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charset="us-ascii" Content-Transfer-Encoding: quoted-printable On August 17, 2022 7:05 PM, Gerd Hoffmann wrote: > https://bugzilla.redhat.com/show_bug.cgi?id=3D2114858 >=20 > I think the call chain is: >=20 > -> linux does efi runtime call > -> some debug message printed > -> OvmfPkg/Library/PlatformDebugLibIoPort/DebugLib.c > -> MdePkg/Library/BaseIoLibIntrinsic (IoWriteFifo8) > -> OvmfPkg/Library/CcProbeLib (CcProbe) > -> page fault when trying to access WorkArea >=20 I think this bug shares the same root cause. https://bugzilla.tianocore.org= /show_bug.cgi?id=3D3974 And there is a fix awaiting for review. https://edk2.groups.io/g/devel/mess= age/91132 Gerd, what's your thought? Thanks Min