diff options
| author | Sebastian Ott <sebott@redhat.com> | 2025-06-05 12:36:11 +0200 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2025-06-05 14:27:21 +0100 |
| commit | 050632ae6571d0f148fa0d4b90b6409a12645461 (patch) | |
| tree | 90ead3bede0de1ab2f41958b8d20dddf3c622eff /tools/testing/selftests/kvm | |
| parent | 9a9864fd09c7e52440c05e70609bf5ee8da425d0 (diff) | |
KVM: arm64: selftests: Fix thread migration in arch_timer_edge_cases
arch_timer_edge_cases tries to migrate itself across host cpus. Before
the first test, it migrates to cpu 0 by setting up an affinity mask with
only bit 0 set. After that it looks for the next possible cpu in the
current affinity mask which still has only bit 0 set. So there is no
migration at all.
Fix this by reading the default mask at start and use this to find
the next cpu in each iteration.
Signed-off-by: Sebastian Ott <sebott@redhat.com>
Link: https://lore.kernel.org/r/20250605103613.14544-3-sebott@redhat.com
Signed-off-by: Marc Zyngier <maz@kernel.org>
Diffstat (limited to 'tools/testing/selftests/kvm')
| -rw-r--r-- | tools/testing/selftests/kvm/arm64/arch_timer_edge_cases.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/tools/testing/selftests/kvm/arm64/arch_timer_edge_cases.c b/tools/testing/selftests/kvm/arm64/arch_timer_edge_cases.c index c4716e0c1438..a813b4c6c817 100644 --- a/tools/testing/selftests/kvm/arm64/arch_timer_edge_cases.c +++ b/tools/testing/selftests/kvm/arm64/arch_timer_edge_cases.c @@ -849,17 +849,17 @@ static void guest_code(enum arch_timer timer) GUEST_DONE(); } +static cpu_set_t default_cpuset; + static uint32_t next_pcpu(void) { uint32_t max = get_nprocs(); uint32_t cur = sched_getcpu(); uint32_t next = cur; - cpu_set_t cpuset; + cpu_set_t cpuset = default_cpuset; TEST_ASSERT(max > 1, "Need at least two physical cpus"); - sched_getaffinity(0, sizeof(cpuset), &cpuset); - do { next = (next + 1) % CPU_SETSIZE; } while (!CPU_ISSET(next, &cpuset)); @@ -1046,6 +1046,8 @@ int main(int argc, char *argv[]) if (!parse_args(argc, argv)) exit(KSFT_SKIP); + sched_getaffinity(0, sizeof(default_cpuset), &default_cpuset); + if (test_args.test_virtual) { test_vm_create(&vm, &vcpu, VIRTUAL); test_run(vm, vcpu); |