[edk2-devel] [PATCH v2 1/1] MdePkg/BaseLib: Add SpeculationBarrier implementation for RiscV64

[Sunil V L]

On Thu, Jun 01, 2023 at 06:56:05PM +0800, Yong Li wrote:
> 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 <andrei.warkentin at intel.com>
> Cc: Evan Chai <evan.chai at intel.com>
> Cc: Sunil V L <sunilvl at ventanamicro.com>
> Cc: Tuan Phan <tphan at ventanamicro.com>
> Signed-off-by: Yong Li <yong.li at intel.com>
> ---

Reviewed-by: Sunil V L <sunilvl at ventanamicro.com>

Thanks,
Sunil


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