test-runner: Use host CPU when starting VM When running test-runner on Ubuntu 24.04 with mainline kernel compiled from Ubuntu default configuration with applied tester.config options, the QEMU is not able to start the test-runner application due to illegal instruction. Passing '-cpu host' fixes that issue. > $ tools/test-runner -k linux/arch/x86/boot/bzImage -- tools/mgmt-tester > Using QEMU binary /usr/bin/qemu-system-x86_64 > Using kernel image [...]/linux/arch/x86/boot/bzImage > Found support for Virtual Machine eXtensions > [...] > [ 0.000000] Linux version 6.14.0-rc2+ (gcc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0 [...] > [...] > Running command tools/mgmt-tester > New process 74 created > Illegal instruction > Process 74 exited with status 132 > [ 0.881239] reboot: Restarting system > [ 0.881431] reboot: machine restart Potential caveat: In case when the KVM is not available on the host, the QEMU will not start with the warning: CPU model 'host' requires KVM or HVF

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