linux-kernel - Re: [PATCH v12 00/18] Enable FSGSBASE instructions

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Message-ID: <20200515175550.GP3538@tassilo.jf.intel.com>
Date:   Fri, 15 May 2020 10:55:50 -0700
From:   Andi Kleen <ak@...ux.intel.com>
To:     Sasha Levin <sashal@...nel.org>
Cc:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
        linux-kernel@...r.kernel.org, tglx@...utronix.de, bp@...en8.de,
        luto@...nel.org, hpa@...or.com, dave.hansen@...el.com,
        tony.luck@...el.com, ravi.v.shankar@...el.com,
        chang.seok.bae@...el.com
Subject: Re: [PATCH v12 00/18] Enable FSGSBASE instructions

> Indeed, we've seen a few hacks that basically just enable FSGSBASE:
> 
> - https://github.com/oscarlab/graphene-sgx-driver
> - https://github.com/occlum/enable_rdfsbase
> 
> And would very much like to get rid of them...

These are insecure and open root holes without the patches
used here.

-Andi