In what I read, i didn't see any dependency on multiple cores, if so, it
would be dependent on what was running in the other core, if the kernel
didn't run there, no exposure.e
AFAICS, you try to read something you are not allowed to. speculative
execution does this, but then it gets canceled
I'm not sure whether I'm providing more of an answer or more of a question
- but ...
My understanding is that this "leakage" of data happens on the chip via
access to cache - certainly on a core, i.e. between two threads running on
the same core. I don't know about two different cores on the same
another stupid question.
This is ONLY for Linux on z, correct? and only within one Linux
instance? If 200 copies of Linux are running under one z/vm, the only
risk is within each of the Linux instances.
Meaning accounting running in Linux #1 is not at risk from anything else
running in any
Paul,
The answer is "yes". A MCL for hardware came out last week. I believe it
applies to models z14 down through z114. At least, our z13s, BC12 and z114
all received it. (We wanted it on as soon as possible.)
In addition, there is a z/VM PTF, though I'm not sure it is out yet. Its z/VM
6.4
You will not find answers here or in other social media. Please see the IBM Z
Security Portal for information.
Alan
Sent from my iPhone using IBM Verse
On Jan 15, 2018, 10:31:29 AM, dskw...@mindspring.com wrote:
From: dskw...@mindspring.com
To: LINUX-390@VM.MARIST.EDU
Cc:
Date: Jan
Paul, you have asked what, last century, used to be called, the “64 thousand
dollar question” (“$64K”). In any case, it sure is a big question.
We are all awaiting the official answer, no matter which operating system we
favor (z/Linux, z/VM, z/VSE, z/TPF, or, my favorite, z/OS).
Some think
Greetings List Lurkers,
I may have missed the discussion, as I have been enjoying an old fashion
New England Flu (not to be missed :^). So can CPU data cache timing in
IBM z series hardware be abused to efficiently leak information, and if
so what can be done about it?
Kindest Regards,
