On June 15, 2018 2:14:50 PM UTC, Yu-cheng Yu <yu-cheng.yu@xxxxxxxxx> wrote: >On Fri, 2018-06-15 at 14:11 +0200, Julian Stecklina wrote: >> Yu, >> >> Regarding your patch to disable AVX with eager fpu disabled in the >4.4 >> stable queue: >> >> >https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/queue-4.4/x86-fpu-disable-mpx-when-eagerfpu-is-off.patch >> >> Why would this be necessary? In the Intel SDM Vol 2, Chapter 2.4, >> FPU/SIMD instructions are grouped into different classes and for all >of >> them CR0.TS triggers a #NM exception in all modes but real mode and >> virtual 8086 mode. >> >> It seems to me lazy context switching of AVX is perfectly functional >> (disregarding the recently disclosed security issue). Am I missing >> something? >> >> Julian > >This is for MPX, not AVX. Wrong link. There was another one for AVX, but I saw it got reverted. Nevermind then. ;) Julian
