reproduce (this is a W=1 build):
        # https://github.com/yiliu1765/iommufd/commit/ad4c2a1ad5ea4662bb7b1a8b2839ca4eca59a05f
        git remote add yiliu1765-iommufd https://github.com/yiliu1765/iommufd.git
        git fetch --no-tags yiliu1765-iommufd wip/iommufd_pasid-20240626
        git checkout ad4c2a1ad5ea4662bb7b1a8b2839ca4eca59a05f
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/iommu/intel/