openjdk riscv64 port

[Yadong Wang]

On 2020/12/30 5:02, Edward Nevill wrote:
> On Tue, 2020-12-29 at 02:02 +0000, wangyadong (E) wrote:
>> Hi,
>>     We implemented a RV64G port of OpenJDK11u(TemplateInterpreter, C1 and C2) and open source to https://gitee.com/openeuler/bishengjdk-11/tree/risc-v/ . Would the community like to help us to create a project? And then we can promote it stable with the community.
>>
>> Yadong Wang
>> Huawei Technologies Co., Ltd.
>>
> 
> Hi,
> 
> In order to progress this a riscv-port project will need to be created. There was an initial attempt to get a riscv-port project started in Feb. 2018 (see https://mail.openjdk.java.net/pipermail/porters-dev/2018-February/thread.html).
> 
> The process for creation of a new OpenJDK project is described at http://openjdk.java.net/projects/#new-project
> 
> In accordance with the OpenJDK bylaws the initial discussion should be sent to the general discussion list, discuss.at.openjdk.dot.java.dot.net with the subject line "Call for Discussion: New Project: riscv-port".
> 
> However, it may be best to have an initial discussion here on porters-dev before submitting the formal Call for Discussion on discuss.
> 
> The project will need a project lead who must be a Contributor and must be sponsored by a Group Lead. Although technically any Group Lead could sponsor this project, in practice it should be the Group Lead of the porters project, Dalibor Topic.
> 
> All the best,
> Ed.
> 
> 
> .
> 

Thank you, Ed. We read these discussions before we started. And in fact, 
we started with the Zero-Assembler port based on your initial patch.

Now we have an almost complete implementation of riscv port, and then I 
am willing to perform the project lead. In the past year, I lead our 
riscv port implementation based on OpenJDK, and wrote the substantial 
part. More importantly, I have a JVM team of about 30 engineers in 
Huawei to support me. Although we're new here, we have contributed 
nearly 90 patches to OpenJDK, and now have 1 reviewer, 1 committer, 
several authors and a dozen contributors in the community. They are all 
happy to help me. Also, there are many hardware engineers familiar with 
riscv with who we can co-worked in our company. We were also actively 
participated in many riscv isa task groups.

About future plans, we first contribute an initial riscv port of jdk11, 
latest LTS version so far, covering most of mainstream java frameworks, 
and so we can get more feedback of ecosystem participants. Adequate 
testing is the first priority, and we can co-worked with AdoptOpenJDK to 
build and distribute binaries(they contacted us and were willing to 
offer help), so that interested developers can try them ahead of time. 
The initial port can be split to 3 patches (TemplateInterpreter, C1 and 
C2) to be fully reviewed by the reviewers.

Meanwhile, the mainline version jdk/jdk is also under development and 
ready to open source after tested fully on the hardware.

By the way, AOT and Graal are not covered currently, and we can make 
plans as needed.