On August 31, 2021 1:35 PM, Gerd Hoffmann wrote: > On Tue, Aug 31, 2021 at 03:09:08AM +0000, Xu, Min M wrote: > > On Monday, August 30, 2021 3:41 PM, Gerd Hoffmann wrote: > > > Hi, > > > > > > > _TdxPageTable: > > > > If 5-level page table is supported (GPAW is 52), a top level page > > > > directory pointers (1 * 256TB entry) is generated in this page. > > > > _OvmfPageTable: > > > > Initial page table for standard Ovmf. > > > > > > Hmm, isn't 5-level paging independent from TDX? Why mix the two? > > > > > > I think a top level page directory should be added to the standard > > > ovmf initial page tables instead, and setting up 5-level paging > > > should not happen in tdx- specific code. > > In current Ovmf implementation > > (OvmfPkg/ResetVector/Ia32/PageTables64.asm) > > there are 6 pages reserved for initial page tables. It doesn't support > > 5-level > paging. > > Sure. And I think we should add proper 5-level paging support to the current > ovmf implementation instead of adding hacks to the tdx code. My understanding is that we should first add 5-level paging support in OVMF, right? I am planning to add 5-level paging in OvmfPkgX64.dsc. Any comments? > > take care, > Gerd > > > > >
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