From patchwork Wed Apr 7 20:49:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Huang, Kai" X-Patchwork-Id: 12189365 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=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 203DBC43461 for ; Wed, 7 Apr 2021 20:50:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E162461242 for ; Wed, 7 Apr 2021 20:50:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231246AbhDGUuW (ORCPT ); Wed, 7 Apr 2021 16:50:22 -0400 Received: from mga05.intel.com ([192.55.52.43]:47225 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231235AbhDGUuV (ORCPT ); Wed, 7 Apr 2021 16:50:21 -0400 IronPort-SDR: o9iS3LYnW4jzfaHn69oyET6Fkju5LohUkp5IUixVgf3uBXh8rmjqpEigypBVdEmHmnpzAqi58p AQ+jX9wB+EJg== X-IronPort-AV: E=McAfee;i="6000,8403,9947"; a="278660310" X-IronPort-AV: E=Sophos;i="5.82,204,1613462400"; d="scan'208";a="278660310" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Apr 2021 13:50:02 -0700 IronPort-SDR: Q57BLhvq1CltoDkXc9M4iUV/ETOZG3e1i+SzPAJrlstjlLEi0l1n8aZzAFmxYipQpjt66vn1hJ nyoaYkLLbY2g== X-IronPort-AV: E=Sophos;i="5.82,204,1613462400"; d="scan'208";a="415437329" Received: from tkokeray-mobl.amr.corp.intel.com (HELO khuang2-desk.gar.corp.intel.com) ([10.254.113.100]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Apr 2021 13:49:59 -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 v4 01/11] KVM: x86: Export kvm_mmu_gva_to_gpa_{read,write}() for SGX (VMX) Date: Thu, 8 Apr 2021 08:49:25 +1200 Message-Id: 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 47e021bdcc94..d2da5abcf395 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -5959,6 +5959,7 @@ 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) @@ -5975,6 +5976,7 @@ 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,