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 lists1p.gnu.org (lists1p.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7CC05C5DF97 for ; Wed, 26 Aug 2026 12:54:17 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1wzD8J-0000Ck-3T; Wed, 26 Aug 2026 08:53:35 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wzD88-0008SU-Fd; Wed, 26 Aug 2026 08:53:24 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wzD7y-0002q1-Sy; Wed, 26 Aug 2026 08:53:19 -0400 Received: from pps.filterd (m0353729.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 67QCVviu2127741; Wed, 26 Aug 2026 12:52:53 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=pp1; bh=seEfB0 e4OAYzI8TfBacX8QHo36myH1X0GDuBvkV8Jeo=; b=MfJXkB0jZShgi608osszeK ri4QQevbLnaBmLJoaO58Kupq3gFEr+XP2ToFoC5BwoU4rchmr0iJ3JmJ7u7+Ucoc h60KDzp+numCmozscVCxKRdvkzsXABD1F8QwRfvLaKHpz8zXdTFSpI5sYORtZ4me ls2KGvTyrEkhcr/CXZTXTDD6SuIjDKVmVmkvNA4UJ/qq1bfBzRABiTYNM34oIQy1 54xpDNRNiRYd1ceEAE8cLS4CP2BM8eznqTCkbF0jkDCKXff7gVm+NyQ8XnJcH3uE jCJ/RN+6PdTwsWmXUO0qlTe0JsjSreAwZGaU+XD+CUb5rGMkDa72g4EQ0kGi72lA == Received: from ppma12.dal12v.mail.ibm.com (dc.9e.1632.ip4.static.sl-reverse.com [50.22.158.220]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 4g73eqxma3-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 26 Aug 2026 12:52:52 +0000 (GMT) Received: from pps.filterd (ppma12.dal12v.mail.ibm.com [127.0.0.1]) by ppma12.dal12v.mail.ibm.com (8.18.1.7/8.18.1.7) with ESMTP id 67QCfHXq002980; Wed, 26 Aug 2026 12:52:51 GMT Received: from smtprelay04.dal12v.mail.ibm.com ([172.16.1.6]) by ppma12.dal12v.mail.ibm.com (PPS) with ESMTPS id 4g7p3qa5np-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 26 Aug 2026 12:52:51 +0000 (GMT) Received: from smtpav02.wdc07v.mail.ibm.com (smtpav02.wdc07v.mail.ibm.com [10.39.53.229]) by smtprelay04.dal12v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 67QCqohP28115640 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 26 Aug 2026 12:52:50 GMT Received: from smtpav02.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1E95C5805B; Wed, 26 Aug 2026 12:52:50 +0000 (GMT) Received: from smtpav02.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E3CE358059; Wed, 26 Aug 2026 12:52:48 +0000 (GMT) Received: from li-479af74c-31f9-11b2-a85c-e4ddee11713b.ibm.com.com (unknown [9.61.78.161]) by smtpav02.wdc07v.mail.ibm.com (Postfix) with ESMTP; Wed, 26 Aug 2026 12:52:48 +0000 (GMT) From: Eric Farman To: qemu-devel@nongnu.org Cc: qemu-s390x@nongnu.org, Matthew Rosato , Cornelia Huck , Zhuoying Cai , Collin Walling , Eric Farman Subject: [PULL 27/37] s390x: Guest support for Secure-IPL Code Loading Attributes Facility (SCLAF) Date: Wed, 26 Aug 2026 08:52:02 -0400 Message-ID: <20260826125213.1901252-28-farman@linux.ibm.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260826125213.1901252-1-farman@linux.ibm.com> References: <20260826125213.1901252-1-farman@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 7Yrn8plYqk9h63meLCoX5Adg1BWMfSbP X-Proofpoint-ORIG-GUID: 7Yrn8plYqk9h63meLCoX5Adg1BWMfSbP X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODI2MDEwNCBTYWx0ZWRfX6cdq8DDwHFSb dT+Qs/ShnS2viEjb6/oQOGb4iXrnPWtRFaqghbf++ArTfDeFhcD7cYBVBoEpmA7ZP2XsGAwmAoF /d4NIl8o3qLZh6/7lIUNp3UiwoZESpCHiHAWTH8s/P38AW60m73DnXOpRR6CopIt8o+UGHtW5zr XtMRAlwyipa+4kn2io7mOXKUSebl6oOJETwmLg3GYhsGwJPnt5ZUs/bHT6NMOwuXnwW8xdVc1IT nozn2GNrdFxRTOGpfGpMXgXKvaYMApInPTjT53U07qLJTPEfCmDPZBFX9RU8RJ5V6/mckIfromJ QihZK4kG1kj7r1c5AvTMhamhx0KYIRrEHwy/O3e3eipcQWFUiONH2qQLhBVa6GunKg3gJ9BWUmK 5hJLjQOFIvkz5uQ7MMf/QYCcywVn3aGdhwND7ZWgANd1gDNXiz165NrZZ2Nt6R+lzCYzrmVKk6o incHcHiiBWTx+f2CNNw== X-Authority-Analysis: v=2.4 cv=QsRuG1yd c=1 sm=1 tr=0 ts=6a8ee1a4 cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=uAbxVGIbfxUO_5tXvNgY:22 a=VwQbUJbxAAAA:8 a=VnNF1IyMAAAA:8 a=aZI9m_ZHqXwCzBCL7hMA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 X-Proofpoint-Spam-Info: AW1haW4tMjYwODI2MDEwNCBTYWx0ZWRfXyLktnaf6Xe55 WQWdi9nsiWCmkAbqu7ra1+eLanMZxyAvP2llLHURXdxE86tGHe7Aq1zXD+3s1Z8YsidGbQ66rA5 LvpTQ18TsP1kLgtx9qVFXdDO7Gwlxgc= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-26_03,2026-08-26_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 adultscore=0 suspectscore=0 priorityscore=1501 impostorscore=0 spamscore=0 lowpriorityscore=0 clxscore=1015 bulkscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608260104 Received-SPF: pass client-ip=148.163.156.1; envelope-from=farman@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Zhuoying Cai The secure-IPL-code-loading-attributes facility (SCLAF) provides additional security during secure IPL. Availability of SCLAF is determined by byte 136 bit 3 of the SCLP Read SCP Info. This feature is available starting with the gen16 CPU model. Signed-off-by: Zhuoying Cai Reviewed-by: Collin Walling Reviewed-by: Matthew Rosato Link: https://lore.kernel.org/qemu-devel/20260730214624.2328883-26-zycai@linux.ibm.com Signed-off-by: Eric Farman --- docs/specs/s390x-secure-ipl.rst | 18 ++++++++++++++++++ target/s390x/cpu_features.c | 2 ++ target/s390x/cpu_features_def.h.inc | 1 + target/s390x/cpu_models.c | 3 +++ target/s390x/gen-features.c | 2 ++ target/s390x/kvm/kvm.c | 1 + 6 files changed, 27 insertions(+) diff --git a/docs/specs/s390x-secure-ipl.rst b/docs/specs/s390x-secure-ipl.rst index 113acbeda9..7a603eb956 100644 --- a/docs/specs/s390x-secure-ipl.rst +++ b/docs/specs/s390x-secure-ipl.rst @@ -122,3 +122,21 @@ The guest kernel uses the contents in the IIRB for: * Boot logging: reports which components were loaded and verified. * kexec operations: builds the next kernel’s IPL report from the existing one. * Keying: installs IPL certificates into the platform trusted keyring. + +Secure Code Loading Attributes Facility +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +The Secure Code Loading Attributes Facility (SCLAF) enhances system security +during the IPL by enforcing additional verification rules. + +When SCLAF is available, its behavior depends on the IPL mode. It introduces +verification of both signed and unsigned components to help ensure that only +authorized code is loaded during the IPL process. Any errors detected by SCLAF +are reported in the IIRB. + +Unsigned components are restricted to load addresses at or above absolute +storage address ``0x2000``. + +Signed components must include a Secure Code Loading Attribute Block (SCLAB), +which is appended at the very end of the component. The SCLAB defines security +attributes for handling the signed code. diff --git a/target/s390x/cpu_features.c b/target/s390x/cpu_features.c index 27f38636a9..c634e74123 100644 --- a/target/s390x/cpu_features.c +++ b/target/s390x/cpu_features.c @@ -120,6 +120,7 @@ void s390_fill_feat_block(const S390FeatBitmap features, S390FeatType type, * - All SIE facilities because SIE is not available * - DIAG318 * - Secure IPL Facility + * - Secure IPL Code Loading Attributes Facility * * As VMs can move in and out of protected mode the CPU model * doesn't protect us from that problem because it is only @@ -152,6 +153,7 @@ void s390_fill_feat_block(const S390FeatBitmap features, S390FeatType type, break; case S390_FEAT_TYPE_SCLP_FAC_IPL: clear_be_bit(s390_feat_def(S390_FEAT_SIPL)->bit, data); + clear_be_bit(s390_feat_def(S390_FEAT_SCLAF)->bit, data); break; case S390_FEAT_TYPE_SCLP_FAC139: clear_be_bit(s390_feat_def(S390_FEAT_SIE_ASTFLEIE2)->bit, data); diff --git a/target/s390x/cpu_features_def.h.inc b/target/s390x/cpu_features_def.h.inc index 0153a6aa67..a5aa19112a 100644 --- a/target/s390x/cpu_features_def.h.inc +++ b/target/s390x/cpu_features_def.h.inc @@ -142,6 +142,7 @@ DEF_FEAT(CERT_STORE, "cstore", SCLP_FAC134, 5, "Certificate Store functions") /* Features exposed via SCLP SCCB Facilities byte 136 - 137 (bit numbers relative to byte-136) */ DEF_FEAT(SIPL, "sipl", SCLP_FAC_IPL, 1, "Secure-IPL facility") +DEF_FEAT(SCLAF, "sclaf", SCLP_FAC_IPL, 3, "Secure-IPL-code-loading-attributes facility") /* Features exposed via SCLP SCCB Facilities byte 139 (bit numbers relative to byte-139) */ DEF_FEAT(SIE_ASTFLEIE2, "astfleie2", SCLP_FAC139, 1, "SIE: ASTFLE interpretation execution facility 2") diff --git a/target/s390x/cpu_models.c b/target/s390x/cpu_models.c index 97e77f2bfa..c41d629d68 100644 --- a/target/s390x/cpu_models.c +++ b/target/s390x/cpu_models.c @@ -264,6 +264,7 @@ bool s390_has_feat(S390Feat feat) case S390_FEAT_SIE_PFMFI: case S390_FEAT_SIE_IBS: case S390_FEAT_SIPL: + case S390_FEAT_SCLAF: case S390_FEAT_CONFIGURATION_TOPOLOGY: case S390_FEAT_SIE_ASTFLEIE2: return false; @@ -510,6 +511,8 @@ static void check_consistency(const S390CPUModel *model) { S390_FEAT_DIAG_318, S390_FEAT_EXTENDED_LENGTH_SCCB }, { S390_FEAT_CERT_STORE, S390_FEAT_EXTENDED_LENGTH_SCCB }, { S390_FEAT_SIPL, S390_FEAT_EXTENDED_LENGTH_SCCB }, + { S390_FEAT_SCLAF, S390_FEAT_EXTENDED_LENGTH_SCCB }, + { S390_FEAT_SCLAF, S390_FEAT_SIPL }, { S390_FEAT_NNPA, S390_FEAT_VECTOR }, { S390_FEAT_RDP, S390_FEAT_LOCAL_TLB_CLEARING }, { S390_FEAT_UV_FEAT_AP, S390_FEAT_AP }, diff --git a/target/s390x/gen-features.c b/target/s390x/gen-features.c index 6bf61447de..a99a75d14e 100644 --- a/target/s390x/gen-features.c +++ b/target/s390x/gen-features.c @@ -723,6 +723,7 @@ static uint16_t full_GEN16_GA1[] = { S390_FEAT_SIE_ASTFLEIE2, S390_FEAT_CERT_STORE, S390_FEAT_SIPL, + S390_FEAT_SCLAF, }; static uint16_t full_GEN17_GA1[] = { @@ -925,6 +926,7 @@ static uint16_t qemu_MAX[] = { S390_FEAT_EXTENDED_LENGTH_SCCB, S390_FEAT_CERT_STORE, S390_FEAT_SIPL, + S390_FEAT_SCLAF, }; /****** END FEATURE DEFS ******/ diff --git a/target/s390x/kvm/kvm.c b/target/s390x/kvm/kvm.c index 70c9933d7f..b34a912714 100644 --- a/target/s390x/kvm/kvm.c +++ b/target/s390x/kvm/kvm.c @@ -2504,6 +2504,7 @@ bool kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp) /* Some Secure IPL facilities are emulated by QEMU */ set_bit(S390_FEAT_SIPL, model->features); + set_bit(S390_FEAT_SCLAF, model->features); /* Test for Ultravisor features that influence secure guest behavior */ query_uv_feat_guest(model->features); -- 2.55.0