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Update to ECPS:VM notes

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git-svn-id: file:///home/jj/hercules.svn/trunk@3653 956126f8-22a0-4046-8f4a-272fa8102e63
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Ivan Warren
2006-02-02 22:00:41 +00:00
parent dcb04e295e
commit 16a92ccabb
1 changed files with 9 additions and 7 deletions
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16
README.ECPSVM
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@@ -23,8 +23,8 @@ VM/SP 6 (with or without HPO option)
but rely on the SIE instruction to perform some of these functions.
A VM/SP Guest (or VM/370 Guest with 4K Storage key updates) running under
[z/]VM[/[XA|ESA]] can theorically use the VM and CP Assists. This implementation
is not finalized yet (see BUGS section)
[z/]VM[/[XA|ESA]] will NOT have access to either the CP assists or VM Assists.
The ECPS:VM Feature is disabled when running under SIE.
************************
@@ -156,12 +156,14 @@ VM Assists for MVS
*****************
BUGS & Caveats :
ECPS:VM Has not been tested in a AP/MP System.
My belief is that they WILL NOT WORK.
ECPS:VM Should be disabled if the system is MP or AP generated
ECPS:VM will NOT work in an AP or MP system. An AP or MP generated system
locks the control blocks being manipulated by the assisted functions
(VMBLOK, RDEVBLOK, VDEVBLOK, etc..). However, the current ECPS:VM
implementation doesn't lock any of those structures. Therefore, CP will
fairly quickly abend because it will find some of the control blocks
to not have been locked when they should (various LOKXXX abends).
For the time being, ECPS:VM Should be disabled on the host system when running VM/SP Under [z/]VM/[XA/ESA]
because ECPS:VM Under SIE is still not finalized
Consequently, ECPS:VM must be disabled when a AP or MP system is used.
*****************