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

[Borislav Petkov]

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

Thx.

-- 
Regards/Gruss,
    Boris.

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