On Sat, Dec 14, 2013 at 11:32 AM, shiv prakash Agarwal <chhotu.shiv@xxxxxxxxx> wrote: > Hi All, > > How devices config spaces are mapped to host memory? > Is it being handled by core driver? I could not locate. The PCI core does not map config space into memory. That's not even possible for the legacy config access methods, e.g., using I/O ports 0xcf8 and 0xcfc [1]. If you're wondering about how Linux uses ECAM, that's mostly in arch/x86/pci/mmconfig*. That code does ioremap the ECAM area into kernel virtual space, but only for access via pci_read_config_word(), pci_write_config_word(), etc. Bjorn [1] http://en.wikipedia.org/wiki/PCI_configuration_space#Software_implementation -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
