Re: [PATCH v3 2/2] x86/sgx: Implement EUPDATESVN and opportunistically call it during first EPC page alloc

[Jarkko Sakkinen]

On Fri, 2025-05-02 at 07:22 +0000, Reshetova, Elena wrote:
> 
> > 
> > On Wed, Apr 30, 2025 at 06:53:32AM +0000, Reshetova, Elena wrote:
> > > 2. Switch to Sean's approach to execute EUPDATESVN during the
> > sgx_open().
> > > Btw, Sean do you agree that we don't gain much doing it second
> > > time during
> > > release() given the microcode flow?
> > > I would rather leave only one invocation of eupdatesvn during
> > sgx_inc_usage_count().
> > > 
> > > Proc: No new uABI. More predictable on svn change compared to
> > > option 1.
> > 
> > > Cons: Two explicit paths to hook: sgx_open() and sgx_vepc_open().
> > 
> > Why this is a con?
> 
> Well, just from the pov of not having a single path to enable. 
> Are you ok with option 2? 
> 

Yep, as SGX is anyway very much run-time managed feature and these
hooks fit better on how it is used.

> Best Regards,
> Elena.

BR, Jarkko