/dev/sgx-step would be uninstalled after os reboot

[xiaonan-INTC]

HW: NUC7JYJ
SW: Ubuntu Desktop 20.04

Reproducible steps:

1. install sgx-step following the wiki Building and Running - 0, 1, check by $ls /dev/sgx-step, OK
2. reboot os
3. check by $ls /dev/sgx-step again, NO

Is this normal?

[jovanbulck]

Yes, this is normal expected behavior. The make load target only loads the driver but does not "install" it to be auto-loaded on next reboot. This was a somewhat deliberate choice since /dev/sgx-step should only be used for experiment and not be used on a production machine as it exposes physical memory directly to user space and, hence, compromises system security altogether..

If you'd like, you can always install /dev/sgx-step across reboots, similar to how this is done in install_sgx_driver.sh. I'd also be happy to merge a PR for a similar make install target or so :)

[xiaonan-INTC]

Yes, this is normal expected behavior. The make load target only loads the driver but does not "install" it to be auto-loaded on next reboot. This was a somewhat deliberate choice since /dev/sgx-step should only be used for experiment and not be used on a production machine as it exposes physical memory directly to user space and, hence, compromises system security altogether..

If you'd like, you can always install /dev/sgx-step across reboots, similar to how this is done in install_sgx_driver.sh. I'd also be happy to merge a PR for a similar make install target or so :)

Thanks a lot jovanbulck, that's clear for me! From my point current realization is completely OK. :)