perf: make bpf asm include arch conditional

To keep the perf source copying as small as possible, we can
further refine the arch/uapi copy to the single file that we
currently need.

To avoid a warning from the general perf source copy routine,
we make the .h conditional based on the architecture.

The supported architectures will not change often, so updating
this arch list is very minimal effort. Alternatively, we could
add a PERF_OPTIONAL_SRC variable and not warn if a file isn't
available for a given architecture.

(From OE-Core rev: 879b4a7d378b4d4d11fdda7921b8c47e4523a948)

Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 5 insertions, 2 deletions

diff --git a/meta/recipes-kernel/perf/perf.bb b/meta/recipes-kernel/perf/perf.bb
index fe96e1012b..11fa917649 100644
--- a/meta/recipes-kernel/perf/perf.bb
+++ b/meta/recipes-kernel/perf/perf.bb
@@ -129,7 +129,10 @@ EXTRA_OEMAKE += "\
 # honour a JOBS variable.
 EXTRA_OEMAKE:append:task-configure = " JOBS=1"
 
-# include/uapi/asm is for: include/uapi/asm/bpf_perf_event.h
+# the architectures that need this file can be found in
+#    tools/include/uapi/asm/bpf_perf_event.h
+# We are only listing supported arches at the moment
+PERF_BPF_EVENT_SRC ?= '${@bb.utils.contains_any("ARCH", [ "riscv", "arm64" ], "arch/${ARCH}/include/uapi/asm/bpf_perf_event.h", "", d)}'
 PERF_SRC ?= "Makefile \
              tools/arch \
              tools/build \
@@ -140,7 +143,7 @@ PERF_SRC ?= "Makefile \
              tools/scripts \
              scripts/ \
              arch/arm64/tools \
-             arch/${ARCH}/include/uapi/asm/ \
+             ${PERF_BPF_EVENT_SRC} \
              arch/${ARCH}/Makefile \
 "