Avi Kivity wrote:
> Eddie, can you review the attached patch? It improves on your efer
> reload patch by avoiding a reload even if EFER.SCE is different in the
> guest and host, in some scenarios.
>
Avi:
Good optimization! It should be safe since SYSCALL/SYSRET will check
following condition which will always leads to #UD in 32 bits guest no matter
SCE is set or not.
IF (CS.L ≠ 1 ) or (IA32_EFER.LMA ≠ 1) or (IA32_EFER.SCE ≠ 1)
(* Not in 64-Bit Mode or SYSCALL/SYSRET not enabled in IA32_EFER *)
THEN #UD; FI;
thanks, eddie
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