On 2012-06-24 16:35, Avi Kivity wrote: > On 06/24/2012 05:08 PM, Jan Kiszka wrote: >> As a first step, I will post a series later that gets rid of >> kvm_flush_coalesced_mmio_buffer in the common vmexit path. > > If you defer this, I can think of two places that need to flush: > - anything that accesses those memory areas (such as DMA to the > framebuffer, or updating the display) - anything that accesses related areas (in case of VGA: PIO accesses to the control ports). I'm providing memory_region_set_flush_coalesced that allows to flush on non-coalesced region accesses as well. Some PIO accesses unfortunately still need open-coded qemu_flush_coalesced_mmio_buffer as they do not use memory regions yet. > - anything that modifies the memory map and possibly changes flushed > addresses Good point, need to address this. Jan
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