Re: [PATCH 0/1] pc-bios: Support List-Directed IPL from ECKD DASD

[Thomas Huth <thuth@redhat.com>]

On 20/02/2023 16.13, Jared Rossi wrote:
> Hi,
> 
> Pinging this patch since v2.26.0 of s390-tools adds ECKD DASD list-directed IPL.
> This patch set allows QEMU to utilize that new boot pointer format.
> Any feedback about what needs to be changed for acceptance is much appreciated.

Where did you send your patches to? I can't find it in neither my qemu-s390x 
nor my qemu-devel mailing list folders.

  Thomas


> 
> On 1/30/23 4:24 PM, Jared Rossi wrote:
> 
>> Add support for List-Directed IPL (LD-IPL) type pointers.
>>
>> We check for a boot record indicating LD-IPL and use it if it is valid,
>> otherwise we use the CCW CDL or LDL format as usual. When a block is accessed
>> during IPL the block number is first calculated based on the cylinder, head,
>> and record numbers included in the block pointer; if LD-IPL has been initiated
>> then each pointer will be interpreted using the new format.
>>
>> For simplicity, there is no choice presented to forcibly use CCW-IPL if LD-IPL
>> is available.  Because both sets of pointers ultimately go to the same
>> kernel/initrd, using CCW- or LD-IPL is transparent to the user.
>>
>> One aspect of the user experience that does change is the availability of the
>> interactive boot menu when a loadparm is not specified.  For the existing
>> CCW-IPL, when the user does not specify a loadparm they are presented with a
>> list of boot options; however, this list is only written in the old style
>> pointers.  Therefore, if no loadparm is specified, and LD-IPL is supported, the
>> default boot option will be used automatically.
>>
>> Jared Rossi (1):
>>    pc-bios: Add support for List-Directed IPL from ECKD DASD
>>
>>   pc-bios/s390-ccw/bootmap.c | 157 ++++++++++++++++++++++++++++---------
>>   pc-bios/s390-ccw/bootmap.h |  30 ++++++-
>>   2 files changed, 148 insertions(+), 39 deletions(-)
>>