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#riscv

12 posts8 participants2 posts today

Good luck to the #CHERI folks at the #RISCV summit this week trying to convince the architecture review board not to mandate a specific capability format in the Y base architecture!

It would be a real shame to standardise a base architecture that is incompatible with accelerators, microcontrollers, or future versions of a Linux-capable system with a richer set of permissions. The Y base should be like the I base: not a stand-alone set of everything you need to build a usable system, but the common subset that every system needs. I hope you can persuade the RISC-V folks that new base architectures should respect the same principles as existing ones.

After some difficulty, I seem to have Ubuntu Desktop RISC-V running under qemu.

(the difficulty wasn't RISC-V itself, it's the mouse support under qemu, I've only been able to get it to work under a Wayland host, with fractional scaling disabled, with the guest window at 100% zoom, and with some extra command-line options).

In Google Summer of Code 2025 there is a proposal to optimize the open-source AV1 decoder (dav1d) for the RISC-V Vector (RVV) ISA by implementing Vector-Length Agnostic (VLA) intrinsic.
summerofcode.withgoogle.com/pr

dav1d is a new open-source AV1 decoder developed by the VideoLAN and FFmpeg
videolan.org/projects/dav1d.ht

RISC-V is an open standard Instruction Set Architecture (ISA) enabling a new era of processor innovation through open collaboration.
riscv.org/

Replied to jbz

@jbz >It was Intel grant money, Patterson happily admits, that paid for the Berkeley architects to invent RISC-V in the first place. Without closed source, proprietary Big Tech, there’s no open source, free-for-all Little Tech. Don’t listen to the techno-hippies who claim otherwise; that’s always been the case.

Perhaps. But it doesn't *have* to be that way :) There are alternatives to finance capital. And even it traces much of its sustenance to generous state backing, something China seems to have learned and that the USA seems to have forgotten (if the anemic CHIPS act in the US is anything to go by).

Angelina Jolie Was Right About Computers | WIRED

「 China’s top scientists have heralded RISC-V as a path to silicon independence. India just used RISC-V to make its first homemade microprocessor. Name a country; it’s probably experimenting with RISC-V. Brazil sent a record 25 delegates to the RISC-V summit 」

wired.com/story/angelina-jolie

WIRED · RISC Architecture Really Did Change EverythingBy Jason Kehe
Replied in thread
I am looking for an alternative without disruptive and distracting advertising that our students could use for a long time, and I am happy that we can test the alternative you provide. I had become angry many times when I needed to check/scan my or my colleague's previous lecture recording to follow with the next one fluently and have been forced to wait for three or five seconds after three seekings from the four. Thanks for your PeerTube setup. We will see if it will be appreciated by our students and the worldwide community, which uses #riscv for teaching. But in the long term, solutions backed by some stronger provider as is #cesnet are necessary for some wider use. I have seen that foreign universities use https://en.wikipedia.org/wiki/Kaltura, but may it be PeerTube can prove to be better choice.
en.wikipedia.orgKaltura - Wikipedia

The B35APO Computer Architectures course based on #riscv and our #qtrvsim simulator reached new (re)usability level, updated slides in the LaTeX Beamer format for lecture 1 to 10 are translated to English, PDF, CC-BY-SA Slide Sources at #cvut FEE GitLab and on GitHub. The feedback, corrections, suggestion, reuse and cooperation are welcomed. The lectures recording are available on community driven PeerTube server https://vhsky.cz/w/p/8Ejstt3Tfh8mWGcjQcEL2S and CTU FEE B35APO YouTube List. The online site with links to more related courses and on-line QtRvSim WASM application https://comparch.edu.cvut.cz/ allows even online evaluation of simple #riscv assembly and C exercises.

Here is the desktop set up on the Mango Pi Pro #RISCV #SBC. As mentioned earlier it is running minimal #LXDE on top of a vanilla install of #Ubuntu server 24.10.

I have peeled back a few things, such as audio since the basic Ubuntu install does not have the stuff to run #HDMI #audio (I could do look into this more but eh). I will do some more tinkering with the ISO from the official Mango Pi website. Lets see how that goes 🤞