Avi Kivity wrote: > On 02/13/2010 11:51 AM, Jan Kiszka wrote: >> From: Jan Kiszka<[email protected]> >> >> VMX requires a properly set instruction length VM entry field when >> trying to inject soft exception and interrupts. We have to preserve this >> state across VM save/restore to avoid breaking the re-injection of such >> events on Intel. So add it to the new VCPU event state. >> >> > > Can't we fake it? set instruction length to 1 and rewind rip by 1. > > The only case where I think this can fail is if we have a fault during > the soft exception injection.
I don't think so. If e.g. privileged soft exception delivery failed, we happen to return to user space at this point and we then start a migration, we have to deal with arbitrary lengths on re-injection on the migration target. Jan
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