[PATCH 0/2] SEV-SNP guest support fixes

["Lendacky, Thomas" <thomas.lendacky@amd.com>]

This patch series provides some fixes around AP creation:

- An erratum on AMD hardware requires that a VMSA not be aligned on a
  2MB boundary. To work around this issue, allocate 2 pages of memory
  and using the page that is not 2MB aligned and freeing the other.

- When parking APs after exiting boot services, the current SNP support
  will perform an allocation that will not be reflected in memory map
  being supplied to the OS. Instead of allocating new VMSAs each time,
  re-use the current VMSA.

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4353

---

These patches are based on commit:
f80f052277c8 ("OvmfPkg/RiscVVirt: Add Stack HOB")

Cc:	Eric Dong <eric.dong@intel.com>
Cc:	Ray Ni <ray.ni@intel.com>
Cc:	Rahul Kumar <rahul1.kumar@intel.com>
Cc:	Gerd Hoffmann <kraxel@redhat.com>
Cc:	Michael Roth <michael.roth@amd.com>
Cc:	Ashish Kalra <Ashish.Kalra@amd.com>

Tom Lendacky (2):
  UefiCpuPkg/MpInitLib: Ensure SEV-SNP VMSA allocations are not 2MB
    aligned
  UefiCpuPkg/MpInitLib: Reuse VMSA allocation to avoid unreserved
    allocation

 UefiCpuPkg/Library/MpInitLib/X64/AmdSev.c | 224 ++++++++++++++--------
 1 file changed, 144 insertions(+), 80 deletions(-)

-- 
2.39.1