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@viggo.jf.intel.com...
/Jarkko