[edk2-devel] [PATCH v2 00/10] OvmfPkg/ResetVector: cleanup and add 5-level paging support.

["Gerd Hoffmann" <kraxel@redhat.com>]

So I ran with the suggestion by Laszlo to move the page table setup into
macros and untangle the non-CoCo / TDX / SEV code paths.  The first five
patches of the series are doing that (without functional changes).

Support for 5-level paging is added by the following five patches.  This
way it is indeed easier to understand.  Additional bonus is that the
patches can be splitted into smaller pieces and 5-level paging for the
three cases (non-CoCo / TDX / SEC) can be enabled independently.

The SEV patches (#9 + #10) are included here for completeness, but it is
probably a good idea to merge them only after 5-level paging support was
added to BaseMemEncryptSevLib.  This way we can turn on 5-level paging
support without breaking SEV.

v2 changes:
 - remove SetCr3La57 label, use Enable5LevelPaging macro instead.
 - turn GetSevCBitMaskAbove31 into a macro.
 - comment fixes.

Gerd Hoffmann (10):
  OvmfPkg/ResetVector: improve page table flag names
  OvmfPkg/ResetVector: add ClearOvmfPageTables macro
  OvmfPkg/ResetVector: add CreatePageTables4Level macro
  OvmfPkg/ResetVector: split TDX BSP workflow
  OvmfPkg/ResetVector: split SEV and non-CoCo workflows
  OvmfPkg/ResetVector: add 5-level paging support
  OvmfPkg/ResetVector: print post codes for 4/5 level paging
  OvmfPkg/ResetVector: wire up 5-level paging for TDX
  OvmfPkg/ResetVector: leave SEV VC handler installed longer
  OvmfPkg/ResetVector: wire up 5-level paging for SEV

 OvmfPkg/ResetVector/ResetVector.inf       |   1 +
 OvmfPkg/ResetVector/Ia32/AmdSev.asm       |  40 ++-
 OvmfPkg/ResetVector/Ia32/IntelTdx.asm     |  17 +-
 OvmfPkg/ResetVector/Ia32/PageTables64.asm | 299 +++++++++++++++++-----
 OvmfPkg/ResetVector/Main.asm              |   4 +
 OvmfPkg/ResetVector/ResetVector.nasmb     |   5 +-
 6 files changed, 272 insertions(+), 94 deletions(-)

-- 
2.44.0



-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#116215): https://edk2.groups.io/g/devel/message/116215
Mute This Topic: https://groups.io/mt/104660109/7686176
Group Owner: devel+owner@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [rebecca@openfw.io]
-=-=-=-=-=-=-=-=-=-=-=-