From patchwork Thu Mar 17 13:59:12 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiaoyao Li X-Patchwork-Id: 12784186 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 9CE21C433EF for ; Thu, 17 Mar 2022 14:46:50 +0000 (UTC) Received: from localhost ([::1]:43016 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nUrOr-0008Ip-M6 for qemu-devel@archiver.kernel.org; Thu, 17 Mar 2022 10:46:49 -0400 Received: from eggs.gnu.org ([209.51.188.92]:58050) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nUqiN-0002Wp-Dz for qemu-devel@nongnu.org; Thu, 17 Mar 2022 10:02:55 -0400 Received: from mga12.intel.com ([192.55.52.136]:25193) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nUqiG-0004Y7-Q1 for qemu-devel@nongnu.org; Thu, 17 Mar 2022 10:02:53 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1647525768; x=1679061768; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=BYAe2LusAaSRURXWhV4ju9j/C1xHQreVBbaqFDZzgAw=; b=nWP7lUWcNFPF/zcMXqMd12YxW1efkBF3v0dTCQ39ReqNDCFYRacelAxd taF/3es4QTcz9MLoYKi/6XSkJe2NXLymg9tzB65U03CLbSodqiafAzN2+ glUvCJbkdJKixE/45nJPCizniR5q7maD0ziKNHbI7XmyulhWFoYT3zyh9 E2eDuYgPM/0vJNPwD/zzdm6F/B8JFYMdlGA/525C2ODHLkTBEP6QIcvZm G1xOJU5kRsx0L+6qNc+a3+9lRqGoYndaUkp8eMrktSpOWYHbePq0mIw2q rktVaKRheHaeqsge2pATkYcCukyesKWL7aaxRK2uBt74lM9pLILRyU2d5 Q==; X-IronPort-AV: E=McAfee;i="6200,9189,10288"; a="236817728" X-IronPort-AV: E=Sophos;i="5.90,188,1643702400"; d="scan'208";a="236817728" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Mar 2022 07:01:56 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,188,1643702400"; d="scan'208";a="541379084" Received: from lxy-dell.sh.intel.com ([10.239.159.55]) by orsmga007.jf.intel.com with ESMTP; 17 Mar 2022 07:01:51 -0700 From: Xiaoyao Li To: Paolo Bonzini , =?utf-8?q?Philippe_Mathieu-Daud?= =?utf-8?q?=C3=A9?= , Richard Henderson , "Michael S. Tsirkin" , Marcel Apfelbaum , Cornelia Huck , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , Marcelo Tosatti , Laszlo Ersek , Gerd Hoffmann , Eric Blake Subject: [RFC PATCH v3 35/36] i386/tdx: Don't get/put guest state for TDX VMs Date: Thu, 17 Mar 2022 21:59:12 +0800 Message-Id: <20220317135913.2166202-36-xiaoyao.li@intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220317135913.2166202-1-xiaoyao.li@intel.com> References: <20220317135913.2166202-1-xiaoyao.li@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=192.55.52.136; envelope-from=xiaoyao.li@intel.com; helo=mga12.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_PASS=-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: , Cc: isaku.yamahata@intel.com, kvm@vger.kernel.org, Connor Kuehl , seanjc@google.com, xiaoyao.li@intel.com, qemu-devel@nongnu.org, erdemaktas@google.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" 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 --- 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 9c7eb3dea0a8..dafb63d4d2d7 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -4395,6 +4395,11 @@ 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; + } + /* must be before kvm_put_nested_state so that EFER.SVME is set */ ret = has_sregs2 ? kvm_put_sregs2(x86_cpu) : kvm_put_sregs(x86_cpu); if (ret < 0) { @@ -4489,6 +4494,12 @@ 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;