[PATCH v2 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

---

Changes since v1:
  - Change the order of the patches to make the patch diffs easier
    to review
  - Add erratum number to the patch description and code comment
  - Use existing ALIGN_POINTER macro

These patches are based on commit:
5eb3d1bcc16f ("ArmVirtPkg: can't find gUefiOvmfPkgTokenSpaceGuid")

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

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

-- 
2.40.0