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memory: add memory_region_flush_rom_device()
ROM devices go via MemoryRegionOps->write() callbacks for write operations and do not dirty/invalidate that memory. Device emulation must be able to mark memory ranges that have been modified internally (e.g. using memory_region_get_ram_ptr()). Introduce the memory_region_flush_rom_device() API for this purpose. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 20190123212234.32068-2-stefanha@redhat.com Reviewed-by: Peter Maydell <peter.maydell@linaro.org> [PMM: fix block comment style] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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