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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hello, KVM-PR (-enable-kvm) doesn't work anymore on our PA Semi Nemo boards [1] if we compiled it with new GCC compilers. The VM can't boot. There aren't any messages on the serial console of QEMU. It boots without KVM-PR. Kernel config with new GCC compiler [2]: - CONFIG_CC_VERSION_TEXT="powerpc64-suse-linux-gcc (SUSE Linux) 11.5.0" - CONFIG_TARGET_CPU="power4" - CONFIG_TUNE_CPU="-mtune=power10" It works if I compile it with an old GCC compiler [3]: - CONFIG_CC_VERSION_TEXT="powerpc-linux-gnu-gcc (Ubuntu 9.4.0-1ubuntu1~20.04.1) 9.4.0" - CONFIG_TARGET_CPU="power4" - CONFIG_TUNE_CPU="-mtune=power9" Mtune changes to power9 automatically if I compiled it with an old GCC compiler. If I compile it with a new GCC compiler again it changes automatically to mtune=power10. Is mtune the reason of the KVM-PR issue? I think the issue is the new GCC. [4] Could you please check whether KVM-PR is compatible with new versions of GCC compilers? Thanks in advance, Christian [1] https://en.wikipedia.org/wiki/AmigaOne_X1000 [2] https://github.com/chzigotzky/kernels/blob/45186997e6f347fd092f9ab629d62d6041426227/configs/x1000_defconfig [3] https://github.com/chzigotzky/kernels/blob/bc7a3e27b3fcdee52a8135435f02cf807a43872a/configs/x1000_defconfig [4] KVM-PR no longer works on an X1000 if the kernel has been compiled with a new GCC: https://forum.hyperion-entertainment.com/viewtopic.php?p=57146#p57146