Branch: refs/heads/master
Home: https://github.com/tianocore/edk2
Commit: 5ac1b95b3e630b05a51d2037106c2774a5cf7370
https://github.com/tianocore/edk2/commit/5ac1b95b3e630b05a51d2037106c2774a5cf7370
Author: Dongyan Qian <[email protected]>
Date: 2026-06-25 (Thu, 25 Jun 2026)
Changed paths:
M MdeModulePkg/Bus/Pci/PciBusDxe/PciBusDxe.inf
M MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumeratorSupport.c
M MdeModulePkg/MdeModulePkg.dec
Log Message:
-----------
MdeModulePkg/PciBusDxe: Scan funcs when func 0 is absent
The PCI specification normally requires function 0 to be present
before functions 1 through 7 are used. PciBusDxe therefore stops
scanning a slot when probing function 0 fails.
Some virtualized PCI topologies may expose selected non-zero functions
to a guest while function 0 is hidden. Add an opt-in Feature PCD so a
platform can continue collecting device information for functions 1
through 7 when function 0 is absent.
The default remains FALSE, so existing platform behavior is unchanged
unless the platform explicitly enables the PCD.
Signed-off-by: Dongyan Qian <[email protected]>
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