From patchwork Fri Apr 30 06:24:37 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yang Zhong X-Patchwork-Id: 12232697 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=-16.7 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 58AE5C433ED for ; Fri, 30 Apr 2021 06:44:34 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 0A067613CA for ; Fri, 30 Apr 2021 06:44:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0A067613CA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:48628 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lcMt7-0004hM-0p for qemu-devel@archiver.kernel.org; Fri, 30 Apr 2021 02:44:33 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:45944) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lcMeL-0004gg-5g for qemu-devel@nongnu.org; Fri, 30 Apr 2021 02:29:18 -0400 Received: from mga11.intel.com ([192.55.52.93]:63439) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lcMeB-00016y-JK for qemu-devel@nongnu.org; Fri, 30 Apr 2021 02:29:16 -0400 IronPort-SDR: AlcbbZOiIMwMnTorQ4WE1YQcFXK5eLjlm/eZDPSw+gIm0w10aebmdW4W8nmQb6LYJaXc/o5ZZc pTHmnWkE1sBA== X-IronPort-AV: E=McAfee;i="6200,9189,9969"; a="194023076" X-IronPort-AV: E=Sophos;i="5.82,260,1613462400"; d="scan'208";a="194023076" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Apr 2021 23:28:38 -0700 IronPort-SDR: SpR9BkzZcP3fIFITu3MfG0p1ghNud5CLStwYAxoNxWugeIINvFxceCbV0vky98UyzZOX+c4kUT Pny/Mmej4jCw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.82,260,1613462400"; d="scan'208";a="387258498" Received: from icx-2s.bj.intel.com ([10.240.192.119]) by orsmga003.jf.intel.com with ESMTP; 29 Apr 2021 23:28:37 -0700 From: Yang Zhong To: qemu-devel@nongnu.org Subject: [RESEND PATCH 14/32] i386: kvm: Add support for exposing PROVISIONKEY to guest Date: Fri, 30 Apr 2021 14:24:37 +0800 Message-Id: <20210430062455.8117-15-yang.zhong@intel.com> X-Mailer: git-send-email 2.29.2.334.gfaefdd61ec In-Reply-To: <20210430062455.8117-1-yang.zhong@intel.com> References: <20210430062455.8117-1-yang.zhong@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=192.55.52.93; envelope-from=yang.zhong@intel.com; helo=mga11.intel.com X-Spam_score_int: -68 X-Spam_score: -6.9 X-Spam_bar: ------ X-Spam_report: (-6.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: yang.zhong@intel.com, pbonzini@redhat.com, kai.huang@intel.com, seanjc@google.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Sean Christopherson If the guest want to fully use SGX, the guest needs to be able to access provisioning key. Add a new KVM_CAP_SGX_ATTRIBUTE to KVM to support provisioning key to KVM guests. Signed-off-by: Sean Christopherson Signed-off-by: Yang Zhong --- target/i386/cpu.c | 5 ++++- target/i386/kvm/kvm.c | 29 +++++++++++++++++++++++++++++ target/i386/kvm/kvm_i386.h | 2 ++ 3 files changed, 35 insertions(+), 1 deletion(-) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index e630e57f03..63253bf606 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -6015,7 +6015,10 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count, *ecx |= XSTATE_FP_MASK | XSTATE_SSE_MASK; /* Access to PROVISIONKEY requires additional credentials. */ - *eax &= ~(1U << 4); + if ((*eax & (1U << 4)) && + !kvm_enable_sgx_provisioning(cs->kvm_state)) { + *eax &= ~(1U << 4); + } } #endif break; diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index fa495a6f9e..c2fba39bd4 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -4555,6 +4555,35 @@ void kvm_arch_update_guest_debug(CPUState *cpu, struct kvm_guest_debug *dbg) } } +static bool has_sgx_provisioning; + +static bool __kvm_enable_sgx_provisioning(KVMState *s) +{ + int fd, ret; + + if (!kvm_vm_check_extension(s, KVM_CAP_SGX_ATTRIBUTE)) { + return false; + } + + fd = qemu_open_old("/dev/sgx_provision", O_RDONLY); + if (fd < 0) { + return false; + } + + ret = kvm_vm_enable_cap(s, KVM_CAP_SGX_ATTRIBUTE, 0, fd); + if (ret) { + error_report("Could not enable SGX PROVISIONKEY: %s", strerror(-ret)); + exit(1); + } + close(fd); + return true; +} + +bool kvm_enable_sgx_provisioning(KVMState *s) +{ + return MEMORIZE(__kvm_enable_sgx_provisioning(s), has_sgx_provisioning); +} + static bool host_supports_vmx(void) { uint32_t ecx, unused; diff --git a/target/i386/kvm/kvm_i386.h b/target/i386/kvm/kvm_i386.h index dc72508389..7bab91aecb 100644 --- a/target/i386/kvm/kvm_i386.h +++ b/target/i386/kvm/kvm_i386.h @@ -50,4 +50,6 @@ bool kvm_hv_vpindex_settable(void); uint64_t kvm_swizzle_msi_ext_dest_id(uint64_t address); +bool kvm_enable_sgx_provisioning(KVMState *s); + #endif