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Re: Assessment of the difficulty in porting CPU architecture for qemu


From: Alistair Francis
Subject: Re: Assessment of the difficulty in porting CPU architecture for qemu
Date: Thu, 15 Feb 2024 13:33:16 +1000

On Fri, Nov 17, 2023 at 5:35 PM 方 <1584389042@qq.com> wrote:
>
>  Hello everyone! I am working on implementing a tool to assess the complexity 
> of CPU architecture porting. It primarily focuses on RISC-V architecture 
> porting. In fact, the tool may have an average estimate of various 
> architecture porting efforts.My focus is on the overall workload and 
> difficulty of transplantation in the past and future,even if a project has 
> already been ported.As part of my dataset, I have collected the **qemu** 
> project. **I would like to gather community opinions to support my 
> assessment. I appreciate your help and response!** Based on scanning tools, 
> the porting complexity is determined to be high, with a significant amount of 
> code related to the CPU architecture in the project.  Is this assessment 
> accurate?Do you have any opinions on personnel allocation and consumption 
> time? I look forward to your help and response.

The people who did the original QEMU RISC-V port aren't involved any more.

You are correct that QEMU is significantly complex to port to a new
architecture compared to most other userspace software. I think it
would be similar to other JIT software in that regard.

Alistair



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