ci: add virtual CLOCK_REALTIME shim and DKMS unit tests - #7
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Introduce an LD_PRELOAD shim and wrapper that redirect phc2sys CLOCK_REALTIME operations to per-node stand-in mock PHCs, plus scripts/create-vrt-clocks.sh to create those PHCs on Kind workers. Update ARCHITECTURE.md and README.md with the CI-only VRT setup.
…SS/UBX Introduce scripts/test-dpll.sh, scripts/test-phc.sh, and scripts/test-gnss-ubx.sh with embedded Python helpers to exercise the netdevsim DPLL, mock PHC, and GNSS/UBX emulation via sysfs, generic netlink, and device ioctls. Add Makefile targets (test-dpll, test-phc, test-gnss-ubx, test-all, dkms-install, dkms-uninstall) and update README.md and ARCHITECTURE.md with DKMS install shortcuts and unit-test instructions. Also make the clean target remove build artifacts across ptp/dpll/netdevsim without invoking the kernel build system.
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Summary
CLOCK_REALTIME(VRT) LD_PRELOAD shim (shim/) so Kind workers can runphc2sys -a -ragainst a per-node stand-in mock PHC instead of the shared host clock.scripts/create-vrt-clocks.shto create those PHCs on Kind workers and document the setup inREADME.md/ARCHITECTURE.md/shim/README.md.test-dpll,test-phc,test-gnss-ubx,test-all), plusdkms-install/dkms-uninstallshortcuts.Related
Test plan
make dkms-installon a supported kernelmake test-all(or individualtest-dpll/test-phc/test-gnss-ubx)shim/test-shim-smoke.shwith loaded netdevsim-dkmsscripts/create-vrt-clocks.shwrites/var/run/ptp/vrt/deviceper worker