From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 84086C433F5 for ; Fri, 30 Sep 2022 10:23:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232310AbiI3KXM (ORCPT ); Fri, 30 Sep 2022 06:23:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33720 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231573AbiI3KTH (ORCPT ); Fri, 30 Sep 2022 06:19:07 -0400 Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9109F1822E9; Fri, 30 Sep 2022 03:19:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1664533145; x=1696069145; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=ETYhmV4ggDyJkx64nnGBESEDJmnFJiUzMUdZ17hT8mE=; b=F2SUyS7foBvFRIQp4hjuPZsnEAZ7q98WCVkHjQc4DlybZcE47jTTlRZd GkH5PuYqvkF1PuLCLrt2ls9kI+dReGLAWIoMZwMaaM6vH0V6WbwHyNVe0 WZTZu9l1L6pXIbE+rd7DzmRYf/APlntoPxlAJRoKMTUH4R6JBZcOu23d+ t+rBjoE6EkRH2Q/7c0dYJkbAgjx7AdnmZNLY05ub+0ZzL2pjUTRENXVvc PUYbBtDAjCKT/9qrP1Y0IgLkrQLosWQQmclDa4zjcwUuVNjdX3FHUxRdf X12zGRK8E4XIjVoe/oOc0LolLSh5nr0N1sf0p/mhXMbnWvMVaM6amlaDG w==; X-IronPort-AV: E=McAfee;i="6500,9779,10485"; a="281870099" X-IronPort-AV: E=Sophos;i="5.93,358,1654585200"; d="scan'208";a="281870099" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Sep 2022 03:18:58 -0700 X-IronPort-AV: E=McAfee;i="6500,9779,10485"; a="726807637" X-IronPort-AV: E=Sophos;i="5.93,358,1654585200"; d="scan'208";a="726807637" Received: from ls.sc.intel.com (HELO localhost) ([143.183.96.54]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Sep 2022 03:18:58 -0700 From: isaku.yamahata@intel.com To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: isaku.yamahata@intel.com, isaku.yamahata@gmail.com, Paolo Bonzini , erdemaktas@google.com, Sean Christopherson , Sagi Shahar Subject: [PATCH v9 042/105] KVM: x86/mmu: Require TDP MMU for TDX Date: Fri, 30 Sep 2022 03:17:36 -0700 Message-Id: X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Isaku Yamahata Require the TDP MMU for guest TDs, the so called "shadow" MMU does not support mapping guest private memory, i.e. does not support Secure-EPT. Signed-off-by: Isaku Yamahata --- arch/x86/kvm/mmu/tdp_mmu.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c index ef8b0c929944..8f20c3857397 100644 --- a/arch/x86/kvm/mmu/tdp_mmu.c +++ b/arch/x86/kvm/mmu/tdp_mmu.c @@ -18,8 +18,12 @@ int kvm_mmu_init_tdp_mmu(struct kvm *kvm) { struct workqueue_struct *wq; + /* + * Because only the TDP MMU supports TDX, require the TDP MMU for guest + * TDs. + */ if (!tdp_enabled || !READ_ONCE(tdp_mmu_enabled)) - return 0; + return kvm->arch.vm_type == KVM_X86_TDX_VM ? -EOPNOTSUPP : 0; wq = alloc_workqueue("kvm", WQ_UNBOUND|WQ_MEM_RECLAIM|WQ_CPU_INTENSIVE, 0); if (!wq) -- 2.25.1