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Wed, 17 Aug 2022 07:05:09 +0000 (GMT) Received: from [9.171.94.247] (unknown [9.171.94.247]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 17 Aug 2022 07:05:09 +0000 (GMT) Message-ID: Date: Wed, 17 Aug 2022 09:10:15 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.3.0 Subject: Re: [PATCH] KVM: s390: pci: VFIO_PCI ZDEV configuration fix Content-Language: en-US To: Matthew Rosato Cc: rdunlap@infradead.org, linux-kernel@vger.kernel.org, lkp@intel.com, borntraeger@linux.ibm.com, farman@linux.ibm.com, linux-s390@vger.kernel.org, kvm@vger.kernel.org References: <1f2dd65e-b79b-44df-cc6a-8b3aa8fd61af@linux.ibm.com> <20220816202855.189410-1-pmorel@linux.ibm.com> From: Pierre Morel In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: WvAS6J0p17BK9pRr6TBJpNge8JPYMzzS X-Proofpoint-GUID: WvAS6J0p17BK9pRr6TBJpNge8JPYMzzS X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.883,Hydra:6.0.517,FMLib:17.11.122.1 definitions=2022-08-17_04,2022-08-16_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 priorityscore=1501 suspectscore=0 adultscore=0 malwarescore=0 mlxlogscore=899 spamscore=0 clxscore=1015 phishscore=0 bulkscore=0 lowpriorityscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2207270000 definitions=main-2208170029 X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_EF,NICE_REPLY_A,RCVD_IN_MSPIKE_H2,SPF_HELO_NONE, SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 8/17/22 00:15, Matthew Rosato wrote: > On 8/16/22 4:28 PM, Pierre Morel wrote: >> Fixing configuration for VFIO PCI interpretation. >> > 4) > CONFIG_KVM=m > CONFIG_VFIO_PCI_CORE=y > CONFIG_VFIO_PCI=y > CONFIG_VFIO_PCI_ZDEV_KVM=m > > fails with: > > ld: drivers/vfio/pci/vfio_pci_core.o: in function `vfio_pci_core_enable': > /usr/src/linux/drivers/vfio/pci/vfio_pci_core.c:320: undefined reference to `vfio_pci_zdev_open_device' > ld: /usr/src/linux/drivers/vfio/pci/vfio_pci_core.c:349: undefined reference to `vfio_pci_zdev_close_device' > ld: drivers/vfio/pci/vfio_pci_core.o: in function `vfio_pci_core_disable': > /usr/src/linux/drivers/vfio/pci/vfio_pci_core.c:428: undefined reference to `vfio_pci_zdev_close_device' > ld: drivers/vfio/pci/vfio_pci_core.o: in function `vfio_pci_core_ioctl': > /usr/src/linux/drivers/vfio/pci/vfio_pci_core.c:712: undefined reference to `vfio_pci_info_zdev_add_caps' > > > 5) > CONFIG_KVM=m > CONFIG_VFIO_PCI_CORE=y > CONFIG_VFIO_PCI=y > CONFIG_VFIO_PCI_ZDEV_KVM=y > > This forces CONFIG_VFIO_PCI_ZDEV_KVM to 'm' and fails as above. > > > yes right I was really too stupid yesterday I think you are right and you should go as you proposed or use some pointer hook inside S390 to register with KVM. -- Pierre Morel IBM Lab Boeblingen