From nobody Sun Dec 14 11:18:35 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 1763538879328433.9552963228027; Tue, 18 Nov 2025 23:54:39 -0800 (PST) Received: from list by lists.xenproject.org with outflank-mailman.1165584.1492307 (Exim 4.92) (envelope-from ) id 1vLd19-0008Rj-Ci; Wed, 19 Nov 2025 07:54:19 +0000 Received: by outflank-mailman (output) from mailman id 1165584.1492307; Wed, 19 Nov 2025 07:54:19 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1vLd19-0008RX-9n; Wed, 19 Nov 2025 07:54:19 +0000 Received: by outflank-mailman (input) for mailman id 1165584; Wed, 19 Nov 2025 07:54:17 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1vLd17-0007zV-U6 for xen-devel@lists.xenproject.org; Wed, 19 Nov 2025 07:54:17 +0000 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by se1-gles-flk1.inumbo.com (Halon) with ESMTP id f2277e92-c51c-11f0-980a-7dc792cee155; Wed, 19 Nov 2025 08:54:16 +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 1D9251480; Tue, 18 Nov 2025 23:54:08 -0800 (PST) Received: from e134099.cambridge.arm.com (e134099.arm.com [10.1.198.34]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id A15BA3F740; Tue, 18 Nov 2025 23:54:14 -0800 (PST) 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: f2277e92-c51c-11f0-980a-7dc792cee155 From: Harry Ramsey To: xen-devel@lists.xenproject.org Cc: Luca.Fancellu@arm.com, Stefano Stabellini , Julien Grall , Bertrand Marquis , Michal Orzel , Volodymyr Babchuk Subject: [PATCH v3 3/3] arm/mpu: Implement ioremap_attr for MPU Date: Wed, 19 Nov 2025 07:53:51 +0000 Message-ID: <20251119075351.3926690-4-harry.ramsey@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251119075351.3926690-1-harry.ramsey@arm.com> References: <20251119075351.3926690-1-harry.ramsey@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZM-MESSAGEID: 1763538881631153000 Content-Type: text/plain; charset="utf-8" Implement the function `ioremap_attr` for MPU systems. Signed-off-by: Harry Ramsey Acked-by: Michal Orzel Reviewed-by: Luca Fancellu Tested-by: Luca Fancellu --- xen/arch/arm/mpu/mm.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/xen/arch/arm/mpu/mm.c b/xen/arch/arm/mpu/mm.c index 29dd8c4622..f25560d746 100644 --- a/xen/arch/arm/mpu/mm.c +++ b/xen/arch/arm/mpu/mm.c @@ -473,8 +473,13 @@ void free_init_memory(void) =20 void __iomem *ioremap_attr(paddr_t start, size_t len, unsigned int flags) { - BUG_ON("unimplemented"); - return NULL; + paddr_t start_pg =3D round_pgdown(start); + paddr_t end_pg =3D round_pgup(start_pg + len); + if ( xen_mpumap_update(start_pg, end_pg, flags) ) + return NULL; + + /* Mapped or already mapped */ + return maddr_to_virt(start_pg); } =20 /* --=20 2.43.0