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=-11.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 18A33C433E0 for ; Mon, 15 Feb 2021 16:14:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C683764DF0 for ; Mon, 15 Feb 2021 16:14:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231476AbhBOQOG (ORCPT ); Mon, 15 Feb 2021 11:14:06 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:53836 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S232073AbhBOQHm (ORCPT ); Mon, 15 Feb 2021 11:07:42 -0500 Received: from pps.filterd (m0098413.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 11FG3aOA013139; Mon, 15 Feb 2021 11:06:57 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id; s=pp1; bh=Fy/DKkEzhd8xImotol5a9TJJIiFsNRY/JVH6JyH8xXk=; b=eILGckVrcgPllwPOAiTGFNle2kr1Da6rzCFCppLc6fpsv0PsXgWQqaxxEu+PpP1wyB5S ipvJbeODf8RQtHOj21jI4wB3MgQVAmwDX6hKyXHllitfwQ84P2cVeUV/chIUK2OSWa6f wbX5WAjfHZvXmGjzbgzO3SGCaZypUOqiUckx6MCREm8wpG/iabWicrl+3vnlVHVqIviV 3KS51ShLjRltCWx/UePiWuSC42KR6M7IJ5xyg/L71qANoUM5u1NszWXIfNBPCakREGqg ukZb4qTngIDOFpXIuvt20dF+LmCkHQsfpPMcU2g1bFQffTpcjsQpUfwgFwODg6NIWUbS 5g== Received: from pps.reinject (localhost [127.0.0.1]) by mx0b-001b2d01.pphosted.com with ESMTP id 36qutyrr7a-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 15 Feb 2021 11:06:57 -0500 Received: from m0098413.ppops.net (m0098413.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id 11FG4Xd5018190; Mon, 15 Feb 2021 11:06:56 -0500 Received: from ppma04ams.nl.ibm.com (63.31.33a9.ip4.static.sl-reverse.com [169.51.49.99]) by mx0b-001b2d01.pphosted.com with ESMTP id 36qutyrr65-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 15 Feb 2021 11:06:56 -0500 Received: from pps.filterd (ppma04ams.nl.ibm.com [127.0.0.1]) by ppma04ams.nl.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 11FFrKWk008571; Mon, 15 Feb 2021 16:06:55 GMT Received: from b06cxnps4074.portsmouth.uk.ibm.com (d06relay11.portsmouth.uk.ibm.com [9.149.109.196]) by ppma04ams.nl.ibm.com with ESMTP id 36p6d8a0gb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 15 Feb 2021 16:06:55 +0000 Received: from d06av24.portsmouth.uk.ibm.com (d06av24.portsmouth.uk.ibm.com [9.149.105.60]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 11FG6qNm20840812 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 15 Feb 2021 16:06:52 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 51D124203F; Mon, 15 Feb 2021 16:06:52 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id DD96842041; Mon, 15 Feb 2021 16:06:51 +0000 (GMT) Received: from oc3016276355.ibm.com (unknown [9.145.73.68]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 15 Feb 2021 16:06:51 +0000 (GMT) From: Pierre Morel To: kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, borntraeger@de.ibm.com, frankja@linux.ibm.com, cohuck@redhat.com, david@redhat.com, thuth@redhat.com, pmorel@linux.ibm.com Subject: [PATCH v3 0/1] KVM: s390: diag9c forwarding Date: Mon, 15 Feb 2021 17:06:49 +0100 Message-Id: <1613405210-16532-1-git-send-email-pmorel@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369,18.0.761 definitions=2021-02-15_11:2021-02-12,2021-02-15 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 mlxlogscore=961 priorityscore=1501 clxscore=1015 suspectscore=0 malwarescore=0 mlxscore=0 spamscore=0 phishscore=0 impostorscore=0 adultscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2102150124 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org This patch will forward the yieldto hypercall (diag9c) if in the host the target CPU is also not running. As we do not yet have performance data (and recommendations) the default is turned off, but this can be changed during runtime. Pierre Morel (1): s390:kvm: diag9c forwarding Documentation/virt/kvm/s390-diag.rst | 33 ++++++++++++++++++++++++++++ arch/s390/include/asm/kvm_host.h | 1 + arch/s390/include/asm/smp.h | 1 + arch/s390/kernel/smp.c | 1 + arch/s390/kvm/diag.c | 31 +++++++++++++++++++++++--- arch/s390/kvm/kvm-s390.c | 6 +++++ arch/s390/kvm/kvm-s390.h | 8 +++++++ 7 files changed, 78 insertions(+), 3 deletions(-) -- 2.17.1 Changelog: >From v2: - update overrun comparison, avoid comparison on unsigned (Pierre) >From v1: - more precise comments (Connie) - Documentation (Janosch)