On 11/4/21 8:04 AM, Jarkko Sakkinen wrote: >> Do we also need to deal with truncating the PCMD? (For those watching >> along at home, there are two things SGX swaps to RAM: the actual page >> data and also some metadata that ensures page integrity and helps >> prevent things like rolling back to old versions of swapped pages) > Yes. > > This can be achieved by iterating through all of the enclave pages, > which share the same shmem page for storing their PCMD's, as the one > being faulted back. If none of those pages is swapped, the PCMD page can > safely truncated. I was thinking we could just read the page. If it's all 0's, truncate it.
