On August 18, 2022 12:58 PM, Gerd Hoffmann wrote: > On Thu, Aug 18, 2022 at 01:47:37AM +0000, Xu, Min M wrote: > > On August 17, 2022 7:05 PM, Gerd Hoffmann wrote: > > > https://bugzilla.redhat.com/show_bug.cgi?id=2114858 > > > > > > I think the call chain is: > > > > > > -> 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 > > > > > > > I think this bug shares the same root cause. > > https://bugzilla.tianocore.org/show_bug.cgi?id=3974 > > Yes, highly likely this is the same. > > > And there is a fix awaiting for review. > > https://edk2.groups.io/g/devel/message/91132 > > Hmm. When the tdx/sev code actually works properly in runtime mode we > should be able to reserve the workarea, mark it as runtime memory > (SetMemorySpaceAttributes) and access it from runtime code, so we don't > need two different ways to figure what CC mode we are running in. Yes. I will submit a patch to fix it.
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