From nobody Tue Feb 10 01:31:29 2026 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=1652326448; cv=none; d=zohomail.com; s=zohoarc; b=cYyWO+/TIgimHdsZIRJJkolzE94ezf2gZN+9Q7FInUfe14rmth22KPDAT6R+OfFUg18l49pSmiiWd0SxXgqwqswuIzqmFJ+wTJNBe+qo6kJGIpr7W5/Lc1VbtJPjdxhMeTR4k4NrjZT5dquRtLDhZzwhuRyPKC9Fz9f9uxmC/8c= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1652326448; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=ZcTW0EBGCJHfi2JA5mt0Sn+wUZ/sjsqFR0kfclDEMEw=; b=mR7AT4w7mkY2PByWpu7iEpKMWdXvDJ38xA5sOTIbidCIRVlWdpqz3gQgkqSeoty82hioBoZaJ8tiKb8hk+aeJfWhez9ZbNWCdRD1OmNpN8MZUhQb31FNE0Af5eIyrL/apmhU3jW9JIMxaEthvGUWE8bP39Bq7TUD864DNtrQux4= 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 1652326448404571.9461353127913; Wed, 11 May 2022 20:34:08 -0700 (PDT) Received: from localhost ([::1]:55732 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nozaY-0003OV-Tf for importer@patchew.org; Wed, 11 May 2022 23:34:06 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:39130) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nozMi-0003jk-Me for qemu-devel@nongnu.org; Wed, 11 May 2022 23:19:48 -0400 Received: from mga07.intel.com ([134.134.136.100]:5605) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nozMg-0002tI-N5 for qemu-devel@nongnu.org; Wed, 11 May 2022 23:19:48 -0400 Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 May 2022 20:19:38 -0700 Received: from lxy-dell.sh.intel.com ([10.239.159.55]) by orsmga008.jf.intel.com with ESMTP; 11 May 2022 20:19:33 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1652325586; x=1683861586; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=YHDVSJiVS1pHlrW6Rj7YURDKB6fyFBAW4iz0owIqI+8=; b=KfLruPatVWIBa14AtDYH8e5GZU2Gslqm1vgrDPsUftR+WbJCLAFh6fiZ kTfC/E1vTpF91skFY73L1wDlq1hkMTHJtA940dVNaO3ALl05OIHXu0FJe VpWouPO3gUj2a7ij7uAFSSSuIrwujm7sF2KtR6fUzLuPGwloaEn23FtfQ CRktO624myMPgFd6LtVsy8cjnYCiuTZpiV/39q5rLytMxJvh7YOKtS4xP DH+DaT1s5E7/gSgglwl2uV1MvPJg0CV1QOwgCzqrm6zQNV8I26HLWxWF2 Cd9hjGCH3LdBjwIWWUZb9GMRcJVFSicsoTSfdI9i9R2zJayt/C8xREqPi w==; X-IronPort-AV: E=McAfee;i="6400,9594,10344"; a="332915009" X-IronPort-AV: E=Sophos;i="5.91,218,1647327600"; d="scan'208";a="332915009" X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.91,218,1647327600"; d="scan'208";a="594455936" From: Xiaoyao Li To: Paolo Bonzini , Isaku Yamahata , isaku.yamahata@intel.com, Gerd Hoffmann , =?UTF-8?q?Daniel=20P=20=2E=20Berrang=C3=A9?= , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Richard Henderson , "Michael S . Tsirkin" , Marcel Apfelbaum , Cornelia Huck , Marcelo Tosatti , Laszlo Ersek , Eric Blake Cc: Connor Kuehl , erdemaktas@google.com, kvm@vger.kernel.org, qemu-devel@nongnu.org, seanjc@google.com, xiaoyao.li@intel.com Subject: [RFC PATCH v4 18/36] i386/tdx: Skip BIOS shadowing setup Date: Thu, 12 May 2022 11:17:45 +0800 Message-Id: <20220512031803.3315890-19-xiaoyao.li@intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220512031803.3315890-1-xiaoyao.li@intel.com> References: <20220512031803.3315890-1-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=134.134.136.100; envelope-from=xiaoyao.li@intel.com; helo=mga07.intel.com X-Spam_score_int: -24 X-Spam_score: -2.5 X-Spam_bar: -- X-Spam_report: (-2.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, HK_RANDOM_ENVFROM=0.998, HK_RANDOM_FROM=0.998, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham 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" X-ZohoMail-DKIM: pass (identity @intel.com) X-ZM-MESSAGEID: 1652326448961100001 Content-Type: text/plain; charset="utf-8" TDX guest cannot go to real mode, so just skip the setup of isa-bios. Signed-off-by: Xiaoyao Li --- hw/i386/x86.c | 24 +++++++++++++----------- 1 file changed, 13 insertions(+), 11 deletions(-) diff --git a/hw/i386/x86.c b/hw/i386/x86.c index fdf6af2f6add..17f2252296c5 100644 --- a/hw/i386/x86.c +++ b/hw/i386/x86.c @@ -1138,17 +1138,19 @@ 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); + 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 2.27.0