Re: [PATCH v29 00/20] Intel SGX foundations

[Jarkko Sakkinen]

On Thu, 2020-05-14 at 18:20 +0200, Borislav Petkov wrote:
> On Thu, May 14, 2020 at 09:15:59AM -0700, Sean Christopherson wrote:
> > I'm not opposed to adding a kernel param to disable SGX.  At one point
> > there was a proposal to extend clearcpuid to allow disabling multiple
> > feature bits, but it looks like that went the way of the dodo.
> > 
> > Note, such a param would disable SGX entirely, e.g. clear the feature bit
> > in /proc/cpuinfo and prevent any in-kernel SGX code from running.
> 
> It is a usual practice for big features like SGX to add a
> "nosgx" cmdline param to disable it in case something goes
> south. We do this for all features - see all "no*" switches in
> Documentation/admin-guide/kernel-parameters.txt

Uh oh, should probably address this. Should I send v31 today with a "nosgx"
patch added? Sorry for missing this one :-/

/Jarkko