On Wed, Jan 06, 2021 at 02:55:19PM +1300, Kai Huang wrote: > From: Sean Christopherson <sean.j.christopherson@xxxxxxxxx> > > SGX virtualization requires to allocate "raw" EPC and use it as "virtual > EPC" for SGX guest. Unlike EPC used by SGX driver, virtual EPC doesn't > track how EPC pages are used in VM, e.g. (de)construction of enclaves, > so it cannot guarantee EREMOVE success, e.g. it doesn't have a priori > knowledge of which pages are SECS with non-zero child counts. > > Add SGX_CHILD_PRESENT for use by SGX virtualization to assert EREMOVE > failures are expected, but only due to SGX_CHILD_PRESENT. > > Signed-off-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx> > Signed-off-by: Kai Huang <kai.huang@xxxxxxxxx> Acked-by: Jarkko Sakkinen <jarkko@xxxxxxxxxx> /Jarkko
