Re: [edk2-devel] [PATCH v2 0/5] OvmfPkg: Add support for 5-level paging

["Min Xu" <min.m.xu@intel.com>]

On Wednesday, January 31, 2024 4:24 PM, Gerd Hoffmann wrote:
> On Wed, Jan 31, 2024 at 06:19:38AM +0000, Xu, Min M wrote:
> > On Tuesday, January 30, 2024 8:32 PM, Gerd Hoffmann wrote:
> > >
> > > Patch #1 has been submitted separately last week.
> > > Intewl raised concerns that removing or renaming the PCD breaks
> > > platforms, so I'm just doing the minimal fix here.
> > >
> > > Patch #2 + #3 update OvmfPkg ResetVector and PlatformInitLib for
> > > 5-level paging support.
> > >
> > > Tom, Min: can you test this patch set with SEV / TDX?
> > >
> > We test the patch in TDX with PcdUse5LevelPageTable TRUE. It failed if the
> td-guest is configured with multiple vCpus. We're investigating what
> happened.
> 
> My first guess would be we need to somehow propagate to the APs that
> cr4.la57 must be set.
Yes, we make a quick poc that set the LA57 for APs. It works in multiple vCPUs scenario.

Thanks
Min


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