set ITR to rhel840 and ITM16 according to discussion with basil in mail. 
thanks

Hi Dehan,

Scratch build with changes:
https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=35146591
can this build be verified ?

Thanks in advance,
Basil

(In reply to Basil Salman from comment #6)
> Hi Dehan,
> 
> Scratch build with changes:
> https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=35146591
> can this build be verified ?
> 
> Thanks in advance,
> Basil

Hi Basil,
Okay, sure, Will use this new build to check and update result asap. thanks for your effort, Basil.

BR
Dehan

Build that resolves this bug:
https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=35297151

Since related issues have been verified and resolved, this bug is directly regarded as verified.

Hit a new issue out, that it might be a serious problem after I contacted with Basil. 
These two commands "guest-fstrim" and "guest-exec" have the same problem as following.
step to reproduce :
1. bootup guest with:
/usr/libexec/qemu-kvm \
    -name 'avocado-vt-vm1'  \
    -sandbox on  \
    -machine q35 \
    -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 \
    -monitor stdio \
    -m 4096  \
    -device virtio-vga,id=video0 \
    -smp 24,maxcpus=24,cores=12,threads=1,dies=1,sockets=2  \
    -cpu 'Skylake-Server',hv_stimer,hv_synic,hv_vpindex,hv_relaxed,hv_spinlocks=0xfff,hv_vapic,hv_time,hv_frequencies,hv_runtime,hv_tlbflush,hv_reenlightenment,hv_stimer_direct,hv_ipi,+kvm_pv_unhalt \
    -chardev socket,path=/tmp/avocado_adfijf889/monitor-qmpmonitor1-20210105-032815-BLpNoZnG,id=qmp_id_qmpmonitor1,nowait,server  \
    -mon chardev=qmp_id_qmpmonitor1,mode=control \
    -chardev socket,path=/tmp/avocado_adfijf889/monitor-catch_monitor-20210105-032815-BLpNoZnG,id=qmp_id_catch_monitor,nowait,server  \
    -mon chardev=qmp_id_catch_monitor,mode=control \
    -device pvpanic,ioport=0x505,id=idXAAXfN \
    -chardev socket,path=/tmp/avocado_adfijf889/serial-serial0-20210105-032815-BLpNoZnG,id=chardev_serial0,nowait,server \
    -device isa-serial,id=serial0,chardev=chardev_serial0 \
    -chardev socket,path=/tmp/avocado_adfijf889/serial-org.qemu.guest_agent.0-20210105-032815-BLpNoZnG,id=chardev_org.qemu.guest_agent.0,nowait,server \
    -device pcie-root-port,id=pcie-root-port-1,port=0x1,addr=0x1.0x1,bus=pcie.0,chassis=2 \
    -device virtio-serial-pci,id=virtio_serial_pci0,bus=pcie-root-port-1,addr=0x0 \
    -device virtserialport,id=org.qemu.guest_agent.0,name=org.qemu.guest_agent.0,chardev=chardev_org.qemu.guest_agent.0,bus=virtio_serial_pci0.0,nr=1  \
    -chardev socket,id=seabioslog_id_20210105-032815-BLpNoZnG,path=/tmp/avocado_adfijf889/seabios-20210105-032815-BLpNoZnG,server,nowait \
    -device isa-debugcon,chardev=seabioslog_id_20210105-032815-BLpNoZnG,iobase=0x402 \
    -device pcie-root-port,id=pcie-root-port-2,port=0x2,addr=0x1.0x2,bus=pcie.0,chassis=3 \
    -device qemu-xhci,id=usb1,bus=pcie-root-port-2,addr=0x0 \
    -device usb-tablet,id=usb-tablet1,bus=usb1.0,port=1 \
    -device pcie-root-port,id=pcie-root-port-3,port=0x3,addr=0x1.0x3,bus=pcie.0,chassis=4 \
    -device virtio-scsi-pci,id=virtio_scsi_pci0,bus=pcie-root-port-3,addr=0x0 \
    -blockdev node-name=file_image1,driver=file,auto-read-only=on,discard=unmap,aio=threads,filename=win10-64-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 \
    -blockdev node-name=file_image2,driver=file,auto-read-only=on,discard=unmap,aio=threads,filename=data.qcow2,cache.direct=on,cache.no-flush=off \
    -blockdev node-name=drive_image2,driver=qcow2,read-only=off,cache.direct=on,cache.no-flush=off,file=file_image2 \
    -device scsi-hd,id=image2,drive=drive_image2,write-cache=on \
    -device pcie-root-port,id=pcie-root-port-4,port=0x4,addr=0x1.0x4,bus=pcie.0,chassis=5 \
    -device virtio-net-pci,mac=9a:53:3e:06:b0:47,id=idKpQvyY,netdev=idpFCo1s,bus=pcie-root-port-4,addr=0x0  \
    -netdev tap,id=idpFCo1s,vhost=on \
    -blockdev node-name=file_cd1,driver=file,auto-read-only=on,discard=unmap,aio=threads,filename=/home/kvm_autotest_root/iso/windows/winutils.iso,cache.direct=on,cache.no-flush=off \
    -blockdev node-name=drive_cd1,driver=raw,read-only=on,cache.direct=on,cache.no-flush=off,file=file_cd1 \
    -device scsi-cd,id=cd1,drive=drive_cd1,write-cache=on \
    -blockdev node-name=file_virtio,driver=file,auto-read-only=on,discard=unmap,aio=threads,filename=/home/kvm_autotest_root/iso/windows/virtio-win-prewhql-0.1-196.iso,cache.direct=on,cache.no-flush=off \
    -blockdev node-name=drive_virtio,driver=raw,read-only=on,cache.direct=on,cache.no-flush=off,file=file_virtio \
    -device scsi-cd,id=virtio,drive=drive_virtio,write-cache=on  \
    -blockdev node-name=file_virtio2,driver=file,auto-read-only=on,discard=unmap,aio=threads,filename=/home/kvm_autotest_root/iso/windows/virtio-win-prewhql-0.1-195.iso,cache.direct=on,cache.no-flush=off \
    -blockdev node-name=drive_virtio2,driver=raw,read-only=on,cache.direct=on,cache.no-flush=off,file=file_virtio2 \
    -device scsi-cd,id=virtio2,drive=drive_virtio2,write-cache=on  \
    -device pcie-root-port,id=pcie-root-port-5,port=0x5,addr=0x1.0x5,bus=pcie.0,chassis=6 \
-device virtio-gpu-pci,id=video1,bus=pcie-root-port-5,addr=0x0 \
    -device pcie-root-port,id=pcie-root-port-6,port=0x6,addr=0x1.0x6,bus=pcie.0,chassis=7 \
-device virtio-gpu-pci,id=video2,bus=pcie-root-port-6,addr=0x0 \
    -vnc :8  \
    -rtc base=localtime,clock=host,driftfix=slew  \
    -boot menu=off,order=cdn,once=c,strict=off \
    -enable-kvm \
2. connect guest via qga and send commands:
[root@dell-per440-03 verify_bz_rebase]# nc -U /tmp/avocado_adfijf889/serial-org.qemu.guest_agent.0-20210105-032815-BLpNoZnG
{"execute":"guest-ping"}
{"return": {}}

