Re: GRUB 2.12 release, etc.

[Xiaotian Wu]

在 2022/6/30 下午9:12, Daniel Kiper 写道:

> On Tue, Jun 14, 2022 at 11:30:47AM -0500, Glenn Washburn wrote:
> > On Tue, 14 Jun 2022 17:48:39 +0800
> > Xiaotian Wu <wuxiaotian@loongson.cn> wrote:
> >
> > > Hi Daniel.
> > >
> > > Thank you for your release plan.
> > >
> > > I would like to ask, can GRUB-2.12 add a new LoongArch architecture support?
> > >
> > > LoongArch is a RISC instruction set from China. Currently, Linux-5.19
> > > adds LoongArch CPU support and will support complete EFIStub in version
> > > 5.20.
> > >
> > > On GRUB, including 2 patch sets:
> > >
> > > 1. Add the basic support of LoongArch so that GRUB can run on the
> > > LoongArch machine. See
> > > https://github.com/loongarch64/grub/tree/dev/patchwork/base
> > >
> > > 2. Add the loader for kernel, but it depends on a series of patch of
> > > Loadfile2. See https://github.com/loongarch64/grub/tree/dev/patchwork/efi
> > >
> > > These patchs are already available, and tested on CLFS and Archlinux for
> > > LoongArch.
> > >
> > > If we plan to support LoongArch in GRUB-2.12, I will update these patchs
> > > and release the 4th version of the patch for review.
> > >         
> > I think it would be great to have LoongArch in GRUB. It should be a hard
> > requirement that support for the architecture be added for the make
> > check tests. This will require that QEMU have support for LoongArch. It
> > looks like the current release of QEMU does not have support for
> > LoongArch, but there is a patch series[1] which adds it. I presume that
> >       
> What is the status of this patch series right now? If it is in or close
> by I would ask for at least minimal tests for the LoongArch support in
> the GRUB.
>

These patchs can be worked, and I just sent the V4 version of the patch to the email list.

About the QEMU, we have maintained a branch[1] to generate qemu-system-loongarch64, but there are still some jobs that are not completed. The expected result is to add it to QEMU-7.1.

I have added related tests in the patch of the second part[2], but because the QEMU work is not completed, it cannot pass the all testcase, although it works well on the physical machine.

    [1] https://github.com/loongson/qemu/tree/tcg-full-system

[2] https://github.com/loongarch64/grub/commit/fe92204a681d9d550b724bd9fdc31971eebc77e0

> > will get accepted at some point. I'd suggest the tests be made assuming
> > that (or some other patch LoongArch patch series) will get accepted.
> > The INSTALL file can be updated to indicate that QEMU > 7 is required,
> > or something like that. Also, if there's any special build requirements
> > those should also be noted in the INSTALL file and docs/grub*.texi
> > should be updated for the new arch. For example, what's the minimum GCC
> > version needed to compile?
> >       
> Yeah, that would be nice if INSTALL file is updated too.
>
> Daniel
>
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