From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3E232C43387 for ; Thu, 10 Jan 2019 15:28:44 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id BA63320685 for ; Thu, 10 Jan 2019 15:28:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BA63320685 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=c-s.fr Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 43b8zF6XZDzDqSn for ; Fri, 11 Jan 2019 02:28:41 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=c-s.fr (client-ip=93.17.236.30; helo=pegase1.c-s.fr; envelope-from=christophe.leroy@c-s.fr; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=c-s.fr Received: from pegase1.c-s.fr (pegase1.c-s.fr [93.17.236.30]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 43b8c046BLzDqk8 for ; Fri, 11 Jan 2019 02:12:00 +1100 (AEDT) Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 43b8bw0FB5z9v0fC; Thu, 10 Jan 2019 16:11:56 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at c-s.fr Received: from pegase1.c-s.fr ([192.168.12.234]) by localhost (pegase1.c-s.fr [192.168.12.234]) (amavisd-new, port 10024) with ESMTP id UNeSJXpWqqtg; Thu, 10 Jan 2019 16:11:55 +0100 (CET) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase1.c-s.fr (Postfix) with ESMTP id 43b8bv6srVz9v0f8; Thu, 10 Jan 2019 16:11:55 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 740CB8B89F; Thu, 10 Jan 2019 16:11:57 +0100 (CET) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id r6tFMXGFAgaO; Thu, 10 Jan 2019 16:11:57 +0100 (CET) Received: from po16846vm.idsi0.si.c-s.fr (unknown [192.168.4.90]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 46B108B898; Thu, 10 Jan 2019 16:11:57 +0100 (CET) Received: by po16846vm.idsi0.si.c-s.fr (Postfix, from userid 0) id 0B7256BF21; Thu, 10 Jan 2019 15:11:57 +0000 (UTC) Message-Id: In-Reply-To: References: From: Christophe Leroy Subject: [PATCH v2 09/15] powerpc/mmu: add is_strict_kernel_rwx() helper To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , j.neuschaefer@gmx.net Date: Thu, 10 Jan 2019 15:11:57 +0000 (UTC) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Add a helper to know whether STRICT_KERNEL_RWX is enabled. This is based on rodata_enabled flag which is defined only when CONFIG_STRICT_KERNEL_RWX is selected. Signed-off-by: Christophe Leroy --- arch/powerpc/include/asm/mmu.h | 11 +++++++++++ arch/powerpc/mm/init_32.c | 4 +--- 2 files changed, 12 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h index 25607604a7a5..f5e27f4a0c29 100644 --- a/arch/powerpc/include/asm/mmu.h +++ b/arch/powerpc/include/asm/mmu.h @@ -289,6 +289,17 @@ static inline u16 get_mm_addr_key(struct mm_struct *mm, unsigned long address) } #endif /* CONFIG_PPC_MEM_KEYS */ +#ifdef CONFIG_STRICT_KERNEL_RWX +static inline bool strict_kernel_rwx_enabled(void) +{ + return rodata_enabled; +} +#else +static inline bool strict_kernel_rwx_enabled(void) +{ + return false; +} +#endif #endif /* !__ASSEMBLY__ */ /* The kernel use the constants below to index in the page sizes array. diff --git a/arch/powerpc/mm/init_32.c b/arch/powerpc/mm/init_32.c index 3e59e5d64b01..ee5a430b9a18 100644 --- a/arch/powerpc/mm/init_32.c +++ b/arch/powerpc/mm/init_32.c @@ -108,12 +108,10 @@ static void __init MMU_setup(void) __map_without_bats = 1; __map_without_ltlbs = 1; } -#ifdef CONFIG_STRICT_KERNEL_RWX - if (rodata_enabled) { + if (strict_kernel_rwx_enabled()) { __map_without_bats = 1; __map_without_ltlbs = 1; } -#endif } /* -- 2.13.3