From patchwork Wed Jan 6 01:55:19 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Huang, Kai" X-Patchwork-Id: 12000743 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7EA5CC43331 for ; Wed, 6 Jan 2021 01:57:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 592042246B for ; Wed, 6 Jan 2021 01:57:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726551AbhAFB4V (ORCPT ); Tue, 5 Jan 2021 20:56:21 -0500 Received: from mga05.intel.com ([192.55.52.43]:3707 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725860AbhAFB4V (ORCPT ); Tue, 5 Jan 2021 20:56:21 -0500 IronPort-SDR: MVF3X0nCTuz3g06VTbnRUogWQ542nk1j9iI1r/Nu/Yo1uvjKjNZwskq9nu7bfPTZEHFIWm/pnP 6DweXxpXnOHw== X-IronPort-AV: E=McAfee;i="6000,8403,9855"; a="261976906" X-IronPort-AV: E=Sophos;i="5.78,478,1599548400"; d="scan'208";a="261976906" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Jan 2021 17:55:40 -0800 IronPort-SDR: 5kD6emunE0uu7aXdH4MBzTx5IqLKcV9ENEYSqZRyLVerDBteegXFkSOiD+VNrmvtVCwgtNQJzI Ji8TUv0omgwQ== X-IronPort-AV: E=Sophos;i="5.78,478,1599548400"; d="scan'208";a="421993154" Received: from zhuoxuan-mobl.amr.corp.intel.com (HELO khuang2-desk.gar.corp.intel.com) ([10.251.29.237]) by orsmga001-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Jan 2021 17:55:37 -0800 From: Kai Huang To: linux-sgx@vger.kernel.org, kvm@vger.kernel.org, x86@kernel.org Cc: seanjc@google.com, jarkko@kernel.org, luto@kernel.org, dave.hansen@intel.com, haitao.huang@intel.com, pbonzini@redhat.com, bp@alien8.de, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, Kai Huang Subject: [RFC PATCH 02/23] x86/sgx: Add enum for SGX_CHILD_PRESENT error code Date: Wed, 6 Jan 2021 14:55:19 +1300 Message-Id: <2a41e15dfda722dd1e34feeda34ce864cd82361b.1609890536.git.kai.huang@intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-sgx@vger.kernel.org From: Sean Christopherson SGX virtualization requires to allocate "raw" EPC and use it as "virtual EPC" for SGX guest. Unlike EPC used by SGX driver, virtual EPC doesn't track how EPC pages are used in VM, e.g. (de)construction of enclaves, so it cannot guarantee EREMOVE success, e.g. it doesn't have a priori knowledge of which pages are SECS with non-zero child counts. Add SGX_CHILD_PRESENT for use by SGX virtualization to assert EREMOVE failures are expected, but only due to SGX_CHILD_PRESENT. Signed-off-by: Sean Christopherson Signed-off-by: Kai Huang Acked-by: Jarkko Sakkinen --- arch/x86/kernel/cpu/sgx/arch.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/kernel/cpu/sgx/arch.h b/arch/x86/kernel/cpu/sgx/arch.h index dd7602c44c72..56b0f8ae3f92 100644 --- a/arch/x86/kernel/cpu/sgx/arch.h +++ b/arch/x86/kernel/cpu/sgx/arch.h @@ -26,12 +26,14 @@ * enum sgx_return_code - The return code type for ENCLS, ENCLU and ENCLV * %SGX_NOT_TRACKED: Previous ETRACK's shootdown sequence has not * been completed yet. + * %SGX_CHILD_PRESENT Enclave has child pages present in the EPC. * %SGX_INVALID_EINITTOKEN: EINITTOKEN is invalid and enclave signer's * public key does not match IA32_SGXLEPUBKEYHASH. * %SGX_UNMASKED_EVENT: An unmasked event, e.g. INTR, was received */ enum sgx_return_code { SGX_NOT_TRACKED = 11, + SGX_CHILD_PRESENT = 13, SGX_INVALID_EINITTOKEN = 16, SGX_UNMASKED_EVENT = 128, };