Re: [PATCH v5 12/18] x86/sgx: Add EPC OOM path to forcefully reclaim EPC

[Haitao Huang]

On Mon, 16 Oct 2023 16:09:52 -0500, Huang, Kai <kai.huang@xxxxxxxxx> wrote:
[...]

> still need to fix the bug mentioned above here.
>
> I really think you should just go this simple way:
>
> When you want to take EPC back from VM, kill the VM.

My only concern is that this is a compromise due to current limitation (no  
other sane way to take EPC from VMs). If we define this behavior and it  
becomes a contract to user space, then we can't change in future.

On the other hand, my understanding the reason you want this behavior is  
to enforce EPC limit at runtime. I just not sure how important it is and  
if it is a real usage given all limitations of SGX VMs we have (static EPC  
size, no migration).

Thanks

Haitao