Hi, On 2022-10-04 08:51, Aurelien Jarno wrote: > Hi > > On 2022-09-25 13:43, Aurelien Jarno wrote: > > > Running a quick diff against old procinfo reveals that "flags" has the > > > following new entries now: > > > > > > tsc_deadline_timer ssbd ibrs ibpb stibp bmi1 bmi2 md_clear flush_l1d > > > > > > > it looks like that the BMI2 > > > > instructions support has been added in a microcode update > > > > > > As such it does appear that indeed this is the case. > > > > Thanks for the confirmation, it seems that the microcode update is also > > useful for security reasons in order to mitigate the speculative > > execution side channel issues (the famous spectre/meltdown). > > > > Neverthless the AVX2 code should not use BMI2 instructions if they are > > not available. > > This has been fixed upstream and in the sid package. Next step is to get > it fixed for stable.
Please find a test version here for people who have the possibility to try: https://people.debian.org/~aurel32/glibc/ Regards Aurelien -- Aurelien Jarno GPG: 4096R/1DDD8C9B aurel...@aurel32.net http://www.aurel32.net
signature.asc
Description: PGP signature
