[v3,2/3] avocado_qemu: Add SMMUv3 tests

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. This is tested with both fedora 31 and
33. The former uses a 5.3 kernel without range invalidation whereas the
latter uses a 5.8 kernel that features range invalidation.

Signed-off-by: Eric Auger <eric.auger@redhat.com>

---

v1 -> v2:
- removed ssh import
- combined add_command_args() and common_vm_setup()
- moved tags in class' docstring and added tags=arch:aarch64
- use self.get_default_kernel_params()
- added RIL tests with fed33 + introduce new tags
---
 tests/acceptance/smmu.py | 133 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 133 insertions(+)
 create mode 100644 tests/acceptance/smmu.py

Hi,

On 6/21/21 5:08 AM, Eric Auger wrote:
> 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. This is tested with both fedora 31 and
> 33. The former uses a 5.3 kernel without range invalidation whereas the
> latter uses a 5.8 kernel that features range invalidation.
>
> Signed-off-by: Eric Auger <eric.auger@redhat.com>
>
> ---
>
> v1 -> v2:
> - removed ssh import
> - combined add_command_args() and common_vm_setup()
> - moved tags in class' docstring and added tags=arch:aarch64
> - use self.get_default_kernel_params()
> - added RIL tests with fed33 + introduce new tags
> ---
>   tests/acceptance/smmu.py | 133 +++++++++++++++++++++++++++++++++++++++
>   1 file changed, 133 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..bcb5416a56
> --- /dev/null
> +++ b/tests/acceptance/smmu.py
> @@ -0,0 +1,133 @@
> +# 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
> +
> +class SMMU(LinuxTest):
> +    """
> +    :avocado: tags=accel:kvm
> +    :avocado: tags=cpu:host
> +    :avocado: tags=arch:aarch64
> +    :avocado: tags=smmu
> +    """
> +
> +    IOMMU_ADDON = ',iommu_platform=on,disable-modern=off,disable-legacy=on'
> +    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 common_vm_setup(self, custom_kernel=None):
As some tests call `self.common_vm_setup(True)`, I think `custom_kernel` 
should be `True|False`.
> +        self.require_accelerator("kvm")
> +        self.vm.add_args("-machine", "virt")
FYI, if you have the "machine" tag (e.g. "tags=machine:virt") to your 
tests then avocado_qemu will set "-machine" automatically to any created VM.
> +        self.vm.add_args("-accel", "kvm")
> +        self.vm.add_args("-cpu", "host")
> +        self.vm.add_args("-smp", "8")
> +        self.vm.add_args("-m", "4096")

The `avocado_qemu.LinuxTest` provides default values for smp and memory 
which cannot be properly overwritten. The resulting command line will 
have -smp and -m twice.

I created an issue to track that improvement: 
https://gitlab.com/qemu-project/qemu/-/issues/453

> +        self.vm.add_args("-machine", "iommu=smmuv3")
> +        self.vm.add_args("-d", "guest_errors")
> +        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')
> +
> +        if custom_kernel is None:
> +            return
> +
> +        kernel_url = self.get_pxeboot_url() + 'vmlinuz'
> +        initrd_url = self.get_pxeboot_url() + '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')
> +
> +
> +    # 5.3 kernel without RIL #
> +
> +    def test_smmu_noril(self):
> +        """
> +        :avocado: tags=smmu_noril
> +        :avocado: tags=smmu_noril_tests
> +        :avocado: tags=distro_version:31
> +        """
> +        self.common_vm_setup()
> +        self.run_and_check()
> +
> +    def test_smmu_noril_passthrough(self):
> +        """
> +        :avocado: tags=smmu_noril_passthrough
> +        :avocado: tags=smmu_noril_tests
> +        :avocado: tags=distro_version:31

Maybe you should "distro" tag the tests (or better, tag the class), so 
that a readers of this don't need to browse the `LinuxTest` class 
looking for the distro to be used (although it may be clear to some, 
based on the distro_version)...

Thanks for contributing those tests!

