Virtio Queries

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Hi, I am a few questions on Virtio, Hope somebody clarifies them

1. What is the address type that is put inside the vring descriptor in the virt queue while placing a request? Is it the guest virtual address or guest physical address?
2. If it is Guest physical address, how qemu converts it to its virtual address before processing the buffer?
3. How does qemu interact with guest once it receives the buffers from the virt queue for doing the IO?

Thx,

Venkat


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