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selftests/bpf: Enable timed may_goto tests for arm64

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As arm64 JIT now supports timed may_goto instruction, make sure all
relevant tests run on this architecture. Some tests were enabled and
other required modifications to work properly on arm64.

 $ ./test_progs -a "stream*","*may_goto*",verifier_bpf_fastcall

 #404     stream_errors:OK
 [...]
 #406/2   stream_success/stream_cond_break:OK
 [...]
 #494/23  verifier_bpf_fastcall/may_goto_interaction_x86_64:SKIP
 #494/24  verifier_bpf_fastcall/may_goto_interaction_arm64:OK
 [...]
 #539/1   verifier_may_goto_1/may_goto 0:OK
 #539/2   verifier_may_goto_1/batch 2 of may_goto 0:OK
 #539/3   verifier_may_goto_1/may_goto batch with offsets 2/1/0:OK
 #539/4   verifier_may_goto_1/may_goto batch with offsets 2/0:OK
 #539     verifier_may_goto_1:OK
 #540/1   verifier_may_goto_2/C code with may_goto 0:OK
 #540     verifier_may_goto_2:OK
 Summary: 7/16 PASSED, 25 SKIPPED, 0 FAILED

Signed-off-by: Puranjay Mohan <puranjay@kernel.org>
Acked-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Acked-by: Xu Kuohai <xukuohai@huawei.com>
Link: https://lore.kernel.org/r/20250827113245.52629-3-puranjay@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Puranjay Mohan 2025-08-27 11:32:44 +00:00 committed by Alexei Starovoitov
parent 16175375da
commit 22b22bf9ee
3 changed files with 23 additions and 40 deletions
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2
tools/testing/selftests/bpf/prog_tests/stream.c
View File

@ -77,7 +77,7 @@ void test_stream_errors(void)
ASSERT_OK(ret, "ret");
ASSERT_OK(opts.retval, "retval");
#if !defined(__x86_64__) && !defined(__s390x__)
#if !defined(__x86_64__) && !defined(__s390x__) && !defined(__aarch64__)
ASSERT_TRUE(1, "Timed may_goto unsupported, skip.");
if (i == 0) {
ret = bpf_prog_stream_read(prog_fd, 2, buf, sizeof(buf), &ropts);

27
tools/testing/selftests/bpf/progs/verifier_bpf_fastcall.c
View File

@ -660,19 +660,24 @@ __naked void may_goto_interaction_x86_64(void)
SEC("raw_tp")
__arch_arm64
__log_level(4) __msg("stack depth 16")
/* may_goto counter at -16 */
__xlated("0: *(u64 *)(r10 -16) =")
__xlated("1: r1 = 1")
__xlated("2: call bpf_get_smp_processor_id")
__log_level(4) __msg("stack depth 24")
/* may_goto counter at -24 */
__xlated("0: *(u64 *)(r10 -24) =")
/* may_goto timestamp at -16 */
__xlated("1: *(u64 *)(r10 -16) =")
__xlated("2: r1 = 1")
__xlated("3: call bpf_get_smp_processor_id")
/* may_goto expansion starts */
__xlated("3: r11 = *(u64 *)(r10 -16)")
__xlated("4: if r11 == 0x0 goto pc+3")
__xlated("5: r11 -= 1")
__xlated("6: *(u64 *)(r10 -16) = r11")
__xlated("4: r11 = *(u64 *)(r10 -24)")
__xlated("5: if r11 == 0x0 goto pc+6")
__xlated("6: r11 -= 1")
__xlated("7: if r11 != 0x0 goto pc+2")
__xlated("8: r11 = -24")
__xlated("9: call unknown")
__xlated("10: *(u64 *)(r10 -24) = r11")
/* may_goto expansion ends */
__xlated("7: *(u64 *)(r10 -8) = r1")
__xlated("8: exit")
__xlated("11: *(u64 *)(r10 -8) = r1")
__xlated("12: exit")
__success
__naked void may_goto_interaction_arm64(void)
{

34
tools/testing/selftests/bpf/progs/verifier_may_goto_1.c
View File

@ -10,6 +10,7 @@ SEC("raw_tp")
__description("may_goto 0")
__arch_x86_64
__arch_s390x
__arch_arm64
__xlated("0: r0 = 1")
__xlated("1: exit")
__success
@ -29,6 +30,7 @@ SEC("raw_tp")
__description("batch 2 of may_goto 0")
__arch_x86_64
__arch_s390x
__arch_arm64
__xlated("0: r0 = 1")
__xlated("1: exit")
__success
@ -50,6 +52,7 @@ SEC("raw_tp")
__description("may_goto batch with offsets 2/1/0")
__arch_x86_64
__arch_s390x
__arch_arm64
__xlated("0: r0 = 1")
__xlated("1: exit")
__success
@ -72,9 +75,10 @@ __naked void may_goto_batch_1(void)
}
SEC("raw_tp")
__description("may_goto batch with offsets 2/0 - x86_64 and s390x")
__description("may_goto batch with offsets 2/0")
__arch_x86_64
__arch_s390x
__arch_arm64
__xlated("0: *(u64 *)(r10 -16) = 65535")
__xlated("1: *(u64 *)(r10 -8) = 0")
__xlated("2: r11 = *(u64 *)(r10 -16)")
@ -88,33 +92,7 @@ __xlated("9: r0 = 1")
__xlated("10: r0 = 2")
__xlated("11: exit")
__success
__naked void may_goto_batch_2_x86_64_s390x(void)
{
asm volatile (
".8byte %[may_goto1];"
".8byte %[may_goto3];"
"r0 = 1;"
"r0 = 2;"
"exit;"
:
: __imm_insn(may_goto1, BPF_RAW_INSN(BPF_JMP | BPF_JCOND, 0, 0, 2 /* offset */, 0)),
__imm_insn(may_goto3, BPF_RAW_INSN(BPF_JMP | BPF_JCOND, 0, 0, 0 /* offset */, 0))
: __clobber_all);
}
SEC("raw_tp")
__description("may_goto batch with offsets 2/0 - arm64")
__arch_arm64
__xlated("0: *(u64 *)(r10 -8) = 8388608")
__xlated("1: r11 = *(u64 *)(r10 -8)")
__xlated("2: if r11 == 0x0 goto pc+3")
__xlated("3: r11 -= 1")
__xlated("4: *(u64 *)(r10 -8) = r11")
__xlated("5: r0 = 1")
__xlated("6: r0 = 2")
__xlated("7: exit")
__success
__naked void may_goto_batch_2_arm64(void)
__naked void may_goto_batch_2(void)
{
asm volatile (
".8byte %[may_goto1];"