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static_allocator: skip ACPI objects referring all functions of a PCI device

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According to section 6.1.1, ACPI Spec 6.4, _ADR of a device object under
PCI/PCIe bus can use a special function number 0xFFFF to refer to all
functions of a certain device. Such objects will have their own nodes in
the board XML, and that causes build-time issues when a static allocator
attempts to get all BDFs occupied under the root bus because 0xFFFF is not
a valid function number (which ranges from 0 to 7).

This patch skips ACPI devices with such addresses when listing existing
BDFs.

Tracked-On: #8293
Signed-off-by: Junjie Mao <junjie.mao@intel.com>
This commit is contained in:
Junjie Mao 2022-11-07 23:31:57 +08:00 committed by acrnsi-robot
parent 0a4c76357e
commit 0cee1f8080
1 changed files with 9 additions and 1 deletions
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10
misc/config_tools/static_allocators/bdf.py
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@ -81,7 +81,15 @@ def get_devs_bdf_native(board_etree):
bus = int(common.get_node("../@address", node), 16)
dev = int(address, 16) >> 16
func = int(address, 16) & 0xffff
dev_list.append(lib.lib.BusDevFunc(bus = bus, dev = dev, func = func))
# According to section 6.1.1, ACPI Spec 6.4, _ADR of a device object under PCI/PCIe bus can use a special
# function number 0xFFFF to refer to all functions of a certain device. Such objects will have their own nodes
# in the board XML, but are out of the scope here as we are only interested in concrete BDFs that are already
# occupied.
#
# Thus, if the function number is 0xffff, we simply skip it.
if func != 0xffff:
dev_list.append(lib.lib.BusDevFunc(bus = bus, dev = dev, func = func))
return dev_list
def get_devs_bdf_passthrough(scenario_etree):