From patchwork Mon Jan 24 12:57:03 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 12722089 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 084A8C43217 for ; Mon, 24 Jan 2022 12:58:57 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 9CA356B00BC; Mon, 24 Jan 2022 07:58:56 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 979D56B00BD; Mon, 24 Jan 2022 07:58:56 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 868E76B00BE; Mon, 24 Jan 2022 07:58:56 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0212.hostedemail.com [216.40.44.212]) by kanga.kvack.org (Postfix) with ESMTP id 787526B00BC for ; Mon, 24 Jan 2022 07:58:56 -0500 (EST) Received: from smtpin08.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 34D58182B1DCF for ; Mon, 24 Jan 2022 12:58:56 +0000 (UTC) X-FDA: 79065185472.08.2727306 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by imf03.hostedemail.com (Postfix) with ESMTP id 7F59F20017 for ; Mon, 24 Jan 2022 12:58:55 +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 1CAC111D4; Mon, 24 Jan 2022 04:58:55 -0800 (PST) Received: from p8cg001049571a15.arm.com (unknown [10.163.43.190]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id DF0203F774; Mon, 24 Jan 2022 04:58:51 -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 , Brian Cain , linux-hexagon@vger.kernel.org Subject: [RFC V1 26/31] hexagon/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Date: Mon, 24 Jan 2022 18:27:03 +0530 Message-Id: <1643029028-12710-27-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-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 7F59F20017 X-Stat-Signature: 8ykoiruhguzbzsrn76mj7wqaxw4wd5rz Authentication-Results: imf03.hostedemail.com; dkim=none; dmarc=pass (policy=none) header.from=arm.com; spf=pass (imf03.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: nil X-HE-Tag: 1643029135-937501 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: Brian Cain Cc: linux-hexagon@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual --- arch/hexagon/Kconfig | 1 + arch/hexagon/include/asm/pgtable.h | 24 ----------------- arch/hexagon/mm/init.c | 42 ++++++++++++++++++++++++++++++ 3 files changed, 43 insertions(+), 24 deletions(-) diff --git a/arch/hexagon/Kconfig b/arch/hexagon/Kconfig index 15dd8f38b698..cdc5df32a1e3 100644 --- a/arch/hexagon/Kconfig +++ b/arch/hexagon/Kconfig @@ -6,6 +6,7 @@ config HEXAGON def_bool y select ARCH_32BIT_OFF_T select ARCH_HAS_SYNC_DMA_FOR_DEVICE + select ARCH_HAS_VM_GET_PAGE_PROT select ARCH_NO_PREEMPT select DMA_GLOBAL_POOL # Other pending projects/to-do items. diff --git a/arch/hexagon/include/asm/pgtable.h b/arch/hexagon/include/asm/pgtable.h index 18cd6ea9ab23..5eceddfe013d 100644 --- a/arch/hexagon/include/asm/pgtable.h +++ b/arch/hexagon/include/asm/pgtable.h @@ -127,31 +127,7 @@ extern unsigned long _dflt_cache_att; #define CACHEDEF (CACHE_DEFAULT << 6) /* Private (copy-on-write) page protections. */ -#define __P000 __pgprot(_PAGE_PRESENT | _PAGE_USER | CACHEDEF) -#define __P001 __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | CACHEDEF) -#define __P010 __P000 /* Write-only copy-on-write */ -#define __P011 __P001 /* Read/Write copy-on-write */ -#define __P100 __pgprot(_PAGE_PRESENT | _PAGE_USER | \ - _PAGE_EXECUTE | CACHEDEF) -#define __P101 __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_EXECUTE | \ - _PAGE_READ | CACHEDEF) -#define __P110 __P100 /* Write/execute copy-on-write */ -#define __P111 __P101 /* Read/Write/Execute, copy-on-write */ - /* Shared page protections. */ -#define __S000 __P000 -#define __S001 __P001 -#define __S010 __pgprot(_PAGE_PRESENT | _PAGE_USER | \ - _PAGE_WRITE | CACHEDEF) -#define __S011 __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | \ - _PAGE_WRITE | CACHEDEF) -#define __S100 __pgprot(_PAGE_PRESENT | _PAGE_USER | \ - _PAGE_EXECUTE | CACHEDEF) -#define __S101 __P101 -#define __S110 __pgprot(_PAGE_PRESENT | _PAGE_USER | \ - _PAGE_EXECUTE | _PAGE_WRITE | CACHEDEF) -#define __S111 __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | \ - _PAGE_EXECUTE | _PAGE_WRITE | CACHEDEF) extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; /* located in head.S */ diff --git a/arch/hexagon/mm/init.c b/arch/hexagon/mm/init.c index f01e91e10d95..9f411e3eba68 100644 --- a/arch/hexagon/mm/init.c +++ b/arch/hexagon/mm/init.c @@ -236,3 +236,45 @@ void __init setup_arch_memory(void) * which is called by start_kernel() later on in the process */ } + +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 __pgprot(_PAGE_PRESENT|_PAGE_USER|CACHEDEF); + case VM_READ: + return __pgprot(_PAGE_PRESENT|_PAGE_USER|_PAGE_READ|CACHEDEF); + case VM_WRITE: + return __pgprot(_PAGE_PRESENT|_PAGE_USER|CACHEDEF); + case VM_READ | VM_WRITE: + return __pgprot(_PAGE_PRESENT|_PAGE_USER|_PAGE_READ|CACHEDEF); + case VM_EXEC: + return __pgprot(_PAGE_PRESENT|_PAGE_USER|_PAGE_EXECUTE|CACHEDEF); + case VM_EXEC | VM_READ: + return __pgprot(_PAGE_PRESENT|_PAGE_USER|_PAGE_EXECUTE|_PAGE_READ|CACHEDEF); + case VM_EXEC | VM_WRITE: + return __pgprot(_PAGE_PRESENT|_PAGE_USER|_PAGE_EXECUTE|CACHEDEF); + case VM_EXEC | VM_READ | VM_WRITE: + return __pgprot(_PAGE_PRESENT|_PAGE_USER|_PAGE_EXECUTE|_PAGE_READ|CACHEDEF); + case VM_SHARED: + return __pgprot(_PAGE_PRESENT|_PAGE_USER|CACHEDEF); + case VM_SHARED | VM_READ: + return __pgprot(_PAGE_PRESENT|_PAGE_USER|_PAGE_READ|CACHEDEF); + case VM_SHARED | VM_WRITE: + return __pgprot(_PAGE_PRESENT|_PAGE_USER|_PAGE_WRITE|CACHEDEF); + case VM_SHARED | VM_READ | VM_WRITE: + return __pgprot(_PAGE_PRESENT|_PAGE_USER|_PAGE_READ|_PAGE_WRITE|CACHEDEF); + case VM_SHARED | VM_EXEC: + return __pgprot(_PAGE_PRESENT|_PAGE_USER|_PAGE_EXECUTE|CACHEDEF); + case VM_SHARED | VM_EXEC | VM_READ: + return __pgprot(_PAGE_PRESENT|_PAGE_USER|_PAGE_EXECUTE|_PAGE_READ|CACHEDEF); + case VM_SHARED | VM_EXEC | VM_WRITE: + return __pgprot(_PAGE_PRESENT|_PAGE_USER|_PAGE_EXECUTE|_PAGE_WRITE|CACHEDEF); + case VM_SHARED | VM_EXEC | VM_READ | VM_WRITE: + return __pgprot(_PAGE_PRESENT|_PAGE_USER|_PAGE_READ|_PAGE_EXECUTE|_PAGE_WRITE| + CACHEDEF); + default: + BUILD_BUG(); + } +} +EXPORT_SYMBOL(vm_get_page_prot);