FYI, we noticed the following commit: commit: b1e12fcfad6aec57224ac69a0afa2f254beaa8b4 ("x86/mm: Allow to boot without la57 if CONFIG_X86_5LEVEL=y") https://git.kernel.org/cgit/linux/kernel/git/kas/linux.git la57/integration in testcase: perf-sanity-tests with following parameters: on test machine: qemu-system-x86_64 -enable-kvm -cpu kvm64,+ssse3 -smp 2 -m 8G caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): [ 102.810791] Warning: Kernel ABI header at 'tools/arch/x86/include/asm/required-features.h' differs from latest version at 'arch/x86/include/asm/required-features.h' To reproduce: git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email Thanks, Xiaolong