I did not say anything about the removal of SIE, just the SIE assists (which require OCO). SIE itself is documented in SA22-7095 and invoked from HCPRUN, that's not OCO.
Jan Jaeger.
From: Alan Altmark <[EMAIL PROTECTED]> Reply-To: Linux on 390 Port <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] Subject: Re: OT: Intel gets virtualization clue? Date: Thu, 9 Oct 2003 13:25:21 -0400
On Thursday, 10/09/2003 at 04:53 GMT, Jan Jaeger <[EMAIL PROTECTED]> wrote: > Rick, see this from the positive side, once SIE assist code etc has been > removed, there will no longer be an argument for OCO ;-)
No one said anything about the removal of SIE; there continues to be support for two levels of SIE in the hardware. The I/O assists were the main attraction of V=F (IMO). Looking down the road, the DMA aspects of QDIO (for SCSI and network devices) reduce the benefit of I/O assists anyway.
Alan Altmark Sr. Software Engineer IBM z/VM Development
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