KVM: selftests: check returned evmcs version range

Check that KVM_CAP_HYPERV_ENLIGHTENED_VMCS returns correct version range.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/tools/testing/selftests/kvm/x86_64/evmcs_test.c b/tools/testing/selftests/kvm/x86_64/evmcs_test.c
index ea3c73e8f4f6..c49c2a28b0eb 100644
--- a/tools/testing/selftests/kvm/x86_64/evmcs_test.c
+++ b/tools/testing/selftests/kvm/x86_64/evmcs_test.c
@@ -103,6 +103,12 @@ int main(int argc, char *argv[])
 
         vcpu_ioctl(vm, VCPU_ID, KVM_ENABLE_CAP, &enable_evmcs_cap);
 
+        /* KVM should return supported EVMCS version range */
+        TEST_ASSERT(((evmcs_ver >> 8) >= (evmcs_ver & 0xff)) &&
+                    (evmcs_ver & 0xff) > 0,
+                    "Incorrect EVMCS version range: %x:%x\n",
+                    evmcs_ver & 0xff, evmcs_ver >> 8);
+
         run = vcpu_state(vm, VCPU_ID);
 
         vcpu_regs_get(vm, VCPU_ID, &regs1);