From patchwork Fri Feb 28 16:18:15 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luca Fancellu X-Patchwork-Id: 13996730 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 lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 6FA4DC282C1 for ; Fri, 28 Feb 2025 16:19:14 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.898962.1307467 (Exim 4.92) (envelope-from ) id 1to34P-000532-IL; Fri, 28 Feb 2025 16:18:37 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 898962.1307467; Fri, 28 Feb 2025 16:18:37 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1to34P-00051p-BC; Fri, 28 Feb 2025 16:18:37 +0000 Received: by outflank-mailman (input) for mailman id 898962; Fri, 28 Feb 2025 16:18:36 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1to34O-0003Ub-6p for xen-devel@lists.xenproject.org; Fri, 28 Feb 2025 16:18:36 +0000 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by se1-gles-sth1.inumbo.com (Halon) with ESMTP id a90cdb05-f5ef-11ef-9aaf-95dc52dad729; Fri, 28 Feb 2025 17:18:35 +0100 (CET) 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 3C2181515; Fri, 28 Feb 2025 08:18:50 -0800 (PST) Received: from e125770.cambridge.arm.com (e125770.arm.com [10.1.199.43]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 19F6B3F5A1; Fri, 28 Feb 2025 08:18:33 -0800 (PST) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: a90cdb05-f5ef-11ef-9aaf-95dc52dad729 From: Luca Fancellu To: xen-devel@lists.xenproject.org Cc: Stefano Stabellini , Julien Grall , Bertrand Marquis , Michal Orzel , Volodymyr Babchuk Subject: [PATCH 7/9] arm/mpu: Introduce MPU memory mapping flags Date: Fri, 28 Feb 2025 16:18:15 +0000 Message-Id: <20250228161817.3342443-8-luca.fancellu@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250228161817.3342443-1-luca.fancellu@arm.com> References: <20250228161817.3342443-1-luca.fancellu@arm.com> MIME-Version: 1.0 Introduce the MPU memory mapping flags in asm/page.h. Signed-off-by: Luca Fancellu --- xen/arch/arm/include/asm/page.h | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/xen/arch/arm/include/asm/page.h b/xen/arch/arm/include/asm/page.h index 69f817d1e68a..22f7d2c6cb30 100644 --- a/xen/arch/arm/include/asm/page.h +++ b/xen/arch/arm/include/asm/page.h @@ -62,6 +62,7 @@ #define MAIRVAL (MAIR1VAL << 32 | MAIR0VAL) +#ifdef CONFIG_MMU /* * Layout of the flags used for updating the hypervisor page tables * @@ -90,6 +91,30 @@ #define _PAGE_CONTIG_BIT 8 #define _PAGE_CONTIG (1U << _PAGE_CONTIG_BIT) +#else /* !CONFIG_MMU */ + +/* + * Layout of the flags used for updating MPU memory region attributes + * [0:2] Memory attribute Index + * [3:4] Execute Never + * [5:6] Access Permission + * [7] Region Present + */ +#define _PAGE_AI_BIT 0 +#define _PAGE_XN_BIT 3 +#define _PAGE_AP_BIT 5 +#define _PAGE_PRESENT_BIT 7 +#define _PAGE_AI (7U << _PAGE_AI_BIT) +#define _PAGE_XN (2U << _PAGE_XN_BIT) +#define _PAGE_RO (2U << _PAGE_AP_BIT) +#define _PAGE_PRESENT (1U << _PAGE_PRESENT_BIT) +#define PAGE_AI_MASK(x) (((x) >> _PAGE_AI_BIT) & 0x7U) +#define PAGE_XN_MASK(x) (((x) >> _PAGE_XN_BIT) & 0x3U) +#define PAGE_AP_MASK(x) (((x) >> _PAGE_AP_BIT) & 0x3U) +#define PAGE_RO_MASK(x) (((x) >> _PAGE_AP_BIT) & 0x2U) + +#endif /* CONFIG_MMU */ + /* * _PAGE_DEVICE and _PAGE_NORMAL are convenience defines. They are not * meant to be used outside of this header.