[PATCH 0/4] OvmfPkg: measure temp stack usage, restore temp RAM to 64KB

[Laszlo Ersek <lersek@redhat.com>]

The first three patches enable the PEI_CORE to report OVMF's temp
SEC/PEI stack and heap usage.

  - This depends on the new fixed PCD "PcdInitValueInTempStack",
    recently added for
    <https://bugzilla.tianocore.org/show_bug.cgi?id=740>
    ("INIT_CAR_VALUE should be defined in a central location").

  - Ard recently implemented the same in ArmPlatformPkg, for
    <https://bugzilla.tianocore.org/show_bug.cgi?id=748> ("measure temp
    SEC/PEI stack usage").

The last (fourth) patch adapts OVMF to the larger MtrrLib stack demand
that originates from commit 2bbd7e2fbd4b ("UefiCpuPkg/MtrrLib: Update
algorithm to calculate optimal settings", 2017-09-27). OVMF's temp RAM
size is restored to the historical / original 64KB.

This work is tracked in
<https://bugzilla.tianocore.org/show_bug.cgi?id=747> ("measure temp
SEC/PEI stack usage; grow temp SEC/PEI RAM"), with links to related
mailing list discussions.

Repo:   https://github.com/lersek/edk2.git
Branch: temp_ram_tweaks

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>

Thanks
Laszlo

Laszlo Ersek (4):
  OvmfPkg/Sec/Ia32: free up EAX for other uses while setting up the
    stack
  OvmfPkg/Sec/Ia32: seed the temporary RAM with PcdInitValueInTempStack
  OvmfPkg/Sec/X64: seed the temporary RAM with PcdInitValueInTempStack
  OvmfPkg: restore temporary SEC/PEI RAM size to 64KB

 OvmfPkg/OvmfPkgIa32.fdf        |  2 +-
 OvmfPkg/OvmfPkgIa32X64.fdf     |  2 +-
 OvmfPkg/OvmfPkgX64.fdf         |  2 +-
 OvmfPkg/Sec/SecMain.inf        |  1 +
 OvmfPkg/Sec/Ia32/SecEntry.nasm | 19 ++++++++++++++++---
 OvmfPkg/Sec/X64/SecEntry.nasm  | 15 +++++++++++++++
 6 files changed, 35 insertions(+), 6 deletions(-)

-- 
2.14.1.3.gb7cf6e02401b