From patchwork Mon Apr 12 04:21:33 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Huang, Kai" X-Patchwork-Id: 12196753 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=ham 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 1E924C433ED for ; Mon, 12 Apr 2021 04:21:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D78A56120A for ; Mon, 12 Apr 2021 04:21:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229448AbhDLEWM (ORCPT ); Mon, 12 Apr 2021 00:22:12 -0400 Received: from mga07.intel.com ([134.134.136.100]:53368 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229865AbhDLEWM (ORCPT ); Mon, 12 Apr 2021 00:22:12 -0400 IronPort-SDR: OivJrluwVec8F0ZSL8xH0bhXcNQnliwHZGgRTXuiwdddxh5aUqyeyISw2yPt8owCFjO/tZfFbu cns8a1bpmZAQ== X-IronPort-AV: E=McAfee;i="6000,8403,9951"; a="258083739" X-IronPort-AV: E=Sophos;i="5.82,214,1613462400"; d="scan'208";a="258083739" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Apr 2021 21:21:54 -0700 IronPort-SDR: /1PtQ6lEtz+xxvmcOCDOQDRSMQuDhdXF6/1T50uOup//IaOOCEK9xP2KV5G3/Gf+7tb4nPOTmy Ts5N/gtzoE9g== X-IronPort-AV: E=Sophos;i="5.82,214,1613462400"; d="scan'208";a="521030346" Received: from rutujajo-mobl.amr.corp.intel.com (HELO khuang2-desk.gar.corp.intel.com) ([10.212.194.203]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Apr 2021 21:21:51 -0700 From: Kai Huang To: kvm@vger.kernel.org, linux-sgx@vger.kernel.org Cc: seanjc@google.com, pbonzini@redhat.com, bp@alien8.de, jarkko@kernel.org, dave.hansen@intel.com, luto@kernel.org, rick.p.edgecombe@intel.com, haitao.huang@intel.com, Kai Huang Subject: [PATCH v5 01/11] KVM: x86: Export kvm_mmu_gva_to_gpa_{read,write}() for SGX (VMX) Date: Mon, 12 Apr 2021 16:21:33 +1200 Message-Id: <02f37708321bcdfaa2f9d41c8478affa6e84b04d.1618196135.git.kai.huang@intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-sgx@vger.kernel.org From: Sean Christopherson Export the gva_to_gpa() helpers for use by SGX virtualization when executing ENCLS[ECREATE] and ENCLS[EINIT] on behalf of the guest. To execute ECREATE and EINIT, KVM must obtain the GPA of the target Secure Enclave Control Structure (SECS) in order to get its corresponding HVA. Because the SECS must reside in the Enclave Page Cache (EPC), copying the SECS's data to a host-controlled buffer via existing exported helpers is not a viable option as the EPC is not readable or writable by the kernel. SGX virtualization will also use gva_to_gpa() to obtain HVAs for non-EPC pages in order to pass user pointers directly to ECREATE and EINIT, which avoids having to copy pages worth of data into the kernel. Signed-off-by: Sean Christopherson Acked-by: Jarkko Sakkinen Signed-off-by: Kai Huang --- arch/x86/kvm/x86.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 16fb39503296..b9600540508e 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -6007,6 +6007,7 @@ gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, u32 access = (static_call(kvm_x86_get_cpl)(vcpu) == 3) ? PFERR_USER_MASK : 0; return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); } +EXPORT_SYMBOL_GPL(kvm_mmu_gva_to_gpa_read); gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, struct x86_exception *exception) @@ -6023,6 +6024,7 @@ gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, access |= PFERR_WRITE_MASK; return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); } +EXPORT_SYMBOL_GPL(kvm_mmu_gva_to_gpa_write); /* uses this to access any guest's mapped memory without checking CPL */ gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva,