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 6AB65C55167 for ; Thu, 30 Jul 2026 21:47:09 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1wpYai-0001fE-RR; Thu, 30 Jul 2026 17:47:00 -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 1wpYah-0001dJ-Ft; Thu, 30 Jul 2026 17:46:59 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wpYaf-0002Mw-LI; Thu, 30 Jul 2026 17:46:59 -0400 Received: from pps.filterd (m0360072.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 66UJmAoS4002062; Thu, 30 Jul 2026 21:46:54 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:date:from:in-reply-to:message-id :mime-version:references:subject:to; s=pp1; bh=tEgUhRwUtT4UcdBnJ +gxcnJNToSAEiXaxtY/OGGx4eQ=; b=bnOM0koIjEdhd5IXwAV5WR4DoAYo0G7t2 cYpa1Qqcp6mIvhEuutlCGa7/lUd7H6J6rLqd5pIkkQXboux2VjdYTziJXS0NMtMC KlB3/9sxnWe/gsDLjQ6jbfKCe4+v4rdFUnRxx05VgcExYc6SO06VZz2NIUKFhc83 +E7e8xLJ2F1eeOQU/m+oDjVt7KbH/lTWh3H58O+QJXkTCNFC/0Kl2fDsclVCm7VY Hh+nnnPRCGUHz5iwWRCEAZqBNtuJJas1AIk5Vv3j3annHyHvVa3IOONwuP/gSCsV h7T7QGL8P2b1Ycc7tLbwe+bvCYhzY1QwwBU9i/yJfdD7YQni50UZA== Received: from ppma11.dal12v.mail.ibm.com (db.9e.1632.ip4.static.sl-reverse.com [50.22.158.219]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 4fmuwd94w6-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 30 Jul 2026 21:46:53 +0000 (GMT) Received: from pps.filterd (ppma11.dal12v.mail.ibm.com [127.0.0.1]) by ppma11.dal12v.mail.ibm.com (8.18.1.7/8.18.1.7) with ESMTP id 66ULfI9h003318; Thu, 30 Jul 2026 21:46:53 GMT Received: from smtprelay04.wdc07v.mail.ibm.com ([172.16.1.71]) by ppma11.dal12v.mail.ibm.com (PPS) with ESMTPS id 4fna5yd1ee-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 30 Jul 2026 21:46:53 +0000 (GMT) Received: from smtpav05.wdc07v.mail.ibm.com (smtpav05.wdc07v.mail.ibm.com [10.39.53.232]) by smtprelay04.wdc07v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 66ULkplB49414638 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 30 Jul 2026 21:46:51 GMT Received: from smtpav05.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5FB2358043; Thu, 30 Jul 2026 21:46:51 +0000 (GMT) Received: from smtpav05.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6DE585805D; Thu, 30 Jul 2026 21:46:49 +0000 (GMT) Received: from fedora-workstation.ibmuc.com (unknown [9.61.77.192]) by smtpav05.wdc07v.mail.ibm.com (Postfix) with ESMTP; Thu, 30 Jul 2026 21:46:49 +0000 (GMT) From: Zhuoying Cai To: qemu-s390x@nongnu.org, qemu-devel@nongnu.org Cc: jrossi@linux.ibm.com, cohuck@redhat.com, berrange@redhat.com, richard.henderson@linaro.org, david@kernel.org, walling@linux.ibm.com, jjherne@linux.ibm.com, pasic@linux.ibm.com, borntraeger@linux.ibm.com, farman@linux.ibm.com, mjrosato@linux.ibm.com, iii@linux.ibm.com, eblake@redhat.com, armbru@redhat.com, zycai@linux.ibm.com, alifm@linux.ibm.com, brueckner@linux.ibm.com, pierrick.bouvier@oss.qualcomm.com, jdaley@linux.ibm.com Subject: [PATCH v17 11/34] s390x/diag: Introduce DIAG 508 for secure IPL operations Date: Thu, 30 Jul 2026 17:46:00 -0400 Message-ID: <20260730214624.2328883-12-zycai@linux.ibm.