reproduce (this is a W=1 build):
        git checkout 6146a0f1dfae5d37442a9ddcba012add260bceb0
        b4 shazam https://lore.kernel.org/r/20251108140305.1120117-4-hans.zhang@cixtech.com

        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 olddefconfig
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash arch/x86/kvm/ drivers/pci/controller/cadence/