[Qemu-devel] questions about pci

[WanPeng Li <liwp@linux.vnet.ibm.com>]

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