Re: [edk2-devel] [PATCH] OvmfPkg: Don't make APIC MMIO accesses with encryption bit set

["Lendacky, Thomas via groups.io" <thomas.lendacky=amd.com@groups.io>]

On 4/24/24 09:45, Gerd Hoffmann wrote:
>    Hi,
> 
>>> Ideally CpuPageTableLib should be used for this.
>>
>> CpuPageTableLib will need to be modified in order for it to be used at this
>> (Sec) stage. In order to work in Sec - either the caller will have to supply
>> a list of pages that can be used if pagetable entries need to be allocated
>> for splits
> 
> I don't think so.  PageTableMap() has the 'Buffer' parameter for passing
> in page table memory.  And the patch reserves a page in MEMFD.  Handing
> that page over to PageTableMap() should work just fine, no?

Oh, I thought the library allocated the pages, my bad. Mike and I will 
take a look at that.

Thanks,
Tom

> 
> take care,
>    Gerd
> 


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