[PATCH v5 5/5] KVM: selftests: Convert arch_timer tests to common helpers to pin task
Sean Christopherson
seanjc at google.com
Wed Jun 25 17:12:25 PDT 2025
Convert the arch timer tests to use __pin_task_to_cpu() and
pin_self_to_cpu().
No functional change intended.
Signed-off-by: Sean Christopherson <seanjc at google.com>
---
tools/testing/selftests/kvm/arch_timer.c | 7 +-----
.../kvm/arm64/arch_timer_edge_cases.c | 23 ++-----------------
2 files changed, 3 insertions(+), 27 deletions(-)
diff --git a/tools/testing/selftests/kvm/arch_timer.c b/tools/testing/selftests/kvm/arch_timer.c
index acb2cb596332..cf8fb67104f1 100644
--- a/tools/testing/selftests/kvm/arch_timer.c
+++ b/tools/testing/selftests/kvm/arch_timer.c
@@ -98,16 +98,11 @@ static uint32_t test_get_pcpu(void)
static int test_migrate_vcpu(unsigned int vcpu_idx)
{
int ret;
- cpu_set_t cpuset;
uint32_t new_pcpu = test_get_pcpu();
- CPU_ZERO(&cpuset);
- CPU_SET(new_pcpu, &cpuset);
-
pr_debug("Migrating vCPU: %u to pCPU: %u\n", vcpu_idx, new_pcpu);
- ret = pthread_setaffinity_np(pt_vcpu_run[vcpu_idx],
- sizeof(cpuset), &cpuset);
+ ret = __pin_task_to_cpu(pt_vcpu_run[vcpu_idx], new_pcpu);
/* Allow the error where the vCPU thread is already finished */
TEST_ASSERT(ret == 0 || ret == ESRCH,
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 4e71740a098b..ce74d069cb7b 100644
--- a/tools/testing/selftests/kvm/arm64/arch_timer_edge_cases.c
+++ b/tools/testing/selftests/kvm/arm64/arch_timer_edge_cases.c
@@ -862,25 +862,6 @@ static uint32_t next_pcpu(void)
return next;
}
-static void migrate_self(uint32_t new_pcpu)
-{
- int ret;
- cpu_set_t cpuset;
- pthread_t thread;
-
- thread = pthread_self();
-
- CPU_ZERO(&cpuset);
- CPU_SET(new_pcpu, &cpuset);
-
- pr_debug("Migrating from %u to %u\n", sched_getcpu(), new_pcpu);
-
- ret = pthread_setaffinity_np(thread, sizeof(cpuset), &cpuset);
-
- TEST_ASSERT(ret == 0, "Failed to migrate to pCPU: %u; ret: %d\n",
- new_pcpu, ret);
-}
-
static void kvm_set_cntxct(struct kvm_vcpu *vcpu, uint64_t cnt,
enum arch_timer timer)
{
@@ -907,7 +888,7 @@ static void handle_sync(struct kvm_vcpu *vcpu, struct ucall *uc)
sched_yield();
break;
case USERSPACE_MIGRATE_SELF:
- migrate_self(next_pcpu());
+ pin_self_to_cpu(next_pcpu());
break;
default:
break;
@@ -919,7 +900,7 @@ static void test_run(struct kvm_vm *vm, struct kvm_vcpu *vcpu)
struct ucall uc;
/* Start on CPU 0 */
- migrate_self(0);
+ pin_self_to_cpu(0);
while (true) {
vcpu_run(vcpu);
--
2.50.0.727.gbf7dc18ff4-goog
More information about the linux-arm-kernel
mailing list