On Wed, 2019-04-17 at 13:39 +0300, Jarkko Sakkinen wrote:

In order to provide a mechanism for devilering provisoning rights:

1. Add a new device file /dev/sgx/provision that works as a token for
   allowing an enclave to have the provisioning privileges.
2. Add a new ioctl called SGX_IOC_ENCLAVE_SET_ATTRIBUTE that accepts the
   following data structure:

   struct sgx_enclave_set_attribute {
           __u64 addr;
           __u64 attribute_fd;
   };

A daemon could sit on top of /dev/sgx/provision and send a file
descriptor of this file to a process that needs to be able to provision
enclaves.

The way this API is used is straight-forward. Lets assume that dev_fd is
a handle to /dev/sgx/enclave and prov_fd is a handle to
/dev/sgx/provision.  You would allow SGX_IOC_ENCLAVE_CREATE to
initialize an enclave with the PROVISIONKEY attribute by

params.addr = <enclave address>;
params.token_fd = prov_fd;

Should be params.attribute_fd = prov_fd;

Thanks,
-Kai