Re: [Qemu-devel] [PATCH 1/6] kvm: memory aliasing support for kvm

[Anthony Liguori <anthony@codemonkey.ws>]

Glauber Costa wrote:
> We use information encoded in phys_offset to support memory
> alias for kvm-all.c. Recall that for any given memory slot,
> userspace_addr = phys_ram_base + phys_offset (without any flags).
>
> This way, we can detect whether or not the registered slot is
> effectively pointing to the same area, regardless of the fact
> that it has a different guest_phys_addr.
>   

I think we've missed the abstraction here.  If you added an arch hook 
for kvm_set_phys_mem(), then you could have hidden the alias stuff 
entirely within target-i386/x86.c

But we can fix that up later.

Regards,

Anthony Liguori