndef __ASSEMBLY__ #define pte_write(pte) (pte_val(pte) & _PAGE_WRITE) diff --git a/arch/arc/mm/mmap.c b/arch/arc/mm/mmap.c index 722d26b94307..fce5fa2b4f52 100644 --- a/arch/arc/mm/mmap.c +++ b/arch/arc/mm/mmap.c @@ -74,3 +74,23 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr, info.align_offset = pgoff << PAGE_SHIFT; return vm_unmapped_area(&info); } + +static const pgprot_t protection_map[16] = { + [VM_NONE] = PAGE_U_NONE, + [VM_READ] = PAGE_U_R, + [VM_WRITE] = PAGE_U_R, + [VM_WRITE | VM_READ] = PAGE_U_R, + [VM_EXEC] = PAGE_U_X_R, + [VM_EXEC | VM_READ] = PAGE_U_X_R, + [VM_EXEC | VM_WRITE] = PAGE_U_X_R, + [VM_EXEC | VM_WRITE | VM_READ] = PAGE_U_X_R, + [VM_SHARED] = PAGE_U_NONE, + [VM_SHARED | VM_READ] = PAGE_U_R, + [VM_SHARED | VM_WRITE] = PAGE_U_W_R, + [VM_SHARED | VM_WRITE | VM_READ] = PAGE_U_W_R, + [VM_SHARED | VM_EXEC] = PAGE_U_X_R, + [VM_SHARED | VM_EXEC | VM_READ] = PAGE_U_X_R, + [VM_SHARED | VM_EXEC | VM_WRITE] = PAGE_U_X_W_R, + [VM_SHARED | VM_EXEC | VM_WRITE | VM_READ] = PAGE_U_X_W_R +}; +DECLARE_VM_GET_PAGE_PROT