On Thu, Mar 25, 2021 at 11:47 PM, Anthony PERARD wrote:

> 
> - ## This value is used to configure X86 Processor FSB clock.
> - # @Prompt FSB Clock.
> - gEfiMdePkgTokenSpaceGuid.PcdFSBClock|200000000|UINT32|0x0000000c

hi, Sir

This change caused the OVMF failed to load in QEMU when compiled with 
"SOURCE_DEBUG_ENABLE" as True.

the verbose message of QEMU shows:

> 
> ASSERT [SecMain]
> d:\myedk2\edk2\MdePkg\Library\BasePcdLibNull\PcdLib.c(95):
> ((BOOLEAN)(0==1))

The failure point is  PcdGet32 (PcdFSBClock) of debugtimer.c,  I  rolled back 
above change, then issue disappeared.


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