From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3C22C2744F for ; Mon, 16 Feb 2026 06:29:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.163.158.5 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771223369; cv=none; b=PNqWy2xe1Pp48wzyM5/OHxjTyB8EjmEQDjJaHYUSFiFlmE2uXr3hVqwKNtpekkAH1KtAJ0JwydDfoX+fRZ8+LCgyEnw5+zrv4fRcQfKMydhqYJCOctsnRILzU64XFiNQvssltu1vT8z5hHA/+xXcQIo9hsVzuh1u/6asaPf3aiA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771223369; c=relaxed/simple; bh=zQHZUG+5Q1s04Lp786znYjaEL+UnuGeLxVFCY7iEpcE=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=lea89tXOv056KH7rMOvmlg7I2Tqb/RpAebeBSwi5EQj+n0Q4Uyq/DWzsGPmRAIcJaqB7OLA9/di9vBT2c0Gkcpm3dhoygzh5XiIrubfOIyWugBEq+/A79Tvte+7jDaGPyLSxqx3zKcCJtFh0GQJHg6TRGr8UbEcsZUG5X+y5550= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com; spf=pass smtp.mailfrom=linux.ibm.com; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b=CwkCukL6; arc=none smtp.client-ip=148.163.158.5 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="CwkCukL6" 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 61FLeRP53631665; Mon, 16 Feb 2026 06:29:21 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:date:from:message-id:mime-version :subject:to; s=pp1; bh=sLdy+1+jDG8t7qH8K8wqnya/kQPdeXMTNShmHEWAG RE=; b=CwkCukL6b4+W33UhhTDVCDII5QuxJfupxjK0NvBlfbYCRJBLZy+NL/wYe pxSvWRSb9/IYcJxxtBTIgSCq9yC6qyjAHpnzHiFZjCm5Cj0j2y69IsMneOvXPDjI xOtGGJmpCWcAJmrTz3gLjb3eSUka5WqcI2yD9IUTlhNb32fSjHrdT7yEHbC92Xki QWPALnk6JPC8rLS2U1Dvde1LygisC19FLEGMBvD0yc+WZpZb8v8JoxUgxGN6XpjI mvwzXQD2dzMLQAX7QrwHBiY5wElByOfVruywsOkUCZdBmL+cBzH75ipOHUsLt6zb OuMV371vLfrSLm1nog6V9yey9ksAA== 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 4cajcj60qv-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 16 Feb 2026 06:29:21 +0000 (GMT) Received: from pps.filterd (ppma11.dal12v.mail.ibm.com [127.0.0.1]) by ppma11.dal12v.mail.ibm.com (8.18.1.2/8.18.1.2) with ESMTP id 61G3P2tS029073; Mon, 16 Feb 2026 06:29:20 GMT Received: from smtprelay05.fra02v.mail.ibm.com ([9.218.2.225]) by ppma11.dal12v.mail.ibm.com (PPS) with ESMTPS id 4cb63140tf-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 16 Feb 2026 06:29:20 +0000 Received: from smtpav05.fra02v.mail.ibm.com (smtpav05.fra02v.mail.ibm.com [10.20.54.104]) by smtprelay05.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 61G6THAL31260978 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 16 Feb 2026 06:29:17 GMT Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E4F5720043; Mon, 16 Feb 2026 06:29:16 +0000 (GMT) Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C3CD520040; Mon, 16 Feb 2026 06:29:16 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.87.85.9]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 16 Feb 2026 06:29:16 +0000 (GMT) From: Alexander Egorenkov To: akpm@linux-foundation.org, bhe@redhat.com, gor@linux.ibm.com, hca@linux.ibm.com, agordeev@linux.ibm.com Cc: kexec@lists.infradead.org, linux-s390@vger.kernel.org Subject: [PATCH v2 1/1] s390/kexec: Make KEXEC_SIG available when CONFIG_MODULES=n Date: Mon, 16 Feb 2026 07:29:16 +0100 Message-ID: <20260216062916.818071-1-egorenar@linux.ibm.com> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: rqyoeAl6rPuKv2bmwXPx0AsqhJcm9Qme X-Authority-Analysis: v=2.4 cv=Md9hep/f c=1 sm=1 tr=0 ts=6992b941 cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=HzLeVaNsDn8A:10 a=VkNPw1HP01LnGYTKEx00:22 a=Mpw57Om8IfrbqaoTuvik:22 a=GgsMoib0sEa3-_RKJdDe:22 a=VnNF1IyMAAAA:8 a=xCAFoSNEsD0Fk5WBT_MA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjE2MDA1MCBTYWx0ZWRfX7Wel10NfqARt 9SdTaNdwbeeqhFyX4ePgfLq/QVcBZDexeJnzQamyvJ7vhZMeCtsh37qVjkQdrE8VNDDORKH0tU7 QtSGhBGiSpKgg+OLC7njNRThCysoZqrfyW8ltHHPxoNUh3y1dprQeVdW5v00n4i3cDYBkU19Go2 um0xlPYpUZ4CQFTxj20OSbmvb38F3BUuNo8T7g/8/EajRaU6zOG6V4LNx1DFCbNOb1ctD5inHXc NJcEcosiJgYknbAo/38MIE0xXOnR4m5IWiXzxNAXt1U1bBPm42qcGTvER5M06G1FiS3Q1iDXU0G CJiduBIS5fv0x4Qijt9TRJ3VTa5Iicx1HzCe0LHm5EyVLGN6RrxAtRFOQkLVujs4/GyPNcEr/ga 3Kghp9ZkaADravFqpUlyJ2YmVrR+wWPoYIqNc1VOsVMqeUtvOXZpKL2IstgxDseWI2fx6BcZxS5 V96ZEz6Vw6pQ7zQ1OkA== X-Proofpoint-GUID: rqyoeAl6rPuKv2bmwXPx0AsqhJcm9Qme X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-02-16_02,2026-02-13_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 impostorscore=0 lowpriorityscore=0 spamscore=0 adultscore=0 priorityscore=1501 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2602160050 The commit c8424e776b09 ("MODSIGN: Export module signature definitions") replaced the dependency of KEXEC_SIG on SYSTEM_DATA_VERIFICATION with the dependency on MODULE_SIG_FORMAT. This change disables KEXEC_SIG in s390 kernels built with MODULES=n if nothing else selects MODULE_SIG_FORMAT. Furthermore, the signature verification in s390 kexec does not require MODULE_SIG_FORMAT because it requires only the struct module_signature and, therefore, does not depend on code in kernel/module_signature.c. But making ARCH_SUPPORTS_KEXEC_SIG depend on SYSTEM_DATA_VERIFICATION is also incorrect because it makes KEXEC_SIG available on s390 only if some other arbitrary option (for instance a file system or device driver) selects it directly or indirectly. To properly make KEXEC_SIG available for s390 kernels built with MODULES=y as well as MODULES=n _and_ also not depend on arbitrary options selecting SYSTEM_DATA_VERIFICATION, we set ARCH_SUPPORTS_KEXEC_SIG=y for s390 and select SYSTEM_DATA_VERIFICATION when KEXEC_SIG=y. Fixes: c8424e776b09 ("MODSIGN: Export module signature definitions") Suggested-by: Heiko Carstens Signed-off-by: Alexander Egorenkov --- Changes v1 -> v2: - Let S390 config option select SYSTEM_DATA_VERIFICATION if KEXEC_SIG is selected arch/s390/Kconfig | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index c2c7bf974397..edc927d9e85a 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -279,6 +279,7 @@ config S390 select SPARSE_IRQ select SWIOTLB select SYSCTL_EXCEPTION_TRACE + select SYSTEM_DATA_VERIFICATION if KEXEC_SIG select THREAD_INFO_IN_TASK select TRACE_IRQFLAGS_SUPPORT select TTY @@ -313,7 +314,7 @@ config ARCH_SUPPORTS_KEXEC_FILE def_bool y config ARCH_SUPPORTS_KEXEC_SIG - def_bool MODULE_SIG_FORMAT + def_bool y config ARCH_SUPPORTS_KEXEC_PURGATORY def_bool y -- 2.51.0