Platforms such as Xen already enumerates PCI bridges and devices. Use
this PCD to control EDK2 behavior.
PcdPciDisableBusEnumeration is placed under [PcdsFixedAtBuild,
PcdsPatchableInModule, PcdsDynamic, PcdsDynamicEx], so that it is
possible to alter it during runtime.
The default setting of this PCD is false (allow full PCI enumeration) to
preserve the same behavior before this change.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Michael Kinney <michael.d.kinney@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14940
6f19259b-4bc3-4df7-8a09-
765794883524
);\r
} \r
\r
- gFullEnumeration = (BOOLEAN) ((SearchHostBridgeHandle (Controller) ? FALSE : TRUE));\r
+ if (PcdGetBool (PcdPciDisableBusEnumeration)) {\r
+ gFullEnumeration = FALSE;\r
+ } else {\r
+ gFullEnumeration = (BOOLEAN) ((SearchHostBridgeHandle (Controller) ? FALSE : TRUE));\r
+ }\r
\r
//\r
// Open Device Path Protocol for PCI root bridge\r
gEfiMdeModulePkgTokenSpaceGuid.PcdSrIovSupport\r
gEfiMdeModulePkgTokenSpaceGuid.PcdAriSupport\r
gEfiMdeModulePkgTokenSpaceGuid.PcdMrIovSupport\r
+ gEfiMdeModulePkgTokenSpaceGuid.PcdPciDisableBusEnumeration\r
\r
# [Event]\r
# ##\r
## This PCD specified whether the S.M.A.R.T feature of attached ATA hard disks are enabled.\r
gEfiMdeModulePkgTokenSpaceGuid.PcdAtaSmartEnable|TRUE|BOOLEAN|0x00010065\r
\r
+ ## This PCD specifies whether full PCI enumeration is disabled.\r
+ gEfiMdeModulePkgTokenSpaceGuid.PcdPciDisableBusEnumeration|FALSE|BOOLEAN|0x10000048\r
+\r
[PcdsPatchableInModule]\r
## Specify memory size with page number for PEI code when \r
# the feature of Loading Module at Fixed Address is enabled\r