Created attachment 125201 [details]
patch

STEPS TO REPRODUCE
1. clone, compile and install linux test project (https://github.com/linux-test-project/ltp.git)
2. valgrind  -q --trace-children=yes ~/ltp/testcases/kernel/syscalls/delete_module/delete_module01 

Actual Results:
tst_test.c:1217: INFO: Timeout per run is 0h 05m 00s
--21002-- WARNING: unhandled arm64-linux syscall: 273
--21002-- You may be able to write your own handler.
--21002-- Read the file README_MISSING_SYSCALL_OR_IOCTL.
--21002-- Nevertheless we consider this a bug.  Please report
--21002-- it at http://valgrind.org/support/bug_reports.html.
delete_module01.c:40: PASS: delete_module() successful

Expected Results:
tst_test.c:1217: INFO: Timeout per run is 0h 05m 00s
delete_module01.c:40: PASS: delete_module() successful

valgrind  -q --trace-children=yes ~/ltp/testcases/kernel/syscalls/bpf/bpf_prog01

Actual Results:
tst_buffers.c:55: INFO: Test is using guarded buffers
tst_test.c:1217: INFO: Timeout per run is 0h 05m 00s
bpf_common.h:18: INFO: Raising RLIMIT_MEMLOCK to 17039360
--22567-- WARNING: unhandled arm64-linux syscall: 280
--22567-- You may be able to write your own handler.
--22567-- Read the file README_MISSING_SYSCALL_OR_IOCTL.
--22567-- Nevertheless we consider this a bug.  Please report
--22567-- it at http://valgrind.org/support/bug_reports.html.
../../../../include/lapi/bpf.h:563: CONF: syscall(280) __NR_bpf not supported

Expected results:
tst_buffers.c:55: INFO: Test is using guarded buffers
tst_test.c:1217: INFO: Timeout per run is 0h 05m 00s
bpf_common.h:18: INFO: Raising RLIMIT_MEMLOCK to 17039360
bpf_prog01.c:90: PASS: Loaded program
bpf_prog01.c:149: PASS: val = 1

Proposed patch hookes up these syscalls for arm64.