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Detect unhandleable vectoring in check_emulate_instruction() to prevent infinite retry loops on SVM, and to eliminate the main differences in how VM-Exits during event vectoring are handled on SVM versus VMX. E.g. if the vCPU puts its IDT in emulated MMIO memory and generates an event, without the check_emulate_instruction() change, SVM will re-inject the event and resume the guest, and effectively put the vCPU into an infinite loop. Signed-off-by: Ivan Orlov <iorlov@amazon.com> Link: https://lore.kernel.org/r/20241217181458.68690-6-iorlov@amazon.com [sean: grab "svm" locally, massage changelog] Signed-off-by: Sean Christopherson <seanjc@google.com>