lib/test_kho: check if KHO is enabled

2025-12-01T10:45:37+00:00

commit a26ec8f3d4e56d4a7ffa301e8032dca9df0bbc05 upstream. We must check whether KHO is enabled prior to issuing KHO commands, otherwise KHO internal data structures are not initialized. Link: https://lkml.kernel.org/r/20251106220635.2608494-1-pasha.tatashin@soleen.com Fixes: b753522bed0b ("kho: add test for kexec handover") Signed-off-by: Pasha Tatashin Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-lkp/202511061629.e242724-lkp@intel.com Reviewed-by: Pratyush Yadav Reviewed-by: Mike Rapoport (Microsoft) Cc: Alexander Graf Cc: Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman

kho: add test for kexec handover

2025-08-02T19:01:41+00:00

Testing kexec handover requires a kernel driver that will generate some data and preserve it with KHO on the first boot and then restore that data and verify it was preserved properly after kexec. To facilitate such test, along with the kernel driver responsible for data generation, preservation and restoration add a script that runs a kernel in a VM with a minimal /init. The /init enables KHO, loads a kernel image for kexec and runs kexec reboot. After the boot of the kexeced kernel, the driver verifies that the data was properly preserved. [rppt@kernel.org: fix section mismatch] Link: https://lkml.kernel.org/r/aIiRC8fXiOXKbPM_@kernel.org Link: https://lkml.kernel.org/r/20250727083733.2590139-1-rppt@kernel.org Signed-off-by: Mike Rapoport (Microsoft) Cc: Alexander Graf Cc: Changyuan Lyu Cc: Pasha Tatashin Cc: Pratyush Yadav Cc: Shuah Khan Signed-off-by: Andrew Morton

kernel/git/stable/linux-stable.git/lib/test_kho.c, branch linux-6.17.y

lib/test_kho: check if KHO is enabled

kho: add test for kexec handover