On Tue, Mar 22, 2016 at 04:53:02AM -0600, Jan Beulich wrote: > >>> On 16.03.16 at 13:12, <shuai.r...@linux.intel.com> wrote: > > Don't you need to use xcomp_bv here? That's what "Extended > Region of an XSAVE Area" in SDM Vol 1 suggests to me. > "OPERATION OF XRSTORS" and "OPERATION OF XSAVES" in SDM Vol1.
For xsaves: "Execution of XSAVES performs the init optimization to reduce the amount of data written to memory." For xrstors: "XRSTORS updates state component i based on the value of bit i in the XSTATE_BV field of the XSAVE header". > > /* Set XSTATE_BV and XCOMP_BV. */ > > xsave->xsave_hdr.xstate_bv = xstate_bv; > > xsave->xsave_hdr.xcomp_bv = v->arch.xcr0_accum | > > XSTATE_COMPACTION_ENABLED; > > + setup_xstate_comp(xstate_comp_offsets, xstate_bv); > > Same here then I think. > > Jan > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xen.org > http://lists.xen.org/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
