Bug 1482856
| Summary: | Unable to start vhost if iommu_platform=on but intel_iommu=on not specified in guest [rhel-7.4.z] | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Oneata Mircea Teodor <toneata> |
| Component: | qemu-kvm-rhev | Assignee: | Peter Xu <peterx> |
| Status: | CLOSED ERRATA | QA Contact: | xiywang |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | 7.5 | CC: | chayang, hhuang, jasowang, juzhang, knoel, michen, mtessun, peterx, pezhang, qzhang, virt-maint, xiywang |
| Target Milestone: | rc | Keywords: | ZStream |
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | qemu-kvm-rhev-2.9.0-16.el7_4.5 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | 1476121 | Environment: | |
| Last Closed: | 2017-09-05 11:52:57 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 1476121 | ||
| Bug Blocks: | |||
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Description
Oneata Mircea Teodor
2017-08-18 08:38:47 UTC
Fix included in qemu-kvm-rhev-2.9.0-16.el7_4.5 Before fix included: qemu-kvm-rhev-2.9.0-14.el7.x86_64 # /usr/libexec/qemu-kvm \ -name 'virt-tests-vm2' -sandbox off -machine q35,kernel-irqchip=split -vga std \ -drive id=drive_image1,if=none,snapshot=on,aio=threads,cache=none,format=qcow2,file=/home/kvm_autotest_root/images/rhel74-64-virtio.qcow2 -device virtio-blk-pci,id=image1,drive=drive_image1 \ -device intel-iommu,intremap=on,device-iotlb=on -device ioh3420,id=pcie.1,chassis=1 \ -device virtio-net-pci,mac=9a:86:87:88:89:8a,id=idRB0WNk,vectors=4,netdev=idb3O1YX,disable-legacy=on,disable-modern=off,iommu_platform=on,ats=on -netdev tap,id=idb3O1YX,vhost=on,script=/etc/ovs-ifup,downscript=/etc/ovs-ifdown,vhostforce \ -m 8192 -smp 8 -cpu 'Haswell-noTSX',+kvm_pv_unhalt,hv_spinlocks=0x1fff,hv_vapic,hv_time \ -vnc :1 -rtc base=localtime,clock=host,driftfix=slew -enable-kvm -monitor stdio QEMU 2.9.0 monitor - type 'help' for more information (qemu) qemu-kvm: unable to start vhost net: 14: falling back on userspace virtio After fix included: # rpm -qa | grep qemu-kvm-rhev qemu-kvm-rhev-2.9.0-16.el7_4.5.x86_64 Use the same qemu command as above to boot the guest, 'qemu-kvm: unable to start vhost net: 14: falling back on userspace virtio' does not appear again. Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2017:2628 |