Hi Fuad,
On Tue, Jun 15, 2021 at 3:03 AM Fuad Tabba <tabba@xxxxxxxxxx> wrote:
>
> Hi Jing,
>
> > +int main(int argc, char *argv[])
> > +{
> > + int max_vm = DEFAULT_NUM_VM, max_vcpu = DEFAULT_NUM_VCPU, ret, i, j;
> > + struct kvm_vm **vms;
> > +
> > + /* Get the number of VMs and VCPUs that would be created for testing. */
> > + if (argc > 1) {
> > + max_vm = strtol(argv[1], NULL, 0);
> > + if (max_vm <= 0)
> > + max_vm = DEFAULT_NUM_VM;
> > + }
> > + if (argc > 2) {
> > + max_vcpu = strtol(argv[2], NULL, 0);
> > + if (max_vcpu <= 0)
> > + max_vcpu = DEFAULT_NUM_VCPU;
> > + }
> > +
> > + /* Check the extension for binary stats */
> > + ret = kvm_check_cap(KVM_CAP_BINARY_STATS_FD);
> > + TEST_ASSERT(ret >= 0,
> > + "Binary form statistics interface is not supported");
>
> kvm_check_cap returns the value of KVM_CHECK_EXTENSION, which is 0 if
> unsupported (-ERROR on an error). The assertion should be for ret > 0.
>
> Made that change locally, and tested it with various configurations
> (vhe, nvhe), as well as kernel versions (with and without
> KVM_CAP_BINARY_STATS_FD), and it passes (or fails as expected).
> Without that fix and with a kernel that doesn't support
> KVM_CAP_BINARY_STATS_FD, it passes that assertion, but fails later at
> vcpu_stats_test().
>
> With that fixed:
> Tested-by: Fuad Tabba <tabba@xxxxxxxxxx> #arm64
>
> Cheers,
> /fuad
>
>
Thanks for the review and testing. Will fix it.
> > +
> > + /* Create VMs and VCPUs */
> > + vms = malloc(sizeof(vms[0]) * max_vm);
> > + TEST_ASSERT(vms, "Allocate memory for storing VM pointers");
> > + for (i = 0; i < max_vm; ++i) {
> > + vms[i] = vm_create(VM_MODE_DEFAULT,
> > + DEFAULT_GUEST_PHY_PAGES, O_RDWR);
> > + for (j = 0; j < max_vcpu; ++j)
> > + vm_vcpu_add(vms[i], j);
> > + }
> > +
> > + /* Check stats read for every VM and VCPU */
> > + for (i = 0; i < max_vm; ++i) {
> > + vm_stats_test(vms[i]);
> > + for (j = 0; j < max_vcpu; ++j)
> > + vcpu_stats_test(vms[i], j);
> > + }
> > +
> > + for (i = 0; i < max_vm; ++i)
> > + kvm_vm_free(vms[i]);
> > + free(vms);
> > + return 0;
> > +}
> > diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
> > index 5c70596dd1b9..83c02cb0ae1e 100644
> > --- a/tools/testing/selftests/kvm/lib/kvm_util.c
> > +++ b/tools/testing/selftests/kvm/lib/kvm_util.c
> > @@ -2286,3 +2286,15 @@ unsigned int vm_calc_num_guest_pages(enum vm_guest_mode mode, size_t size)
> > n = DIV_ROUND_UP(size, vm_guest_mode_params[mode].page_size);
> > return vm_adjust_num_guest_pages(mode, n);
> > }
> > +
> > +int vm_get_stats_fd(struct kvm_vm *vm)
> > +{
> > + return ioctl(vm->fd, KVM_GET_STATS_FD, NULL);
> > +}
> > +
> > +int vcpu_get_stats_fd(struct kvm_vm *vm, uint32_t vcpuid)
> > +{
> > + struct vcpu *vcpu = vcpu_find(vm, vcpuid);
> > +
> > + return ioctl(vcpu->fd, KVM_GET_STATS_FD, NULL);
> > +}
> > --
> > 2.32.0.272.g935e593368-goog
> >
Thank,
Jing
