could not hot-remove disabled NIC from Win2012 guest by 'devel_del id1'

[Amos Jianjun Kong]

# qemu-latest-upstream -mon chardev=qmp,mode=control,pretty=on \
 -chardev socket,id=qmp,host=localhost,port=1234,server,nowait -vnc :0 \
 -monitor stdio /images/win2012-64-virtio.qcow2 \
 -device virtio-net-pci,netdev=ndev1,id=id1 -netdev tap,id=ndev1 \
 -device e1000,netdev=ndev2,id=id2 -netdev tap,id=ndev2 \
 -device rtl8139,netdev=ndev3,id=id3 -netdev tap,id=ndev3 \
 -smp 4 -m 3000 -usbdevice tablet

If disable nic in guest's "Network Connections" panel, nic could not be hot-removed through qemu monitor.

1) if disable nic in guest
(qemu) devel_del id1 (nic still in "Network Connections". if enable nic, nic can work)
(qemu) devel_del id1
(qemu) devel_del id1

2) if enable nic in guest
(qemu) devel_del id1 (nic will be removed, disappear from "Network Connections")
(qemu) devel_del id1
Device 'id1' not found

Could not reproduced this problem with all linux guests & other Windows guests
Problem exists with virtio-nic/e1000/rtl8139, it seems the problem of pci-hotplug in piix4.

Could not reproduce this problem with Vmware + win2012 guest.

[Amos Jianjun Kong (amoskong)]

hot-remove a disabled nic:

(qemu) device_del id1
 irq: -120008472, level :1, pmsts: 1
acpi_pm_tmr_update: bool :0
(qemu) gpe read 0 == 2
 irq: -120008472, level :1, pmsts: 0
acpi_pm_tmr_update: bool :0
 irq: -120008472, level :0, pmsts: 0
acpi_pm_tmr_update: bool :0
gpe write 2 <== 0
 irq: -120008472, level :0, pmsts: 0
acpi_pm_tmr_update: bool :0
gpe write 3 <== 0
 irq: -120008472, level :0, pmsts: 0
acpi_pm_tmr_update: bool :0
gpe read 0 == 2
 irq: -120008472, level :0, pmsts: 0
acpi_pm_tmr_update: bool :0
gpe write 0 <== 2
gpe read 1 == 0
 irq: -120008472, level :0, pmsts: 0
acpi_pm_tmr_update: bool :0
 irq: -120008472, level :0, pmsts: 0
acpi_pm_tmr_update: bool :0
gpe write 2 <== 253
 irq: -120008472, level :0, pmsts: 0
acpi_pm_tmr_update: bool :0
gpe write 3 <== 255
pci_up_read 38
pci_down_read 8
...
...
pci_up_read 38
pci_down_read 8
 irq: -120008472, level :0, pmsts: 0
acpi_pm_tmr_update: bool :0
gpe write 2 <== 255
 irq: -120008472, level :0, pmsts: 0
acpi_pm_tmr_update: bool :0
gpe write 3 <== 255

[Amos Jianjun Kong (amoskong)]

hot-remove an enabled nic:

(qemu) device_del id1
 irq: -120008472, level :1, pmsts: 1
acpi_pm_tmr_update: bool :0
(qemu) gpe read 0 == 2
 irq: -120008472, level :1, pmsts: 0
acpi_pm_tmr_update: bool :0
 irq: -120008472, level :0, pmsts: 0
acpi_pm_tmr_update: bool :0
gpe write 2 <== 0
 irq: -120008472, level :0, pmsts: 0
acpi_pm_tmr_update: bool :0
gpe write 3 <== 0
 irq: -120008472, level :0, pmsts: 0
acpi_pm_tmr_update: bool :0
gpe read 0 == 2
 irq: -120008472, level :0, pmsts: 0
acpi_pm_tmr_update: bool :0
gpe write 0 <== 2
gpe read 1 == 0
 irq: -120008472, level :0, pmsts: 0
acpi_pm_tmr_update: bool :0
 irq: -120008472, level :0, pmsts: 0
acpi_pm_tmr_update: bool :0
gpe write 2 <== 253
 irq: -120008472, level :0, pmsts: 0
acpi_pm_tmr_update: bool :0
gpe write 3 <== 255
pci_up_read 38
pci_down_read 8
....
....
pci_up_read 38
pci_down_read 8
 irq: -120008472, level :0, pmsts: 0
acpi_pm_tmr_update: bool :0
gpe write 2 <== 255
 irq: -120008472, level :0, pmsts: 0
acpi_pm_tmr_update: bool :0
gpe write 3 <== 255
 irq: -120008472, level :0, pmsts: 0
acpi_pm_tmr_update: bool :0
gpe write 2 <== 255
 irq: -120008472, level :0, pmsts: 0
acpi_pm_tmr_update: bool :0
gpe write 3 <== 255
pciej write 8 <== 8
 irq: -120008472, level :0, pmsts: 0
acpi_pm_tmr_update: bool :0
gpe write 2 <== 255
 irq: -120008472, level :0, pmsts: 0
acpi_pm_tmr_update: bool :0
gpe write 3 <== 255

[Thomas Huth (th-huth)]

Triaging old bug tickets... can you still reproduce this issue with the latest version of QEMU? Or could we close this ticket nowadays?

[Launchpad Janitor (janitor)]

[Expired for QEMU because there has been no activity for 60 days.]