Current implementation for cache management (instruction/data flush/invd)
depends on ifence 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_v1

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

OvmfPkg/RiscVVirt/RiscVVirtQemu.dsc | 9 ++
MdePkg/Library/BaseLib/BaseLib.inf | 1 +
MdePkg/Library/BaseCacheMaintenanceLib/RiscVCache.c | 126 ++++++++++++++++++--
MdePkg/Library/BaseLib/RiscV64/RiscVCpuCache.S | 23 ++++
4 files changed, 152 insertions(+), 7 deletions(-)
create mode 100644 MdePkg/Library/BaseLib/RiscV64/RiscVCpuCache.S

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2.40.0.rc0.57.g454dfcbddf