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MF64997 - LIC Spectre and Meltdown speculation barrier functions

PTF ( Program Temporary Fixes ) Cover letter


Order this fix

Abstract

LIC Spectre and Meltdown speculation barrier functions


Pre/Co-Requisite PTF / Fix List

REQ  LICENSED           PTF/FIX  LEVEL

TYPE PROGRAM  RELEASE   NUMBER   MIN/MAX  OPTION
---- -------- --------- -------  -------  ------
PRE  5770999  V7R3M0    MF65234   00/00    0000
PRE  5770999  V7R3M0    MF64430   00/00    0000
PRE  5770999  V7R3M0    MF64597   00/00    0000
PRE  5770999  V7R3M0    MF64551   00/00    0000



NOTICE:
-------
Application of this PTF may disable or render ineffective programs that
use system memory addresses not generated by the IBM translator,
including programs that circumvent control technology designed to limit
interactive capacity to purchased levels.  This PTF may be a prerequisite
for future PTFs.  By applying this PTF you authorize and agree to the
foregoing.

This PTF is subject to the terms of the 'IBM License Agreement for Machine
Code', the terms of which were provided in a printed document that was
delivered with the machine.

SUBJECT TO ANY WARRANTIES WHICH CAN NOT BE EXCLUDED OR EXCEPT AS EXPLICITLY
AGREED TO IN THE APPLICABLE LICENSE AGREEMENT OR AN APPLICABLE SUPPORT
AGREEMENT, IBM MAKES NO WARRANTIES OR CONDITIONS EITHER EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OR CONDITIONS OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON INFRINGEMENT,
REGARDING THE PTF.





APAR Error Description / Circumvention

-----------------------------------------------
IBM has released this PTF in response to CVE-2017-5753,
CVE-2017-5715, CVE-2017-5754, and CVE-2018-3639.

CORRECTION FOR APAR MA47093 :
-----------------------------
The Licensed Internal Code will be updated to support customer
callable functions that can be used to help mitigate
Spectre/Meltdown vulnerabilities.  The new functions can be
called using the SYNCSTG machine interface instruction and
provide barriers against hardware speculation.  If a program
that uses any of these new capabilities is moved to a different
system, the target system must include all the latest
Spectre/Meltdown PTFs and firmware patches.  Failure to do so
may result in one of the following:

1. Failure to provide any machine speculation protection.

2. Failure to provide an application barrier.

3. MSGMCH6801, type=1, may be generated when the program runs.

4. MSGMCH4245, reason code 3, or MSGMCH4227, reason code 7, may
be generated when the program is created or converted.

5. MSGCPF3888 may be generated if a program is restored and
program conversion is needed.

See the IBM i Security Bulletin for a list of all previously
released PTFs and firmware patches needed to mitigate
Spectre/Meltdown vulnerabilities:

www.ibm.com/support/docview.wss?uid=nas8N1022433

CIRCUMVENTION FOR APAR MA47093 :
--------------------------------
None.


Activation Instructions


None.




Special Instructions


None.


Default Instructions

THIS IS A DELAYED PTF TO BE APPLIED AT IPL TIME.



Supersedes

PTF/FIX NO(S).  APAR TITLE LINE
--------------  ------------------------------------------------------------
   MF64984      LIC MITIGATE SPECTRE AND MELTDOWN VULNERABILITIES
   MF64695      LIC MITIGATE SPECTRE AND MELTDOWN VULNERABILITIES
   MF64600      LIC MITIGATE SPECTRE AND MELTDOWN VULNERABILITIES
   MF64568      LIC MITIGATE SPECTRE AND MELTDOWN VULNERABILITIES

Summary Information

System.............................. i
Models..............................
Release............................. V7R3M0
Licensed Program............... 5770999
APAR Fixed.......................... MA47093
Superseded by:...................... View fix details for PTF MF65320
Recompile........................... N
Library............................. QSYS
MRI Feature ........................ NONE
Cum Level........................... C9116730


System i Support

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Document information

More support for: i family

Software version: V7R3M0

Operating system(s): OS/400

Reference #: MF64997

Modified date: 12 September 2018