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After the previous patch, TLBs will be flushed on every change to the memory mapping. This patch augments that with synchronization of the MemoryRegionSections referred to in the iotlb array. With this change, it is guaranteed that iotlb_to_region will access the correct memory map, even once the TLB will be accessed outside the BQL. Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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