On Tue, 2020-05-12 at 19:55 +0800, Hui, Chunyang wrote: > On Wed, Apr 22, 2020 at 12:52:56AM +0300, Jarkko Sakkinen wrote: > > Intel(R) SGX is a set of CPU instructions that can be used by applications > > to set aside private regions of code and data. The code outside the enclave > > is disallowed to access the memory inside the enclave by the CPU access > > control. > > > > There is a new hardware unit in the processor called Memory Encryption > > Engine (MEE) starting from the Skylake microacrhitecture. BIOS can define > > one or many MEE regions that can hold enclave data by configuring them with > > PRMRR registers. > > > > The MEE automatically encrypts the data leaving the processor package to > > the MEE regions. The data is encrypted using a random key whose life-time > > is exactly one power cycle. > > > > The current implementation requires that the firmware sets > > IA32_SGXLEPUBKEYHASH* MSRs as writable so that ultimately the kernel can > > decide what enclaves it wants run. The implementation does not create > > any bottlenecks to support read-only MSRs later on. > > > > You can tell if your CPU supports SGX by looking into /proc/cpuinfo: > > > > cat /proc/cpuinfo | grep sgx > > Tested-by: Chunyang Hui <sanqian.hcy@xxxxxxxxxx> > > Occlum project (https://github.com/occlum/occlum) is a libOS built on top of > Intel SGX feature. We ran Occlum tests using patch v29 on SGX hardware with > the Flexible Launch Control (FLC) feature and didn't find any problems. > As Occlum core developers, we would like these patches to be merged soon. Great, thanks adding tested by to the driver and reclaimer patch. /Jarkko
