From nobody Mon Feb 9 11:32:50 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=intel.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 163108972555626.858364450805084; Wed, 8 Sep 2021 01:28:45 -0700 (PDT) Received: from localhost ([::1]:60944 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mNswm-0002V8-Hx for importer@patchew.org; Wed, 08 Sep 2021 04:28:44 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:47086) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mNstc-0002sb-Gw for qemu-devel@nongnu.org; Wed, 08 Sep 2021 04:25:28 -0400 Received: from mga14.intel.com ([192.55.52.115]:13021) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mNstZ-0003sa-Iw for qemu-devel@nongnu.org; Wed, 08 Sep 2021 04:25:28 -0400 Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Sep 2021 01:25:21 -0700 Received: from icx-2s.bj.intel.com ([10.240.192.119]) by FMSMGA003.fm.intel.com with ESMTP; 08 Sep 2021 01:25:20 -0700 X-IronPort-AV: E=McAfee;i="6200,9189,10100"; a="220102704" X-IronPort-AV: E=Sophos;i="5.85,277,1624345200"; d="scan'208";a="220102704" X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.85,277,1624345200"; d="scan'208";a="538450920" From: Yang Zhong To: qemu-devel@nongnu.org Subject: [PATCH 5/7] qmp: Add the qmp_query_sgx_capabilities() Date: Wed, 8 Sep 2021 16:19:35 +0800 Message-Id: <20210908081937.77254-6-yang.zhong@intel.com> X-Mailer: git-send-email 2.29.2.334.gfaefdd61ec In-Reply-To: <20210908081937.77254-1-yang.zhong@intel.com> References: <20210908081937.77254-1-yang.zhong@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=192.55.52.115; envelope-from=yang.zhong@intel.com; helo=mga14.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, eblake@redhat.com, seanjc@google.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZM-MESSAGEID: 1631089726110100002 Content-Type: text/plain; charset="utf-8" Libvirt can use qmp_query_sgx_capabilities() to get the host sgx capabilities. Signed-off-by: Yang Zhong --- hw/i386/sgx.c | 66 ++++++++++++++++++++++++++++++++++++++ include/hw/i386/sgx.h | 1 + qapi/misc-target.json | 18 +++++++++++ target/i386/monitor.c | 5 +++ tests/qtest/qmp-cmd-test.c | 1 + 5 files changed, 91 insertions(+) diff --git a/hw/i386/sgx.c b/hw/i386/sgx.c index a3cd671a70..854532fb98 100644 --- a/hw/i386/sgx.c +++ b/hw/i386/sgx.c @@ -18,6 +18,72 @@ #include "qapi/error.h" #include "exec/address-spaces.h" #include "hw/i386/sgx.h" +#include "sysemu/hw_accel.h" + +#define SGX_MAX_EPC_SECTIONS 8 +#define SGX_CPUID_EPC_INVALID 0x0 + +/* A valid EPC section. */ +#define SGX_CPUID_EPC_SECTION 0x1 +#define SGX_CPUID_EPC_MASK GENMASK(3, 0) + +static uint64_t sgx_calc_section_metric(uint64_t low, uint64_t high) +{ + return (low & GENMASK_ULL(31, 12)) + + ((high & GENMASK_ULL(19, 0)) << 32); +} + +static uint64_t sgx_calc_host_epc_section_size(void) +{ + uint32_t i, type; + uint32_t eax, ebx, ecx, edx; + uint64_t size =3D 0; + + for (i =3D 0; i < SGX_MAX_EPC_SECTIONS; i++) { + host_cpuid(0x12, i + 2, &eax, &ebx, &ecx, &edx); + + type =3D eax & SGX_CPUID_EPC_MASK; + if (type =3D=3D SGX_CPUID_EPC_INVALID) { + break; + } + + if (type !=3D SGX_CPUID_EPC_SECTION) { + break; + } + + size +=3D sgx_calc_section_metric(ecx, edx); + } + + return size; +} + +SGXInfo *sgx_get_capabilities(Error **errp) +{ + SGXInfo *info =3D NULL; + uint32_t eax, ebx, ecx, edx; + + int fd =3D qemu_open_old("/dev/sgx_vepc", O_RDWR); + if (fd < 0) { + error_setg(errp, "SGX is not enabled in KVM"); + return NULL; + } + + info =3D g_new0(SGXInfo, 1); + host_cpuid(0x7, 0, &eax, &ebx, &ecx, &edx); + + info->sgx =3D ebx & (1U << 2) ? true : false; + info->flc =3D ecx & (1U << 30) ? true : false; + + host_cpuid(0x12, 0, &eax, &ebx, &ecx, &edx); + info->sgx1 =3D eax & (1U << 0) ? true : false; + info->sgx2 =3D eax & (1U << 1) ? true : false; + + info->section_size =3D sgx_calc_host_epc_section_size(); + + close(fd); + + return info; +} =20 SGXInfo *sgx_get_info(void) { diff --git a/include/hw/i386/sgx.h b/include/hw/i386/sgx.h index ea8672f8eb..28437cffc6 100644 --- a/include/hw/i386/sgx.h +++ b/include/hw/i386/sgx.h @@ -7,5 +7,6 @@ #include "qapi/qapi-types-misc-target.h" =20 SGXInfo *sgx_get_info(void); +SGXInfo *sgx_get_capabilities(Error **errp); =20 #endif diff --git a/qapi/misc-target.json b/qapi/misc-target.json index e2a347cc23..594fbd1577 100644 --- a/qapi/misc-target.json +++ b/qapi/misc-target.json @@ -376,3 +376,21 @@ # ## { 'command': 'query-sgx', 'returns': 'SGXInfo', 'if': 'TARGET_I386' } + +## +# @query-sgx-capabilities: +# +# Returns information from host SGX capabilities +# +# Returns: @SGXInfo +# +# Since: 6.2 +# +# Example: +# +# -> { "execute": "query-sgx-capabilities" } +# <- { "return": { "sgx": true, "sgx1" : true, "sgx2" : true, +# "flc": true, "section-size" : 0 } } +# +## +{ 'command': 'query-sgx-capabilities', 'returns': 'SGXInfo', 'if': 'TARGET= _I386' } diff --git a/target/i386/monitor.c b/target/i386/monitor.c index 0f1b48b4f8..23a6dc3b7d 100644 --- a/target/i386/monitor.c +++ b/target/i386/monitor.c @@ -799,3 +799,8 @@ void hmp_info_sgx(Monitor *mon, const QDict *qdict) =20 qapi_free_SGXInfo(info); } + +SGXInfo *qmp_query_sgx_capabilities(Error **errp) +{ + return sgx_get_capabilities(errp); +} diff --git a/tests/qtest/qmp-cmd-test.c b/tests/qtest/qmp-cmd-test.c index b75f3364f3..1af2f74c28 100644 --- a/tests/qtest/qmp-cmd-test.c +++ b/tests/qtest/qmp-cmd-test.c @@ -101,6 +101,7 @@ static bool query_is_ignored(const char *cmd) "query-sev", "query-sev-capabilities", "query-sgx", + "query-sgx-capabilities", NULL }; int i;