From nobody Fri May 3 12:16:55 2024 Delivered-To: importer@patchew.org Received-SPF: none (zoho.com: 192.237.175.120 is neither permitted nor denied by domain of lists.xenproject.org) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; dkim=fail; spf=none (zoho.com: 192.237.175.120 is neither permitted nor denied by domain of lists.xenproject.org) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=fail(p=none dis=none) header.from=kernel.org ARC-Seal: i=1; a=rsa-sha256; t=1556214815; cv=none; d=zoho.com; s=zohoarc; b=omdRNSx4piU7vneIcOwN2gWhHAHNKQbJnBswg2nga3Rag/6pQ4q8Q8fKUUzoNf0een+czd7zOhxgmr6LBPCVt2fgJT8El+NRGiRShZdreDEibqlN78N6nGeXckiYPAhuofonVskbEyON/MG10i/hCOi5U9ZlWfp2P0yKY3JBMhM= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1556214815; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:List-Subscribe:List-Post:List-Id:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Sender:Subject:To:ARC-Authentication-Results; bh=ERrEHRvYjsQE4QSrzMS9sEWHSlsDpibK5zl8ZVDx41g=; b=UVIPDX1OhllhOFOntycCPERcs+GhfTkJj35qRMv4FE94PokSq+l9g8tXOYUtUcmvci9+WPXuf4jT/8BqOa0Yy9geAsTJdfvBoSqGJVFcBaVfYObGhUhC7dskeFuMeUEH0qA9QjrMxmYEZnChxWkzkraddAVKDrZSQBoWcVEksZw= ARC-Authentication-Results: i=1; mx.zoho.com; dkim=fail; spf=none (zoho.com: 192.237.175.120 is neither permitted nor denied by domain of lists.xenproject.org) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) by mx.zohomail.com with SMTPS id 1556214815691739.9379099733397; Thu, 25 Apr 2019 10:53:35 -0700 (PDT) Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1hJiXR-0005EF-2U; Thu, 25 Apr 2019 17:52:01 +0000 Received: from us1-rack-dfw2.inumbo.com ([104.130.134.6]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1hJiXP-0005EA-Ni for xen-devel@lists.xenproject.org; Thu, 25 Apr 2019 17:51:59 +0000 Received: from mail.kernel.org (unknown [198.145.29.99]) by us1-rack-dfw2.inumbo.com (Halon) with ESMTPS id d1ff7d9d-6782-11e9-843c-bc764e045a96; Thu, 25 Apr 2019 17:51:58 +0000 (UTC) Received: from sstabellini-ThinkPad-X260.xilinx.com (c-67-164-102-47.hsd1.ca.comcast.net [67.164.102.47]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 10E1C205F4; Thu, 25 Apr 2019 17:51:58 +0000 (UTC) X-Inumbo-ID: d1ff7d9d-6782-11e9-843c-bc764e045a96 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1556214718; bh=uUIkrfGfwD9p46Awz0gpzEkDuq7/nDp6be3QGZ8Wi98=; h=From:To:Cc:Subject:Date:From; b=0plhF/26+p9sDSA8SQN91gcq6x70/AbH+6gdmo/cdNWq8dHOmEv1dbpquqOdzKssL tXvnH4Djh2I2j860NmgL5slAb3PRF8W4ZurYVVkHnyQkZRDyWVmgo+fhE0sWGGxrtB 0GjmHslrvcn2hwYiVP9cT/dwVTA8CWaMTskG+ANQ= From: Stefano Stabellini To: xen-devel@lists.xenproject.org Date: Thu, 25 Apr 2019 10:51:55 -0700 Message-Id: <1556214715-22030-1-git-send-email-sstabellini@kernel.org> X-Mailer: git-send-email 1.9.1 Subject: [Xen-devel] [PATCH] xen/arm: skip first page when RAM starts at 0x0 X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Stefano Stabellini , julien.grall@arm.com, sstabellini@kernel.org, 206497@studenti.unimore.it MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Xen assumes that RAM starts at addresses greater than 0x0 in a few places. The PDX code is one of them but there are more. For now, skip the first page in memory when the start addess is 0x0. Signed-off-by: Stefano Stabellini --- xen/arch/arm/bootfdt.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/xen/arch/arm/bootfdt.c b/xen/arch/arm/bootfdt.c index 891b4b6..2ae4238 100644 --- a/xen/arch/arm/bootfdt.c +++ b/xen/arch/arm/bootfdt.c @@ -157,6 +157,13 @@ static void __init process_memory_node(const void *fdt= , int node, device_tree_get_reg(&cell, address_cells, size_cells, &start, &siz= e); if ( !size ) continue; + + /* + * Xen cannot deal with memory starting at 0x0. Burn the first + * page. + */ + if ( start =3D=3D 0 ) + start +=3D PAGE_SIZE; bootinfo.mem.bank[bootinfo.mem.nr_banks].start =3D start; bootinfo.mem.bank[bootinfo.mem.nr_banks].size =3D size; bootinfo.mem.nr_banks++; --=20 1.9.1 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel