[PATCH 1/1] avocado_qemu: Add SMMUv3 tests

[Eric Auger <eric.auger@redhat.com>]

Add new tests checking the good behavior of the SMMUv3 protecting
2 virtio pci devices (block and net). We check the guest boots and
we are able to install a package. Different guest configs are tested:
standard, passthrough an strict=0. Given the version of the guest
kernel in use (5.3.7 at this moment), range invalidation is not yet
tested. This will be handled separately.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
 tests/acceptance/smmu.py | 104 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 tests/acceptance/smmu.py

diff --git a/tests/acceptance/smmu.py b/tests/acceptance/smmu.py
new file mode 100644
index 0000000000..65ecac8f1a
--- /dev/null
+++ b/tests/acceptance/smmu.py
@@ -0,0 +1,104 @@
+# SMMUv3 Functional tests
+#
+# Copyright (c) 2021 Red Hat, Inc.
+#
+# Author:
+#  Eric Auger <eric.auger@redhat.com>
+#
+# This work is licensed under the terms of the GNU GPL, version 2 or
+# later.  See the COPYING file in the top-level directory.
+
+import os
+
+from avocado_qemu import LinuxTest, BUILD_DIR
+from avocado.utils import ssh
+
+class SMMU(LinuxTest):
+
+    KERNEL_COMMON_PARAMS = ("root=UUID=b6950a44-9f3c-4076-a9c2-355e8475b0a7 ro "
+                            "earlyprintk=pl011,0x9000000 ignore_loglevel "
+                            "no_timer_check printk.time=1 rd_NO_PLYMOUTH "
+                            "console=ttyAMA0 ")
+    IOMMU_ADDON = ',iommu_platform=on,disable-modern=off,disable-legacy=on'
+    IMAGE = ("https://archives.fedoraproject.org/pub/archive/fedora/"
+             "linux/releases/31/Everything/aarch64/os/images/pxeboot/")
+    kernel_path = None
+    initrd_path = None
+    kernel_params = None
+
+    def set_up_boot(self):
+        path = self.download_boot()
+        self.vm.add_args('-device', 'virtio-blk-pci,bus=pcie.0,scsi=off,' +
+                         'drive=drv0,id=virtio-disk0,bootindex=1,'
+                         'werror=stop,rerror=stop' + self.IOMMU_ADDON)
+        self.vm.add_args('-drive',
+                         'file=%s,if=none,cache=writethrough,id=drv0' % path)
+
+    def setUp(self):
+        super(SMMU, self).setUp(None, 'virtio-net-pci' + self.IOMMU_ADDON)
+
+    def add_common_args(self):
+        self.vm.add_args("-machine", "virt")
+        self.vm.add_args('-bios', os.path.join(BUILD_DIR, 'pc-bios',
+                                      'edk2-aarch64-code.fd'))
+        self.vm.add_args('-device', 'virtio-rng-pci,rng=rng0')
+        self.vm.add_args('-object',
+                         'rng-random,id=rng0,filename=/dev/urandom')
+
+    def common_vm_setup(self, custom_kernel=None):
+        self.require_accelerator("kvm")
+        self.add_common_args()
+        self.vm.add_args("-accel", "kvm")
+        self.vm.add_args("-cpu", "host")
+        self.vm.add_args("-machine", "iommu=smmuv3")
+
+        if custom_kernel is None:
+            return
+
+        kernel_url = self.IMAGE + 'vmlinuz'
+        initrd_url = self.IMAGE + 'initrd.img'
+        self.kernel_path = self.fetch_asset(kernel_url)
+        self.initrd_path = self.fetch_asset(initrd_url)
+
+    def run_and_check(self):
+        if self.kernel_path:
+            self.vm.add_args('-kernel', self.kernel_path,
+                             '-append', self.kernel_params,
+                             '-initrd', self.initrd_path)
+        self.launch_and_wait()
+        self.ssh_command('cat /proc/cmdline')
+        self.ssh_command('dnf -y install numactl-devel')
+
+    def test_smmu(self):
+        """
+        :avocado: tags=accel:kvm
+        :avocado: tags=cpu:host
+        :avocado: tags=smmu
+        """
+
+        self.common_vm_setup()
+        self.run_and_check()
+
+    def test_smmu_passthrough(self):
+        """
+        :avocado: tags=accel:kvm
+        :avocado: tags=cpu:host
+        :avocado: tags=smmu
+        """
+        self.common_vm_setup(True)
+
+        self.kernel_params = self.KERNEL_COMMON_PARAMS + 'iommu.passthrough=on'
+
+        self.run_and_check()
+
+    def test_smmu_nostrict(self):
+        """
+        :avocado: tags=accel:kvm
+        :avocado: tags=cpu:host
+        :avocado: tags=smmu
+        """
+        self.common_vm_setup(True)
+
+        self.kernel_params = self.KERNEL_COMMON_PARAMS + 'iommu.strict=0'
+
+        self.run_and_check()
-- 
2.26.2