commit aa02571 ("MdeModulePkg: Change EndofDxeEvent TPLs to TPL_CALLBACK")
changed EndOfDxeEvent TPLs from TPL_NOFIY to TPL_CALLBACK.
However this commit makes a boot failure on the FVP platform when FPDT
ACPI table generation is enabled:
[FirmwarePerformanceDxe] Error when lock variable FirmwarePerformance, Status = Write Protected
ASSERT_EFI_ERROR (Status = Write Protected)
ASSERT [FirmwarePerformanceDxe] FirmwarePerformanceDxe.c(405): !(((RETURN_STATUS)(Status)) >= 0x8000000000000000ULL)
Currently, EVT_NOTIFY_SIGNAL events are managed in FILO order,
as new events are inserted using InsertHeadList().
The sequence is as follows:
1. DxeCore initializes DxeCorePerformanceLib, whose constructor creates
an EndOfDxe event (gEfiEndOfDxeEventGroupGuid) with the
ReportFpdtRecordBuffer() callback.
2. MmCommunicationDxe (in ArmPkg) creates another EndOfDxe event to
notify StandaloneMm. This event is inserted ahead of the one created
in (1).
3. PlatformBootManagerBeforeConsole() signals EndOfDxe, which triggers
the event created in (2) first.
4. When the callback from (2) runs, StandaloneMm calls
LockVariablePolicy().
5. The callback from (1) is then invoked and attempts to update FPDT via
InstallFirmwarePerformanceDataTable(). During this process, it tries
to register a variable policy for the FirmwarePerformance variable.
However, since the Variable Policy interface was locked in (4), the
operation fails with EFI_WRITE_PROTECTED.
To resolve this issue, revert EndofDxeEvent TPLs to TPL_NOTIFY for FPDT.
Fixes: aa02571 ("MdeModulePkg: Change EndofDxeEvent TPLs to TPL_CALLBACK")
Signed-off-by: Yeoreum Yun <yeoreum.yun@arm.com>
8c50e656c0