From patchwork Mon Feb 28 10:47:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 12762843 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CC7D6C433F5 for ; Mon, 28 Feb 2022 10:50:35 +0000 (UTC) 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=FPZPBGCDEAWh7G1iU0ZBgw3xjzRh83jyeiJRji3ROgk=; b=3CsZ9yx98DUAgi mbSn+ChjJDCjC5DgBIZrjDPGI/wW7xhEpf7q4A06hEGmWo7/6fiq3jLKykBcZXKSIwxcirSy3US05 BwfMrLc29PruufPR3d2Ld/0CS48agAkM3YFy5QZvu+rNhHokJlgwo1F4ozH7/e30o40QOD6hIpTZ5 Z0dXaYM5tCXObvDgY6c1Wy+D7ji1D1HicEzjJKXMx8UNy8V2SX6XUyL4Y+YMoosZ2jciem7MbS98T s6uhM4bRts8kXG9dOCqZzblUr8PpZTz9Jkc5E9aqsLoWKlabfYMfoBglmJQs9VZ752vWiQB0Ur9Kt BFwbw8+CTfN/rUN99yqA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nOdbp-00BY8y-1v; Mon, 28 Feb 2022 10:50:29 +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 1nOdaZ-00BXIr-C8; Mon, 28 Feb 2022 10:49:12 +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 D1079106F; Mon, 28 Feb 2022 02:49:09 -0800 (PST) Received: from p8cg001049571a15.arm.com (unknown [10.163.47.185]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id B4F8C3F73D; Mon, 28 Feb 2022 02:49:01 -0800 (PST) From: Anshuman Khandual To: linux-mm@kvack.org, akpm@linux-foundation.org Cc: linux-kernel@vger.kernel.org, geert@linux-m68k.org, Anshuman Khandual , Christoph Hellwig , linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, sparclinux@vger.kernel.org, linux-mips@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-s390@vger.kernel.org, linux-riscv@lists.infradead.org, linux-alpha@vger.kernel.org, linux-sh@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-csky@vger.kernel.org, linux-xtensa@linux-xtensa.org, linux-parisc@vger.kernel.org, openrisc@lists.librecores.org, linux-um@lists.infradead.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, linux-arch@vger.kernel.org Subject: [PATCH V3 03/30] mm/mmap: Add new config ARCH_HAS_VM_GET_PAGE_PROT Date: Mon, 28 Feb 2022 16:17:26 +0530 Message-Id: <1646045273-9343-4-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1646045273-9343-1-git-send-email-anshuman.khandual@arm.com> References: <1646045273-9343-1-git-send-email-anshuman.khandual@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220228_024911_469358_38247901 X-CRM114-Status: GOOD ( 10.27 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org 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(). This framework will help remove protection_map[] dependency going forward. Cc: Andrew Morton Cc: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org 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 257ed9c86de3..fa436478a94c 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -747,6 +747,9 @@ config ARCH_HAS_CACHE_LINE_SIZE 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 34000a7d7efa..f2310f6e7466 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -81,6 +81,7 @@ static void unmap_region(struct mm_struct *mm, struct vm_area_struct *vma, struct vm_area_struct *prev, unsigned long start, unsigned long end); +#ifndef CONFIG_ARCH_HAS_VM_GET_PAGE_PROT /* description of effects of mapping type and prot in current implementation. * this is due to the limited x86 page protection hardware. The expected * behavior is in parens: @@ -136,6 +137,7 @@ 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) {