From patchwork Tue Mar 9 01:40:23 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Huang, Kai" X-Patchwork-Id: 12123799 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,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 88A23C4361A for ; Tue, 9 Mar 2021 01:41:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 61A296527E for ; Tue, 9 Mar 2021 01:41:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231382AbhCIBlQ (ORCPT ); Mon, 8 Mar 2021 20:41:16 -0500 Received: from mga18.intel.com ([134.134.136.126]:36447 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231414AbhCIBku (ORCPT ); Mon, 8 Mar 2021 20:40:50 -0500 IronPort-SDR: 26jiULJnfu6UFTadjewMLr9uc/P+SLbRDtcwIPxAGsNM7ti13YSjwylR/4vWOoDatViPDNHHo9 Lh8Od04KTdyg== X-IronPort-AV: E=McAfee;i="6000,8403,9917"; a="175749516" X-IronPort-AV: E=Sophos;i="5.81,233,1610438400"; d="scan'208";a="175749516" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Mar 2021 17:40:49 -0800 IronPort-SDR: l45DYAjqVqae27MWrpBfCjnGduCbOh95QhDzz4ALqwVGoMs247L82eQYLflUi9U7i8euuLFUe0 B7xFsJSidB3A== X-IronPort-AV: E=Sophos;i="5.81,233,1610438400"; d="scan'208";a="447327642" Received: from kzliu-mobl.amr.corp.intel.com (HELO khuang2-desk.gar.corp.intel.com) ([10.252.128.38]) by orsmga001-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Mar 2021 17:40:44 -0800 From: Kai Huang To: kvm@vger.kernel.org, x86@kernel.org, linux-sgx@vger.kernel.org Cc: linux-kernel@vger.kernel.org, seanjc@google.com, jarkko@kernel.org, luto@kernel.org, dave.hansen@intel.com, rick.p.edgecombe@intel.com, haitao.huang@intel.com, pbonzini@redhat.com, bp@alien8.de, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, jmattson@google.com, joro@8bytes.org, vkuznets@redhat.com, wanpengli@tencent.com, Kai Huang Subject: [PATCH v2 16/25] KVM: x86: Define new #PF SGX error code bit Date: Tue, 9 Mar 2021 14:40:23 +1300 Message-Id: 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 Page faults that are signaled by the SGX Enclave Page Cache Map (EPCM), as opposed to the traditional IA32/EPT page tables, set an SGX bit in the error code to indicate that the #PF was induced by SGX. KVM will need to emulate this behavior as part of its trap-and-execute scheme for virtualizing SGX Launch Control, e.g. to inject SGX-induced #PFs if EINIT faults in the host, and to support live migration. Signed-off-by: Sean Christopherson Signed-off-by: Kai Huang --- arch/x86/include/asm/kvm_host.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 877a4025d8da..79b56eccb28f 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -227,6 +227,7 @@ enum x86_intercept_stage; #define PFERR_RSVD_BIT 3 #define PFERR_FETCH_BIT 4 #define PFERR_PK_BIT 5 +#define PFERR_SGX_BIT 15 #define PFERR_GUEST_FINAL_BIT 32 #define PFERR_GUEST_PAGE_BIT 33 @@ -236,6 +237,7 @@ enum x86_intercept_stage; #define PFERR_RSVD_MASK (1U << PFERR_RSVD_BIT) #define PFERR_FETCH_MASK (1U << PFERR_FETCH_BIT) #define PFERR_PK_MASK (1U << PFERR_PK_BIT) +#define PFERR_SGX_MASK (1U << PFERR_SGX_BIT) #define PFERR_GUEST_FINAL_MASK (1ULL << PFERR_GUEST_FINAL_BIT) #define PFERR_GUEST_PAGE_MASK (1ULL << PFERR_GUEST_PAGE_BIT)