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由 Avi Kivity 提交于
ppc maps the escc mmio region both at a fixed offset (as a sysbus area) and as part of a PCI BAR. This crashes, since a MemoryRegion may have only one parent. Use an alias so we have a separate MemoryRegion for the BAR. Signed-off-by: NAvi Kivity <avi@redhat.com>
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