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<think>
Alright, so I need to classify this bug report about enabling guest mode at AMD IOMMU in QEMU. Let's break it down.
First, understanding what each category means is crucial. The possible categories include things like mistranslation, assembly lowering, device, graphic, socket, network, KVM, boot, vnc, debug, files, permissions, performance, kernel, peripherals, hypervisor, and others.
The bug report mentions "enable guest mode at amd iommu." I know that AMD IOMMU refers to the Input/Output Memory Management Unit in AMD processors. This is part of the virtualization technology, specifically related to hardware-assisted virtualization.
In QEMU, the IOMMU is used for device assignment and passthrough, allowing certain devices to be directly assigned to a guest VM without needing emulation. Enabling guest mode here would relate to how the hypervisor (QEMU) manages this feature.
Looking at the categories, "hypervisor" seems relevant because it's about managing virtual machines' hardware resources. The IOMMU is part of the virtualization layer that the hypervisor controls.
Other possibilities could be 'device' or 'peripherals', but those are more about specific devices being handled rather than the overall management through the hypervisor. Since enabling guest mode in IOMMU is a feature provided by QEMU as a hypervisor, the best fit seems to be the 'hypervisor' category.
</think>
hypervisor
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