Hello, On Sat, 6 Jan 2018 07:33:50 +0000 m...@netbsd.org wrote:
> Loongson-2 had an issue where from branch prediction it would prefetch > instructions from the I/O area and deadlock. > > This happened in normal usage so we build the kernel with a binutils > flag to output different jumps and flush the BTB on kernel entry.* I remember when we added support for those flags to our gcc & binutils. > I wouldn't count on MIPS CPUs to hold under the same level of scrutiny > as x86 CPUs, luckily they're pretty obscure (and most probably aren't > speculative). Yeah, I doubt there are a lot of IRIX servers left, and embedded MIPS is probably safe ;) have fun Michael