Re: [PATCH v3 05/25] x86/sgx: Introduce virtual EPC for use by KVM guests

Borislav Petkov
2021-03-26T15:30:27Z

On Fri, Mar 26, 2021 at 08:17:38AM -0700, Dave Hansen wrote:
> We're working on a cgroup controller just for enclave pages that will
> apply to guest use and bare metal. It would have been nice to have up
> front, but we're trying to do things incrementally. A cgroup controller
> should solve he vast majority of these issues where users are quarreling
> about who gets enclave memory.

Maybe I'm missing something but why do you need a cgroup controller
instead of controlling that resource sharing in the sgx core? Or the
cgroup thing has additional functionality which is good to have anyway?

> BTW, we probably should have laid this out up front in the original
> merge, but the plans in order were roughly:
>
> 1. Core SGX functionality (merged into 5.11)
> 2. NUMA and KVM work
> 3. cgroup controller for enclave pages
> 4. EDMM support (lets you add/remove pages and change permissions while
> enclave runs. Current enclaves are stuck with the same memory they
> start with)

Oh yeah, that helps, thanks!

--
Regards/Gruss,
Boris.