[PATCH v4 2/2] tests/avocado/tuxrun_baselines.py: improve code coverage for ppc64

[Kautuk Consul]

Commit c0c8687ef0fd990db8db1655a8a6c5a5e35dd4bb disabled the
boot_linux.py test-case due to which the code coverage for ppc
decreased by around 2%. As per the discussion on
https://lore.kernel.org/qemu-devel/87sfdpqcy4.fsf@linaro.org/ it
was mentioned that the baseline test for ppc64 could be modified
to make up this 2% code coverage. This patch attempts to achieve
this 2% code coverage by adding various device command line
arguments (to ./qemu-system-ppc64) in the tuxrun_baselines.py
test-case.

The code coverage report with boot_linux.py, without it and finally
with these tuxrun_baselines.py changes is as follows:

With boot_linux.py
------------------
  lines......: 13.8% (58006 of 420997 lines)
  functions..: 20.7% (7675 of 36993 functions)
  branches...: 9.2% (22146 of 240611 branches)
Without boot_linux.py (without this patch changes)
--------------------------------------------------
  lines......: 11.9% (50174 of 420997 lines)
  functions..: 18.8% (6947 of 36993 functions)
  branches...: 7.4% (17580 of 239017 branches)
Without boot_linux.py (with this patch changes)
-----------------------------------------------
  lines......: 13.8% (58287 of 420997 lines)
  functions..: 20.7% (7640 of 36993 functions)
  branches...: 8.4% (20223 of 240611 branches)

Signed-off-by: Kautuk Consul <kconsul@linux.vnet.ibm.com>
Reported-by: Alex Bennée <alex.bennee@linaro.org>
---
 tests/avocado/tuxrun_baselines.py | 68 +++++++++++++++++++++++++++++--
 1 file changed, 64 insertions(+), 4 deletions(-)

diff --git a/tests/avocado/tuxrun_baselines.py 
b/tests/avocado/tuxrun_baselines.py
index d343376faa..546abd9396 100644
--- a/tests/avocado/tuxrun_baselines.py
+++ b/tests/avocado/tuxrun_baselines.py
@@ -11,6 +11,7 @@
 
 import os
 import time
+import tempfile
 
 from avocado import skip, skipIf
 from avocado_qemu import QemuSystemTest
@@ -72,6 +73,8 @@ def setUp(self):
         # Occasionally we need extra devices to hook things up
         self.extradev = self.get_tag('extradev')
 
+        self.qemu_img = super().get_qemu_img()
+
     def wait_for_console_pattern(self, success_message, vm=None):
         wait_for_console_pattern(self, success_message,
                                  failure_message='Kernel panic - not syncing',
@@ -164,6 +167,63 @@ def common_tuxrun(self, dt=None,
         self.vm.launch()
         self.run_tuxtest_tests(haltmsg)
 
