1.Allocate extra vCPUs beyond max count, assert creation failure. 2.Create vCPU with ID over max ID, assert creation failure.
These tests cover function boundary scenarios, ensuring correct behavior on vCPU count/ID overlimit. Signed-off-by: Xin Liu <[email protected]> --- .../testing/selftests/kvm/kvm_create_max_vcpus.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/kvm/kvm_create_max_vcpus.c b/tools/testing/selftests/kvm/kvm_create_max_vcpus.c index c5310736ed06..42c88c249192 100644 --- a/tools/testing/selftests/kvm/kvm_create_max_vcpus.c +++ b/tools/testing/selftests/kvm/kvm_create_max_vcpus.c @@ -17,10 +17,10 @@ #include "asm/kvm.h" #include "linux/kvm.h" -void test_vcpu_creation(int first_vcpu_id, int num_vcpus) +void test_vcpu_creation(int first_vcpu_id, int num_vcpus, int kvm_max_vcpu_id) { struct kvm_vm *vm; - int i; + int i, fd; pr_info("Testing creating %d vCPUs, with IDs %d...%d.\n", num_vcpus, first_vcpu_id, first_vcpu_id + num_vcpus - 1); @@ -31,6 +31,14 @@ void test_vcpu_creation(int first_vcpu_id, int num_vcpus) /* This asserts that the vCPU was created. */ __vm_vcpu_add(vm, i); + fd = __vm_ioctl(vm, KVM_CREATE_VCPU, (void *)(unsigned long)(first_vcpu_id + num_vcpus)); + TEST_ASSERT(fd < 0, + "Expected failure when exceeding KVM_MAX_VCPUS, but got fd=%d", fd); + + fd = __vm_ioctl(vm, KVM_CREATE_VCPU, (void *)(unsigned long)kvm_max_vcpu_id); + TEST_ASSERT(fd < 0, + "Expected failure when exceeding KVM_MAX_VCPU_ID, but got fd=%d", fd); + kvm_vm_free(vm); } @@ -56,11 +64,11 @@ int main(int argc, char *argv[]) "KVM_MAX_VCPU_IDS (%d) must be at least as large as KVM_MAX_VCPUS (%d).", kvm_max_vcpu_id, kvm_max_vcpus); - test_vcpu_creation(0, kvm_max_vcpus); + test_vcpu_creation(0, kvm_max_vcpus, kvm_max_vcpu_id); if (kvm_max_vcpu_id > kvm_max_vcpus) test_vcpu_creation( - kvm_max_vcpu_id - kvm_max_vcpus, kvm_max_vcpus); + kvm_max_vcpu_id - kvm_max_vcpus, kvm_max_vcpus, kvm_max_vcpu_id); return 0; } -- 2.43.0
