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

[Thomas Huth]

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(-)