Syzos clgi #6594
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Syzos clgi #6594
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…tions Implement the SYZOS_API_NESTED_AMD_STGI and SYZOS_API_NESTED_AMD_CLGI primitives to toggle the Global Interrupt Flag (GIF). These commands execute the stgi and clgi instructions respectively and require no arguments. Also add a test checking that CLGI correctly masks NMI injection from L0.
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Implement SYZOS_API_NESTED_AMD_INJECT_EVENT to allow the L1 guest to inject events (Interrupts, NMIs, Exceptions) into L2 via the VMCB EVENTINJ field. This primitive abstracts the VMCB bit-packing logic (Vector, Type, Valid, Error Code) into a high-level API, enabling the fuzzer to semantically mutate event injection parameters. This targets KVM's nested event merging logic, specifically where L0 must reconcile L1-injected events with Host-pending events.
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a-nogikh
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Jan 14, 2026
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