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Add NOTE for AP handling, 

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jiewen Yao <jiewen.yao@intel.com>
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Jiewen Yao 2016-10-28 22:02:10 +08:00
parent 763a620874
commit 359e96d2c1
1 changed files with 5 additions and 0 deletions
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@ -109,6 +109,11 @@ C. How to build STM BIOS.
to include the resource needed by platform SMI handlers.
To be specific, if a platform overrides StmPlatformLib to access some special MSR, these MSR
must be in the resource list.
7) NOTE:
A platform BIOS CPU driver may put APs to MWAIT state and assume no one touch this APs.
This assumption is wrong, because FRM need wait up APs. FrmLoader uses mMpService->EnableDisableAP()
to disable/enable AP.
The CPU driver need use INIT-SIPI-SIPI to wake up AP, after the AP is disabled/enabled.
D. How to build STM BIOS with TXT capability.
NOTE: MinnowMax does not have TXT support. Below steps are for a platform which has TXT support.