From b4e87072762d063f9c20ba0ab2120e1910fa379f Mon Sep 17 00:00:00 2001 From: Song Liu Date: Mon, 25 Oct 2021 17:07:33 -0700 Subject: [PATCH] selftests/bpf: Skip all serial_test_get_branch_snapshot in vm Skipping the second half of the test is not enough to silent the warning in dmesg. Skip the whole test before we can either properly silent the warning in kernel, or fix LBR snapshot for VM. Fixes: 025bd7c753aa ("selftests/bpf: Add test for bpf_get_branch_snapshot") Fixes: aa67fdb46436 ("selftests/bpf: Skip the second half of get_branch_snapshot in vm") Signed-off-by: Song Liu Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20211026000733.477714-1-songliubraving@fb.com --- .../bpf/prog_tests/get_branch_snapshot.c | 16 ++++++---------- 1 file changed, 6 insertions(+), 10 deletions(-) diff --git a/tools/testing/selftests/bpf/prog_tests/get_branch_snapshot.c b/tools/testing/selftests/bpf/prog_tests/get_branch_snapshot.c index d6d70a359aeb5..81402e4439844 100644 --- a/tools/testing/selftests/bpf/prog_tests/get_branch_snapshot.c +++ b/tools/testing/selftests/bpf/prog_tests/get_branch_snapshot.c @@ -78,6 +78,12 @@ void serial_test_get_branch_snapshot(void) struct get_branch_snapshot *skel = NULL; int err; + /* Skip the test before we fix LBR snapshot for hypervisor. */ + if (is_hypervisor()) { + test__skip(); + return; + } + if (create_perf_events()) { test__skip(); /* system doesn't support LBR */ goto cleanup; @@ -107,16 +113,6 @@ void serial_test_get_branch_snapshot(void) goto cleanup; } - if (is_hypervisor()) { - /* As of today, LBR in hypervisor cannot be stopped before - * too many entries are flushed. Skip the hit/waste test - * for now in hypervisor until we optimize the LBR in - * hypervisor. - */ - test__skip(); - goto cleanup; - } - ASSERT_GT(skel->bss->test1_hits, 6, "find_looptest_in_lbr"); /* Given we stop LBR in software, we will waste a few entries.