x86/microcode: Default-disable late loading

stable inclusion
from stable-v5.10.173
commit e6230806681fa25b7a3829c021d5b33d68c9bd09
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I873BU
CVE: N/A
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=e6230806681fa25b7a3829c021d5b33d68c9bd09



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Intel-SIG: commit e6230806681f x86/microcode: Default-disable late loading.
Backport x86/microcode related patches from 5.10.173 upstream.

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[ Upstream commit a77a94f8 ]

It is dangerous and it should not be used anyway - there's a nice early
loading already.

Requested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20220525161232.14924-3-bp@alien8.de


Stable-dep-of: c0dd9245 ("x86/microcode: Check CPU capabilities after late microcode update correctly")
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Aichun Shi: amend commit log ]
Signed-off-by: Aichun Shi <aichun.shi@intel.com>