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Tue, 16 Jan 2024 22:32:02 GMT Received: from smtpav01.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B6EAD58072; Tue, 16 Jan 2024 22:32:02 +0000 (GMT) Received: from smtpav01.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4701C58079; Tue, 16 Jan 2024 22:32:01 +0000 (GMT) Received: from li-2311da4c-2e09-11b2-a85c-c003041e9174.ibm.com.com (unknown [9.61.163.245]) by smtpav01.wdc07v.mail.ibm.com (Postfix) with ESMTP; Tue, 16 Jan 2024 22:32:01 +0000 (GMT) From: Matthew Rosato To: qemu-s390x@nongnu.org Cc: farman@linux.ibm.com, thuth@redhat.com, clg@redhat.com, frankja@linux.ibm.com, pasic@linux.ibm.com, borntraeger@linux.ibm.com, richard.henderson@linaro.org, david@redhat.com, iii@linux.ibm.com, qemu-devel@nongnu.org Subject: [PATCH 2/3] s390x/pci: refresh fh before disabling aif Date: Tue, 16 Jan 2024 17:31:56 -0500 Message-ID: <20240116223157.73752-3-mjrosato@linux.ibm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240116223157.73752-1-mjrosato@linux.ibm.com> References: <20240116223157.73752-1-mjrosato@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: qVl_7EO2u-slSwwjlaSPiCj9SFG057-N X-Proofpoint-ORIG-GUID: ld8mhIUONVcSVB9lJNiWi-uSBfYUirOD X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-01-16_14,2024-01-16_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 priorityscore=1501 impostorscore=0 adultscore=0 phishscore=0 lowpriorityscore=0 suspectscore=0 mlxlogscore=847 clxscore=1015 mlxscore=0 spamscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2401160178 Received-SPF: pass client-ip=148.163.156.1; envelope-from=mjrosato@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Typically we refresh the host fh during CLP enable, however it's possible that the device goes through multiple reset events before the guest performs another CLP enable. Let's handle this for now by refreshing the host handle from vfio before disabling aif. Fixes: 03451953c7 ("s390x/pci: reset ISM passthrough devices on shutdown and system reset") Reported-by: Cédric Le Goater Signed-off-by: Matthew Rosato Reviewed-by: Eric Farman --- hw/s390x/s390-pci-kvm.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/hw/s390x/s390-pci-kvm.c b/hw/s390x/s390-pci-kvm.c index f7e10cfa72..9eef4fc3ec 100644 --- a/hw/s390x/s390-pci-kvm.c +++ b/hw/s390x/s390-pci-kvm.c @@ -18,6 +18,7 @@ #include "hw/s390x/s390-pci-bus.h" #include "hw/s390x/s390-pci-kvm.h" #include "hw/s390x/s390-pci-inst.h" +#include "hw/s390x/s390-pci-vfio.h" #include "cpu_models.h" bool s390_pci_kvm_interp_allowed(void) @@ -64,9 +65,17 @@ int s390_pci_kvm_aif_disable(S390PCIBusDevice *pbdev) return -EINVAL; } + /* + * The device may have already been reset but we still want to relinquish + * the guest ISC, so always be sure to use an up-to-date host fh. + */ + if (!s390_pci_get_host_fh(pbdev, &args.fh)) { + return -EPERM; + } + rc = kvm_vm_ioctl(kvm_state, KVM_S390_ZPCI_OP, &args); if (rc == 0) { - pbev->aif = false; + pbdev->aif = false; } return rc;