From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C1490C4332F for ; Tue, 15 Feb 2022 10:44:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236661AbiBOKok (ORCPT ); Tue, 15 Feb 2022 05:44:40 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:44116 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236657AbiBOKoh (ORCPT ); Tue, 15 Feb 2022 05:44:37 -0500 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C39F7AFF4D; Tue, 15 Feb 2022 02:44:27 -0800 (PST) Received: from pps.filterd (m0187473.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 21FAfoXd034682; Tue, 15 Feb 2022 10:44:27 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=qJxxlQJltRTVWdHNOxgBFrc7u81S6EYyQuIlDcO1rSo=; b=A9eP4W12z9rKaKcmXw6OxZzH5Y8Eh55bqeCeUISP+78Ym+h70zaYbi7mFXTwUyl5Isw+ NB8cEDQtKgBxQAquNX9AgwWWtl2vJAubz0tnkZhZEizF1fcUdQ4DYQd6aqB4q0R1ZeNJ plZaWBuPMnv0S8bhw9fwmKC9Kv75DCtjkM2GXzgsSw3NaH6rwD86i8KmwuM60p1FdTqi IVTrVCGEpKKJ3xBXAEvGBT4U5CvJwBgejLFFew6WqlrEEKa8JR006Oz/QZRRO6xkFqHX Wf+AZvbcOBOHSnAZgFV0GKgLAv7AYXNJFI0ItrHgyeJCKMI9V8bUoPL/r9mDE3P4ajsI 1w== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 3e8an601ka-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 15 Feb 2022 10:44:27 +0000 Received: from m0187473.ppops.net (m0187473.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.43/8.16.0.43) with SMTP id 21FAiQx8040937; Tue, 15 Feb 2022 10:44:26 GMT Received: from ppma06ams.nl.ibm.com (66.31.33a9.ip4.static.sl-reverse.com [169.51.49.102]) by mx0a-001b2d01.pphosted.com with ESMTP id 3e8an601jp-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 15 Feb 2022 10:44:26 +0000 Received: from pps.filterd (ppma06ams.nl.ibm.com [127.0.0.1]) by ppma06ams.nl.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 21FAgRdJ006237; Tue, 15 Feb 2022 10:44:24 GMT Received: from b06avi18626390.portsmouth.uk.ibm.com (b06avi18626390.portsmouth.uk.ibm.com [9.149.26.192]) by ppma06ams.nl.ibm.com with ESMTP id 3e645jp681-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 15 Feb 2022 10:44:24 +0000 Received: from d06av24.portsmouth.uk.ibm.com (d06av24.portsmouth.uk.ibm.com [9.149.105.60]) by b06avi18626390.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 21FAY0YV45351264 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 15 Feb 2022 10:34:00 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 411D54204B; Tue, 15 Feb 2022 10:44:21 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D095B42042; Tue, 15 Feb 2022 10:44:20 +0000 (GMT) Received: from li-c6ac47cc-293c-11b2-a85c-d421c8e4747b.ibm.com.com (unknown [9.171.31.140]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 15 Feb 2022 10:44:20 +0000 (GMT) From: Pierre Morel To: linux-s390@vger.kernel.org Cc: frankja@linux.ibm.com, thuth@redhat.com, kvm@vger.kernel.org, cohuck@redhat.com, imbrenda@linux.ibm.com, david@redhat.com, nrb@linux.ibm.com Subject: [kvm-unit-tests PATCH 1/1] s390x: stsi: Define vm_is_kvm to be used in different tests Date: Tue, 15 Feb 2022 11:46:32 +0100 Message-Id: <20220215104632.47796-2-pmorel@linux.ibm.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220215104632.47796-1-pmorel@linux.ibm.com> References: <20220215104632.47796-1-pmorel@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: u-kpmC9lMc4-7zVQywwsujx7qS7thONw X-Proofpoint-GUID: 1SiuCmjcunWDZh6mV7zuluuY6BFWi2Uy X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.816,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2022-02-15_03,2022-02-14_04,2021-12-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 mlxlogscore=817 priorityscore=1501 suspectscore=0 bulkscore=0 adultscore=0 clxscore=1015 spamscore=0 malwarescore=0 impostorscore=0 phishscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2201110000 definitions=main-2202150059 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Several tests are in need of a way to check on which hypervisor and virtualization level they are running on to be able to fence certain tests. This patch adds functions that return true if a vm is running under KVM, LPAR or generally as a level 2 guest. To check if we're running under KVM we use the STSI 3.2.2 instruction, let's define it's response structure in a central header. Signed-off-by: Pierre Morel --- lib/s390x/stsi.h | 32 ++++++++++++++++++++++++++++ lib/s390x/vm.