On Thu, Mar 25, 2021 at 11:47 PM, Anthony PERARD wrote:<br />
<blockquote>- ## This value is used to configure X86 Processor FSB clock.<br />- # @Prompt FSB Clock.<br />- gEfiMdePkgTokenSpaceGuid.PcdFSBClock|200000000|UINT32|0x0000000c</blockquote>
hi, Sir<br /><br />This change caused the OVMF failed to load in QEMU when compiled with "SOURCE_DEBUG_ENABLE" as True.<br /><br />the verbose message of QEMU shows:<br />
<blockquote>ASSERT [SecMain] d:\myedk2\edk2\MdePkg\Library\BasePcdLibNull\PcdLib.c(95): ((BOOLEAN)(0==1))</blockquote>
The failure point is&nbsp; PcdGet32 (PcdFSBClock) of debugtimer.c,&nbsp; I&nbsp; rolled back above change, then issue disappeared.<br /><br /><br />