It is a common practice to parse PCI BDF in the static allocators. This
patch moves the BusDevFunc class (which is a named tuple encoding a BDF) to
lib.py and uses it for BDF parsing throughout the static allocators.
Tracked-On: #6287
Signed-off-by: Junjie Mao <junjie.mao@intel.com>
Assign bdf to pci emulated and passthrough devices.
For pre-launched VM, assigns unique bdf to passthrough devices, inter-vm
shared memory, pci vuart(console and communication vuarts).
For SOS vm, assigns unique bdf to inter-vm shared memory and pci
vuart(console and communication vuarts).
The bdf follows the rules below:
- the bdf 00:00.0 is reserved for pci hostbridge
- the assigned bdf range: bus is 0x00, dev is in range [0x1, 0x20)
and the fuc is 0x00
- the bdf must be unique, which means any vm's emulated devices cannot
share the same bdf with existing devices
- some devices's bdf is hardcoded, modify its bdf would leads the
device cannot be dicoverd by os. A HARDCODED_BDF_LIST in bdf.py documents
them
- the passthrough devices' bdf can be reused in SOS vm
Tracked-On: #6024
Signed-off-by: Yang,Yu-chu <yu-chu.yang@intel.com>
Reviewed-by: Junjie Mao <junjie.mao@intel.com>