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++-- lib/s390x/vm.h | 3 +++ s390x/stsi.c | 23 ++------------------ 4 files changed, 90 insertions(+), 23 deletions(-) create mode 100644 lib/s390x/stsi.h diff --git a/lib/s390x/stsi.h b/lib/s390x/stsi.h new file mode 100644 index 00000000..bebc492d --- /dev/null +++ b/lib/s390x/stsi.h @@ -0,0 +1,32 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Structures used to Store System Information + * + * Copyright IBM Corp. 2022 + */ + +#ifndef _S390X_STSI_H_ +#define _S390X_STSI_H_ + +struct sysinfo_3_2_2 { + uint8_t reserved[31]; + uint8_t count; + struct { + uint8_t reserved2[4]; + uint16_t total_cpus; + uint16_t conf_cpus; + uint16_t standby_cpus; + uint16_t reserved_cpus; + uint8_t name[8]; + uint32_t caf; + uint8_t cpi[16]; + uint8_t reserved5[3]; + uint8_t ext_name_encoding; + uint32_t reserved3; + uint8_t uuid[16]; + } vm[8]; + uint8_t reserved4[1504]; + uint8_t ext_names[8][256]; +}; + +#endif /* _S390X_STSI_H_ */ diff --git a/lib/s390x/vm.c b/lib/s390x/vm.c index a5b92863..91acd05b 100644 --- a/lib/s390x/vm.c +++ b/lib/s390x/vm.c @@ -12,6 +12,7 @@ #include #include #include "vm.h" +#include "stsi.h" /** * Detect whether we are running with TCG (instead of KVM) @@ -26,9 +27,13 @@ bool vm_is_tcg(void) if (initialized) return is_tcg; + if (!vm_is_vm()) { + initialized = true; + return is_tcg; + } + buf = alloc_page(); - if (!buf) - return false; + assert(buf); if (stsi(buf, 1, 1, 1)) goto out; @@ -43,3 +48,49 @@ out: free_page(buf); return is_tcg; } + +/** + * Detect whether we are running with KVM + */ +bool vm_is_kvm(void) +{ + /* EBCDIC for "KVM/" */ + const uint8_t kvm_ebcdic[] = { 0xd2, 0xe5, 0xd4, 0x61 }; + static bool initialized; + static bool is_kvm; + struct sysinfo_3_2_2 *stsi_322; + + if (initialized) + return is_kvm; + + if (!vm_is_vm() || vm_is_tcg()) { + initialized = true; + return is_kvm; + } + + stsi_322 = alloc_page(); + assert(stsi_322); + + if (stsi(stsi_322, 3, 2, 2)) + goto out; + + /* + * If the manufacturer string is "KVM/" in EBCDIC, then we + * are on KVM. + */ + is_kvm = !memcmp(&stsi_322->vm[0].cpi, kvm_ebcdic, sizeof(kvm_ebcdic)); + initialized = true; +out: + free_page(stsi_322); + return is_kvm; +} + +bool vm_is_lpar(void) +{ + return stsi_get_fc() == 2; +} + +bool vm_is_vm(void) +{ + return stsi_get_fc() == 3; +} diff --git a/lib/s390x/vm.h b/lib/s390x/vm.h index 7abba0cc..3aaf76af 100644 --- a/lib/s390x/vm.h +++ b/lib/s390x/vm.h @@ -9,5 +9,8 @@ #define _S390X_VM_H_ bool vm_is_tcg(void); +bool vm_is_kvm(void); +bool vm_is_vm(void); +bool vm_is_lpar(void); #endif /* _S390X_VM_H_ */ diff --git a/s390x/stsi.c b/s390x/stsi.c index 391f8849..dccc53e7 100644 --- a/s390x/stsi.c +++ b/s390x/stsi.c @@ -13,27 +13,8 @@ #include #include #include +#include -struct stsi_322 { - uint8_t reserved[31]; - uint8_t count; - struct { - uint8_t reserved2[4]; - uint16_t total_cpus; - uint16_t conf_cpus; - uint16_t standby_cpus; - uint16_t reserved_cpus; - uint8_t name[8]; - uint32_t caf; - uint8_t cpi[16]; - uint8_t reserved5[3]; - uint8_t ext_name_encoding; - uint32_t reserved3; - uint8_t uuid[16]; - } vm[8]; - uint8_t reserved4[1504]; - uint8_t ext_names[8][256]; -}; static uint8_t pagebuf[PAGE_SIZE * 2] __attribute__((aligned(PAGE_SIZE * 2))); static void test_specs(void) @@ -91,7 +72,7 @@ static void test_3_2_2(void) /* EBCDIC for "KVM/" */ const uint8_t cpi_kvm[] = { 0xd2, 0xe5, 0xd4, 0x61 }; const char vm_name_ext[] = "kvm-unit-test"; - struct stsi_322 *data = (void *)pagebuf; + struct sysinfo_3_2_2 *data = (void *)pagebuf; report_prefix_push("3.2.2"); -- 2.27.0