From patchwork Wed Nov 15 07:15:18 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiaoyao Li X-Patchwork-Id: 13456342 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 6FC47C47074 for ; Wed, 15 Nov 2023 07:24:37 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1r3AG4-00025C-SD; Wed, 15 Nov 2023 02:24:20 -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 1r3AG3-000227-6V for qemu-devel@nongnu.org; Wed, 15 Nov 2023 02:24:19 -0500 Received: from mgamail.intel.com ([192.55.52.115]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1r3AG1-0007Df-Bu for qemu-devel@nongnu.org; Wed, 15 Nov 2023 02:24:18 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1700033057; x=1731569057; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=PrWM5IKcBBzoUS1oE5zI3h+a4eXQwk7DCZxM+N2LTY0=; b=ZoxAmAxWhai/JbNvNMDhMBOYu6pzCGGLCdnBt5sjaP6TzutLvZzkueQm z+rE0cqx/4M9elVd+GbM+IJis4x9lcqqElv8Pf3XiKloRcjDtFsIJDnB1 0AmjSeAYsAwKgGg4RBpe2cGOpDg3isHLDQT1BTU5TMM0/lwTw258x9NF2 zemxvO5w1tj+gGKjZthLHnWoKW1V8pdTOA3ihEa+auWCm4Ph/fcZF7WIa 2sqZHReWP6y7HaMBNaNkkW2FklKKBxp6FYtgJWQtF3H9PSPwE0CQLGMtl SyJx2Tg8gZusztqS1YA95hJLBySEDGmJEY7FegU2eBRqisi+lGLVhGqJm A==; X-IronPort-AV: E=McAfee;i="6600,9927,10894"; a="390623740" X-IronPort-AV: E=Sophos;i="6.03,304,1694761200"; d="scan'208";a="390623740" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Nov 2023 23:24:16 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10894"; a="714800574" X-IronPort-AV: E=Sophos;i="6.03,304,1694761200"; d="scan'208";a="714800574" Received: from lxy-clx-4s.sh.intel.com ([10.239.48.52]) by orsmga003.jf.intel.com with ESMTP; 14 Nov 2023 23:24:09 -0800 From: Xiaoyao Li To: Paolo Bonzini , David Hildenbrand , Igor Mammedov , "Michael S . Tsirkin" , Marcel Apfelbaum , Richard Henderson , Peter Xu , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Cornelia Huck , =?utf-8?q?Daniel_P_=2E_Berrang=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 v3 69/70] i386/tdx: Don't get/put guest state for TDX VMs Date: Wed, 15 Nov 2023 02:15:18 -0500 Message-Id: <20231115071519.2864957-70-xiaoyao.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231115071519.2864957-1-xiaoyao.li@intel.com> References: <20231115071519.2864957-1-xiaoyao.li@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=192.55.52.115; envelope-from=xiaoyao.li@intel.com; helo=mgamail.intel.com X-Spam_score_int: -23 X-Spam_score: -2.4 X-Spam_bar: -- X-Spam_report: (-2.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, 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=0.999, 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-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Sean Christopherson Don't get/put state of TDX VMs since accessing/mutating guest state of production TDs is not supported. Note, it will be allowed for a debug TD. Corresponding support will be introduced when debug TD support is implemented in the future. Signed-off-by: Sean Christopherson Signed-off-by: Xiaoyao Li Acked-by: Gerd Hoffmann --- target/i386/kvm/kvm.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index 5c5400c51cd1..56171dc76235 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -4621,6 +4621,11 @@ int kvm_arch_put_registers(CPUState *cpu, int level) assert(cpu_is_stopped(cpu) || qemu_cpu_is_self(cpu)); + /* TODO: Allow accessing guest state for debug TDs. */ + if (is_tdx_vm()) { + return 0; + } + /* * Put MSR_IA32_FEATURE_CONTROL first, this ensures the VM gets out of VMX * root operation upon vCPU reset. kvm_put_msr_feature_control() should also @@ -4721,6 +4726,12 @@ int kvm_arch_get_registers(CPUState *cs) if (ret < 0) { goto out; } + + /* TODO: Allow accessing guest state for debug TDs. */ + if (is_tdx_vm()) { + return 0; + } + ret = kvm_getput_regs(cpu, 0); if (ret < 0) { goto out;