** Changed in: linux (Ubuntu Hirsute)
Status: Fix Released => In Progress
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https://bugs.launchpad.net/bugs/1902179
Title:
[20.04 FEAT] Support/enhancement of NVMe IPL
Status in Ubuntu on IBM z Systems:
Triaged
Status in linux package in Ubuntu:
In Progress
Status in s390-tools package in Ubuntu:
Fix Released
Status in linux source package in Focal:
New
Status in s390-tools source package in Focal:
New
Status in linux source package in Groovy:
In Progress
Status in s390-tools source package in Groovy:
Fix Released
Status in linux source package in Hirsute:
In Progress
Status in s390-tools source package in Hirsute:
Fix Released
Bug description:
SRU Justification: (groovy)
==================
[Impact]
* The basics for being able to IPL (boot) from NVMe devices on s390x
were introduced with kernel 5.8.
* This was tested and is proven to work with groovy.
* Now a patch was requested to be added to groovy that introduces
support for NVMe IPL kernel parameters.
[Fix]
* d9f12e48d08ec08ace574050a838e001e442ee38 d9f12e48d08e "s390/ipl:
support NVMe IPL kernel parameters"
[Test Case]
* IBM z15 or LinuxONE III hardware is needed with an NVMe device
attached to a LPAR.
* Just check if NVMe kernel parameters can be passed over.
* Due to the lack of hardware this test needs to be done by IBM.
[Regression Potential]
* There is a certain regression risk with this patch, since:
* The handling of 'scpdata' is changed, and with that the way how
kernel cmd-line parameters are extracted from the NVMe IPL block, that
is passed by the firmware to the kernel at boot time.
* If broken such a hand over will not work for NVMe anymore - which
wouldn't be a very big problem for now, since booting w/o still works
fine (as it does today).
* But in worst case it could break the hand over of cmd-line
parameters for FCP devices, since some code is shared or even harm ipl
in general.
* The patch is upstream accepted (with v5.10-rc1 - as of today in
linux-next) and a patched groovy kernel was build and shared for
further testing.
* All modifications are limited to the s390x architecture and there
again to the unique way of booting aka IPL (s390/boot/ipl*).
[Other]
* This is in preparation for getting IPL (boot) from NVMe device
support on s390x backported to focal (for hardware enablement
reasons).
* Without having this patch in groovy, one may face a regression
during upgrade from groovy to focal.
* Since it's planned to have the hirsute kernel on 5.1x, it will have
this patch sooner or later.
* However, since the today's hirsute kernel is just based on groovy,
I've added hirsute to the SRU.
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