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Re: [Qemu-devel] [PATCH 06/22] memory: dispatch unassigned accesses base
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From: |
Peter Maydell |
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Subject: |
Re: [Qemu-devel] [PATCH 06/22] memory: dispatch unassigned accesses based on .valid.accepts |
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Date: |
Tue, 16 Jul 2013 13:38:18 +0100 |
On 16 July 2013 13:33, Paolo Bonzini <address@hidden> wrote:
> Il 16/07/2013 14:28, Jan Kiszka ha scritto:
>> This changed the value read from unassigned memory from -1 to 0. Any
>> particular reason or an unintentional change?
>
> Cut-and-paste (unassigned RAM used to return 0, invalid MMIO used to
> return -1, unifying the paths dropped the difference).
>
> I guess unassigned RAM can read as -1 just fine, so we can just change
> unassigned_mem_read to return -1.
Behaviour for accesses to unassigned addresses should really
be both bus and CPU specific...
thanks
-- PMM