On Wed, Aug 13, 2025 at 4:37 PM Simon Chopin <simon.cho...@canonical.com> wrote: > > On mer. 13 août 2025 09:04:22, Aaron Rainbolt wrote: > > On Wed, Aug 13, 2025 at 7:39 AM Simon Chopin <simon.cho...@canonical.com> > > wrote: > [snip] > > > Now, if I'm wrong about lack of major breakage, you want to watch out > > > for the following symptoms in your autopkgtests, build logs, or bug > > > reports: > > > > > > * FTBFS due to missing termio.h > > > Your package is using some really outdated interfaces that were > > > already obsolete when the Berlin Wall fell. Please look into > > > termios.h. > > > * ARM issues only on modern ARM64 processors (e.g. Apple M4), around > > > coroutine > > > or exception-handling code. Tobias, do we even support running on M4 > > > hardware!? > > > > Does "M4 hardware" mean running directly on Apple's M4 CPU bare metal, > > or does it also include running inside a virtual machine under > > Parallels, VMware Fusion, UTM, etc.? If this is a problem inside > > virtual machines, I personally don't think that would be acceptable. > > If it's a baremetal-only issue, then meh, probably not that big of a > > deal. Just my 2 cents on the matter. > > Don't worry too much about this. I'm not saying those systems are > broken, just that *if* you see issues looking like that on those systems > then this upload might be the cause. > > The details are a bit beyond my knowledge, but basically the SME matrix > storage is disabled when calling setjmp() for consistency with > longjmp(). It's unlikely to affect Ubuntu since we don't generate those > opcodes by default and even then, why would you call setjmp() in the > middle of matrix operations, but OTOH it's the kind of thing that's a > nightmare to debug, which is why I figured I would mention it. > > As to whether or not your VMs are affected, I wouldn't know. Check > /proc/cpuinfo to see if you have SME in your VM?
No native Linux support for M3+ at the moment but I would expect it to be available in QEMU VMs on newer apple machines and that has probably a notable user base. It doesn't sound like a particularly common bug to hit as you said though. > > Cheers, > Simon > -- > ubuntu-devel mailing list > ubuntu-devel@lists.ubuntu.com > Modify settings or unsubscribe at: > https://lists.ubuntu.com/mailman/listinfo/ubuntu-devel -- ubuntu-devel mailing list ubuntu-devel@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-devel
