From patchwork Thu May 12 03:17:45 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiaoyao Li X-Patchwork-Id: 12846959 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.gnu.org (lists.gnu.org [209.51.188.17]) (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 601E0C433F5 for ; Thu, 12 May 2022 03:33:52 +0000 (UTC) Received: from localhost ([::1]:55732 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nozaJ-0003OV-By for qemu-devel@archiver.kernel.org; Wed, 11 May 2022 23:33:51 -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 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" 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 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.91,218,1647327600"; d="scan'208";a="594455936" 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 From: Xiaoyao Li To: Paolo Bonzini , Isaku Yamahata , isaku.yamahata@intel.com, Gerd Hoffmann , =?utf-8?q?Daniel_P_=2E_Berrang=C3=A9?= , =?utf-8?q?Phi?= =?utf-8?q?lippe_Mathieu-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 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" 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); - /* map the last 128KB of the BIOS in ISA space */ - isa_bios_size = MIN(bios_size, 128 * KiB); - isa_bios = 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 = MIN(bios_size, 128 * KiB); + isa_bios = 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); + } } /* map all the bios at the top of memory */