Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1394762
| From | Dave Hansen <dave.hansen@intel.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v4 10/10] x86/xsaves: Re-enable XSAVES |
| Date | 2016-05-05 00:50 +0200 |
| Message-ID | <rvdMe-4aR-3@gated-at.bofh.it> (permalink) |
| References | <r92ut-2hO-1@gated-at.bofh.it> <r92uv-2hO-29@gated-at.bofh.it> <rvdMe-4aR-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 05/04/2016 03:41 PM, Dave Hansen wrote: > But, since we *always* call XSAVES with an instruction mask of -1 and > end up with a requested feature bitmap (RFBM) equal to XCR0, I think we > can do a shortcut because we'll practically *always* have an > xcomp_bv==RFBM==XCR0, which means that all (present) components will > always have an address. Actually, we depend on that anyway. xstate_comp_offsets[] is completely bogus if we don't have xcomp_bv==RFBM==XCR0. Perhaps we need to add those checks anyway.
Back to linux.kernel | Previous | Next | Find similar | Unroll thread
Re: [PATCH v4 10/10] x86/xsaves: Re-enable XSAVES Dave Hansen <dave.hansen@intel.com> - 2016-05-05 00:50 +0200
csiph-web