On Wed, Aug 21, 2019 at 10:24:00AM -0700, Sean Christopherson wrote: > How does the current code not align with this approach? The core subsystem > should tear itself down if loading the driver fails, which includes failing > because it doesn't exist. I get now the real issue that you are trying to point out (did not earlier). Still, I think your approach to fix it needs some reconsideration. Something that *does not exist* can never fail. That should be dead obvious. If the SGX driver does not exit and KVM does not have SGX support compiled in, then the only logical conclusion that you can end up with is that neither the SGX core should exist in vmlinux in the first place. This all summarizes to that I have to remove the INTEL_SGX_DRIVER kconfig flag. Its existence can only be considered when there >= 2 in-kernel users for SGX. /Jarkko
