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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 812EBC43217 for ; Fri, 25 Nov 2022 12:43:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230040AbiKYMnK (ORCPT ); Fri, 25 Nov 2022 07:43:10 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44318 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229870AbiKYMnI (ORCPT ); Fri, 25 Nov 2022 07:43:08 -0500 Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6073C1AD82; Fri, 25 Nov 2022 04:43:07 -0800 (PST) Received: from pps.filterd (m0098416.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 2APCUkIO030058; Fri, 25 Nov 2022 12:43:06 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 : content-transfer-encoding : mime-version; s=pp1; bh=LQ8G9aExNT8Zyq3aYV+7igQZJ8LQk9rq/MHK/Jx1ZVs=; b=YFNs8cIq62/+mEqyMdPJYIoq68aKWXI0VwHoi81xyrsiwmc5ul11TV1BAz5RvNN0OXUo gwchAHr5PTB6ycj8k9Nril9pBG3pPwDptqC/hDgAeTVhY28UxjhJ+qlssfkcZvDi6pqO zWxGCCc4vAw89tiLiGqlECmsIw2QrzH3mlhvbtpP8WjOHxPGU6jPiTVkyfo5uGvfUwQ7 gde2Home9/9YxSwCtVgthJcIhDKUHG4/uhJqXwurHDU1x0sDPAgiuQ0VXmaRUCEk1TBT LX5KyDP14ZlS8kWAB5NpjDHwPoTS2uD6sEZPzzZzY+2MIR19pWs8YDEGP1XHxlkm/0UK pg== Received: from pps.reinject (localhost [127.0.0.1]) by mx0b-001b2d01.pphosted.com (PPS) with ESMTPS id 3m2wsc86ce-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 25 Nov 2022 12:43:06 +0000 Received: from m0098416.ppops.net (m0098416.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 2APCh6FC009189; Fri, 25 Nov 2022 12:43:06 GMT Received: from ppma01fra.de.ibm.com (46.49.7a9f.ip4.static.sl-reverse.com [159.122.73.70]) by mx0b-001b2d01.pphosted.com (PPS) with ESMTPS id 3m2wsc86by-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 25 Nov 2022 12:43:05 +0000 Received: from pps.filterd (ppma01fra.de.ibm.com [127.0.0.1]) by ppma01fra.de.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 2APCaoWX024016; Fri, 25 Nov 2022 12:43:04 GMT Received: from b06cxnps4074.portsmouth.uk.ibm.com (d06relay11.portsmouth.uk.ibm.com [9.149.109.196]) by ppma01fra.de.ibm.com with ESMTP id 3kxps96xks-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 25 Nov 2022 12:43:04 +0000 Received: from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com [9.149.105.58]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 2APCh1VJ5702242 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 25 Nov 2022 12:43:01 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 01BFB4C046; Fri, 25 Nov 2022 12:43:01 +0000 (GMT) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8589F4C044; Fri, 25 Nov 2022 12:43:00 +0000 (GMT) Received: from li-9fd7f64c-3205-11b2-a85c-df942b00d78d.ibm.com.com (unknown [9.171.63.115]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 25 Nov 2022 12:43:00 +0000 (GMT) From: Janosch Frank To: pbonzini@redhat.com Cc: kvm@vger.kernel.org, frankja@linux.ibm.com, david@redhat.com, borntraeger@de.ibm.com, cohuck@redhat.com, linux-s390@vger.kernel.org, imbrenda@linux.ibm.com, Nico Boehr , Steffen Eiden Subject: [GIT PULL 09/15] KVM: s390: pv: api documentation for asynchronous destroy Date: Fri, 25 Nov 2022 13:39:41 +0100 Message-Id: <20221125123947.31047-10-frankja@linux.ibm.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221125123947.31047-1-frankja@linux.ibm.com> References: <20221125123947.31047-1-frankja@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-GUID: y-74zSwOVq25Q9tbEs18LP3WOgR1xABh X-Proofpoint-ORIG-GUID: GSr5yranmBQmFkkfOZ1gz9_P8VMcPYWz Content-Transfer-Encoding: 8bit X-Proofpoint-UnRewURL: 0 URL was un-rewritten MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.895,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-11-25_04,2022-11-25_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 clxscore=1015 malwarescore=0 spamscore=0 mlxscore=0 suspectscore=0 adultscore=0 lowpriorityscore=0 priorityscore=1501 impostorscore=0 phishscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2210170000 definitions=main-2211250098 Precedence: bulk List-ID: X-Mailing-List: linux-s390@vger.kernel.org From: Claudio Imbrenda Add documentation for the new commands added to the KVM_S390_PV_COMMAND ioctl. Signed-off-by: Claudio Imbrenda Reviewed-by: Nico Boehr Reviewed-by: Steffen Eiden Reviewed-by: Janosch Frank Link: https://lore.kernel.org/r/20221111170632.77622-3-imbrenda@linux.ibm.com Message-Id: <20221111170632.77622-3-imbrenda@linux.ibm.com> Signed-off-by: Janosch Frank --- Documentation/virt/kvm/api.rst | 41 ++++++++++++++++++++++++++++++---- 1 file changed, 37 insertions(+), 4 deletions(-) diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst index eee9f857a986..9175d41e8081 100644 --- a/Documentation/virt/kvm/api.rst +++ b/Documentation/virt/kvm/api.rst @@ -5163,10 +5163,13 @@ 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. + 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. If a + previous protected VM had been prepared for asynchonous teardown with + KVM_PV_ASYNC_CLEANUP_PREPARE and not subsequently torn down with + KVM_PV_ASYNC_CLEANUP_PERFORM, it will be torn down in this call + together with the current protected VM. KVM_PV_VM_SET_SEC_PARMS Pass the image header from VM memory to the Ultravisor in @@ -5289,6 +5292,36 @@ KVM_PV_DUMP authentication tag all of which are needed to decrypt the dump at a later time. +KVM_PV_ASYNC_CLEANUP_PREPARE + :Capability: KVM_CAP_S390_PROTECTED_ASYNC_DISABLE + + Prepare the current protected VM for asynchronous teardown. Most + resources used by the current protected VM will be set aside for a + subsequent asynchronous teardown. The current protected VM will then + resume execution immediately as non-protected. There can be at most + one protected VM prepared for asynchronous teardown at any time. If + a protected VM had already been prepared for teardown without + subsequently calling KVM_PV_ASYNC_CLEANUP_PERFORM, this call will + fail. In that case, the userspace process should issue a normal + KVM_PV_DISABLE. The resources set aside with this call will need to + be cleaned up with a subsequent call to KVM_PV_ASYNC_CLEANUP_PERFORM + or KVM_PV_DISABLE, otherwise they will be cleaned up when KVM + terminates. KVM_PV_ASYNC_CLEANUP_PREPARE can be called again as soon + as cleanup starts, i.e. before KVM_PV_ASYNC_CLEANUP_PERFORM finishes. + +KVM_PV_ASYNC_CLEANUP_PERFORM + :Capability: KVM_CAP_S390_PROTECTED_ASYNC_DISABLE + + Tear down the protected VM previously prepared for teardown with + KVM_PV_ASYNC_CLEANUP_PREPARE. The resources that had been set aside + will be freed during the execution of this command. 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, and the normal + KVM shutdown procedure will take care of cleaning up all remaining + protected VMs, including the ones whose teardown was interrupted by + process termination. + 4.126 KVM_XEN_HVM_SET_ATTR -------------------------- -- 2.38.1