On Fri, Aug 18, 2023 at 06:44:48AM +0200, Peter J. Philipp wrote: > On Thu, Aug 17, 2023 at 06:03:42PM +0000, Mike Larkin wrote: > > On Sun, Aug 13, 2023 at 06:27:20PM +0200, Peter J. Philipp wrote: > > > Hi, > > > > > > I was wondering two things currently, both having to do with QEMU on > > > OpenBSD. > > > > > > I noticed in my QEMU that is running OpenBSD that it is supporting the > > > H-extension. The H is hypervisor. Does this mean that there is support > > > emulated for hypervisor host and guest in QEMU? Also is there any > > > efforts to > > > implement this where I can be an observer? > > > > I believe they have some support for that. > > > > There is no hardware currently available that has it though, from what I > > know. > > There is an FPGA core you can implement on a suitably large dev board > > though, > > but you'd be a 1-off. > > > > When you say "implement this", what do you mean? > > Oh I didn't know there was no hardware support for this yet. What I meant > for implementing this was if there is anyone porting vmm to riscv64. I guess > arm64 needs it too but riscv64 to me is the ultimate :-). >
arm64 is first but the separation work was done already. There are about two dozen functions that need to be implemented in the kernel, plus a bunch of work in vmd. > I was wondering Mike, do you offer any more workgroups like the one that > ported riscv64? I know someone on IRC who lives in the Los Angeles region of It wasn't a workgroup. It was a group of four full time students working on their master's degrees as a final project. It took six months, more or less, and at that time we barely could print hello world from userland. It was another 6-12 months after that before it was stable, thanks to many other developers. > California that might be interested in such a workgroup. Though he may > not be available until 2024/2025 for something such as this, but the interest > would be there. I told him an effort to port vmm to riscv64 would be a > worthwhile endeavour, for everyone. Obviously it depends on hardware support > and someone to guide the group. > I'm prioritizing arm64 at this point, there isn't much value in porting vmm to hardware that is way too slow to matter (and I am unsure if such hardware even exists). powerpc64 is another choice, it has virtualization support, as do some octeons. We have real hardware for those, too. That said, if a diff appeared on tech@, I'd certainly take a look at it. > > > > > > > I saw somewhere that newer QEMU support RV128 cpu emulation. While this > > > is something for 20 years from now perhaps, I'm still curious if anyone is > > > considering a port to the RV128, or is at least turned on by the thought > > > of it. > > > > no > > > > > Unfortunately I believe the RV128 isn't intended for an 128 bit address > > > space > > > but has something planned for partitioning it in half so it will be 64 bit > > > space. With the other 64 bit for something security related. > > > > > > Also I'd like to say that I have my first piece of RV64 hardware for a few > > > weeks now and it can run linux ubuntu. It's a Mango Pi which is the same > > > form factor as a RPI zero. I also donated one to a developer so perhaps > > > we'll > > > see OpenBSD running on it one day. In half a dozen weeks or so I'm > > > considering > > > getting my second RV64 computer, which will be somewhat of a visionfive > > > 2-like > > > SBC for a router. Not sure which yet, though, let's see who can deliver > > > in > > > October. > > > > > > Next year I'd like to invest into a larger RV64 computer for workstation. > > > As > > > you can see I'm starting to get a bit serious around Risc-V > > > > get a milk-v pioneer then, it's the biggest you can currently buy. > > Interesting. Thanks! > > Best Regards, > -peter > > -- > Over thirty years experience on Unix-like Operating Systems starting with QNX.
