Re: [PATCH v15 23/23] x86/sgx: Driver documentation

[Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>]

On Tue, Nov 06, 2018 at 07:49:11AM +0200, Jarkko Sakkinen wrote:
> On Mon, Nov 05, 2018 at 12:27:11PM -0800, Dave Hansen wrote:
> > The ABI seems entirely undocumented and rather lightly designed, which
> > seems like something we should fix before this is merged.
> 
> ABI is documented in arch/x86/include/uapi/asm/sgx.h that from which the
> documentation is included to intel_sgx.rst. I'm not saying that there is
> no space refine it but it is neither undocumented.
> 
> > Also, for a feature as massive and complicated as this one, it seems
> > irresponsible to not have a selftest.  Is that not feasible for some reason?
> 
> I do have the in-kernel launch enclave stuff backed up here:
> 
> https://github.com/jsakkine-intel/sgx-le-host
> https://github.com/jsakkine-intel/sgx-le
> 
> This is about as simple as it gets without any type of run-time.

Of course the enclave could be simplified considerably since now it has
full code for EINITTOKEN generation, which is probably an overkill for a
selftest.

It could be simple as just enter and return to and from enclave or
something in-between in terms of complexity.

Even for the simplest enclave you need a signing tool (see sgxsign.c in
my sgx-le repository), a custom linker script and a sophisticated
makefile.

/Jarkko