x86/microcode: Provide new control functions

mainline inclusion
from mainline-v6.7-rc1
commit 6067788f04b1020b316344fe34746f96d594a042
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I8XRMW


CVE: NA

--------------------------------

The current all in one code is unreadable and really not suited for
adding future features like uniform loading with package or system
scope.

Provide a set of new control functions which split the handling of the
primary and secondary CPUs. These will replace the current rendezvous
all in one function in the next step. This is intentionally a separate
change because diff makes an complete unreadable mess otherwise.

So the flow separates the primary and the secondary CPUs into their own
functions which use the control field in the per CPU ucode_ctrl struct.

   primary()			secondary()
    wait_for_all()		 wait_for_all()
    apply_ucode()		 wait_for_release()
    release()			 apply_ucode()

Intel-SIG: commit 6067788f04b1 x86/microcode: Provide new control functions.
Microcode restructuring backport.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20231002115903.377922731@linutronix.de


[ Aubrey Li: amend commit log ]
Signed-off-by: Aubrey Li <aubrey.li@linux.intel.com>