From patchwork Fri Aug 18 09:50:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiaoyao Li X-Patchwork-Id: 13357641 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 2D600C05052 for ; Fri, 18 Aug 2023 10:00:28 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qWwFT-0003Pb-V9; Fri, 18 Aug 2023 05:58:32 -0400 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 1qWwFA-00024B-Qa for qemu-devel@nongnu.org; Fri, 18 Aug 2023 05:58:12 -0400 Received: from mgamail.intel.com ([192.55.52.120]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qWwF8-0000Gh-Ce for qemu-devel@nongnu.org; Fri, 18 Aug 2023 05:58:12 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1692352690; x=1723888690; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=H0Z0ghZT8QT/hfxT3+YMA2fZJUxBdaPnJ+LFqz71U00=; b=OSrMGdNbzQwtZmi5NnnQ6VZU6/g4fg0x1WreI711UsMpbnbsClZi/xpv 2npvxP8VcD8R8UjytftXoowPNkqq/av03rdgypB65WY5DO0q2y60Yhdnq QACY3H9RO5PwvjZZAU4+nOveXDY4kWSxyT1XQh2q6dbT+vfReAdIcT5PC Mp9fnUPfnO3Ze1qBmTxe6ZKej36sHF9KRR6TegT5jmcBNzSZh1cxVc6D1 WIYeegaJyiKjgeN4SylQlewlXcKeJMyl1nd/DG8Lcxt+OJcD8kUS/oOX3 3CYcRHzNVFGfakw/O1KkxYsB70pKIcuy+cGiwvRpCQciMen/oiHwLRdtq w==; X-IronPort-AV: E=McAfee;i="6600,9927,10805"; a="371966307" X-IronPort-AV: E=Sophos;i="6.01,182,1684825200"; d="scan'208";a="371966307" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Aug 2023 02:57:03 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10805"; a="849235275" X-IronPort-AV: E=Sophos;i="6.01,182,1684825200"; d="scan'208";a="849235275" Received: from lxy-clx-4s.sh.intel.com ([10.239.48.46]) by fmsmga002.fm.intel.com with ESMTP; 18 Aug 2023 02:56:58 -0700 From: Xiaoyao Li To: Paolo Bonzini , Richard Henderson , "Michael S. Tsirkin" , Marcel Apfelbaum , Igor Mammedov , Ani Sinha , Peter Xu , David Hildenbrand , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , =?utf-8?q?Dani?= =?utf-8?q?el_P=2E_Berrang=C3=A9?= , Cornelia Huck , Eric Blake , Markus Armbruster , Marcelo Tosatti , Gerd Hoffmann Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, Eduardo Habkost , Laszlo Ersek , xiaoyao.li@intel.com, Isaku Yamahata , erdemaktas@google.com, Chenyi Qiang Subject: [PATCH v2 30/58] i386/tdx: Don't initialize pc.rom for TDX VMs Date: Fri, 18 Aug 2023 05:50:13 -0400 Message-Id: <20230818095041.1973309-31-xiaoyao.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230818095041.1973309-1-xiaoyao.li@intel.com> References: <20230818095041.1973309-1-xiaoyao.li@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=192.55.52.120; envelope-from=xiaoyao.li@intel.com; helo=mgamail.intel.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.021, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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-bounces+qemu-devel=archiver.kernel.org@nongnu.org For TDX, the address below 1MB are entirely general RAM. No need to initialize pc.rom memory region for TDs. Signed-off-by: Xiaoyao Li --- This is more as a workaround of the issue that for q35 machine type, the real memslot update (which requires memslot deletion )for pc.rom happens after tdx_init_memory_region. It leads to the private memory ADD'ed before get lost. I haven't work out a good solution to resolve the order issue. So just skip the pc.rom setup to avoid memslot deletion. --- hw/i386/pc.c | 21 ++++++++++++--------- 1 file changed, 12 insertions(+), 9 deletions(-) diff --git a/hw/i386/pc.c b/hw/i386/pc.c index abeadd903827..bc307fed0f44 100644 --- a/hw/i386/pc.c +++ b/hw/i386/pc.c @@ -62,6 +62,7 @@ #include "sysemu/reset.h" #include "sysemu/runstate.h" #include "kvm/kvm_i386.h" +#include "kvm/tdx.h" #include "hw/xen/xen.h" #include "hw/xen/start_info.h" #include "ui/qemu-spice.h" @@ -1095,16 +1096,18 @@ void pc_memory_init(PCMachineState *pcms, /* Initialize PC system firmware */ pc_system_firmware_init(pcms, rom_memory); - option_rom_mr = g_malloc(sizeof(*option_rom_mr)); - memory_region_init_ram(option_rom_mr, NULL, "pc.rom", PC_ROM_SIZE, - &error_fatal); - if (pcmc->pci_enabled) { - memory_region_set_readonly(option_rom_mr, true); + if (!is_tdx_vm()) { + option_rom_mr = g_malloc(sizeof(*option_rom_mr)); + memory_region_init_ram(option_rom_mr, NULL, "pc.rom", PC_ROM_SIZE, + &error_fatal); + if (pcmc->pci_enabled) { + memory_region_set_readonly(option_rom_mr, true); + } + memory_region_add_subregion_overlap(rom_memory, + PC_ROM_MIN_VGA, + option_rom_mr, + 1); } - memory_region_add_subregion_overlap(rom_memory, - PC_ROM_MIN_VGA, - option_rom_mr, - 1); fw_cfg = fw_cfg_arch_create(machine, x86ms->boot_cpus, x86ms->apic_id_limit);