Bug 2135692

Description of problem:
The RHEL guest failed on booting if enable iommu like as

-device intel-iommu,intremap=on,device-iotlb=on \
-device virtio-scsi-pci,id=virtio_scsi_pci0,bus=pcie-root-port-2,addr=0x0,disable-legacy=on,disable-modern=off,iommu_platform=on,ats=on \


 

Version-Release number of selected component (if applicable):
Red Hat Enterprise Linux release 9.2 Beta (Plow)
5.14.0-162.el9.x86_64
qemu-kvm-7.1.0-1.el9.x86_64
seabios-bin-1.16.0-4.el9.noarch
edk2-ovmf-20220526git16779ede2d36-3.el9.noarch
libvirt-8.5.0-6.el9.x86_64
python3-libvirt-8.5.0-2.el9.x86_64
virtio-win-prewhql-0.1-227.iso


How reproducible:
100%

Steps to Reproduce:
1. Boot VM with iommu enabled

/usr/libexec/qemu-kvm \
     -name 'avocado-vt-vm1'  \
     -sandbox on  \
     -machine q35,kernel-irqchip=split,memory-backend=mem-machine_mem \
     -device pcie-root-port,id=pcie-root-port-0,multifunction=on,bus=pcie.0,addr=0x1,chassis=1 \
     -device pcie-pci-bridge,id=pcie-pci-bridge-0,addr=0x0,bus=pcie-root-port-0  \
     -nodefaults \
     -device intel-iommu,intremap=on,device-iotlb=on \
     -device VGA,bus=pcie.0,addr=0x2 \
     -m 8G \
     -object memory-backend-ram,size=8G,id=mem-machine_mem  \
     -smp 10,maxcpus=10,cores=5,threads=1,dies=1,sockets=2  \
     -cpu 'Cascadelake-Server',ss=on,vmx=on,pdcm=on,hypervisor=on,tsc-adjust=on,umip=on,pku=on,md-clear=on,stibp=on,arch-capabilities=on,xsaves=on,ibpb=on,ibrs=on,amd-stibp=on,amd-ssbd=on,rdctl-no=on,ibrs-all=on,skip-l1dfl-vmentry=on,mds-no=on,pschange-mc-no=on,tsx-ctrl=on,hle=off,rtm=off,kvm_pv_unhalt=on \
     -device pcie-root-port,id=pcie-root-port-1,port=0x1,addr=0x1.0x1,bus=pcie.0,chassis=2 \
     -device qemu-xhci,id=usb1,bus=pcie-root-port-1,addr=0x0 \
     -device usb-tablet,id=usb-tablet1,bus=usb1.0,port=1 \
     -device pcie-root-port,id=pcie-root-port-2,port=0x2,addr=0x1.0x2,bus=pcie.0,chassis=3 \
     -device virtio-scsi-pci,id=virtio_scsi_pci0,bus=pcie-root-port-2,addr=0x0,disable-legacy=on,disable-modern=off,iommu_platform=on,ats=on \
     -blockdev node-name=file_image1,driver=file,auto-read-only=on,discard=unmap,aio=threads,filename=/home/kvm_autotest_root/images/rhel910-64-virtio-scsi.qcow2,cache.direct=on,cache.no-flush=off \
     -blockdev node-name=drive_image1,driver=qcow2,read-only=off,cache.direct=on,cache.no-flush=off,file=file_image1 \
     -device scsi-hd,id=image1,drive=drive_image1,write-cache=on \
     \
     -device pcie-root-port,id=pcie-root-port-3,port=0x3,addr=0x1.0x3,bus=pcie.0,chassis=4 \
     \
     -vnc :5 \
     -monitor stdio \
     -rtc base=utc,clock=host,driftfix=slew  \
     -boot menu=off,order=cdn,once=c,strict=off \
     -enable-kvm \
     -device pcie-root-port,id=pcie_extra_root_port_0,multifunction=on,bus=pcie.0,addr=0x3,chassis=5

2.
3.

Actual results:
Boot failed,system hang.

Expected results:
Boot succeed 

Additional info:

Same CML may boot succeed on 

qemu-kvm-7.0.0-13.el9.x86_64
qemu-kvm-6.2.0-20.module+el8.8.0+16744+d3c7858f.x86_64