Current implementation for cache management (instruction/data flush/invd)
depends on fence.i instruction. All RV platforms may not use the same
method for cache management. Instead RV defines CMO Cache management
operations specification which consits of cbo.x instructions for cache
management. However it requires GCC12+ to enable the same. Need to decide
how cbo based implementation coexists with ifence based implementation
with GCC version dependency.

This patchset is primarily to review the same and decide path forward.
review branch: https://github.com/rivosinc/edk2/tree/dev_rv_cmo_v3


Dhaval Sharma (2):
  WIP: MdePkg/RiscVCMOCacheMaintenanceLib:Enable RISCV CMO
  OvmfPkg/RiscVVirt: Enable CMO support

 MdePkg/MdePkg.dsc                                                          |   1 +
 OvmfPkg/RiscVVirt/RiscVVirtQemu.dsc                                        |   9 +
 MdePkg/Library/RiscVCMOCacheMaintenanceLib/RiscVCMOCacheMaintenanceLib.inf |  30 ++
 MdePkg/Library/RiscVCMOCacheMaintenanceLib/RiscVCMOCache.c                 | 377 ++++++++++++++++++++
 MdePkg/Library/RiscVCMOCacheMaintenanceLib/RiscVCMOCacheMaintenanceLib.uni |  11 +
 MdePkg/Library/RiscVCMOCacheMaintenanceLib/RiscVCpuCMOCache.S              |  23 ++
 6 files changed, 451 insertions(+)
 create mode 100644 MdePkg/Library/RiscVCMOCacheMaintenanceLib/RiscVCMOCacheMaintenanceLib.inf
 create mode 100644 MdePkg/Library/RiscVCMOCacheMaintenanceLib/RiscVCMOCache.c
 create mode 100644 MdePkg/Library/RiscVCMOCacheMaintenanceLib/RiscVCMOCacheMaintenanceLib.uni
 create mode 100644 MdePkg/Library/RiscVCMOCacheMaintenanceLib/RiscVCpuCMOCache.S

-- 
2.40.0.rc0.57.g454dfcbddf



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