当我在rocket-chip中尝试快速指令时，它卡住了。
之后git submodule update --init --recursive，没有更多的响应，只显示：
Submodule 'fsf-binutils-gdb' (git://sourceware.org/git/binutils-gdb.git) registered for path 'fsf-binutils-gdb'
Submodule 'riscv-gnu-toolchain' (https://github.com/riscv/riscv-gnu-toolchain.git) registered for path 'riscv-gnu-toolchain'
Submodule 'riscv-isa-sim' (https://github.com/riscv/riscv-isa-sim.git) registered for path 'riscv-isa-sim'
Submodule 'riscv-opcodes' (https://github.com/riscv/riscv-opcodes.git) registered for path 'riscv-opcodes'
Submodule 'riscv-openocd' (https://github.com/riscv/riscv-openocd.git) registered for path 'riscv-openocd'
Submodule 'riscv-pk' (https://github.com/riscv/riscv-pk.git) registered for path 'riscv-pk'
Submodule 'riscv-tests' (https://github.com/riscv/riscv-tests.git) registered for path 'riscv-tests'
Cloning into '/home/<username>/rocket-chip/rocket-tools/fsf-binutils-gdb'...
这是一个错误吗？或者我应该如何快速入门？
谢谢。
JL