On Fri, Feb 02, 2018 at 12:11:18AM +0000, Ken Moffat wrote: > On Thu, Feb 01, 2018 at 01:52:46PM -0800, Paul Rogers wrote: > > > If anybody wants to add full retpoline mitigation (against Spectre > > > v2) to an older system, the following works on x86_64 (I no longer > > > have i686 systems to test on). > > > > Thank you, Ken. I do. I can try it. I'll report back when I have > > information. I haven't seen any indications yet that the 4.4 & 4.9 kernel > > patches install PTI on i686 builds. > > > > The i686 patches for that are still being developed, hopefully at > some point they might be ready for a 4.15-rc, and after that get
I must be living in the past. I meant they might be ready for a 4.16-rc. > backported to 4.14 and perhaps to 4.9, 4.4 (depending on how has > changed). Best to read that as "in early development". > > > Also, perhaps you can clarify: The latest kernel patches for 4.4 & 4.9 use > > retpoline. Clearly we *want* both, but I'm confused about whether each > > offers any mitigation on its own? > > > > PTI offers mitigation against Meltdown, retpoline against Spectre > v2. > > And by the time there are mitigations for Spectre v1 (currently, > considerations seem to be particularly focussed on cloud providers > with heterogenous environments, where a VM can be migrated to a > newer, or older, machine - but I guess the attacks are more likely > against VMs shared hosts). > > So again, don't hold your breathe. > > Looks like this will be a fun year, for some definition of fun. > > ĸen > -- > Truth, in front of her huge walk-in wardrobe, selected black leather > boots with stiletto heels for such a barefaced truth. > - Unseen Academicals > -- > http://lists.linuxfromscratch.org/listinfo/lfs-support > FAQ: http://www.linuxfromscratch.org/blfs/faq.html > Unsubscribe: See the above information page > > Do not top post on this list. > > A: Because it messes up the order in which people normally read text. > Q: Why is top-posting such a bad thing? > A: Top-posting. > Q: What is the most annoying thing in e-mail? > > http://en.wikipedia.org/wiki/Posting_style -- Truth, in front of her huge walk-in wardrobe, selected black leather boots with stiletto heels for such a barefaced truth. - Unseen Academicals -- http://lists.linuxfromscratch.org/listinfo/lfs-support FAQ: http://www.linuxfromscratch.org/blfs/faq.html Unsubscribe: See the above information page Do not top post on this list. A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail? http://en.wikipedia.org/wiki/Posting_style
