From nobody Tue Nov 26 18:32:58 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass header.i=@intel.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=intel.com ARC-Seal: i=1; a=rsa-sha256; t=1706153650; cv=none; d=zohomail.com; s=zohoarc; b=bl5Mzu5VEKUtAfnWTQ8CuYxYLIXZKZVkrW6SnjLdhFSyLQZ+GQhRcGgbza1m+n5yV7F4xRVgie56hzUT9Vu6og1QSCxe567HJMENUBSe4ov8IfSOqrBS30hRUfeq7RHGkyjQy6YKIm3Ji3Zs7EkrqTiEIMQn2q9aauTL0Z6TrKA= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1706153650; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=qNTKDFn0QIx0qc6dobaV5bFYo6TmhzHDE0fB4HdWWZs=; b=oBQISWwBnnuHL2r+06O/SzVXeXH91/D8xcOBbKJAgITTu+YCZkydTHJ1r6rGiy5d9bpMzqvoKep6nPcnE5RMcnNj+vCQ+LX1AwwBt4pPIV1sGPG/2VLDrT8w+1p7XSPDhgGGZaDii1XQksKQD41nXQ1Nf5Y5NeRo5zUqlYFpdiU= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=@intel.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1706153650097189.51097904424728; Wed, 24 Jan 2024 19:34:10 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rSqRf-0001rR-EK; Wed, 24 Jan 2024 22:30:27 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rSqRc-0001fk-VH for qemu-devel@nongnu.org; Wed, 24 Jan 2024 22:30:25 -0500 Received: from mgamail.intel.com ([192.198.163.10]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rSqRb-0001E0-7x for qemu-devel@nongnu.org; Wed, 24 Jan 2024 22:30:24 -0500 Received: from orviesa005.jf.intel.com ([10.64.159.145]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jan 2024 19:27:06 -0800 Received: from lxy-clx-4s.sh.intel.com ([10.239.48.52]) by orviesa005.jf.intel.com with ESMTP; 24 Jan 2024 19:27:01 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1706153423; x=1737689423; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=D7IKu0Ugz8vLyuxnCEQ1DNDK7JfT6+Ri9zy7tWOOvJc=; b=CssDCZSqzihLg2KZ6b58bcQxATa0Mq7bFubdjYHR/64PwQe1kqvj+msI tNAw8vHxJRZNq2O6zGSj4fdC4BNnHqgDQgLFXtURqVTCi+rUVc4B8ukvg GAGiODrcxxwA+v79lAl7KVS30eWxv0QyKGgktdhdeZ06P6Ipu6D4gzDCz ILS18ubE1iuU7jOX0sYyjHl01XUrJtmRqA1Fkf/66oZP1eoJ1OiS0VsP5 amQPZD2YRoqnm1eNi/PjSiB8kHIIg6dXfVYKeDr3LxHtzKK+lLjdpxCH9 3kNgEa9AOS2DBItHf56KM8k96qWiuBSavHE78pbxcMsHG9+IE9pXAvH3S w==; X-IronPort-AV: E=McAfee;i="6600,9927,10962"; a="9429432" X-IronPort-AV: E=Sophos;i="6.05,216,1701158400"; d="scan'208";a="9429432" X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.05,216,1701158400"; d="scan'208";a="2085888" From: Xiaoyao Li To: Paolo Bonzini , David Hildenbrand , Igor Mammedov , "Michael S . Tsirkin" , Marcel Apfelbaum , Richard Henderson , Peter Xu , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Cornelia Huck , =?UTF-8?q?Daniel=20P=20=2E=20Berrang=C3=A9?= , Eric Blake , Markus Armbruster , Marcelo Tosatti Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, xiaoyao.li@intel.com, Michael Roth , Sean Christopherson , Claudio Fontana , Gerd Hoffmann , Isaku Yamahata , Chenyi Qiang Subject: [PATCH v4 38/66] i386/tdx: Skip BIOS shadowing setup Date: Wed, 24 Jan 2024 22:23:00 -0500 Message-Id: <20240125032328.2522472-39-xiaoyao.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240125032328.2522472-1-xiaoyao.li@intel.com> References: <20240125032328.2522472-1-xiaoyao.li@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=192.198.163.10; envelope-from=xiaoyao.li@intel.com; helo=mgamail.intel.com X-Spam_score_int: -15 X-Spam_score: -1.6 X-Spam_bar: - X-Spam_report: (-1.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.5, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, HK_RANDOM_ENVFROM=0.999, HK_RANDOM_FROM=1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @intel.com) X-ZM-MESSAGEID: 1706153650865100011 Content-Type: text/plain; charset="utf-8" TDX doesn't support map different GPAs to same private memory. Thus, aliasing top 128KB of BIOS as isa-bios is not supported. On the other hand, TDX guest cannot go to real mode, it can work fine without isa-bios. Signed-off-by: Xiaoyao Li Acked-by: Gerd Hoffmann --- Changes in v1: - update commit message and comment to clarify --- hw/i386/x86.c | 25 ++++++++++++++----------- 1 file changed, 14 insertions(+), 11 deletions(-) diff --git a/hw/i386/x86.c b/hw/i386/x86.c index 343a929e1825..f7352b06c3e6 100644 --- a/hw/i386/x86.c +++ b/hw/i386/x86.c @@ -1179,17 +1179,20 @@ void x86_bios_rom_init(MachineState *ms, const char= *default_firmware, } g_free(filename); =20 - /* map the last 128KB of the BIOS in ISA space */ - isa_bios_size =3D MIN(bios_size, 128 * KiB); - isa_bios =3D g_malloc(sizeof(*isa_bios)); - memory_region_init_alias(isa_bios, NULL, "isa-bios", bios, - bios_size - isa_bios_size, isa_bios_size); - memory_region_add_subregion_overlap(rom_memory, - 0x100000 - isa_bios_size, - isa_bios, - 1); - if (!isapc_ram_fw) { - memory_region_set_readonly(isa_bios, true); + /* For TDX, alias different GPAs to same private memory is not support= ed */ + if (!is_tdx_vm()) { + /* map the last 128KB of the BIOS in ISA space */ + isa_bios_size =3D MIN(bios_size, 128 * KiB); + isa_bios =3D g_malloc(sizeof(*isa_bios)); + memory_region_init_alias(isa_bios, NULL, "isa-bios", bios, + bios_size - isa_bios_size, isa_bios_size); + memory_region_add_subregion_overlap(rom_memory, + 0x100000 - isa_bios_size, + isa_bios, + 1); + if (!isapc_ram_fw) { + memory_region_set_readonly(isa_bios, true); + } } =20 /* map all the bios at the top of memory */ --=20 2.34.1