When there are no devices connected to the root bridge, no resources are needed. GetProposedResources() currently considers this an invalid condition (the PI spec doesn't regulate it).
Emitting an empty set of EFI_ACPI_ADDRESS_SPACE_DESCRIPTORs, followed by the required EFI_ACPI_END_TAG_DESCRIPTOR, allows PciHostBridgeResourceAllocator() [MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.c] to advance. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Laszlo Ersek <[email protected]> --- ArmPlatformPkg/ArmVirtualizationPkg/PciHostBridgeDxe/PciHostBridge.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/ArmPlatformPkg/ArmVirtualizationPkg/PciHostBridgeDxe/PciHostBridge.c b/ArmPlatformPkg/ArmVirtualizationPkg/PciHostBridgeDxe/PciHostBridge.c index 96391eb..421699d 100644 --- a/ArmPlatformPkg/ArmVirtualizationPkg/PciHostBridgeDxe/PciHostBridge.c +++ b/ArmPlatformPkg/ArmVirtualizationPkg/PciHostBridgeDxe/PciHostBridge.c @@ -1072,7 +1072,15 @@ GetProposedResources( } if (Number == 0) { - return EFI_INVALID_PARAMETER; + EFI_ACPI_END_TAG_DESCRIPTOR *End; + + End = AllocateZeroPool (sizeof *End); + if (End == NULL) { + return EFI_OUT_OF_RESOURCES; + } + End->Desc = ACPI_END_TAG_DESCRIPTOR; + *Configuration = End; + return EFI_SUCCESS; } Buffer = AllocateZeroPool (Number * sizeof(EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR) + sizeof(EFI_ACPI_END_TAG_DESCRIPTOR)); -- 1.8.3.1 ------------------------------------------------------------------------------ Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ edk2-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/edk2-devel
