HID: bpf: enforce HID_BPF dependencies

As mentioned in the link below, having JIT and BPF is not enough to
have fentry/fexit/fmod_ret APIs. This resolves the error that
happens on a system without tracing enabled when hid-bpf tries to
load itself.

Link: https://lore.kernel.org/r/CABRcYmKyRchQhabi1Vd9RcMQFCcb=EtWyEbFDFRTc-L-U8WhgA@mail.gmail.com
Fixes: f5c27da4e3c8 ("HID: initial BPF implementation")
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Reviewed-by: Florent Revest <revest@chromium.org>
Reviewed-by: Jiri Kosina <jkosina@suse.cz>
Link: https://lore.kernel.org/r/20221206145936.922196-4-benjamin.tissoires@redhat.com

diff --git a/drivers/hid/bpf/Kconfig b/drivers/hid/bpf/Kconfig
index 298634fc333515eadb98576dcbbd6deffaebed6a..03f52145b83b62033206152f8ca71cb6d2436eb5 100644 (file)
--- a/drivers/hid/bpf/Kconfig
+++ b/drivers/hid/bpf/Kconfig
@@ -4,7 +4,8 @@ menu "HID-BPF support"
 config HID_BPF
        bool "HID-BPF support"
        default HID_SUPPORT
-       depends on BPF && BPF_SYSCALL
+       depends on BPF && BPF_SYSCALL && \
+                  DYNAMIC_FTRACE_WITH_DIRECT_CALLS
        help
        This option allows to support eBPF programs on the HID subsystem.
        eBPF programs can fix HID devices in a lighter way than a full