hv_kvm_unit_test: Add unit test for hyper-v

Hyper-V testdev device test via kvm-unit-tests
Signed-off-by: NYu Wang <wyu@redhat.com>

qemu/tests/cfg/hv_kvm_unit_test.cfg

+- hv_kvm_unit_test:
+    type = hv_kvm_unit_test
+    only Windows
+    only q35
+    start_vm = no
+    cpu_model_flags += ",hv_crash"
+    compile_cmd = "cd %s && cp %s/kvm-unit-tests.tar.gz . && tar -xvzf kvm-unit-tests.tar.gz"
+    compile_cmd += " && cd kvm-unit-tests && ./configure && make"
+    test_cmd = "cd %s/kvm-unit-tests"
+    test_cmd += " && ./x86/run x86/%s -cpu %s -device hyperv-testdev -M q35"
+
+    unit_tests_mapping = '{"hyperv_synic.flat": ["PASS", 1], "hyperv_stimer.flat": ["PASS", 6], "hyperv_connections.flat": ["PASS", 7]}'
+    Host_RHEL.m7, Host_RHEL.m8.u0, Host_RHEL.m8.u1, Host_RHEL.m8.u2:
+        skip_tests = "hyperv_connections.flat"

qemu/tests/hv_kvm_unit_test.py

+import logging
+import re
+import json
+
+from virttest import error_context
+from virttest import data_dir
+from virttest import cpu
+from avocado.utils import process
+
+
+@error_context.context_aware
+def run(test, params, env):
+    """
+    Run kvm-unit-tests for Hyper-V testdev device
+
+    1) compile kvm-unit-tests tools source code
+    2) Run each unit tests by compiled binary tools
+    3) For each unit test, compare the test result to expected value
+    """
+    tmp_dir = data_dir.get_tmp_dir()
+    kvm_unit_tests_dir = data_dir.get_deps_dir("kvm_unit_tests")
+    compile_cmd = params["compile_cmd"] % (tmp_dir, kvm_unit_tests_dir)
+    test_cmd = params["test_cmd"]
+    unit_tests_mapping = params["unit_tests_mapping"]
+    skip_tests = params.get("skip_tests", "").split()
+    cpu_flags = params["cpu_model_flags"]
+    cpu_model = cpu.get_qemu_best_cpu_model(params)
+    cpu_param = cpu_model + cpu_flags
+
+    error_context.context("Copy & compile kvm-unit-test tools", logging.info)
+    process.system(compile_cmd, shell=True)
+
+    error_context.context("Run unit tests", logging.info)
+    for unit_test, unit_test_result in json.loads(unit_tests_mapping).items():
+        if unit_test in skip_tests:
+            continue
+        logging.info("Start running unit test %s" % unit_test)
+        unit_test_cmd = test_cmd % (tmp_dir, unit_test, cpu_param)
+        result_output = process.system_output(unit_test_cmd, shell=True)
+        result_output = result_output.decode()
+        find_result = re.findall('^%s' % unit_test_result[0], result_output, re.M)
+        if len(find_result) != int(unit_test_result[1]):
+            test.fail("Unit test result mismatch target, "
+                      "target=%s, output=%s" %
+                      (unit_test_result[1], result_output))