> > We have this [1]: > > > > if (fpu_state_size_dynamic()) > > mask &= (header.xfeatures | xinit->header.xcomp_bv); > > > > If header.xfeatures[18] = 0 then mask[18] = 0 because > > xinit->header.xcomp_bv[18] = 0. Then, it won't hit that code. So, I'm > > confused about the problem that you described here. > > Read the suggested changelog I wrote in my reply to Mingwei. > > TLDR: > > xsave.header.xfeatures[18] = 1 > xinit.header.xfeatures[18] = 0 > -> mask[18] = 1 > -> __raw_xsave_addr(xsave, 18) <- Success > -> __raw_xsave_addr(xinit, 18) <- WARN > > Thanks, > > tglx Hi Thomas, Thanks for the review and I will provide the next version separately from the series, since this one is independent from the rest. Chang: to reproduce this issue, you can simply run the amx_test in the kvm selftest directory. Thanks. -Mingwei
