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Feature #10893

Need support for new Cascade Lake Instructions

Added by Robert Mustacchi 7 months ago. Updated 7 months ago.

Status:
Closed
Priority:
Normal
Category:
kernel
Start date:
Due date:
% Done:

100%

Estimated time:
Difficulty:
Medium
Tags:

Description

Cascade Lake adds support for a new set of instruction enhancements called AVX512 VNNI. This adds four instructions:

  • VPDPBUSD
  • VPDPBUSDS
  • VPDPWSSD
  • VPDPWSSDS

These are all contained by their own CPUID bit. This should be plumbed up through isainfo and the aux vector.

History

#1

Updated by Robert Mustacchi 7 months ago

I tested the dis tests with a newer and older gas and verifying that they all completed successfully. I then booted this on a Cascade Lake system and verified that we saw the new bit in isainfo, pauxv, etc.

#2

Updated by Electric Monk 7 months ago

  • Status changed from New to Closed

git commit e4f6ce7088a7dd335b9edf4774325f888692e5fb

commit  e4f6ce7088a7dd335b9edf4774325f888692e5fb
Author: Robert Mustacchi <rm@joyent.com>
Date:   2019-05-04T15:16:05.000Z

    10893 Need support for new Cascade Lake Instructions
    Reviewed by: Hans Rosenfeld <hans.rosenfeld@joyent.com>
    Reviewed by: Dan McDonald <danmcd@joyent.com>
    Reviewed by: Richard Lowe <richlowe@richlowe.net>
    Approved by: Gordon Ross <gwr@nexenta.com>

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