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Currently vpci treats IO port CF9 as a regular PCI CONFIG_ADDRESS port, so that SOS can't do system reboot through port CF9. This patch handles port CF9 in this way: - SOS (vm0): it is allowed to actually access the physical IO port for byte accesses. - UOS (non-vm0) or partitioning guests: any accesses to port CF9 are ignored. Tracked-On: #1568 Signed-off-by: Zide Chen zide.chen@intel.com Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>