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Service x86 device exits within a cancellable native execution call - #212
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Windows NT guests generate sustained streams of device exits. Returning through the outer execution setup for every handled exit adds overhead and makes timer delivery harder to coordinate.
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X86.RunUntilto service handled exits synchronously inside one native execution call while retaining context cancellation, exact unhandled exits, and handler errors.Rundelegates to the same implementation. Document borrowed I/O-buffer lifetime and concurrentSetIRQdelivery, including the requirement to join delivery before closing the machine.Validation:
GOWORK=off go test ./hypervisor -run TestX86 -count=1passes on Linux/amd64 with KVM. The regression exercises handled exit streams, cancellation, handler errors, and resumption. Used by the x86/x64 Windows NT smoke campaign in trex and TinyRangeX.Merge order: this PR → tinyrange/trex#48 → https://github.com/tinyrange/tinyrangex/pull/76. Both downstream repositories pin the corresponding dependency commits.