Avi Kivity wrote: > Ian Jackson wrote: >> 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. >>> >> >> 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. >> > > I agree that we shouldn't expect memory to be contiguous, in order to > properly support hotplug. But I see zero value in trying to support > large memory configurations on 32-bit in 2008. This is what 64-bit > systems are for! If Xen has a problem with 64-bit hosts, we can try to > accommodate it, but to have 32-bit qemu/tcg
Running x86-64 binaries on a (non-x86) 32-bit host is IMHO quite an obvious application for qemu/tcg. > or qemu/kvm support large address spaces is pointless IMO. Interestingly, Virtualbox just started to support 64-bit-target-on-32-bit-host. Thiemo -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html