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Bug
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Resolution: Unresolved
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Minor
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None
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rhel-9.6
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No
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Low
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rhel-sst-virtualization-hwe
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ssg_virtualization
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None
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QE ack
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False
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None
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Red Hat Enterprise Linux
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None
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None
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SanityOnly
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x86_64
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All
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None
What were you trying to do that didn't work?
The PF/VF can not be attached into the VM with shared memory but no hugepages-backend
Please provide the package NVR for which bug is seen:
host:
5.14.0-545.el9.x86_64
qemu-kvm-9.1.0-7.el9.x86_64
libvirt-10.10.0-3.el9.x86_64
How reproducible:
100%
Steps to reproduce
1.start a VM with shared memory but no hugepages-backend
# virt-install --machine=q35 --noreboot --name=rhel96 --cpu host-passthrough --memory=8196 --vcpus=4 --graphics type=vnc,port=5996,listen=0.0.0.0 --boot=uefi --network bridge=switch,model=virtio,mac=52:54:00:00:96:96 --import --noautoconsole --disk path=/home/images/RHEL96.qcow2,bus=virtio,cache=none,format=qcow2,io=threads,size=20 --osinfo detect=on,require=off --memorybacking access.mode=shared
# virsh start rhel96
2.hot-plug a PF/VF into the VM
# virsh attach-device rhel96 60\:00.0.xml error: Failed to attach device from 60:00.0.xml error: internal error: unable to execute QEMU command 'device_add': vfio 0000:60:00.0: failed to setup container for group 4: memory listener initialization failed: Region pc.ram: vfio_container_dma_map(0x562443f37680, 0x0, 0x30000, 0x7f7f3fbff000) = -14 (Bad address)
3. check the qemu-kvm log
# cat /var/log/libvirt/qemu/rhel96.log ... VFIO_MAP_DMA failed: Bad address VFIO_MAP_DMA failed: Bad address VFIO_MAP_DMA failed: Bad address VFIO_MAP_DMA failed: Bad address
Expected results
The PF/VF can be hot-plugged into VM without any error/warning
Actual results
The PF/VF can't be hot-plugged into VM
