[PATCH v2 0/5] kexec: reorganize sysfs interface and add new kexec sysfs

[Sourabh Jain <sourabhjain@linux.ibm.com>]

All existing kexec and kdump sysfs entries are moved to a new location,
/sys/kernel/kexec, to keep /sys/kernel/ clean and better organized.
Symlinks are created at the old locations for backward compatibility and
can be removed in the future [02/05].

While doing this cleanup, missing ABI documentation for the old sysfs
interfaces is added, and those entries are marked as deprecated
[01/05 and 03/05]. New ABI documentation is also added for the
reorganized interfaces. [04/05]

Along with this reorganization, a new sysfs file,
/sys/kernel/kexec/crash_cma_ranges, is introduced to export crashkernel
CMA reservation details to user space [05/05]. This helps tools determine the
total crashkernel reserved memory and warn users that capturing user
pages while CMA is reserved may cause incomplete or unreliable dumps.

Cc: Aditya Gupta <adityag@linux.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Baoquan he <bhe@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Hari Bathini <hbathini@linux.ibm.com>
Cc: Jiri Bohac <jbohac@suse.cz>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Mahesh J Salgaonkar <mahesh@linux.ibm.com>
Cc: Pingfan Liu <piliu@redhat.com>
Cc: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Cc: Shivang Upadhyay <shivangu@linux.ibm.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: kexec@lists.infradead.org

Sourabh Jain (5):
  Documentation/ABI: add kexec and kdump sysfs interface
  kexec: move sysfs entries to /sys/kernel/kexec
  Documentation/ABI: mark old kexec sysfs deprecated
  kexec: document new kexec and kdump sysfs ABIs
  crash: export crashkernel CMA reservation to userspace

 .../ABI/obsolete/sysfs-kernel-kexec-kdump     |  59 +++++++++
 .../ABI/testing/sysfs-kernel-kexec-kdump      |  61 +++++++++
 kernel/kexec_core.c                           | 118 ++++++++++++++++++
 kernel/ksysfs.c                               |  68 +---------
 4 files changed, 239 insertions(+), 67 deletions(-)
 create mode 100644 Documentation/ABI/obsolete/sysfs-kernel-kexec-kdump
 create mode 100644 Documentation/ABI/testing/sysfs-kernel-kexec-kdump

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2.51.0