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| author | Sean Christopherson <seanjc@google.com> | 2026-07-31 12:56:04 -0700 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2026-07-31 13:54:08 -0700 |
| commit | 8de0e85f654ee3f5d2db5d69a9ece040e7de0301 (patch) | |
| tree | d45d9b821a8d7696e58df4f6fd3c4395d0f60558 | |
| parent | 496779b54943171d6966f8b46f5ce1647bf3275c (diff) | |
| download | linux-next-8de0e85f654ee3f5d2db5d69a9ece040e7de0301.tar.gz linux-next-8de0e85f654ee3f5d2db5d69a9ece040e7de0301.zip | |
KVM: selftests: Return the target CPU from pin_task_to_random_cpu()
When pinning a task to a random CPU, return which CPU the task was pinned
to so that the caller can do things like avoid running other tasks on the
target CPU.
Link: https://patch.msgid.link/20260731195612.2697986-5-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
| -rw-r--r-- | tools/testing/selftests/kvm/include/kvm_util.h | 2 | ||||
| -rw-r--r-- | tools/testing/selftests/kvm/lib/kvm_util.c | 5 |
2 files changed, 4 insertions, 3 deletions
diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h index b39e713c30a4..61d72e1e7601 100644 --- a/tools/testing/selftests/kvm/include/kvm_util.h +++ b/tools/testing/selftests/kvm/include/kvm_util.h @@ -1094,7 +1094,7 @@ static inline void pin_task_to_cpu(pthread_t task, int cpu) TEST_ASSERT(!r, "Failed to set thread affinity to pCPU '%u'", cpu); } -void pin_task_to_random_cpu(pthread_t task, cpu_set_t *possible_cpus); +int pin_task_to_random_cpu(pthread_t task, cpu_set_t *possible_cpus); static inline int pin_task_to_any_cpu(pthread_t task) { diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c index 3794575d2ca0..af2bad0553f9 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -668,7 +668,7 @@ void kvm_print_vcpu_pinning_help(void) " (default: no pinning)\n", name, name); } -void pin_task_to_random_cpu(pthread_t task, cpu_set_t *possible_cpus) +int pin_task_to_random_cpu(pthread_t task, cpu_set_t *possible_cpus) { int target_idx; int nr_cpus; @@ -682,11 +682,12 @@ void pin_task_to_random_cpu(pthread_t task, cpu_set_t *possible_cpus) for (cpu = 0; cpu < CPU_SETSIZE; cpu++) { if (CPU_ISSET(cpu, possible_cpus) && target_idx-- == 0) { pin_task_to_cpu(task, cpu); - return; + return cpu; } } TEST_FAIL("Failed to find random CPU in possible_cpus"); + return -1; } void kvm_parse_vcpu_pinning(const char *pcpus_string, u32 vcpu_to_pcpu[], |