From patchwork Fri Feb 4 15:53:47 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claudio Imbrenda X-Patchwork-Id: 12735257 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 673CDC43219 for ; Fri, 4 Feb 2022 15:54:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1376587AbiBDPy3 (ORCPT ); Fri, 4 Feb 2022 10:54:29 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:9604 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1376367AbiBDPyH (ORCPT ); Fri, 4 Feb 2022 10:54:07 -0500 Received: from pps.filterd (m0098393.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 214E8K96006648; Fri, 4 Feb 2022 15:54:07 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=Quhfip8/AtFST9/2dPpR4TNIuCHI1BKc+UcODKSOCY4=; b=I3zj8N+CMVcQsYtnVm/PtWkR/oD6INfgE3k7srm+suSi3s0nW0XZBfAwbUVPp6LlC+Py AUCbHb1gB0h8KKjMoUZufQfIeuPomtI5QG8RNUsiP0hrIauSDolSbhynyQrOpxqioA+K HRT0zNTPHBjF3yy6JENcGMJuDuuWIgiliNlLnRHShNa5BRj4R3t+t3kRwhLFLKxExTLJ V6NG4/Bgv0h8Fq0oBsH45vgJX/xmrQfQA2j4GfqmeMC+WLbImpPEgeSJ7MPyluSf4HSY sk836VNv6HdXOFQA6ud1ujbYCUB5K6hW2Bwr8DRPbUadQfnnFcu2K1XyFvh7o5wnQN9g 1g== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 3e0r12gahg-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 04 Feb 2022 15:54:07 +0000 Received: from m0098393.ppops.net (m0098393.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.43/8.16.0.43) with SMTP id 214EFK8A013356; Fri, 4 Feb 2022 15:54:06 GMT Received: from ppma03ams.nl.ibm.com (62.31.33a9.ip4.static.sl-reverse.com [169.51.49.98]) by mx0a-001b2d01.pphosted.com with ESMTP id 3e0r12gagk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 04 Feb 2022 15:54:06 +0000 Received: from pps.filterd (ppma03ams.nl.ibm.com [127.0.0.1]) by ppma03ams.nl.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 214Fn6uD005890; Fri, 4 Feb 2022 15:54:04 GMT Received: from b06cxnps3075.portsmouth.uk.ibm.com (d06relay10.portsmouth.uk.ibm.com [9.149.109.195]) by ppma03ams.nl.ibm.com with ESMTP id 3e0r0spad1-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 04 Feb 2022 15:54:04 +0000 Received: from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06cxnps3075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 214Fs0hR42140078 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 4 Feb 2022 15:54:00 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 04B57AE05D; Fri, 4 Feb 2022 15:54:00 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 76293AE051; Fri, 4 Feb 2022 15:53:59 +0000 (GMT) Received: from p-imbrenda.bredband2.com (unknown [9.145.8.50]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 4 Feb 2022 15:53:59 +0000 (GMT) From: Claudio Imbrenda To: kvm@vger.kernel.org Cc: borntraeger@de.ibm.com, frankja@linux.ibm.com, thuth@redhat.com, pasic@linux.ibm.com, david@redhat.com, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, scgl@linux.ibm.com Subject: [PATCH v7 15/17] KVM: s390: pv: api documentation for asynchronous destroy Date: Fri, 4 Feb 2022 16:53:47 +0100 Message-Id: <20220204155349.63238-16-imbrenda@linux.ibm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220204155349.63238-1-imbrenda@linux.ibm.com> References: <20220204155349.63238-1-imbrenda@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 2ba7bUvp14zc4EPa4LENPk8IiL2usfre X-Proofpoint-ORIG-GUID: EJQtjSdphsYJi57EaOXQJbla3dlWBgrA 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=2022-02-04_07,2022-02-03_01,2021-12-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 impostorscore=0 malwarescore=0 mlxlogscore=999 lowpriorityscore=0 clxscore=1015 bulkscore=0 priorityscore=1501 suspectscore=0 adultscore=0 spamscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2201110000 definitions=main-2202040088 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Add documentation for the new commands added to the KVM_S390_PV_COMMAND ioctl. Signed-off-by: Claudio Imbrenda --- Documentation/virt/kvm/api.rst | 21 ++++++++++++++++++--- 1 file changed, 18 insertions(+), 3 deletions(-) diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst index a4267104db50..3b9068aceead 100644 --- a/Documentation/virt/kvm/api.rst +++ b/Documentation/virt/kvm/api.rst @@ -5010,11 +5010,13 @@ KVM_PV_ENABLE ===== ============================= KVM_PV_DISABLE - Deregister the VM from the Ultravisor and reclaim the memory that had been donated to the Ultravisor, making it usable by the kernel - again. All registered VCPUs are converted back to non-protected - ones. + again. All registered VCPUs are converted back to non-protected + ones. If a previous VM had been prepared for asynchonous teardown + with KVM_PV_ASYNC_DISABLE_PREPARE and not actually torn down with + KVM_PV_ASYNC_DISABLE, it will be torn down in this call together with + the current VM. KVM_PV_VM_SET_SEC_PARMS Pass the image header from VM memory to the Ultravisor in @@ -5027,6 +5029,19 @@ KVM_PV_VM_VERIFY Verify the integrity of the unpacked image. Only if this succeeds, KVM is allowed to start protected VCPUs. +KVM_PV_ASYNC_DISABLE_PREPARE + Prepare the current protected VM for asynchronous teardown. The current + VM will then continue immediately as non-protected. If a protected VM had + already been set aside without starting the teardown process, this call + will fail. In this case the userspace process should issue a normal + KVM_PV_DISABLE. + +KVM_PV_ASYNC_DISABLE + Tear down the protected VM previously set aside for asynchronous teardown. + This PV command should ideally be issued by userspace from a separate + thread. If a fatal signal is received (or the process terminates + naturally), the command will terminate immediately without completing. + 4.126 KVM_X86_SET_MSR_FILTER ----------------------------