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6e1cce7cda
Add an inner __open_path_or_exit() API to let the caller provide additional information on ENOENT to try and help the user figure out why the test is being skipped, e.g. for files like the page_idle bitmap needed by the access tracking perf, which is dependent on a Kconfig. Immediately convert /dev/kvm to the new API, both as an example and because users might not know that some architectures/setups require loading KVM. Link: https://lore.kernel.org/r/20250516215909.2551628-3-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com>