SRIOV: add new test scenarios for vIOMMU

Automate new dma_translation attribute for vIOMMU:
VIRT-302220 - [vIOMMU][intel] Start VM with intel iommu and dma_translation attribute

Signed-off-by: Meina Li <[email protected]>

libvirt/tests/cfg/sriov/vIOMMU/intel_iommu_with_dma_translation.cfg

@@ -0,0 +1,17 @@
+- vIOMMU.intel_iommu_with_dma_translation:
+    type = intel_iommu_with_dma_translation
+    start_vm = "yes"
+    enable_guest_iommu = "yes"
+    iommu_dict = {'model': 'intel', 'driver': {'intremap': 'on', 'caching_mode': 'on', 'iotlb': 'on', 'dma_translation': '%s'}}
+    func_supported_since_libvirt_ver = (10, 7, 0)
+    only q35
+    variants:
+        - enable_dma_translation:
+            dma_translation = "on"
+        - disable_dma_translation:
+            dma_translation = "off"
+        - disable_dma_translation_with_more_vcpus:
+            with_more_vcpus = "yes"
+            dma_translation = "off"
+            eim_dict = {'eim': 'on'}
+            guest_vcpus = 256

libvirt/tests/src/sriov/vIOMMU/intel_iommu_with_dma_translation.py

@@ -0,0 +1,49 @@
+from virttest import virsh
+from virttest import libvirt_version
+from virttest.libvirt_xml import vm_xml
+
+from provider.viommu import viommu_base
+
+
+def run(test, params, env):
+    """
+    Start vm with Intel iommu and dma_translation attribute.
+    """
+    vm_name = params.get("main_vm", "avocado-vt-vm1")
+    vm = env.get_vm(vm_name)
+    dma_translation = params.get("dma_translation")
+    guest_vcpus = params.get("guest_vcpus")
+    eim_dict = eval(params.get("eim_dict", "{}"))
+    iommu_dict = eval(params.get("iommu_dict", "{}") % dma_translation)
+    with_more_vcpus = "yes" == params.get("with_more_vcpus", "no")
+    test_obj = viommu_base.VIOMMUTest(vm, test, params)
+    libvirt_version.is_libvirt_feature_supported(params)
+
+    try:
+        iommu_dict['driver'].update(eim_dict)
+        test.log.info("TEST STEP1: Prepare guest xml with intel iommu device.")
+        test_obj.setup_iommu_test(iommu_dict=iommu_dict)
+        vmxml = vm_xml.VMXML.new_from_dumpxml(vm_name)
+        if with_more_vcpus:
+            vmxml.vcpu = int(guest_vcpus)
+            vmxml.sync()
+        test.log.info("TEST STEP2: Start the guest.")
+        virsh.start(vm_name, debug=True)
+        test.log.debug("The current guest xml ls: %s",
+                       virsh.dumpxml(vm_name).stdout_text)
+        test.log.info("TEST STEP3: Check the message for iommu group and DMA.")
+        vm.cleanup_serial_console()
+        vm.create_serial_console()
+        vm_session = vm.wait_for_serial_login(timeout=6000)
+        dma_status, _ = vm_session.cmd_status_output("dmesg | grep -i 'Not attempting DMA translation'")
+        iommu_status, _ = vm_session.cmd_status_output("dmesg | grep -i 'Adding to iommu group'")
+        if dma_translation == "on" and (not dma_status or iommu_status):
+            test.fail("Can't get expected message result when enabling dma_translation.")
+        if dma_translation == "off" and (dma_status or not iommu_status):
+            test.fail("Can't get expected message result when disabling dma_translation.")
+        if with_more_vcpus:
+            s, o = vm_session.cmd_status_output("cat /proc/cpuinfo | grep processor| wc -l")
+            if int(o) != int(guest_vcpus):
+                test.fail("Can't get expected vCPU number, the actual number is %s" % type(o))
+    finally:
+        test_obj.teardown_iommu_test()