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 X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 38AFECA9EB5 for ; Mon, 4 Nov 2019 14:05:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0C14521D71 for ; Mon, 4 Nov 2019 14:05:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729236AbfKDOFS (ORCPT ); Mon, 4 Nov 2019 09:05:18 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:54852 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728595AbfKDOFR (ORCPT ); Mon, 4 Nov 2019 09:05:17 -0500 Received: from pps.filterd (m0098414.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id xA4DrojR107941 for ; Mon, 4 Nov 2019 09:05:16 -0500 Received: from e06smtp01.uk.ibm.com (e06smtp01.uk.ibm.com [195.75.94.97]) by mx0b-001b2d01.pphosted.com with ESMTP id 2w2n51gyrk-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Mon, 04 Nov 2019 09:05:16 -0500 Received: from localhost by e06smtp01.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Mon, 4 Nov 2019 14:05:10 -0000 Received: from b06wcsmtp001.portsmouth.uk.ibm.com (b06wcsmtp001.portsmouth.uk.ibm.com [9.149.105.160]) by b06avi18878370.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id xA4E59uB42533362 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 4 Nov 2019 14:05:09 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 626DAA406A; Mon, 4 Nov 2019 14:05:09 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0ED3CA4054; Mon, 4 Nov 2019 14:05:09 +0000 (GMT) Received: from oc7455500831.ibm.com (unknown [9.152.224.123]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 4 Nov 2019 14:05:08 +0000 (GMT) Subject: Re: [RFC 14/37] KVM: s390: protvirt: Implement interruption injection To: David Hildenbrand , Janosch Frank , kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, thuth@redhat.com, imbrenda@linux.ibm.com, mihajlov@linux.ibm.com, mimu@linux.ibm.com, cohuck@redhat.com, gor@linux.ibm.com References: <20191024114059.102802-1-frankja@linux.ibm.com> <20191024114059.102802-15-frankja@linux.ibm.com> From: Christian Borntraeger Openpgp: preference=signencrypt Autocrypt: addr=borntraeger@de.ibm.com; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 x-cbid: 19110414-4275-0000-0000-0000037AA23C X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19110414-4276-0000-0000-0000388DE913 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-11-04_08:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=316 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1911040136 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 04.11.19 11:29, David Hildenbrand wrote: > On 24.10.19 13:40, Janosch Frank wrote: >> From: Michael Mueller >> >> The patch implements interruption injection for the following >> list of interruption types: >> >>    - I/O >>      __deliver_io (III) >> >>    - External >>      __deliver_cpu_timer (IEI) >>      __deliver_ckc (IEI) >>      __deliver_emergency_signal (IEI) >>      __deliver_external_call (IEI) >>      __deliver_service (IEI) >> >>    - cpu restart >>      __deliver_restart (IRI) > > What exactly is IRQ_PEND_EXT_SERVICE_EV? Can you add some comments whet the new interrupt does and why it is needed in this context? Thanks I did that code. What about the following add-on description. The ultravisor does several checks on injected interrupts. For example it will check that for an sclp interrupt with an sccb address we had an servc exit and exit with a validity intercept. As the hypervisor must avoid valitity intercepts we now mask invalid interrupts. There are also sclp interrupts that only inject an event (e.g. an input event on the sclp consoles) those interrupts must not be masked. Let us split out these "event interupts" from the normal sccb interrupts into IRQ_PEND_EXT_SERVICE_EV.