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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1F31CCCD190 for ; Mon, 13 Oct 2025 10:20:18 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1v8Fdx-0003Rb-2v; Mon, 13 Oct 2025 06:19:05 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1v8Fdo-0003QM-6a; Mon, 13 Oct 2025 06:18:56 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1v8Fdl-0004G4-7m; Mon, 13 Oct 2025 06:18:55 -0400 Received: from pps.filterd (m0360072.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 59D309UJ024843; Mon, 13 Oct 2025 10:18:48 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=pp1; bh=4xAZvQ MWCiPLCOaAkwYfhpQ8b3Lu5ChfqzqzYe65oLI=; b=PgkRN7M9++pRYQOxlHqWjx TsSolSNuhu15zF/FpsrVtrK34LmATlMFnm++Nhlp8c/H6xy1pziJpXJ+vX2rS6uY y1NnG/yFrzKhXttVNy19G5Mb7PrTHa6/SgC056DAkGi9d/ejI3LRJCyjuyzHJ1kK 5kDD3pWtmt+IMT+nOKCFrIsH6HEYAYRjLw8VLmkWrZ2ANmV59q2GsyGlusAXl5RI k660GdO0if1ZgOmAgJo9RUo0YW4GzXKjOiczAhrxawEEfpnB+yTdZglAZ5LJjiyU aDWQUPrfPjO0awCHFLJeqjH11mRNsHCnJTMArFimTV+obMczMZkisQEuWgw00TlA == Received: from ppma23.wdc07v.mail.ibm.com (5d.69.3da9.ip4.static.sl-reverse.com [169.61.105.93]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 49qevyr3u2-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 13 Oct 2025 10:18:48 +0000 (GMT) Received: from pps.filterd (ppma23.wdc07v.mail.ibm.com [127.0.0.1]) by ppma23.wdc07v.mail.ibm.com (8.18.1.2/8.18.1.2) with ESMTP id 59D6R4na016705; Mon, 13 Oct 2025 10:18:47 GMT Received: from smtprelay04.fra02v.mail.ibm.com ([9.218.2.228]) by ppma23.wdc07v.mail.ibm.com (PPS) with ESMTPS id 49r32jn77d-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 13 Oct 2025 10:18:47 +0000 Received: from smtpav05.fra02v.mail.ibm.com (smtpav05.fra02v.mail.ibm.com [10.20.54.104]) by smtprelay04.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 59DAIgNm31589042 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 13 Oct 2025 10:18:42 GMT Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 959F82004D; Mon, 13 Oct 2025 10:18:42 +0000 (GMT) Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0B3E72004B; Mon, 13 Oct 2025 10:18:42 +0000 (GMT) Received: from li-ce58cfcc-320b-11b2-a85c-85e19b5285e0 (unknown [9.111.38.192]) by smtpav05.fra02v.mail.ibm.com (Postfix) with SMTP; Mon, 13 Oct 2025 10:18:41 +0000 (GMT) Date: Mon, 13 Oct 2025 12:18:40 +0200 From: Halil Pasic To: Matthew Rosato Cc: qemu-s390x@nongnu.org, farman@linux.ibm.com, thuth@redhat.com, borntraeger@linux.ibm.com, richard.henderson@linaro.org, david@redhat.com, iii@linux.ibm.com, alifm@linux.ibm.com, qemu-devel@nongnu.org, Halil Pasic Subject: Re: [PATCH v3] s390x/pci: set kvm_msi_via_irqfd_allowed Message-ID: <20251013121840.2056babb.pasic@linux.ibm.com> In-Reply-To: <20251008203350.354121-1-mjrosato@linux.ibm.com> References: <20251008203350.354121-1-mjrosato@linux.ibm.com> Organization: IBM X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.32; x86_64-redhat-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: LGz8y5YWoYYd-VCGoGBBTCUOrUtgJIlC X-Authority-Analysis: v=2.4 cv=eJkeTXp1 c=1 sm=1 tr=0 ts=68ecd208 cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=kj9zAlcOel0A:10 a=x6icFKpwvdMA:10 a=VnNF1IyMAAAA:8 a=bf3z2jQr7r-_6UqURtQA:9 a=CjuIK1q_8ugA:10 a=cPQSjfK2_nFv0Q5t_7PE:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMDExMDAxNCBTYWx0ZWRfX/MGKayV35iPW aVftUCngIdhlnLcvWcyDaZPGvd0I+pMBBt7w3o2uoW4soSJ51qC3S5MT2zVuimOj7NEh/yV0IF9 E61In+Huyeej7iEGtBu4mC8TDW9qoHUMzgm0Is+yuXFxv31HDlZ9OBuoL47SN9gia4U7BWe4G5A WiiSkQxl5IF8DENcs1+TJ9Qv5dPj4HGh10pQkzgFpuzyKSjLr/FBGJukZqeLPyc/yjvn1JeQB+8 EWB6F2ddf5U2+eXPMiSE3nNYy3FiTdrAfZdKKGcdn/76irXcpwvkfEeYV/iDx13PTiZgVHxUTi4 IPSqSh6EWo7Y39YRJLBOMkc28bpMYwKuHugBazWZW1s3vz24fucyvciIoZtCGn4LEkQBYBV3ueZ IE/sqWSSrPO3SyPn3quKz9UbkBxOaA== X-Proofpoint-GUID: LGz8y5YWoYYd-VCGoGBBTCUOrUtgJIlC X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1117,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-10-13_04,2025-10-06_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 lowpriorityscore=0 spamscore=0 clxscore=1015 impostorscore=0 phishscore=0 malwarescore=0 adultscore=0 priorityscore=1501 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2510020000 definitions=main-2510110014 Received-SPF: pass client-ip=148.163.158.5; envelope-from=pasic@linux.ibm.com; helo=mx0b-001b2d01.pphosted.com X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Wed, 8 Oct 2025 16:33:50 -0400 Matthew Rosato wrote: > Allow irqfd to be used for virtio-pci on s390x if the kernel supports > it. This improves s390x virtio-pci performance when using kvm > acceleration by allowing kvm to deliver interrupts instead of QEMU. > > Signed-off-by: Matthew Rosato Reviewed-by: Halil Pasic