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KVM: selftests: Clean up global constants in hardware disable test

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Rename the global constants in the hardware disable test to better
capture what they control, and open code the literal number of sleeping
tasks and iterations instead of using power-of-2 math to express values
that are 100% arbitrary.

Opportunistically tag the global semaphore with "static".

No functional change intended.

Link: https://patch.msgid.link/20260731195612.2697986-13-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson 2026-07-31 12:56:12 -07:00
parent 939b20e5f3
commit 1039496ae7
1 changed files with 10 additions and 10 deletions
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20
tools/testing/selftests/kvm/hardware_disable_test.c
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@ -17,13 +17,13 @@
#include "kvm_util.h"
#include "ucall_common.h"
#define VCPU_NUM 4
#define SLEEPING_THREAD_NUM (1 << 4)
#define FORK_NUM (1ULL << 9)
#define DELAY_US_MAX 2000
#define NR_VCPUS 4
#define NR_SLEEPERS_PER_VCPU 16
#define NR_ITERATIONS 512
#define DELAY_US_MAX 2000
static cpu_set_t threads_cpu_set;
sem_t *sem;
static sem_t *sem;
static void guest_code(void)
{
@ -75,15 +75,15 @@ static void run_test(u32 run)
TEST_ASSERT_EQ(pthread_attr_setaffinity_np(&attr, sizeof(cpu_set_t), &threads_cpu_set), 0);
#endif
vm = vm_create(VCPU_NUM);
vm = vm_create(NR_VCPUS);
pr_debug("%s: [%d] start vcpus\n", __func__, run);
for (i = 0; i < VCPU_NUM; ++i) {
for (i = 0; i < NR_VCPUS; ++i) {
vcpu = vm_vcpu_add(vm, i, guest_code);
kvm_pthread_create(&thread, &attr, run_vcpu, vcpu);
for (j = 0; j < SLEEPING_THREAD_NUM; ++j)
for (j = 0; j < NR_SLEEPERS_PER_VCPU; ++j)
kvm_pthread_create(&thread, &attr, sleeping_thread, (void *)NULL);
}
pr_debug("%s: [%d] all threads launched\n", __func__, run);
@ -132,7 +132,7 @@ int main(int argc, char **argv)
kvm_sched_getaffinity(0, sizeof(cpu_set_t), &allowed_cpu_set);
for (i = 0; i < VCPU_NUM && CPU_COUNT(&allowed_cpu_set); i++) {
for (i = 0; i < NR_VCPUS && CPU_COUNT(&allowed_cpu_set); i++) {
cpu = kvm_pick_random_cpu(&allowed_cpu_set);
CPU_CLR(cpu, &allowed_cpu_set);
CPU_SET(cpu, &threads_cpu_set);
@ -141,7 +141,7 @@ int main(int argc, char **argv)
sem = sem_open("vm_sem", O_CREAT | O_EXCL, 0644, 0);
sem_unlink("vm_sem");
for (i = 0; i < FORK_NUM; ++i) {
for (i = 0; i < NR_ITERATIONS; ++i) {
pid = fork();
TEST_ASSERT(pid >= 0, "%s: unable to fork", __func__);
if (pid == 0)