[PATCH v2 0/6] Fix PEI Core issue during TemporaryRamMigration

["Jordan Justen" <jordan.l.justen@intel.com>]

https://github.com/jljusten/edk2.git temp-ram-support-v2

https://github.com/jljusten/edk2/commits/temp-ram-support-v2

v2:
 * Add AARCH64 and ARM assembly
 * Drop IA32 and X64 .S source files
 * Adjust PEI_CORE_TEMPORARY_RAM_TRANSITION pointer in the assembly
   code based on the stack pointer change before & after
   TemporaryRamSupport->TemporaryRamMigration
 * Drop extra cleanup patches for OvmfPkg & EmulatorPkg. These were
   just complicating the series.

This series fixes an issue that, while rare, is possible based on the
way the TemporaryRamSupport PPI is defined along with how it is used
by the PEI Core.

Liu Yu reported a boot issue with EmulatorPkg, which I believe was
caused by this issue.

The details of the issue are described in the commit message of the
"MdeModulePkg/Core/Pei: Add interface for assembly based
TemporaryRamSupport" patch.

Testing:

I tested building and booting in several scenarios:

* OVMF IA32 & X64 on Linux
* ArmVirtPkg AARCH64 & ARM on x86_64 Linux
* EmulatorPkg IA32 & X64 on Linux

Untested:

* My system does not reproduce the issue that Liu Yu reported with
  EmulatorPkg, so I can't say that I have verified that issue.
* Building on windows
* AARCH64/ARM TemporaryRamMigration.asm sources

Cc: Liu Yu <pedroa.liu@outlook.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Andrew Fish <afish@apple.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Leif Lindholm <leif.lindholm@linaro.org>
Cc: Michael D Kinney <michael.d.kinney@intel.com>

Jordan Justen (6):
  MdeModulePkg/Core/Pei: Add interface for assembly based
    TemporaryRamSupport
  MdeModulePkg/Core/Pei: Add AARCH64 assembly for TemporaryRamMigration
  MdeModulePkg/Core/Pei: Add ARM assembly for TemporaryRamMigration
  MdeModulePkg/Core/Pei: Add IA32 assembly for TemporaryRamMigration
  MdeModulePkg/Core/Pei: Add X64 assembly for TemporaryRamMigration
  MdeModulePkg/Core/Pei: Use code path for assembly based
    TemporaryRamSupport

 .../AArch64/TemporaryRamMigration.S           | 63 +++++++++++++++
 .../AArch64/TemporaryRamMigration.asm         | 63 +++++++++++++++
 .../Dispatcher/Arm/TemporaryRamMigration.S    | 68 ++++++++++++++++
 .../Dispatcher/Arm/TemporaryRamMigration.asm  | 68 ++++++++++++++++
 MdeModulePkg/Core/Pei/Dispatcher/Dispatcher.c | 59 +++++++++-----
 .../Ia32/TemporaryRamMigration.nasm           | 77 +++++++++++++++++++
 .../Dispatcher/X64/TemporaryRamMigration.nasm | 74 ++++++++++++++++++
 MdeModulePkg/Core/Pei/PeiMain.h               | 52 +++++++++++++
 MdeModulePkg/Core/Pei/PeiMain.inf             | 15 ++++
 9 files changed, 518 insertions(+), 21 deletions(-)
 create mode 100644 MdeModulePkg/Core/Pei/Dispatcher/AArch64/TemporaryRamMigration.S
 create mode 100644 MdeModulePkg/Core/Pei/Dispatcher/AArch64/TemporaryRamMigration.asm
 create mode 100644 MdeModulePkg/Core/Pei/Dispatcher/Arm/TemporaryRamMigration.S
 create mode 100644 MdeModulePkg/Core/Pei/Dispatcher/Arm/TemporaryRamMigration.asm
 create mode 100644 MdeModulePkg/Core/Pei/Dispatcher/Ia32/TemporaryRamMigration.nasm
 create mode 100644 MdeModulePkg/Core/Pei/Dispatcher/X64/TemporaryRamMigration.nasm

-- 
2.20.1