From patchwork Mon Apr 19 10:01:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yang Zhong X-Patchwork-Id: 1467884 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) 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 ozlabs.org (Postfix) with ESMTPS id 4FP37S4MnKz9vGd for ; Mon, 19 Apr 2021 20:33:24 +1000 (AEST) Received: from localhost ([::1]:44306 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lYRDW-0006lC-If for incoming@patchwork.ozlabs.org; Mon, 19 Apr 2021 06:33:22 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:33036) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lYR3l-0004YP-Pc for qemu-devel@nongnu.org; Mon, 19 Apr 2021 06:23:18 -0400 Received: from mga17.intel.com ([192.55.52.151]:24099) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lYR3j-00025K-EW for qemu-devel@nongnu.org; Mon, 19 Apr 2021 06:23:17 -0400 IronPort-SDR: qCF7uF+6vZnSejGbiPOPaYt1fKtr5cIsfo5FshpdVqCqtx3ErnxX/JR9rAG9WbM8/RzpMTXbps 6KfYIPGNA2yw== X-IronPort-AV: E=McAfee;i="6200,9189,9958"; a="175409291" X-IronPort-AV: E=Sophos;i="5.82,233,1613462400"; d="scan'208";a="175409291" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Apr 2021 03:22:53 -0700 IronPort-SDR: WBBICG/pWirGeGaxdSZnmGQRlTQEkyFw4PcIIZQLpFV5kAcx3Mqt8t5fLt8AXjPK6YxMzEGIkN f1jp+DtvgRyQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.82,233,1613462400"; d="scan'208";a="419947403" Received: from icx-2s.bj.intel.com ([10.240.192.119]) by fmsmga008.fm.intel.com with ESMTP; 19 Apr 2021 03:22:51 -0700 From: Yang Zhong To: qemu-devel@nongnu.org Subject: [PATCH 14/32] i386: kvm: Add support for exposing PROVISIONKEY to guest Date: Mon, 19 Apr 2021 18:01:38 +0800 Message-Id: <20210419100156.53504-15-yang.zhong@intel.com> X-Mailer: git-send-email 2.29.2.334.gfaefdd61ec In-Reply-To: <20210419100156.53504-1-yang.zhong@intel.com> References: <20210419100156.53504-1-yang.zhong@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=192.55.52.151; envelope-from=yang.zhong@intel.com; helo=mga17.intel.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, 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+incoming=patchwork.ozlabs.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..648cccd7c2 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 = open("/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