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Re: [RESEND PATCH 1/1] pc-bios: Add support for List-Directed IPL from E

From: Jared Rossi
Subject: Re: [RESEND PATCH 1/1] pc-bios: Add support for List-Directed IPL from ECKD DASD
Date: Mon, 6 Mar 2023 10:39:03 -0500
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.12.0

Sounds good.  Thanks Thomas.

Jared Rossi

On 3/6/23 7:12 AM, Thomas Huth wrote:
On 21/02/2023 18.45, jrossi@linux.ibm.com wrote:
From: Jared Rossi <jrossi@linux.ibm.com>

Check for a List Directed IPL Boot Record, which would supersede the CCW type
entries.  If the record is valid, proceed to use the new style pointers
and perform LD-IPL. Each block pointer is interpreted as either an LD-IPL
pointer or a legacy CCW pointer depending on the type of IPL initiated.

In either case CCW- or LD-IPL is transparent to the user and will boot the same image regardless of which set of pointers is used. Because the interactive boot menu is only written with the old style pointers, the menu will be disabled for
List Directed IPL from ECKD DASD.

If the LD-IPL fails, retry the IPL using the CCW type pointers.

If no LD-IPL boot record is found, simply perform CCW type IPL as usual.

Signed-off-by: Jared Rossi <jrossi@linux.ibm.com>

  pc-bios/s390-ccw/bootmap.c | 157 ++++++++++++++++++++++++++++---------
  pc-bios/s390-ccw/bootmap.h |  30 ++++++-
  2 files changed, 148 insertions(+), 39 deletions(-)

Ok, the patch survived my local regression testing, and it also looks good enough to me for inclusion, so I'll queue it for my
final pull request before the QEMU 8.0 soft freeze tomorrow.


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