From nobody Thu Oct 23 00:06:10 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 168775086534469.9131577206856; Sun, 25 Jun 2023 20:41:05 -0700 (PDT) Received: from list by lists.xenproject.org with outflank-mailman.555076.866795 (Exim 4.92) (envelope-from ) id 1qDd5X-0008Ai-JI; Mon, 26 Jun 2023 03:40:27 +0000 Received: by outflank-mailman (output) from mailman id 555076.866795; Mon, 26 Jun 2023 03:40:27 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1qDd5W-00083m-7k; Mon, 26 Jun 2023 03:40:26 +0000 Received: by outflank-mailman (input) for mailman id 555076; Mon, 26 Jun 2023 03:40:22 +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 1qDd0p-0007ej-9f for xen-devel@lists.xenproject.org; Mon, 26 Jun 2023 03:35:35 +0000 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by se1-gles-sth1.inumbo.com (Halon) with ESMTP id 8244304c-13d2-11ee-b237-6b7b168915f2; Mon, 26 Jun 2023 05:35:34 +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 33DF32F4; Sun, 25 Jun 2023 20:36:18 -0700 (PDT) Received: from a011292.shanghai.arm.com (a011292.shanghai.arm.com [10.169.190.94]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id BE9583F64C; Sun, 25 Jun 2023 20:35:31 -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: 8244304c-13d2-11ee-b237-6b7b168915f2 From: Penny Zheng To: xen-devel@lists.xenproject.org Cc: Wei Chen , Stefano Stabellini , Julien Grall , Bertrand Marquis , Volodymyr Babchuk , Penny Zheng Subject: [PATCH v3 09/52] xen/arm: use PA == VA for EARLY_UART_VIRTUAL_ADDRESS on MPU systems Date: Mon, 26 Jun 2023 11:34:00 +0800 Message-Id: <20230626033443.2943270-10-Penny.Zheng@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230626033443.2943270-1-Penny.Zheng@arm.com> References: <20230626033443.2943270-1-Penny.Zheng@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZM-MESSAGEID: 1687750866125100001 Content-Type: text/plain; charset="utf-8" From: Wei Chen There is no VMSA support on MPU systems, so we can not map early UART to FIXMAP_CONSOLE. In stead, we can use PA =3D=3D VA for early UART on MPU systems. Signed-off-by: Wei Chen Signed-off-by: Penny Zheng --- v2: 1. New patch --- v3: 1. fix comment 2. change CONFIG_ARM_V8R to !CONFIG_HAS_MMU --- xen/arch/arm/include/asm/early_printk.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/xen/arch/arm/include/asm/early_printk.h b/xen/arch/arm/include= /asm/early_printk.h index c5149b2976..ec5bcc343c 100644 --- a/xen/arch/arm/include/asm/early_printk.h +++ b/xen/arch/arm/include/asm/early_printk.h @@ -15,10 +15,22 @@ =20 #ifdef CONFIG_EARLY_PRINTK =20 +#ifndef CONFIG_HAS_MMU + +/* + * For MPU systems, there is no VMSA support in EL2, so we use VA =3D=3D PA + * for EARLY_UART_VIRTUAL_ADDRESS. + */ +#define EARLY_UART_VIRTUAL_ADDRESS CONFIG_EARLY_UART_BASE_ADDRESS + +#else + /* need to add the uart address offset in page to the fixmap address */ #define EARLY_UART_VIRTUAL_ADDRESS \ (FIXMAP_ADDR(FIXMAP_CONSOLE) + (CONFIG_EARLY_UART_BASE_ADDRESS & ~PAGE= _MASK)) =20 +#endif /* CONFIG_HAS_MMU */ + #endif /* !CONFIG_EARLY_PRINTK */ =20 #endif --=20 2.25.1