[PATCH v1 0/2] luo support for preserving eventfd

[Chenghao Duan]

It is my great honor to participate in the development of LiveUpdate.
The current patch implements logic to preserve and retrieve eventfd
states, which I developed by referencing memfd_luo while learning the
LiveUpdate framework.

eventfd serves as a critical notification mechanism between Guest and
Host. During host kernel upgrades, we can preserve the corresponding
eventfd states and restore them after the kernel update completes.

Patch 0001 implements eventfd_luo, while Patch 0002 contains selftest code.
Test procedures:
    1. ./luo_test_eventfd --stage 1
    2. kexec reboot
    3. ./luo_test_eventfd --stage 2

Chenghao Duan (2):
  eventfd: luo: luo support for preserving eventfd
  selftests: liveupdate: Add selftest for eventfd LUO

 fs/Makefile                                   |   1 +
 fs/eventfd.c                                  |  40 ++
 fs/eventfd_luo.c                              | 250 ++++++++++++
 include/linux/eventfd.h                       |   2 +
 include/linux/kho/abi/eventfd.h               |  39 ++
 kernel/liveupdate/Kconfig                     |  16 +
 tools/testing/selftests/liveupdate/Makefile   |   1 +
 tools/testing/selftests/liveupdate/config     |   2 +
 .../selftests/liveupdate/luo_test_eventfd.c   | 376 ++++++++++++++++++
 9 files changed, 727 insertions(+)
 create mode 100644 fs/eventfd_luo.c
 create mode 100644 include/linux/kho/abi/eventfd.h
 create mode 100644 tools/testing/selftests/liveupdate/luo_test_eventfd.c

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2.25.1