Hi all: I read pci code in qemu about i440fx, pci.c and so on. I think if guest os whose mainboard is based on x86, it will use IO instructions to access PCI configuration space.If not use passthrough, qemu should emulate these operations.I find a function called kvm_handle_io who will emulate ioport write/read, I have traced this function, but I haven't found it has any relationship with pci read/write configuration space functions like i440fx_write_config and piix3_write_config.So how does it emulate pci configuration space access when not use passthrough?
thanks Wanpeng Li LTC China, IBM
