On Sun, 06 Nov 2016, Adrian Bunk wrote: > On Sun, Nov 06, 2016 at 05:41:34PM -0200, Henrique de Moraes Holschuh wrote: > > On Sun, 06 Nov 2016, Ben Hutchings wrote: > > > It's worth noting that TSX is broken in 'Haswell' processors and is > > > supposed to be disabled via a microcode update. I don't know whether > > > glibc avoids using it on these processors if the microcode update is > > > not applied. (Linux doesn't appear to hide the feature flags.) > > > > It does avoid it. For glibc libpthreads, Debian has blacklisted Intel > > TSX use [in libpthreads] on all of Haswell and much of Broadwell. > > > > But anything else *will* attempt to use it, people query cpuid directly > > for these things. You need a hypervisor that filters cpuid(). > > All users who are using intel-microcode from non-free instead of running > outdated microcode with known errata should be OK here?
Last time I checked, it looked like an yes for Skylake as far as Intel TSX is concerned. I don't know about the other processors, such as Broadwell-E. -- Henrique Holschuh