On December 14, 2022 12:05 AM, Lendacky, Thomas wrote:
> On 12/12/22 23:48, Min Xu wrote:
> > From: Tom Lendacky <thomas.lenda...@amd.com>
> >
> > Add support to use the reserved shared memory within the IoMmu library.
> > This improves boot times for all SEV guests, with SEV-SNP benefiting
> > the most as it avoids the page state change call to the hypervisor.
>
> Thanks for including the patch, Min.
>
> One difference between my original and yours noted below, feel free to
> ignore, though.
>
> Otherwise, tested and validated.
>
> >
> > - if (CC_GUEST_IS_SEV (PcdGet64 (PcdConfidentialComputingGuestAttr)))
> {
> > - //
> > - // Clear the memory encryption mask on the plaintext buffer.
> > - //
> > - Status = MemEncryptSevClearPageEncMask (
> > - 0,
> > - MapInfo->PlainTextAddress,
> > - MapInfo->NumberOfPages
> > - );
> > - } else if (CC_GUEST_IS_TDX (PcdGet64
> > (PcdConfidentialComputingGuestAttr))) {
> > + if (MapInfo->ReservedMemBitmap == 0) {
> > //
> > // Set the memory shared bit.
>
> My original patch deleted this line since it is different for each type of CC
> guest and commented about in each if block.
>
Thanks for reminder. I will delete this line in the next version.
Thanks
Min
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