Hi! Its interesting thing. Is there a possibility to get LoongArch hw outside of China?
В письме от суббота, 1 января 2022 г. 20:28:16 MSK пользователь WANG Xuerui написал: > Hi everyone, > > I'm the guy who previously announced the Gentoo/LoongArch port [1]; > since that post, some nice progress has been made, and here's a heads-up > and a procedural question regarding how to continue work upstream. > > > ## Progress of the port > > After some minimal forking and tweaking, it's already possible to build > working stage3 tarballs with catalyst; > with quick-and-dirty catalyst[2] and genkernel[3] patches, even working > installation CDs can be built (confirmed by LiveUSB-making and booting > on real 3A5000 hardware). > The built stages and installation CD images are already available in > several mirrors like [4] or [5]. > > The toolchain development of Loongson has gone more-or-less quiet > lately, and many projects (eselect, icu, systemd, etc.) have already had > releases that contain LoongArch bring-up changes, so it's time to push > more things upstream (in this case, the main gentoo.git repo). > > > ## How to test this? > > The necessary changes are all brewing in the loongson-overlay[6], which > is available via layman (`sudo layman -a loongson`). You'll need this > for the loong profile and toolchain patches. > > The stages can be tested with QEMU linux-user emulation, if you don't > have the LoongArch hardware; > but the LoongArch target is not upstream yet, so you'll have to compile > Loongson's fork ([7]; qemu-devel threads [8] [9]) yourself. The > necessary binfmt-misc declaration is like this (remove all whitespaces > > and newlines before using): > > :loongarch64:M:: > > \x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x02\x01: > > \xff\xff\xff\xff\xff\xff\xff\xfc\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff > > > \xff\xff:/usr/local/bin/qemu-loongarch64: > You can use your favorite way to set up this (manually, via rc-scripts, > via systemd-binfmt.service, whatever), replacing the interpreter path to > suit your setup, then just proceed like every chroot. > > Inside the chroot, you need to `git clone` the loongson-overlay, add it > to /etc/portage/repos.conf, and fix the profile symlink; after that you > should be able to emerge packages as usual. Keywords are mostly missing, > so you may use ACCEPT_KEYWORDS=~riscv or something similar to get > through, in case everything is masked and not package.accept_keywords-ed. > > Note that their system emulation is currently in a worse state than > linux-user (horribly slow and dependent on prebuilt firmware blob), > according to review comments, so you may as well ignore the installation > CDs for now. > > > ## Problem regarding further upstream work > > As described above, there is already some nice progress, but a > procedural problem still remains: every new architecture needs a backing > project and arch team [10], yet I'm not a Gentoo dev and it's unclear if > any Gentoo dev would be interested in such a niche architecture with > limited hardware availability outside China, so we may get stuck in this > state for an extended period. > > Any suggestion is welcome; and thank you for your attention. > > > Regards, > WANG "xen0n" Xuerui > > > [1]: > https://archives.gentoo.org/gentoo-dev/message/ef0b1812e9b66cdf5978ecc2ad4ed > a4e [2]: https://github.com/xen0n/catalyst/tree/3.0.20-for-loong > [3]: https://github.com/xen0n/genkernel/tree/loong > [4]: https://mirrors.tuna.tsinghua.edu.cn/loongson/gentoo/experimental/ > [5]: https://mirrors.bfsu.edu.cn/loongson/gentoo/experimental/ > [6]: https://github.com/xen0n/loongson-overlay > [7]: https://github.com/loongson/qemu/tree/tcg-dev > [8]: > https://patchew.org/QEMU/1638610165-15036-1-git-send-email-gaosong@loongson. > cn/ [9]: > https://patchew.org/QEMU/1638619645-11283-1-git-send-email-yangxiaojuan@loon > gson.cn/ [10]: > https://projects.gentoo.org/council/meeting-logs/20180114-summary.txt -- Best regards, Alexey 'Alexxy' Shvetsov
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