Avi Kivity writes ("[Qemu-devel] Re: [PATCH 2 of 5] add can_dma/post_dma for
direct IO"):
> Newer Xen shouldn't have this problem though; it runs qemu in kernel
> mode in a dedicated 64-bit domain.
This is not yet the default configuration and there are still various
reasons why you might not want to use it. I expect we'll retain the
dom0 user process option for a while yet.
I think there is continued value in being able to emulate a guest
whose physical address space exceeds the virtual address space in the
host. The whole assumption that all guest accessible RAM is mapped at
once, contiguously, is I think wrong.
Ian.
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