Avi Kivity wrote: > On 07/24/2009 12:41 PM, Jan Kiszka wrote: >> Jan (who is now patching his guest to avoid wbinvd where possible) >> >> > > Is there ever a case where it is required? What about under a > hypervisor (i.e. check the hypervisor enabled bit). > Reminds me of the discussion in '07 when I first stumbled over this :) : Yes, the bochs bios could safely skip the wbinvd in qemu mode. But that won't safe us from Linux and - far more problematic - Windows or any binary-only guest which think they have to issue it. One may the close eyes, fire up the guest and then start the time-critical host application in the hope that the guest remains calm as long as it's up and running. But, well... Jan
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