How reproduce:
100%

pkgs:
qemu-kvm-block-curl-5.2.0-8.module+el8.4.0+10093+e085f1eb.x86_64
kernel-4.18.0-291.el8.x86_64
seabios-1.14.0-1.module+el8.4.0+8855+a9e237a9.x86_64
qemu-guest-agent-5.2.0-8.module+el8.4.0+10093+e085f1eb.x86_64
qemu-ga-win-102.0.0-1.el8.noarch.rpm

Actual result:
{"execute":"guest-fstrim"}	
{"return": {"paths": [{"path": "C:\\", "error": "Failed to read from child pipe (EOF)"}, {"path": "D:\\", "error": "Failed to read from child pipe (EOF)"}, {"path": "S:\\", "error": "Failed to read from child pipe (EOF)"}]}}
{"execute": "guest-exec", "arguments": {"path": "PING", "arg": [ "www.redhat.com" ],"capture-output": true}}
{"error": {"class": "GenericError", "desc": "Guest agent command failed, error was 'Failed to read from child pipe (EOF)'"}

Expected result:
{"execute":"guest-fstrim"}
{"return": {"paths": [{"path": "C:\\"}, {"path": "D:\\"}, {"path": "S:\\"}]}}
{"execute": "guest-exec", "arguments": {"path": "PING", "arg": [ "www.redhat.com" ],"capture-output": true}}
{"return": {"pid": 3044}}

Addition info:
previous version of qemu-ga-win didn't hit this issue.

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 (virtio-win bug fix and enhancement update), 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/RHEA-2021:1959