It's not possible to get more than one page fault on a single page on an EDMM system about linux-sgx-driver

[arai-fortanix]

After changing our code to make an mprotect(PROT_NONE) call on the addresses that we want to continue to fault, the driver no longer commits the page, and we are able to receive multiple page faults on the same page. So this was user error.

For anyone else who encounters the same issue: if the pages have PROT_READ | PROT_WRITE protections, but are not present in the enclave, the driver will automatically attempt to add a page to the enclave when the enclave induces a fault on one of these pages. If the page protection is PROT_NONE, the driver will not attempt to add a page to the enclave, and instead will just deliver the SIGBUS or SIGSEGV to the appplication.