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Tue, 16 Jan 2024 22:32:01 GMT Received: from smtpav01.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1ADF758076; Tue, 16 Jan 2024 22:32:01 +0000 (GMT) Received: from smtpav01.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B13BD58068; Tue, 16 Jan 2024 22:31:59 +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 22:31:59 +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 1/3] s390x/pci: avoid double enable/disable of aif Date: Tue, 16 Jan 2024 17:31:55 -0500 Message-ID: <20240116223157.73752-2-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-ORIG-GUID: 8-8RKcYJ8sKNe8keY-ALbSLQD3b8UzKv X-Proofpoint-GUID: 65YFjJrhkg187MG-qrb5NFRRzkv0V3ka 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 suspectscore=0 lowpriorityscore=0 mlxlogscore=822 malwarescore=0 clxscore=1015 spamscore=0 phishscore=0 priorityscore=1501 impostorscore=0 mlxscore=0 adultscore=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 Use a flag to keep track of whether AIF is currently enabled. This can be used to avoid enabling/disabling AIF multiple times as well as to determine whether or not it should be disabled during reset processing. Fixes: d0bc7091c2 ("s390x/pci: enable adapter event notification for interpreted devices") Reported-by: Cédric Le Goater Signed-off-by: Matthew Rosato Reviewed-by: Eric Farman --- hw/s390x/s390-pci-kvm.c | 25 +++++++++++++++++++++++-- include/hw/s390x/s390-pci-bus.h | 1 + 2 files changed, 24 insertions(+), 2 deletions(-) diff --git a/hw/s390x/s390-pci-kvm.c b/hw/s390x/s390-pci-kvm.c index ff41e4106d..f7e10cfa72 100644 --- a/hw/s390x/s390-pci-kvm.c +++ b/hw/s390x/s390-pci-kvm.c @@ -27,6 +27,7 @@ bool s390_pci_kvm_interp_allowed(void) int s390_pci_kvm_aif_enable(S390PCIBusDevice *pbdev, ZpciFib *fib, bool assist) { + int rc; struct kvm_s390_zpci_op args = { .fh = pbdev->fh, .op = KVM_S390_ZPCIOP_REG_AEN, @@ -38,15 +39,35 @@ int s390_pci_kvm_aif_enable(S390PCIBusDevice *pbdev, ZpciFib *fib, bool assist) .u.reg_aen.flags = (assist) ? 0 : KVM_S390_ZPCIOP_REGAEN_HOST }; - return kvm_vm_ioctl(kvm_state, KVM_S390_ZPCI_OP, &args); + if (pbdev->aif) { + return -EINVAL; + } + + rc = kvm_vm_ioctl(kvm_state, KVM_S390_ZPCI_OP, &args); + if (rc == 0) { + pbdev->aif = true; + } + + return rc; } int s390_pci_kvm_aif_disable(S390PCIBusDevice *pbdev) { + int rc; + struct kvm_s390_zpci_op args = { .fh = pbdev->fh, .op = KVM_S390_ZPCIOP_DEREG_AEN }; - return kvm_vm_ioctl(kvm_state, KVM_S390_ZPCI_OP, &args); + if (!pbdev->aif) { + return -EINVAL; + } + + rc = kvm_vm_ioctl(kvm_state, KVM_S390_ZPCI_OP, &args); + if (rc == 0) { + pbev->aif = false; + } + + return rc; } diff --git a/include/hw/s390x/s390-pci-bus.h b/include/hw/s390x/s390-pci-bus.h index b1bdbeaeb5..435e788867 100644 --- a/include/hw/s390x/s390-pci-bus.h +++ b/include/hw/s390x/s390-pci-bus.h @@ -361,6 +361,7 @@ struct S390PCIBusDevice { bool unplug_requested; bool interp; bool forwarding_assist; + bool aif; QTAILQ_ENTRY(S390PCIBusDevice) link; };