支持可信启动链，支持TPM/TCM。在GRUB的stage1, stage1.5, stage2对关键加载数据进行扫描，并记录到TPM/TCM芯片中。需要BIOS提供0x1A中断实现。-supports trusted booting, support TPM/TCM。This software measures key data in stage1, stage1.5, stage2, and record into TPM/TCM chip. needs 0x1A interrupt fun