[LinuxBIOS] Initiate LDTSTOP (without RESET)

[Lu, Yinghai]

LDTSTOP may need to SB to help.

 

When trying to change cpu fid, CPU need LDTSTOP to make the FID change
effective.  enable_fid_change_on_sb will enable ldtstop on sb.

 

Current Amd8111 support code already have enable_fid_change_on_sb in the
public tree.

 

Serverworks ht1000 need to call ldtstop explicitly to make fid change
effective. I will check in the code after the new cpu is released.

 

The problem the ck804 has problem with ldtstop. We have to use some
other way to make it effective...

 

YH

 

 

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