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260730214624.2328883-1-zycai@linux.ibm.com> References: <20260730214624.2328883-1-zycai@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: QkYKUtQyB2BufR1HVDic38aNk-BBlwDn X-Proofpoint-Spam-Info: AW1haW4tMjYwNzMwMDE1NCBTYWx0ZWRfX1eGXys7lxFtY YPAfDsd2QXVMjgJvpYCdrHmlovSj3Q08C2Ja4UszA+f3o4TIGgGXMXq95PBU7nBgcn0703dZQ0S Jmi7R42y5HqMOnZHXZBBWMznSETJc80= X-Authority-Analysis: v=2.4 cv=E/z9Y6dl c=1 sm=1 tr=0 ts=6a6bc64e cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=RAioF0-LDSMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=VnNF1IyMAAAA:8 a=20KFwNOVAAAA:8 a=hXQcL9AfcS-IPDpH2m0A:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzMwMDE1NCBTYWx0ZWRfX1aE5meP6yB/T NAmPf+Q35scZCTQxfUysiaF8qBk0Zvdo3VM/LqJsoFn6OQIabNHZSmZmgVhEnJbOk+mVkRTNE7L R9osV5wFHZF4ukxKZuZl1qsL+SE2Xkjla2LZS1ELkTZwpUCGg4zSMXdfaeM/UM/gemxz/h5ZcZu eQHGls7qSzVT8AcOItwCr3w1VGWZBFL9pY1CpLu5YDk+nkccUZOuxRM6zXgX3kB0UB3GR/or1Dc 5Gxmws3+FaBklOvzVNF3uzC0cBLJMcj3rVldPZLIQq8jykVJa18XWxhhpRy2qsl5XYwoxB6YVh2 mN3x+InFBHOOaN0KV6KfKp5FZLTA84MRTC+vigp+YUE8nt4/wzyTT82wmx0MjFjZw/0nW95VKP1 zhWIO/FKr2A0B7lplleS5iEfuNe+5YXT9HDcOWzgXVQM1Fkc4PhGChAcaXARN+035cvjdUXhy2d A/69ZYOtGTEuahyXQgQ== X-Proofpoint-GUID: QkYKUtQyB2BufR1HVDic38aNk-BBlwDn X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-30_06,2026-07-30_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 priorityscore=1501 spamscore=0 clxscore=1015 phishscore=0 lowpriorityscore=0 bulkscore=0 malwarescore=0 impostorscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607300154 Received-SPF: pass client-ip=148.163.158.5; envelope-from=zycai@linux.ibm.com; helo=mx0b-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_H3=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: Collin Walling In order to support secure IPL (aka secure boot) for the s390-ccw BIOS, a new s390 DIAGNOSE instruction is introduced to leverage QEMU for handling operations such as signature verification and certificate retrieval. Currently, only subcode 0 is supported with this patch, which is used to query a bitmap of which subcodes are supported. Signed-off-by: Collin Walling Reviewed-by: Farhan Ali Reviewed-by: Thomas Huth --- docs/specs/s390x-secure-ipl.rst | 18 ++++++++++++++++++ include/hw/s390x/ipl/diag508.h | 15 +++++++++++++++ target/s390x/diag.c | 27 +++++++++++++++++++++++++++ target/s390x/kvm/kvm.c | 14 ++++++++++++++ target/s390x/s390x-internal.h | 2 ++ target/s390x/tcg/misc_helper.c | 7 +++++++ 6 files changed, 83 insertions(+) create mode 100644 include/hw/s390x/ipl/diag508.h diff --git a/docs/specs/s390x-secure-ipl.rst b/docs/specs/s390x-secure-ipl.rst index 99052041c1..776270d816 100644 --- a/docs/specs/s390x-secure-ipl.rst +++ b/docs/specs/s390x-secure-ipl.rst @@ -66,3 +66,21 @@ Subcode 2 - store verification certificates contiguously in a VCE (with zero-padding). Following the header, the key-id is immediately stored. The hash and certificate data follow and may be accessed via the respective offset fields stored in the VCE. + + +Secure IPL Data Structures, Facilities, and Functions +----------------------------------------------------- + +DIAGNOSE function code 'X'508' - IPL extensions +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +DIAGNOSE 'X'508' is reserved for guest use in order to facilitate communication +of additional IPL operations that cannot be handled by guest code, such as +signature verification for secure IPL. + +If the function code specifies 0x508, IPL extension functions are performed. +These functions are meant to provide extended functionality for s390 guest boot +that requires assistance from QEMU. + +Subcode 0 - query installed subcodes + Returns a 64-bit mask indicating which subcodes are supported. diff --git a/include/hw/s390x/ipl/diag508.h b/include/hw/s390x/ipl/diag508.h new file mode 100644 index 0000000000..6281ad8299 --- /dev/null +++ b/include/hw/s390x/ipl/diag508.h @@ -0,0 +1,15 @@ +/* + * S/390 DIAGNOSE 508 definitions and structures + * + * Copyright 2025 IBM Corp. + * Author(s): Collin Walling + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#ifndef S390X_DIAG508_H +#define S390X_DIAG508_H + +#define DIAG_508_SUBC_QUERY_SUBC 0x0000 + +#endif diff --git a/target/s390x/diag.c b/target/s390x/diag.c index 5221bb1956..5b09eae1ea 100644 --- a/target/s390x/diag.c +++ b/target/s390x/diag.c @@ -20,6 +20,7 @@ #include "hw/s390x/cert-store.h" #include "hw/s390x/ipl.h" #include "hw/s390x/ipl/diag320.h" +#include "hw/s390x/ipl/diag508.h" #include "hw/s390x/s390-virtio-ccw.h" #include "system/kvm.h" #include "kvm/kvm_s390x.h" @@ -618,3 +619,29 @@ void handle_diag_320(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra) break; } } + +void handle_diag_508(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra) +{ + uint64_t subcode = env->regs[r3]; + int rc; + + if (env->psw.mask & PSW_MASK_PSTATE) { + s390_program_interrupt(env, PGM_PRIVILEGED, ra); + return; + } + + if ((subcode & ~0x0ffffULL) || (r1 & 1)) { + s390_program_interrupt(env, PGM_SPECIFICATION, ra); + return; + } + + switch (subcode) { + case DIAG_508_SUBC_QUERY_SUBC: + rc = 0; + break; + default: + s390_program_interrupt(env, PGM_SPECIFICATION, ra); + return; + } + env->regs[r1 + 1] = rc; +} diff --git a/target/s390x/kvm/kvm.c b/target/s390x/kvm/kvm.c index ee6ff05321..3e58997470 100644 --- a/target/s390x/kvm/kvm.c +++ b/target/s390x/kvm/kvm.c @@ -102,6 +102,7 @@ #define DIAG_CERT_STORE 0x320 #define DIAG_KVM_HYPERCALL 0x500 #define DIAG_KVM_BREAKPOINT 0x501 +#define DIAG_SECURE_IPL 0x508 #define ICPT_INSTRUCTION 0x04 #define ICPT_PROGRAM 0x08 @@ -1544,6 +1545,16 @@ static void kvm_handle_diag_320(S390CPU *cpu, struct kvm_run *run) handle_diag_320(&cpu->env, r1, r3, RA_IGNORED); } +static void kvm_handle_diag_508(S390CPU *cpu, struct kvm_run *run) +{ + uint64_t r1, r3; + + r1 = (run->s390_sieic.ipa & 0x00f0) >> 4; + r3 = run->s390_sieic.ipa & 0x000f; + + handle_diag_508(&cpu->env, r1, r3, RA_IGNORED); +} + #define DIAG_KVM_CODE_MASK 0x000000000000ffff static int handle_diag(S390CPU *cpu, struct kvm_run *run, uint32_t ipb) @@ -1577,6 +1588,9 @@ static int handle_diag(S390CPU *cpu, struct kvm_run *run, uint32_t ipb) case DIAG_CERT_STORE: kvm_handle_diag_320(cpu, run); break; + case DIAG_SECURE_IPL: + kvm_handle_diag_508(cpu, run); + break; default: trace_kvm_insn_diag(func_code); kvm_s390_program_interrupt(cpu, PGM_SPECIFICATION); diff --git a/target/s390x/s390x-internal.h b/target/s390x/s390x-internal.h index 1945bdf40c..81da207a5f 100644 --- a/target/s390x/s390x-internal.h +++ b/target/s390x/s390x-internal.h @@ -390,6 +390,8 @@ bool handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra); void handle_diag_320(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra); +void handle_diag_508(CPUS390XState *env, uint64_t r1, uint64_t r3, + uintptr_t ra); /* translate.c */ diff --git a/target/s390x/tcg/misc_helper.c b/target/s390x/tcg/misc_helper.c index 403388145e..f1c8563af0 100644 --- a/target/s390x/tcg/misc_helper.c +++ b/target/s390x/tcg/misc_helper.c @@ -154,6 +154,13 @@ void HELPER(diag)(CPUS390XState *env, uint32_t r1, uint32_t r3, uint32_t num) bql_unlock(); r = 0; break; + case 0x508: + /* secure ipl operations */ + bql_lock(); + handle_diag_508(env, r1, r3, GETPC()); + bql_unlock(); + r = 0; + break; default: r = -1; break; -- 2.55.0