From nobody Sun Feb 8 22:49:31 2026 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 9A493C38A02 for ; Sun, 30 Oct 2022 06:27:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230407AbiJ3G1L (ORCPT ); Sun, 30 Oct 2022 02:27:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47232 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229929AbiJ3GYL (ORCPT ); Sun, 30 Oct 2022 02:24:11 -0400 Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 46F0F13C; Sat, 29 Oct 2022 23:24:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1667111050; x=1698647050; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=XTbYY1fmIyEn8RqQg2g2IUB+pcesS3c7XzjHCDTS0FQ=; b=Iw+GFymTIGkx5EbISqnZrHFdmMhH9/fnUdut9U3Axbyqk4q5ud0sC9Sc XQXy00IpbrYaFEJ/EEZ4nvbdWezEKcZKmqqOcwxlbxwn3m9Hg8IuJzySI ynAS40vjzULeTaheKzwF9miog4GnbiLIu/A03UV4MT3Lcy9ijbnzkqjTF 5h7njKv3xJZan3Q/4QgRUw/o2j0/X11eFqFqMUpKCX4xtZHAJx0oYHmBq ELuxLFjQYATwEtw2TxHZnUEz3xw+SWjKOpBCbkkDJIAreog2442Wx5c+/ yc59erGK+4UrTdmSzxJl4fznTixhgT6O7ebZGNOyKcyvjWL2QyHicyaXN Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10515"; a="395037155" X-IronPort-AV: E=Sophos;i="5.95,225,1661842800"; d="scan'208";a="395037155" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Oct 2022 23:24:04 -0700 X-IronPort-AV: E=McAfee;i="6500,9779,10515"; a="878392985" X-IronPort-AV: E=Sophos;i="5.95,225,1661842800"; d="scan'208";a="878392985" Received: from ls.sc.intel.com (HELO localhost) ([143.183.96.54]) by fmsmga006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Oct 2022 23:24:04 -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 , David Matlack Subject: [PATCH v10 043/108] KVM: x86/mmu: Require TDP MMU for TDX Date: Sat, 29 Oct 2022 23:22:44 -0700 Message-Id: <82c25eec5a4c42e4b6a2038c7553bbaf56e87091.1667110240.git.isaku.yamahata@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" 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 c6be76f9849c..1bf58288ea79 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; =20 + /* + * 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 =3D=3D KVM_X86_TDX_VM ? -EOPNOTSUPP : 0; =20 wq =3D alloc_workqueue("kvm", WQ_UNBOUND|WQ_MEM_RECLAIM|WQ_CPU_INTENSIVE,= 0); if (!wq) --=20 2.25.1