nofsgsbase

History:        #0
Commit:         b745cfba44c152c34363eea9e052367b6b1d652b
Author:         Andy Lutomirski <luto@kernel.org>
Committer:      Thomas Gleixner <tglx@linutronix.de>
Author Date:    Fri 29 May 2020 04:13:58 AM CST
Committer Date: Thu 18 Jun 2020 09:47:05 PM CST

x86/cpu: Enable FSGSBASE on 64bit by default and add a chicken bit

Now that FSGSBASE is fully supported, remove unsafe_fsgsbase, enable
FSGSBASE by default, and add nofsgsbase to disable it.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Link: https://lkml.kernel.org/r/1557309753-24073-17-git-send-email-chang.seok.bae@intel.com
Link: https://lkml.kernel.org/r/20200528201402.1708239-13-sashal@kernel.org

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