Files
acrn-hypervisor/hypervisor/arch/x86/guest
Conghui Chen e61412981d hv: support xsave in context switch
xsave area:
    legacy region: 512 bytes
    xsave header: 64 bytes
    extended region: < 3k bytes

So, pre-allocate 4k area for xsave. Use certain instruction to save or
restore the area according to hardware xsave feature set.

Tracked-On: #4166
Signed-off-by: Conghui Chen <conghui.chen@intel.com>
Reviewed-by: Anthony Xu <anthony.xu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
2019-12-02 09:31:12 +08:00
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