From patchwork Thu May 12 03:18:02 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiaoyao Li X-Patchwork-Id: 12846971 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 784F7C433EF for ; Thu, 12 May 2022 03:45:29 +0000 (UTC) Received: from localhost ([::1]:51144 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nozlY-0003jW-Ia for qemu-devel@archiver.kernel.org; Wed, 11 May 2022 23:45:28 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:39776) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nozNv-0005dx-Fh for qemu-devel@nongnu.org; Wed, 11 May 2022 23:21:03 -0400 Received: from mga11.intel.com ([192.55.52.93]:31312) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nozNs-0003Rl-7J for qemu-devel@nongnu.org; Wed, 11 May 2022 23:21:01 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1652325660; x=1683861660; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=J8wfNdwz1HDEu6qHVMyEy9TFq8BIL0W8plK9acH8mCo=; b=BTs4z8P90wm1fxZ7GW0xGxYoCc28Co/F+KYmuKdGxYZ1dYXvWW9TShhv GbBnfY8ffZgXBa07mZ8Vxc+SXgK4f0IY/t8fm9YwgQDaHWVDa5bua1U+Y HCvW8F+MLaKkWoMVIHmzkGJmG6QoElRY+O+6jA8QvoWHvmMx+cL2d0MFk zpt3VKMqPmq72zgTRSP4t3mV3BQmlNZIxnQis8lXVKmwawrknAKfaa+SU 7ZEXVTt4CoXhejOiJZuiicETnTJzPjAhosNGyw/ZrB7zKwEBDjL+eaTmp zap6sImAMwjMgi6DhCnyk85BN9dHyGtxP//tYAH6Mf/alhdd7ivbqBp53 A==; X-IronPort-AV: E=McAfee;i="6400,9594,10344"; a="267461451" X-IronPort-AV: E=Sophos;i="5.91,218,1647327600"; d="scan'208";a="267461451" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 May 2022 20:20:58 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.91,218,1647327600"; d="scan'208";a="594456757" Received: from lxy-dell.sh.intel.com ([10.239.159.55]) by orsmga008.jf.intel.com with ESMTP; 11 May 2022 20:20:54 -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 35/36] i386/tdx: Don't get/put guest state for TDX VMs Date: Thu, 12 May 2022 11:18:02 +0800 Message-Id: <20220512031803.3315890-36-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=192.55.52.93; envelope-from=xiaoyao.li@intel.com; helo=mga11.intel.com X-Spam_score_int: -51 X-Spam_score: -5.2 X-Spam_bar: ----- X-Spam_report: (-5.2 / 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_HI=-5, 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" 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 4d520d0e34bd..3e26dacf7807 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -4478,6 +4478,11 @@ 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) { @@ -4572,6 +4577,12 @@ 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;