> 2. If it is Guest physical address, how qemu converts it to its virtual address before processing the buffer? > See the logic in cpu_physical_memory_rw() and cpu_physical_memory_map(). ==> Thanks for the reply. Are these the functions which convert the Guest physical addresses to qemu Virtual addresses? If yes, I did not find any routine calling these functions in the Virtio block IO flow. May be I missed it. Can you please point me to the code where Qemu's backend virtio driver is taking the SGE from the virt ring descriptor after it gets a notification from the guest and converting it to a qemu virtual address before calling "read or write" system calls. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
