Re: [PATCH bpf-next v11 3/4] selftests/bpf: add selftest to check bpf_get_cpu_time_counter jit

[Vadim Fedorenko <vadim.fedorenko@linux.dev>]

On 18/03/2025 00:30, Alexei Starovoitov wrote:
> On Mon, Mar 17, 2025 at 3:50 PM Vadim Fedorenko <vadfed@meta.com> wrote:
>>
>> bpf_get_cpu_time_counter() is replaced with rdtsc instruction on x86_64.
>> Add tests to check that JIT works as expected.
>>
>> Acked-by: Eduard Zingerman <eddyz87@gmail.com>
>> Signed-off-by: Vadim Fedorenko <vadfed@meta.com>
>> ---
>>   .../selftests/bpf/prog_tests/verifier.c       |   2 +
>>   .../selftests/bpf/progs/verifier_cpu_cycles.c | 104 ++++++++++++++++++
>>   2 files changed, 106 insertions(+)
>>   create mode 100644 tools/testing/selftests/bpf/progs/verifier_cpu_cycles.c
>>
>> diff --git a/tools/testing/selftests/bpf/prog_tests/verifier.c b/tools/testing/selftests/bpf/prog_tests/verifier.c
>> index e66a57970d28..d5e7e302a344 100644
>> --- a/tools/testing/selftests/bpf/prog_tests/verifier.c
>> +++ b/tools/testing/selftests/bpf/prog_tests/verifier.c
>> @@ -102,6 +102,7 @@
>>   #include "verifier_xdp_direct_packet_access.skel.h"
>>   #include "verifier_bits_iter.skel.h"
>>   #include "verifier_lsm.skel.h"
>> +#include "verifier_cpu_cycles.skel.h"
>>   #include "irq.skel.h"
>>
>>   #define MAX_ENTRIES 11
>> @@ -236,6 +237,7 @@ void test_verifier_bits_iter(void) { RUN(verifier_bits_iter); }
>>   void test_verifier_lsm(void)                  { RUN(verifier_lsm); }
>>   void test_irq(void)                          { RUN(irq); }
>>   void test_verifier_mtu(void)                 { RUN(verifier_mtu); }
>> +void test_verifier_cpu_cycles(void)          { RUN(verifier_cpu_cycles); }
>>
>>   static int init_test_val_map(struct bpf_object *obj, char *map_name)
>>   {
>> diff --git a/tools/testing/selftests/bpf/progs/verifier_cpu_cycles.c b/tools/testing/selftests/bpf/progs/verifier_cpu_cycles.c
>> new file mode 100644
>> index 000000000000..5b62e3690362
>> --- /dev/null
>> +++ b/tools/testing/selftests/bpf/progs/verifier_cpu_cycles.c
>> @@ -0,0 +1,104 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/* Copyright (c) 2022 Meta Inc. */
> 
> botched copy paste.

Ouch.