From nobody Fri Oct 31 04:33:57 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=fail(p=none dis=none) header.from=arm.com Return-Path: Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) by mx.zohomail.com with SMTPS id 1751465686217196.2545721578481; Wed, 2 Jul 2025 07:14:46 -0700 (PDT) Received: from list by lists.xenproject.org with outflank-mailman.1031210.1405001 (Exim 4.92) (envelope-from ) id 1uWyEL-0000iy-Mg; Wed, 02 Jul 2025 14:14:33 +0000 Received: by outflank-mailman (output) from mailman id 1031210.1405001; Wed, 02 Jul 2025 14:14:33 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1uWyEL-0000il-Ha; Wed, 02 Jul 2025 14:14:33 +0000 Received: by outflank-mailman (input) for mailman id 1031210; Wed, 02 Jul 2025 14:14:32 +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 1uWyEK-0007Ob-IF for xen-devel@lists.xenproject.org; Wed, 02 Jul 2025 14:14:32 +0000 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by se1-gles-sth1.inumbo.com (Halon) with ESMTP id df6aa2d3-574e-11f0-a313-13f23c93f187; Wed, 02 Jul 2025 16:14:31 +0200 (CEST) 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 68EA122C7; Wed, 2 Jul 2025 07:14:16 -0700 (PDT) Received: from PWQ0QT7DJ1.arm.com (unknown [10.57.65.245]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id DC3EF3F6A8; Wed, 2 Jul 2025 07:14:29 -0700 (PDT) X-Outflank-Mailman: Message body and most headers restored to incoming version 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: df6aa2d3-574e-11f0-a313-13f23c93f187 From: Hari Limaye To: xen-devel@lists.xenproject.org Cc: luca.fancellu@arm.com, Stefano Stabellini , Julien Grall , Bertrand Marquis , Michal Orzel , Volodymyr Babchuk , Ayan Kumar Halder Subject: [PATCH v2 6/6] arm/mpu: Implement remove_early_mappings for MPU systems Date: Wed, 2 Jul 2025 15:14:01 +0100 Message-ID: <540b3b9ea598a63b31ffe4165bd791d4b8151863.1751464757.git.hari.limaye@arm.com> X-Mailer: git-send-email 2.42.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZM-MESSAGEID: 1751465687302116600 Content-Type: text/plain; charset="utf-8" From: Luca Fancellu Implement remove_early_mappings for MPU systems. Signed-off-by: Luca Fancellu Signed-off-by: Hari Limaye Reviewed-by: Ayan Kumar Halder --- Changes from v1: - Add Ayan's R-b --- xen/arch/arm/mpu/setup.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/xen/arch/arm/mpu/setup.c b/xen/arch/arm/mpu/setup.c index ab00cb944b..5928b534d5 100644 --- a/xen/arch/arm/mpu/setup.c +++ b/xen/arch/arm/mpu/setup.c @@ -97,7 +97,14 @@ void __init copy_from_paddr(void *dst, paddr_t paddr, un= signed long len) =20 void __init remove_early_mappings(void) { - BUG_ON("unimplemented"); + int rc; + + if ( mapped_fdt_paddr =3D=3D INVALID_PADDR ) + return; + + rc =3D destroy_xen_mappings(round_pgdown(mapped_fdt_paddr), mapped_fdt= _limit); + if ( rc ) + panic("Unable to unmap the device-tree.\n"); } =20 /* --=20 2.34.1