Re: SFTP Question

If you're really interested, National Computer Security Center document
NCSC-FER-95/006.D has a very in-depth explanation of the OS. It's quite
old now (V4R4), but most of it is still relevant. There's earlier versions
of the document found online. I'm not sure where you can find revision D,
though. One thing to note is that it doesn't cover PASE at all,
unfortunately, and the evaluation considered was only 1 partition, so they
lumped the hypervisor in with SLIC to make things simpler.


"MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx> wrote on 03/11/2016
04:55:10 PM:

From: Buck Calabro <kc2hiz@xxxxxxxxx>
To: midrange-l@xxxxxxxxxxxx
Date: 03/11/2016 04:55 PM
Subject: Re: SFTP Question
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>

On 3/11/2016 4:39 PM, Nathan Andelin wrote:

PASE and IBM i are joined at the hypervisor level in the SLIC, and

below

that at the Power chip level. Otherwise they are quite separate. PASE

runs

on top of the "syscall" interface, while IBM i runs on top of the
"technology independent machine interface". PASE does not receive the
benefits of single-level store, nor the assurance that your

applications

will run on new hardware.

Below the SLIC, the hypervisor switches between two distinct processor
modes, one for running PASE workloads, and another for running IBM i
workloads. The "switching" is comparable to that which results from

having

multiple partitions running simultaneously.

Can you share a link, or is a NDA involved? I'd love to read up on

this!

--
--buck

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