On 9/17/21 6:04 PM, Warner Losh wrote:> wrt FreeBSD: > > The main focus of the project is on AMD64 (x86_64) and ARM64 (aarc64). With > ricsv64 being ascendant as well. i386 and armv7 are fading. ppc64 has > strong, > but episodic, interest as well. The rest are bit players. > > i386 (i686 really), armv7 and riscv7 are the next tier of interest in > FreeBSD > land. i386 is confined to 32-bit VMs with only a few legacy hardware > deployments > still kicking. armv7 is more popular on embedded boards, some of which have > a need to run qemu.
What part of QEMU is used there, user-emulation (likely IMO) or system-emulation (unlikely) or both? > riscv64 has a rust port that's being upstreamed, but not > there yet and there's likely interest to run qemu on it for research > projects. > riscv64 isn't widely deployed but has a lot of developer interest / > mindshare. > sparc64 was removed from FreeBSD 13 and has been irrelevant for years. > ppc 32 bit has some minor interest. mips has been fading fast and stands > an excellent chance of being removed before FreeBSD 14 (which is currently > slated for 2022). PowerPC 64 is hard to talk about... there's interest > that comes > and goes, but when it's around, it's quite intense. It's quite likely > there will > be interest to run qemu on ppc64 on FreeBSD, but that's much less certain. > > So it all depends on what having rust means for those platforms that > don't have > it. Would it be a 'half a loaf' situation where the non-rust bits would > be buildable > but cool new drivers written in rust won't be? Or will it be so central > that rust is > table stakes to even start a qemu build? To be honest, I'm not sure this > difference > would greatly affect the above answer :). > > Rust works really well on x86_64 and aarch64 (though there's more often > a lag > on the latter of a few weeks). I know of a rust riscv64 port, but that's > just getting > ready to upstream. No first-hand or second-hand clue on the rest. > > FreeBSD tl;dr: x86_64 and aarch64 are must have. i386, armv7 and riscv64 are > really nice to have. ppc64 might also be in that list, but that's less > certain. The rest > have little to no relevance. Thanks for gathering this useful info! > P.S I've been poking at people to get our QEMU aarch64 CI story in better > shape than it is today... I'll have to continue to prompt those > interested... >
