intel

[HPC, KNM][Xen] avx512_4vnniw, avx512_4fmaps enabling

Bug #1674587 reported by quanxian
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
intel
Fix Released
Undecided
Unassigned
xen (Ubuntu)
Fix Released
Undecided
Stefan Bader

Bug Description

Description:
  Pass feature bits CPUID:eax=7:ecx=0->edx[2:3] of new avx512_4vnniw,
  avx512_4fmaps instruction sets to guests. The features enables new
  instructions which are described in Intel's Instruction Set Extensions
  Programming Reference v26.

  Business case (Partner benefit):
  Intel: New features bits visible in guest on KNM. Needed for KNM kernel
  enabling for future SLES12SP3 customers.

The patch is under the link: http://markmail.org/message/q3mfwqdkexy2akcj
commit
  a0b4216179359ea48748a384fbad5fd080b15bad in Xen-4.9

Revision history for this message
quanxian (quanxian-wang) wrote :

need cherry pick?

Revision history for this message
Robert Hooker (sarvatt) wrote :

xen (4.8.0-1ubuntu3) zesty; urgency=medium

  * Cherry-pick AVX512_4VNNIW and AVX512_4FMAPS support from Xen 4.9
    (LP: #1674587)

 -- Robert Hooker <email address hidden> Thu, 23 Mar 2017 10:58:10 -0400

information type: Proprietary → Public
Revision history for this message
Robert Hooker (sarvatt) wrote :

I spoke to the Xen mantainer and it is too late for this feature to make it into 17.04, we will have to delay until 17.10.

Revision history for this message
Leann Ogasawara (leannogasawara) wrote :

Assigning to Stefan Bader to consider for 17.10

Changed in xen (Ubuntu):
assignee: nobody → Stefan Bader (smb)
Revision history for this message
quanxian (quanxian-wang) wrote :

AVX512_4VNNIW and AVX512_4FMAPS
Xen commit id: a0b4216179359ea48748a384fbad5fd080b15bad
AVX512_VPOPCNTDQ
Xen commit id: bc1e0ea329ecc3235cf6718a1fb0d2c39b1fcf8a

Revision history for this message
quanxian (quanxian-wang) wrote :

It should be done after upgrading to Xen-4.9.

Revision history for this message
Paul Lai (pclai) wrote :

If memory serves, Xen 4.9 is in Artful.

Revision history for this message
Stefan Bader (smb) wrote :

Yes, Xen 4.9 has become available this week.

Changed in xen (Ubuntu):
status: New → Fix Released
Leann Ogasawara (leannogasawara)
Changed in intel:
status: New → Fix Released
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