Hello,
Am 2018-01-11 um 11:58 schrieb Henrique de Moraes Holschuh: > On Thu, 11 Jan 2018, Frank Nord wrote: >> I've problems applying this on my mac mini (Intel(R) Core(TM) 2 Duo CPU, >> P7550 @ 2.6 GHz). >> 3.20170707.1~deb9u1 from stretch. What's the recommended >> microcode-version for this kernel? > > The one you have is currently fine. Intel has not published > Spectre-related microcode mitigation for the Core 2 duo, at least not > yet. > > Maybe they will update the Core2 duo, maybe they will not... It is a > very old model, the microcode might not have enough control there to do > it without disabling way way too much stuff (and thus incurring an > absurd performance regression). > > When the microcode doesn't have the Spectre mitigation support for > whatever reason (or you opt to not use it because it is too slow, etc), > "retpoline" software mitigation should do the job just fine to protect > against the currently known variants of spectre. > > However, retpoline support is not ready yet. It is being worked on the > kernel upstream, and it requires compiler support, too... which is also > being worked at gcc and clang upstream. > > We have a couple interesting weeks ahead of us, with lots of -security > and stable updates to do :p Thanks for your help - that's interesting. Getting back to my original question: Shall I file a bug report for deb9u2 not being able to boot my P7550 (in contrast to deb9u1) or is it known anyway? Greetings, Frank
