From patchwork Tue Apr 1 08:58:52 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luca Fancellu X-Patchwork-Id: 14034505 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 AB20BC3601A for ; Tue, 1 Apr 2025 08:59:24 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.933676.1335552 (Exim 4.92) (envelope-from ) id 1tzXSi-0002S1-0V; Tue, 01 Apr 2025 08:59:12 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 933676.1335552; Tue, 01 Apr 2025 08:59:11 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tzXSh-0002Qy-R4; Tue, 01 Apr 2025 08:59:11 +0000 Received: by outflank-mailman (input) for mailman id 933676; Tue, 01 Apr 2025 08:59:10 +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 1tzXSg-0002OX-Kr for xen-devel@lists.xenproject.org; Tue, 01 Apr 2025 08:59:10 +0000 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by se1-gles-sth1.inumbo.com (Halon) with ESMTP id 92d9b3a6-0ed7-11f0-9ea7-5ba50f476ded; Tue, 01 Apr 2025 10:59:09 +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 696D7150C; Tue, 1 Apr 2025 01:59:12 -0700 (PDT) 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 E17953F694; Tue, 1 Apr 2025 01:59:07 -0700 (PDT) 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: 92d9b3a6-0ed7-11f0-9ea7-5ba50f476ded From: Luca Fancellu To: xen-devel@lists.xenproject.org Cc: Stefano Stabellini , Julien Grall , Bertrand Marquis , Michal Orzel , Volodymyr Babchuk Subject: [PATCH v4 1/7] arm/mpu: Add HYPERVISOR_VIRT_START and avoid a check in xen.lds.S Date: Tue, 1 Apr 2025 09:58:52 +0100 Message-Id: <20250401085858.2228991-2-luca.fancellu@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250401085858.2228991-1-luca.fancellu@arm.com> References: <20250401085858.2228991-1-luca.fancellu@arm.com> MIME-Version: 1.0 The define HYPERVISOR_VIRT_START is required by the common code, even if MPU system doesn't use virtual memory, define it in mpu/layout.h in order to reuse existing code. Disable a check in the linker script for arm for !MMU systems. Signed-off-by: Luca Fancellu Reviewed-by: Michal Orzel --- v4 changes: - no changes v3 changes: - no changes v2 changes: - Add Michal R-by --- xen/arch/arm/include/asm/mpu/layout.h | 2 ++ xen/arch/arm/xen.lds.S | 2 ++ 2 files changed, 4 insertions(+) diff --git a/xen/arch/arm/include/asm/mpu/layout.h b/xen/arch/arm/include/asm/mpu/layout.h index d6d397f4c2ac..248e55f8882d 100644 --- a/xen/arch/arm/include/asm/mpu/layout.h +++ b/xen/arch/arm/include/asm/mpu/layout.h @@ -22,6 +22,8 @@ */ #define XEN_VIRT_START _AT(paddr_t, XEN_START_ADDRESS) +#define HYPERVISOR_VIRT_START XEN_VIRT_START + #endif /* __ARM_MPU_LAYOUT_H__ */ /* * Local variables: diff --git a/xen/arch/arm/xen.lds.S b/xen/arch/arm/xen.lds.S index bbccff1a0350..4342e54422a7 100644 --- a/xen/arch/arm/xen.lds.S +++ b/xen/arch/arm/xen.lds.S @@ -239,4 +239,6 @@ ASSERT(IS_ALIGNED(__bss_start, POINTER_ALIGN), "__bss_start is misaligned") ASSERT(IS_ALIGNED(__bss_end, POINTER_ALIGN), "__bss_end is misaligned") /* To simplify the logic in head.S, we want to _end to be page aligned */ ASSERT(IS_ALIGNED(_end, PAGE_SIZE), "_end is not page aligned") +#ifdef CONFIG_MMU ASSERT((_end - _start) <= XEN_VIRT_SIZE, "Xen is too big") +#endif