Re: [PATCH v2 0/5] Minimal build for RISCV

[Connor Davis <connojdavis@xxxxxxxxx>]

On 5/13/21 10:43 PM, Alistair Francis wrote:
> On Fri, May 14, 2021 at 2:18 PM Connor Davis <connojdavis@xxxxxxxxx> wrote:
> > Hi all,
> >
> > This series introduces a minimal build for RISCV. It is based on Bobby's
> > previous work from last year[0]. I have worked to rebase onto current Xen,
> > as well as update the various header files borrowed from Linux.
> >
> > This series provides the patches necessary to get a minimal build
> > working. The build is "minimal" in the sense that 1) it uses a
> > minimal config and 2) files, functions, and variables are included if
> > and only if they are required for a successful build based on the
> > config. It doesn't run at all, as the functions just have stub
> > implementations.
> >
> > My hope is that this can serve as a useful example for future ports as
> > well as inform the community of exactly what is imposed by common code
> > onto new architectures.
> >
> > The first 3 patches are mods to non-RISCV bits that enable building a
> > config with:
> >
> >    !CONFIG_HAS_NS16550
> >    !CONFIG_HAS_PASSTHROUGH
> >    !CONFIG_GRANT_TABLE
> >
> > respectively. The fourth patch adds the RISCV files, and the last patch
> > adds a docker container for doing the build. To build from the docker
> > container (after creating it locally), you can run the following:
> >
> >    $ make XEN_TARGET_ARCH=riscv64 SUBSYSTEMS=xen
> >
> > The sources taken from Linux are documented in arch/riscv/README.sources.
> > There were also some files copied from arm:
> >
> >    asm-arm/softirq.h
> >    asm-arm/random.h
> >    asm-arm/nospec.h
> >    asm-arm/numa.h
> >    asm-arm/p2m.h
> >    asm-arm/delay.h
> >    asm-arm/debugger.h
> >    asm-arm/desc.h
> >    asm-arm/guest_access.h
> >    asm-arm/hardirq.h
> >    lib/find_next_bit.c
> >
> > I imagine some of these will want some consolidation, but I put them
> > under the respective RISCV directories for now.
> Awesome!
>
> Do you have a public branch I could pull these from to try out?
>
> Alistair
Yes you can find the latest here: 
https://gitlab.com/connojd/xen/-/commits/riscv-build

Thanks,

Connor