[PATCH v2 00/11] SEV-ES guest support fixes and cleanup

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

From: Tom Lendacky <thomas.lendacky@amd.com>

This patch series provides some fixes, updates and cleanup to the SEV-ES
guest support:

- Update the calculation of the qword offset of fields within the GHCB
  by removing the hardcoding of the offsets and using the OFFSET_OF ()
  and sizeof () functions to calculate the values. Remove unused values
  and add values that will be used in later patches.

- Set the SwExitCode, SwExitInfo1, SwExitInfo2 and SwScratch valid bits
  in the GHCB ValidBitmap area when these fields are for a VMGEXIT. This
  is done by adding two new interfaces to the VmgExitLib library to set
  and test the bits of the GHCB ValidBitmap. This reduces code duplication
  and keeps access to the ValidBitmap field within the VmgExitLib library.

- Update the Qemu flash drive services support to add SEV-ES support for
  erasing blocks.

- Disable interrupts when using the GHCB.

- Use the processor number for setting the AP stack pointer instead of the
  APIC ID by calling GetProcessorNumber().

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3008

---

These patches are based on commit:
ae511331e0fb ("BaseTools Build_Rule: Add the missing ASM16_FLAGS for ASM16 source file")

Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Brijesh Singh <brijesh.singh@amd.com>

Changes since v1:
- For the GHCB savearea changes, create a new reserved area name instead
  of "renumbering" the reserved areas.
- Rework the ValidBitmap set/test support to be part of the VmgExitLib
  library. Create two new interfaces for setting and testing bits in the
  GHCB ValidBitmap field and adjust all existing code and the new code in
  this series to use these interfaces for the ValidBitmap updates/checks.
- Don't disable interrupts for just the Qemu flash services support, but
  rather, cover all users of the GHCB by disabling interrupts in VmgInit()
  and restoring them in VmgDone(). This requires changes to those
  interaces.

Tom Lendacky (11):
  MdePkg, OvmfPkg: Clean up GHCB field offsets and save area
  UefiCpuPkg/VmgExitLib: Add interfaces to set/read GHCB ValidBitmap
    bits
  OvmfPkg/VmgExitLib: Implement new VmgExitLib interfaces
  OvmfPkg/VmgExitLib: Set the SW exit fields when performing VMGEXIT
  OvmfPkg/VmgExitLib: Set the SwScratch valid bit for IOIO events
  OvmfPkg/VmgExitLib: Set the SwScratch valid bit for MMIO events
  UefiCpuPkg/MpInitLib: Set the SW exit fields when performing VMGEXIT
  OvmfPkg/QemuFlashFvbServicesRuntimeDxe: Set the SwScratch valid bit
  OvmfPkg/QemuFlashFvbServicesRuntimeDxe: Fix erase blocks for SEV-ES
  UefiCpuPkg, OvmfPkg: Disable interrupts when using the GHCB
  UefiCpuPkg/MpInitLib: For SEV-ES guest, set stack based on processor
    number

 MdePkg/Include/Register/Amd/Ghcb.h                    |  40 +++---
 UefiCpuPkg/Include/Library/VmgExitLib.h               |  51 +++++++-
 OvmfPkg/Library/VmgExitLib/VmgExitLib.c               |  84 ++++++++++++-
 OvmfPkg/Library/VmgExitLib/VmgExitVcHandler.c         | 129 ++++++--------------
 OvmfPkg/QemuFlashFvbServicesRuntimeDxe/QemuFlash.c    |   4 +-
 OvmfPkg/QemuFlashFvbServicesRuntimeDxe/QemuFlashDxe.c |   6 +-
 UefiCpuPkg/Library/MpInitLib/DxeMpLib.c               |   5 +-
 UefiCpuPkg/Library/MpInitLib/MpLib.c                  |  14 ++-
 UefiCpuPkg/Library/VmgExitLibNull/VmgExitLibNull.c    |  60 +++++++--
 UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm         |   6 +
 10 files changed, 258 insertions(+), 141 deletions(-)

-- 
2.28.0