+    def ppc64_common_tuxrun(self, prefix):
+        # add device args to command line.
+        self.vm.add_args('-netdev', 'user,id=vnet,hostfwd=:127.0.0.1:0-:22',
+                         '-device', 'virtio-net,netdev=vnet')
+        self.vm.add_args('-netdev', '{"type":"user","id":"hostnet0"}',
+                         '-device', '{"driver":"virtio-net-pci","netdev":'
+                         '"hostnet0","id":"net0","mac":"52:54:00:4c:e3:86",'
+                         '"bus":"pci.0","addr":"0x9"}')
+        self.vm.add_args('-device', '{"driver":"qemu-xhci","p2":15,"p3":15,'
+                         '"id":"usb","bus":"pci.0","addr":"0x2"}')
+        self.vm.add_args('-device', '{"driver":"virtio-scsi-pci","id":"scsi0"'
+                         ',"bus":"pci.0","addr":"0x3"}')
+        self.vm.add_args('-device', '{"driver":"virtio-serial-pci","id":'
+                         '"virtio-serial0","bus":"pci.0","addr":"0x4"}')
+        self.vm.add_args('-device', '{"driver":"scsi-cd","bus":"scsi0.0"'
+                         ',"channel":0,"scsi-id":0,"lun":0,"device_id":'
+                         '"drive-scsi0-0-0-0","id":"scsi0-0-0-0"}')
+        self.vm.add_args('-device', '{"driver":"virtio-balloon-pci",'
+                         '"id":"balloon0","bus":"pci.0","addr":"0x6"}')
+        self.vm.add_args('-audiodev', '{"id":"audio1","driver":"none"}')
+        self.vm.add_args('-device', '{"driver":"usb-tablet","id":"input0"'
+                         ',"bus":"usb.0","port":"1"}')
+        self.vm.add_args('-device', '{"driver":"usb-kbd","id":"input1"'
+                         ',"bus":"usb.0","port":"2"}')
+        self.vm.add_args('-device', '{"driver":"VGA","id":"video0",'
+                         '"vgamem_mb":16,"bus":"pci.0","addr":"0x7"}')
+        self.vm.add_args('-object', '{"qom-type":"rng-random","id":"objrng0"'
+                         ',"filename":"/dev/urandom"}',
+                         '-device', 
'{"driver":"virtio-rng-pci","rng":"objrng0"'
+                         ',"id":"rng0","bus":"pci.0","addr":"0x8"}')
+        self.vm.add_args('-object', '{"qom-type":"cryptodev-backend-builtin",'
+                         '"id":"objcrypto0","queues":1}',
+                         '-device', '{"driver":"virtio-crypto-pci",'
+                         '"cryptodev":"objcrypto0","id":"crypto0","bus"'
+                         ':"pci.0","addr":"0xa"}')
+        self.vm.add_args('-device', '{"driver":"spapr-pci-host-bridge"'
+                         ',"index":1,"id":"pci.1"}')
+        self.vm.add_args('-device', '{"driver":"spapr-vscsi","id":"scsi1"'
+                         ',"reg":12288}')
+        self.vm.add_args('-m', '2G,slots=32,maxmem=4G',
+                         '-object', 'memory-backend-ram,id=ram1,size=1G',
+                         '-device', 'pc-dimm,id=dimm1,memdev=ram1')
+
+        # Create a temporary qcow2 and launch the test-case
+        with tempfile.NamedTemporaryFile(prefix=prefix,
+                                         suffix='.qcow2') as qcow2:
+            process.run(self.qemu_img + ' create -f qcow2 ' +
+                        qcow2.name + ' 1G')
+
+            self.vm.add_args('-drive', 'file=' + qcow2.name +
+                         ',format=qcow2,if=none,id='
+                         'drive-virtio-disk1',
+                         '-device', 'virtio-blk-pci,scsi=off,bus=pci.0,'
+                         'addr=0xb,drive=drive-virtio-disk1,id=virtio-disk1'
+                         ',bootindex=2')
+            self.common_tuxrun(drive="scsi-hd")
+
     #
     # The tests themselves. The configuration is derived from how
     # tuxrun invokes qemu (with minor tweaks like using -blockdev
@@ -308,7 +368,7 @@ def test_ppc64(self):
         """
         :avocado: tags=arch:ppc64
         :avocado: tags=machine:pseries
-        :avocado: tags=cpu:POWER8
+        :avocado: tags=cpu:POWER10
         :avocado: tags=endian:big
         :avocado: tags=console:hvc0
         :avocado: tags=tuxboot:ppc64
@@ -316,20 +376,20 @@ def test_ppc64(self):
         :avocado: tags=extradev:driver=spapr-vscsi
         :avocado: tags=root:sda
         """
-        self.common_tuxrun(drive="scsi-hd")
+        self.ppc64_common_tuxrun(prefix='tuxrun_ppc64_')
 
     def test_ppc64le(self):
         """
         :avocado: tags=arch:ppc64
         :avocado: tags=machine:pseries
-        :avocado: tags=cpu:POWER8
+        :avocado: tags=cpu:POWER10
         :avocado: tags=console:hvc0
         :avocado: tags=tuxboot:ppc64le
         :avocado: tags=image:vmlinux
         :avocado: tags=extradev:driver=spapr-vscsi
         :avocado: tags=root:sda
         """
-        self.common_tuxrun(drive="scsi-hd")
+        self.ppc64_common_tuxrun(prefix='tuxrun_ppc64le_')
 
     def test_riscv32(self):
         """
-- 
2.25.1