[PATCH] UefiCpuPkg/LocalApicLib: Exclude second SendIpi on AMD

[Leo Duran <leo.duran@amd.com>]

This patch is related to the patch-set discussed here:
https://www.mail-archive.com/edk2-devel@lists.01.org/msg27020.html

The GetProcessorLocationByApicId portion of that patch-set was pushed,
but the SendIpi issue was defered based on questions Jeff raised here:
https://www.mail-archive.com/edk2-devel@lists.01.org/msg27195.html

In any event, I do not have public documents explictly describing that
a) second SendIpi is not required on AMD processors, or that
b) only a single SendIpi is required on AMD processors.

However, as stated in the commit log:
On AMD processors the second SendIpi in the SendInitSipiSipi and
SendInitSipiSipiAllExcludingSelf routines is not required, and may cause
undesired side-effects during MP initialization.

Leo Duran (1):
  UefiCpuPkg/LocalApicLib: Exclude second SendIpi sequence on AMD
    processors.

 UefiCpuPkg/Library/BaseXApicLib/BaseXApicLib.c             | 12 ++++++++----
 UefiCpuPkg/Library/BaseXApicX2ApicLib/BaseXApicX2ApicLib.c | 12 ++++++++----
 2 files changed, 16 insertions(+), 8 deletions(-)

-- 
2.7.4