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Date: Mon, 16 Sep 2013 16:52:53 +0200
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: Re: [Qemu-devel] [Question] memory: AddressSpace backed by single
	IO MemoryRegion
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To: marcel.a@redhat.com
Cc: qemu-devel@nongnu.org, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>

Il 16/09/2013 16:48, Marcel Apfelbaum ha scritto:
> Hi all,
> 
> I have an AddressSpace backed by a single MemoryRegion which is
> initiated using memory_region_init_io (has ops).
> Once I enable it, I get an assertion:
>     exec.c:806: register_subpage: Assertion `existing->mr->subpage || existing->mr == &io_mem_unassigned' failed.
> 
> 
> Here is the pseudo-code:
>     memory_region_init_io(my_reg, owner, my_ops, my_obj, "my region", INT64_MAX);
>     memory_region_set_enabled(my_reg, false);
>     address_space_init(my_as, my_reg, name);
>     memory_region_set_enabled(my_reg, true);
> Receives:
>     exec.c:806: register_subpage: Assertion `existing->mr->subpage || existing->mr == &io_mem_unassigned' failed.
> 
> Any idea why? Any suggestion would be appreciated.

Backtrace, and print of local variables in mem_add?

Paolo