[coreboot-gerrit] Change in coreboot[master]: cpu/x86/mpinit: Serialize microcode updates for HT threads

[Patrick Rudolph (Code Review)]

Hello build bot (Jenkins),

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/44904

to look at the new patch set (#8).

Change subject: cpu/x86/mpinit: Serialize microcode updates for HT threads
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cpu/x86/mpinit: Serialize microcode updates for HT threads

This change affects Intel CPUs only. As most platforms are doing
uCOde update using FIT, they aren't affect by this code either.

Update microcode using a core specific semaphore.
The SDM and most of the BWGs suggest doing this.

Change-Id: I89a01f6ff94e7d35f1feded3ddb0c43caf7c6c5d
Signed-off-by: Patrick Rudolph 
---
M src/cpu/x86/mp_init.c
M src/cpu/x86/sipi_vector.S
M src/cpu/x86/sipi_vector_c_handler.c
M src/include/cpu/x86/mp.h
4 files changed, 58 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/04/44904/8