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 4EDB1C19F2A for ; Sun, 7 Aug 2022 22:07:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237154AbiHGWHU (ORCPT ); Sun, 7 Aug 2022 18:07:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48942 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237072AbiHGWFM (ORCPT ); Sun, 7 Aug 2022 18:05:12 -0400 Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E9C29B7DA; Sun, 7 Aug 2022 15:03:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1659909781; x=1691445781; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=lKCVk5eYfArj0BKao6F/kBoR6PoZK+1iJmdh6WDEfmI=; b=hEMpLkhDCkZMW5BYXalAMfLy7FuKFNQxQxC75mM7p/tNDUmp7FgnYJOY FaMdwizye2t87oUgcIaTBQopBv+V6vR8qdG79zFlgnAzsRH6bvnhvU6xw OQDjP8p9WGpDyJpn6wnxShTXx5aEB+vFMkQnuURP88pxIroiF9nOcJO4D CIa8inXxCWe+iDoEVuYJaWo0NqixO/yygovHdMP1iIqL5I30c/ZJArr44 ZlBkUXuQ7IK88/9wsp28keKE8X7HVbsIRHl03wQQ1ngJVLIVSx8+oY9uu CfEpZDzo4cDrH86zGk4XxFLRN1O85X3h8jFu8HSYbLhV1FpGZjNj7tNjA A==; X-IronPort-AV: E=McAfee;i="6400,9594,10432"; a="289224127" X-IronPort-AV: E=Sophos;i="5.93,220,1654585200"; d="scan'208";a="289224127" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Aug 2022 15:02:35 -0700 X-IronPort-AV: E=Sophos;i="5.93,220,1654585200"; d="scan'208";a="663682570" Received: from ls.sc.intel.com (HELO localhost) ([143.183.96.54]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Aug 2022 15:02:35 -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 v8 040/103] KVM: x86/mmu: Require TDP MMU for TDX Date: Sun, 7 Aug 2022 15:01:25 -0700 Message-Id: <38ed5eb0302a4b7e47844e2546694da8093927d0.1659854790.git.isaku.yamahata@intel.com> 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: kvm@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 ce69535754ff..823c1ef807eb 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