Re: [PATCH v1] x86: Pin cr4 FSGSBASE

[Peter Zijlstra]

On Tue, May 26, 2020 at 04:14:25PM -0700, Andi Kleen wrote:
> > And if this is going to be more permanent, we can separate the mask
> > (untested):
> 
> The FSGSBASE one should not be permanent, it will be replaced
> with the full FSGSBASE patches that set that bit correctly.

Well, even with full FSGSBASE patches on, that CR4 bit should never get
changed after boot.