From patchwork Thu Jun 25 15:07:23 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Collin Walling X-Patchwork-Id: 11625531 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 12751913 for ; Thu, 25 Jun 2020 15:07:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 02A7F20767 for ; Thu, 25 Jun 2020 15:07:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2405777AbgFYPHx (ORCPT ); Thu, 25 Jun 2020 11:07:53 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:12612 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2405765AbgFYPHx (ORCPT ); Thu, 25 Jun 2020 11:07:53 -0400 Received: from pps.filterd (m0098399.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 05PF4pPJ100577; Thu, 25 Jun 2020 11:07:52 -0400 Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 31vbn79rrj-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 25 Jun 2020 11:07:50 -0400 Received: from m0098399.ppops.net (m0098399.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id 05PF4tID100780; Thu, 25 Jun 2020 11:07:50 -0400 Received: from ppma01wdc.us.ibm.com (fd.55.37a9.ip4.static.sl-reverse.com [169.55.85.253]) by mx0a-001b2d01.pphosted.com with ESMTP id 31vbn79rku-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 25 Jun 2020 11:07:50 -0400 Received: from pps.filterd (ppma01wdc.us.ibm.com [127.0.0.1]) by ppma01wdc.us.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 05PF5jvJ008830; Thu, 25 Jun 2020 15:07:38 GMT Received: from b01cxnp23034.gho.pok.ibm.com (b01cxnp23034.gho.pok.ibm.com [9.57.198.29]) by ppma01wdc.us.ibm.com with ESMTP id 31uurtcwg9-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 25 Jun 2020 15:07:38 +0000 Received: from b01ledav006.gho.pok.ibm.com (b01ledav006.gho.pok.ibm.com [9.57.199.111]) by b01cxnp23034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 05PF7aCx48759278 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 25 Jun 2020 15:07:36 GMT Received: from b01ledav006.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 796DCAC065; Thu, 25 Jun 2020 15:07:36 +0000 (GMT) Received: from b01ledav006.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 487CDAC064; Thu, 25 Jun 2020 15:07:36 +0000 (GMT) Received: from localhost.localdomain.com (unknown [9.85.202.75]) by b01ledav006.gho.pok.ibm.com (Postfix) with ESMTP; Thu, 25 Jun 2020 15:07:36 +0000 (GMT) From: Collin Walling To: kvm@vger.kernel.org, linux-s390@vger.kernel.org Cc: pbonzini@redhat.com, borntraeger@de.ibm.com, frankja@linux.ibm.com, david@redhat.com, cohuck@redhat.com, imbrenda@linux.ibm.com, heiko.carstens@de.ibm.com, gor@linux.ibm.com, thuth@redhat.com Subject: [PATCH v2 1/2] docs: kvm: add documentation for KVM_CAP_S390_DIAG318 Date: Thu, 25 Jun 2020 11:07:23 -0400 Message-Id: <20200625150724.10021-2-walling@linux.ibm.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200625150724.10021-1-walling@linux.ibm.com> References: <20200625150724.10021-1-walling@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216,18.0.687 definitions=2020-06-25_11:2020-06-25,2020-06-25 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 spamscore=0 adultscore=0 impostorscore=0 mlxscore=0 phishscore=0 priorityscore=1501 cotscore=-2147483648 suspectscore=8 bulkscore=0 clxscore=1015 lowpriorityscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006250098 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Documentation for the s390 DIAGNOSE 0x318 instruction handling. Signed-off-by: Collin Walling Reviewed-by: Cornelia Huck Reviewed-by: David Hildenbrand --- Documentation/virt/kvm/api.rst | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst index 426f94582b7a..e0b4f2088c46 100644 --- a/Documentation/virt/kvm/api.rst +++ b/Documentation/virt/kvm/api.rst @@ -6150,3 +6150,23 @@ KVM can therefore start protected VMs. This capability governs the KVM_S390_PV_COMMAND ioctl and the KVM_MP_STATE_LOAD MP_STATE. KVM_SET_MP_STATE can fail for protected guests when the state change is invalid. + +8.24 KVM_CAP_S390_DIAG318 +------------------------- + +:Architecture: s390 + +This capability enables a guest to set information about its control program +(i.e. guest kernel type and version). The information is helpful during +system/firmware service events, providing additional data about the guest +environments running on the machine. + +The information is associated with the DIAGNOSE 0x318 instruction, which sets +an 8-byte value consisting of a one-byte Control Program Name Code (CPNC) and +a 7-byte Control Program Version Code (CPVC). The CPNC determines what +environment the control program is running in (e.g. Linux, z/VM...), and the +CPVC is used for information specific to OS (e.g. Linux version, Linux +distribution...) + +If this capability is available, then the CPNC and CPVC can be synchronized +between KVM and userspace via the sync regs mechanism (KVM_SYNC_DIAG318).