From patchwork Mon Jan 24 12:56:55 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 1583444 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=CPhLXu8r; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=lists.infradead.org (client-ip=2607:7c80:54:e::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:e::133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by bilbo.ozlabs.org (Postfix) with ESMTPS id 4Jj95d0c4nz9t0k for ; Mon, 24 Jan 2022 23:58:29 +1100 (AEDT) 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:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id: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=P3CPUEaNMYs1Ib4HySpyWFn81tmBPhE9m2QycOY2kKw=; b=CPhLXu8rJpeVSN K7jWt2AuXOp1vGUl6LXwvznKqbP9K5rc8aZkQXfFVDzyB3wwjxgJxBzGzKBcKSiAcAThy9CFRlKs0 D5bzKtU8JgZU9Ju9pyiOPaoTTb6ovvqrDWoPZoFrA+fqwG8UAg+5fsDCwhCvoDBkiYP7J2a3zfHCZ YkaBGp0OFwXSQcaefsBpqsh7mlgZ0m/vKtAr5Uyxj0LYIez4qptHhbLDtYni/mLJy8P2j1pbYuWnA QhsnUaVnjUjwz2B67FQiJQXviVgNaRFVnc02JU77CEt7H9FE6dK/21jxkNrETPwjbQVTDPF3lKmzR ISszYmMuoFSNEZzzi+uw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nByvR-003L8P-RJ; Mon, 24 Jan 2022 12:58:25 +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 1nByvO-003L62-OW for linux-snps-arc@lists.infradead.org; Mon, 24 Jan 2022 12:58:24 +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 49FD9113E; Mon, 24 Jan 2022 04:58:22 -0800 (PST) Received: from p8cg001049571a15.arm.com (unknown [10.163.43.190]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 09B913F774; Mon, 24 Jan 2022 04:58:18 -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 , Vineet Gupta , linux-snps-arc@lists.infradead.org Subject: [RFC V1 18/31] arc/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Date: Mon, 24 Jan 2022 18:26:55 +0530 Message-Id: <1643029028-12710-19-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> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220124_045822_911328_2CAEC9F2 X-CRM114-Status: UNSURE ( 9.04 ) 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 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: Vineet Gupta Cc: linux-snps-arc@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual --- arch/arc/Kconfig | 1 + arc [...] 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: , MIME-Version: 1.0 Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.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: 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 | 17 ---------- arch/arc/mm/mmap.c | 41 +++++++++++++++++++++++ 3 files changed, 42 insertions(+), 17 deletions(-) diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index 3c2a4753d09b..78ff0644b343 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..798308f4dbad 100644 --- a/arch/arc/include/asm/pgtable-bits-arcv2.h +++ b/arch/arc/include/asm/pgtable-bits-arcv2.h @@ -72,23 +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__ diff --git a/arch/arc/mm/mmap.c b/arch/arc/mm/mmap.c index 722d26b94307..860b2fc91f55 100644 --- a/arch/arc/mm/mmap.c +++ b/arch/arc/mm/mmap.c @@ -74,3 +74,44 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr, info.align_offset = pgoff << PAGE_SHIFT; return vm_unmapped_area(&info); } + +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_U_NONE; + case VM_READ: + return PAGE_U_R; + case VM_WRITE: + return PAGE_U_R; + case VM_READ | VM_WRITE: + return PAGE_U_R; + case VM_EXEC: + return PAGE_U_X_R; + case VM_EXEC | VM_READ: + return PAGE_U_X_R; + case VM_EXEC | VM_WRITE: + return PAGE_U_X_R; + case VM_EXEC | VM_READ | VM_WRITE: + return PAGE_U_X_R; + case VM_SHARED: + return PAGE_U_NONE; + case VM_SHARED | VM_READ: + return PAGE_U_R; + case VM_SHARED | VM_WRITE: + return PAGE_U_W_R; + case VM_SHARED | VM_READ | VM_WRITE: + return PAGE_U_W_R; + case VM_SHARED | VM_EXEC: + return PAGE_U_X_R; + case VM_SHARED | VM_EXEC | VM_READ: + return PAGE_U_X_R; + case VM_SHARED | VM_EXEC | VM_WRITE: + return PAGE_U_X_W_R; + case VM_SHARED | VM_EXEC | VM_READ | VM_WRITE: + return PAGE_U_X_W_R; + default: + BUILD_BUG(); + } +} +EXPORT_SYMBOL(vm_get_page_prot);