1. Building the Keystone Security MonitorΒΆ
The security monitor (SM) is the core component of Keystone.
The SM is implemented on top of Berkeley Bootloader (bbl).
You can find the latest SM at https://github.com/keystone-enclave/riscv-pk (upstream bbl:
https://github.com/riscv/riscv-pk).
Most of the Keystone SM source code lives in sm
directory.
git clone https://github.com/keystone-enclave/riscv-pk
cd riscv-pk
If you have followed Quick Start, the build directory is
already created at hifive-work/riscv-pk
.
Otherwise, create a build directory.
mkdir build
cd build
Configure and build bbl
. The SM can be built by additional flags --enable-sm
and
--with-target-platform
at configuration.
../configure \
--enable-sm \
--with-target-platform=default \
--host=riscv64-unknown-linux-gnu \
--with-payload=<path to vmlinux>
make
This will generate the boot image bbl
in the build directory. Use it to boot the machine.
Now, we will customize the SM for a FU540 chip on HiFive Unleashed board. Currently, we only have one experimental platform configuration for FU540. If you wish to add your platform as a target, please submit a proposal to GitHub.