On Tue, Jul 06, 2021 at 11:34:54AM -0700, Reinette Chatre wrote: > Hi Jarkko, > > On 7/5/2021 7:36 AM, Jarkko Sakkinen wrote: > > Create a heap for the test enclave, which has the same size as all > > available Enclave Page Cache (EPC) pages in the system. This will guarantee > > that all test_encl.elf pages *and* SGX Enclave Control Structure (SECS) > > have been swapped out by the page reclaimer during the load time. Actually, > > this adds a bit more stress than that since part of the EPC gets reserved > > for the Version Array (VA) pages. > > > > For each test, the page fault handler gets triggered in two occasions: > > > > - When SGX_IOC_ENCLAVE_INIT is performed, SECS gets swapped in by the > > page fault handler. > > - During the execution, each page that is referenced gets swapped in > > by the page fault handler. > > > > If I understand this correctly, all EPC pages are now being consumed during > fixture setup and thus every SGX test, no matter how big or small, now > becomes a stress test of the reclaimer instead of there being a unique > reclaimer test. Since an enclave is set up and torn down for every test this > seems like a significant addition. It also seems like this would impact > future tests of dynamic page addition where not all scenarios could be > tested with all EPC pages already consumed. > > Reinette Re-initializing the test enclave is mandatory thing to do for all tests because it has an internals state. /Jarkko
