From patchwork Thu Apr 14 06:21:19 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 12812942 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 AB489C433F5 for ; Thu, 14 Apr 2022 06:21:05 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 10EAE6B0073; Thu, 14 Apr 2022 02:21:05 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 0C8F66B0074; Thu, 14 Apr 2022 02:21:05 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id EA0A16B0075; Thu, 14 Apr 2022 02:21:04 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (relay.hostedemail.com [64.99.140.25]) by kanga.kvack.org (Postfix) with ESMTP id DBFD06B0073 for ; Thu, 14 Apr 2022 02:21:04 -0400 (EDT) Received: from smtpin10.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id B06AE25AE8 for ; Thu, 14 Apr 2022 06:21:04 +0000 (UTC) X-FDA: 79354486848.10.351C7FA Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by imf13.hostedemail.com (Postfix) with ESMTP id 48BCE20005 for ; Thu, 14 Apr 2022 06:21:04 +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 91AE41424; Wed, 13 Apr 2022 23:21:03 -0700 (PDT) Received: from a077893.arm.com (unknown [10.163.37.202]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 863553F70D; Wed, 13 Apr 2022 23:20:57 -0700 (PDT) From: Anshuman Khandual To: linux-mm@kvack.org, akpm@linux-foundation.org Cc: christophe.leroy@csgroup.eu, catalin.marinas@arm.com, Anshuman Khandual , Christoph Hellwig , linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, sparclinux@vger.kernel.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH V7 1/7] mm/mmap: Add new config ARCH_HAS_VM_GET_PAGE_PROT Date: Thu, 14 Apr 2022 11:51:19 +0530 Message-Id: <20220414062125.609297-2-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220414062125.609297-1-anshuman.khandual@arm.com> References: <20220414062125.609297-1-anshuman.khandual@arm.com> MIME-Version: 1.0 X-Rspam-User: Authentication-Results: imf13.hostedemail.com; dkim=none; spf=pass (imf13.hostedemail.com: domain of anshuman.khandual@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=anshuman.khandual@arm.com; dmarc=pass (policy=none) header.from=arm.com X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 48BCE20005 X-Stat-Signature: 71rz3tujhjjy6kaz6ozcmbyd7zkwfg6c X-HE-Tag: 1649917264-716318 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: Add a new config ARCH_HAS_VM_GET_PAGE_PROT, which when subscribed enables a given platform to define its own vm_get_page_prot() but still utilizing the generic protection_map[] array. Cc: Andrew Morton Cc: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org Reviewed-by: Christophe Leroy Reviewed-by: Catalin Marinas Suggested-by: Christoph Hellwig Signed-off-by: Anshuman Khandual --- mm/Kconfig | 3 +++ mm/mmap.c | 2 ++ 2 files changed, 5 insertions(+) diff --git a/mm/Kconfig b/mm/Kconfig index 034d87953600..b1f7624276f8 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -765,6 +765,9 @@ config ARCH_HAS_CURRENT_STACK_POINTER config ARCH_HAS_FILTER_PGPROT bool +config ARCH_HAS_VM_GET_PAGE_PROT + bool + config ARCH_HAS_PTE_DEVMAP bool diff --git a/mm/mmap.c b/mm/mmap.c index 3aa839f81e63..87cb2eaf7e1a 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -106,6 +106,7 @@ pgprot_t protection_map[16] __ro_after_init = { __S000, __S001, __S010, __S011, __S100, __S101, __S110, __S111 }; +#ifndef CONFIG_ARCH_HAS_VM_GET_PAGE_PROT #ifndef CONFIG_ARCH_HAS_FILTER_PGPROT static inline pgprot_t arch_filter_pgprot(pgprot_t prot) { @@ -122,6 +123,7 @@ pgprot_t vm_get_page_prot(unsigned long vm_flags) return arch_filter_pgprot(ret); } EXPORT_SYMBOL(vm_get_page_prot); +#endif /* CONFIG_ARCH_HAS_VM_GET_PAGE_PROT */ static pgprot_t vm_pgprot_modify(pgprot_t oldprot, unsigned long vm_flags) {