Re: [Qemu-devel] Call for GSoC & Outreachy 2018 mentors & project ideas

[Paolo Bonzini]

On 20/02/2018 11:36, Stefan Hajnoczi wrote:
> === Multi-CPU cluster support for GDB server in QEMU ===
> 
> There are many examples in modern computing where multiple CPU
> clusters are grouped together in a single SoC. This is common in the
> ARM world especially. There are numerous examples such as ARM's
> big.LITTLE implementations and Xilinx's 4xA53s and 2xR5s on the ZynqMP
> SoC. The goal of this task is to add support to the GDB server to
> allow users to debug across these clusters.
> 
> This is another step towards single binary QEMU as well.
> 
>  Detailed description of the project.
> 
> Xilinx has an out of tree implementation that can be used as a
> starting point. Work will need to be done on top of this to prepare it
> for upstream submission and to ensure the implementation is more
> generic.
> 
> This will mostly involve extending GDB server to tell GDB about
> different architectures and then allow the user to swap between them.
> 
> The Xilinx implementation can be seen here:
> https://github.com/Xilinx/qemu/blob/master/gdbstub.c
> There has been some steps in preparing the work to go upstream, which
> can be seen here:
> https://github.com/Xilinx/qemu/tree/mainline/alistair/gdb

I agree this is interesting.  Another related idea is to resume the
multi-arch work that Peter Crosthwaite was working on before he left Xilinx.

Paolo

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