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QEMU system emulation hung in WHPX SMP boot

Host environment

  • Operating system: Windows 11 25H2
  • OS/kernel version: OS Build 26200.6901
  • Architecture: x86_64
  • QEMU flavor: qemy-system-x86_64, qemu-system-i386
  • QEMU version: master, 10.1.2, 10.0.6
  • QEMU command line: 
    ./qemu-system-i386 -nodefaults -M pc,accel=whpx,kernel-irqchip=off -device VGA -smp cores=2

Emulated/Virtualized environment

  • Operating system: N/A
  • OS/kernel version: N/A

Description of problem

QEMU system emulation hung, no SeaBIOS POST, not responding to input and must be forcefully terminated.

Steps to reproduce

./qemu-system-i386 -nodefaults -M pc,accel=whpx,kernel-irqchip=off -device VGA -smp cores=2

Additional information

Bisected to df32e5c5

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