>> Does an update to the Kernel, 4.9.77 and 4.14.14 need to be made to >> properly address this? There are fixes to mitigate Spectre.
As far as I know, to properly mitigate spectre variant 2, it requires update to microcode along w/ kernel support for IBRS. However, IBRS feature was just committed to the mainline on Jan 4th (ref. https://lwn.net/Articles/743019/ ), so it is most likely not supported by in other LTS branches yet. Spectre variant 1 is a bigger headache because it requires recompilation of linux kernel and all libraries w/ lfence feature. On Fri, Jan 19, 2018 at 4:05 AM, Lucian Cristian <l...@createc.ro> wrote: > On 19.01.2018 00:41, Zoltan HERPAI wrote: > >> >> >> On Thu, 18 Jan 2018, Hauke Mehrtens wrote: >> >> On 01/18/2018 01:51 PM, Nick Lowe wrote: >>> >>>> Does an update to the Kernel, 4.9.77 and 4.14.14 need to be made to >>>> properly address this? There are fixes to mitigate Spectre. >>>> >>> >>> We even need a patch for GCC which will be in GCC 8 and 7.3. >>> For master we should backport it to GCC 5.5, but what do we want to do >>> with 17.01 and 15.05 ? >>> >> >> I'll speak only of CC - there is no microcode updater in it at all, so >> while 3.18 contains partial patches and GCC 4.8 is unlikely to get fixed, >> we should add this facility into it anyway. >> >> The AMD microcoded updater needs at least kernel 4.15, 4.14.13, 4.9.76, >>> 4.4.111 which we already have. >>> >> >> That's only for the fam17h (Zen) CPUs, earlier CPU types should work with >> earlier kernels, and this can likely be backported into 3.18. (I don't have >> a Zen-based box to test, hands up whoever has one.) >> >> Regards, >> -w- >> _______________________________________________ >> openwrt-devel mailing list >> openwrt-devel@lists.openwrt.org >> https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel >> > > I do have an R5 1600, but can't test until Monday night > > > Regards > > _______________________________________________ > openwrt-devel mailing list > openwrt-devel@lists.openwrt.org > https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel >
_______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
