memory: introduce memory_region_present
This new API will avoid having too many memory_region_ref/unref
in paths that currently use memory_region_find.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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This new API will avoid having too many memory_region_ref/unref
in paths that currently use memory_region_find.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>