Branch: refs/heads/master
Home: https://github.com/tianocore/edk2
Commit: ded0b489af09cde5afa05d74acdb12cd4b4f8394
https://github.com/tianocore/edk2/commit/ded0b489af09cde5afa05d74acdb12cd4b4f8394
Author: Yong Li <[email protected]>
Date: 2023-06-06 (Tue, 06 Jun 2023)
Changed paths:
M MdePkg/Library/BaseLib/BaseLib.inf
A MdePkg/Library/BaseLib/RiscV64/SpeculationBarrier.S
Log Message:
-----------
MdePkg/BaseLib: Add SpeculationBarrier implementation for RiscV64
Implement the SpeculationBarrier with implementations consisting of
fence instruction which provides finer-grain memory orderings.
Perform Data Barrier in RiscV: fence rw,rw
Perform Instruction Barrier in RiscV: fence.i; fence r,r
More detail is in Appendix A: RVWMO Explanatory Material in
https://github.com/riscv/riscv-isa-manual
This API is first introduced in the below commits for IA32 and x64
https://github.com/tianocore/edk2/commit/d9f1cac51bd354507e880e614d11a1dc160d38a3
https://github.com/tianocore/edk2/commit/e83d841fdc2878959185c4c6cc38a7a1e88377a4
and below the commit for ARM and AArch64 implementation
https://github.com/tianocore/edk2/commit/c0959b4426b2da45cdb8146a5116bb4fd9b86534
This commit is to add the RiscV64 implementation which will be used by
variable service under Variable/RuntimeDxe
Cc: Andrei Warkentin <[email protected]>
Cc: Evan Chai <[email protected]>
Cc: Sunil V L <[email protected]>
Cc: Tuan Phan <[email protected]>
Signed-off-by: Yong Li <[email protected]>
Reviewed-by: Sunil V L <[email protected]>
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