On Thu, Apr 29, 2021 at 12:39:51PM -0600, Tim Gardner wrote: > I'm just starting my learning curve on SGX, so I don't know if I've missed > some setup for the SGX device entries. After looking at arch/x86/kernel/cpu/sgx/driver.c > I see that there is no mode value for either sgx_dev_enclave or sgx_dev_provision. Take a look at https://github.com/systemd/systemd/pull/18944 > With this patch I can get the SGX self test to complete: > > sudo ./test_sgx > Warning: no execute permissions on device file /dev/sgx_enclave > 0x0000000000000000 0x0000000000002000 0x03 > 0x0000000000002000 0x0000000000001000 0x05 > 0x0000000000003000 0x0000000000003000 0x03 > SUCCESS > > Is the warning even necessary ? > > Tim With a quick look, I think that check is too strict. AFAIK, mmap(PROT_EXEC) can be done, as long as the file is not in a noexec FS. Dave? For reference: https://lore.kernel.org/linux-sgx/20210318194301.11D9A984@xxxxxxxxxxxxxxxxxx/ /Jarkko
