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316731c9a5
enable Xsave feature and pass-through it to guests
update based on v2:
- enable host xsave before expose it to guests.
- add validation for the value to be set to 'xcr0' before call xsetbv
when handling xsetbv vmexit.
- tested in SOS guest, created two threads to do different
FP calculations,test code runs in user land of sos.
Signed-off-by: Yonghua Huang <yonghua.huang@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>