- Wainer

> +        """
> +        self.common_vm_setup(True)
> +        self.kernel_params = self.get_default_kernel_params() + ' iommu.passthrough=on'
> +        self.run_and_check()
> +
> +    def test_smmu_noril_nostrict(self):
> +        """
> +        :avocado: tags=smmu_noril_nostrict
> +        :avocado: tags=smmu_noril_tests
> +        :avocado: tags=distro_version:31
> +        """
> +        self.common_vm_setup(True)
> +        self.kernel_params = self.get_default_kernel_params() + ' iommu.strict=0'
> +        self.run_and_check()
> +
> +    # 5.8 kernel featuring range invalidation
> +    # >= v5.7 kernel
> +
> +    def test_smmu_ril(self):
> +        """
> +        :avocado: tags=smmu_ril
> +        :avocado: tags=smmu_ril_tests
> +        :avocado: tags=distro_version:33
> +        """
> +        self.common_vm_setup()
> +        self.run_and_check()
> +
> +    def test_smmu_ril_passthrough(self):
> +        """
> +        :avocado: tags=smmu_ril_passthrough
> +        :avocado: tags=smmu_ril_tests
> +        :avocado: tags=distro_version:33
> +        """
> +        self.common_vm_setup(True)
> +        self.kernel_params = self.get_default_kernel_params() + ' iommu.passthrough=on'
> +        self.run_and_check()
> +
> +    def test_smmu_ril_nostrict(self):
> +        """
> +        :avocado: tags=smmu_ril_nostrict
> +        :avocado: tags=smmu_ril_tests
> +        :avocado: tags=distro_version:33
> +        """
> +        self.common_vm_setup(True)
> +        self.kernel_params = self.get_default_kernel_params() + ' iommu.strict=0'
> +        self.run_and_check()

On 6/28/21 8:27 PM, Wainer dos Santos Moschetta wrote:
> Hi,
>
> On 6/21/21 5:08 AM, Eric Auger wrote:
>> 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. This is tested with both fedora 31
>> and
>> 33. The former uses a 5.3 kernel without range invalidation whereas the
>> latter uses a 5.8 kernel that features range invalidation.
>>
>> Signed-off-by: Eric Auger <eric.auger@redhat.com>
>>
>> ---
>>
>> v1 -> v2:
>> - removed ssh import
>> - combined add_command_args() and common_vm_setup()
>> - moved tags in class' docstring and added tags=arch:aarch64
>> - use self.get_default_kernel_params()
>> - added RIL tests with fed33 + introduce new tags
>> ---
>>   tests/acceptance/smmu.py | 133 +++++++++++++++++++++++++++++++++++++++
>>   1 file changed, 133 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..bcb5416a56
>> --- /dev/null
>> +++ b/tests/acceptance/smmu.py
>> @@ -0,0 +1,133 @@
>> +# 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
>> +
>> +class SMMU(LinuxTest):
>> +    """
>> +    :avocado: tags=accel:kvm
>> +    :avocado: tags=cpu:host
>> +    :avocado: tags=arch:aarch64
>> +    :avocado: tags=smmu
>> +    """
>> +
>> +    IOMMU_ADDON =
>> ',iommu_platform=on,disable-modern=off,disable-legacy=on'
>> +    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 common_vm_setup(self, custom_kernel=None):
> As some tests call `self.common_vm_setup(True)`, I think
> `custom_kernel` should be `True|False`.
OK changed to False
>> +        self.require_accelerator("kvm")
>> +        self.vm.add_args("-machine", "virt")
> FYI, if you have the "machine" tag (e.g. "tags=machine:virt") to your
> tests then avocado_qemu will set "-machine" automatically to any
> created VM.
OK
>> +        self.vm.add_args("-accel", "kvm")
>> +        self.vm.add_args("-cpu", "host")
>> +        self.vm.add_args("-smp", "8")
>> +        self.vm.add_args("-m", "4096")
>
> The `avocado_qemu.LinuxTest` provides default values for smp and
> memory which cannot be properly overwritten. The resulting command
> line will have -smp and -m twice.
>
> I created an issue to track that improvement:
> https://gitlab.com/qemu-project/qemu/-/issues/453
OK removed those params and rely on defaults
>
>> +        self.vm.add_args("-machine", "iommu=smmuv3")
>> +        self.vm.add_args("-d", "guest_errors")
>> +        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')
>> +
>> +        if custom_kernel is None:
>> +            return
>> +
>> +        kernel_url = self.get_pxeboot_url() + 'vmlinuz'
>> +        initrd_url = self.get_pxeboot_url() + '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')
>> +
>> +
>> +    # 5.3 kernel without RIL #
>> +
>> +    def test_smmu_noril(self):
>> +        """
>> +        :avocado: tags=smmu_noril
>> +        :avocado: tags=smmu_noril_tests
>> +        :avocado: tags=distro_version:31
>> +        """
>> +        self.common_vm_setup()
>> +        self.run_and_check()
>> +
>> +    def test_smmu_noril_passthrough(self):
>> +        """
>> +        :avocado: tags=smmu_noril_passthrough
>> +        :avocado: tags=smmu_noril_tests
>> +        :avocado: tags=distro_version:31
>
> Maybe you should "distro" tag the tests (or better, tag the class), so
> that a readers of this don't need to browse the `LinuxTest` class
> looking for the distro to be used (although it may be clear to some,
> based on the distro_version)...
done
>
> Thanks for contributing those tests!
you're welcome

Thanks

Eric
>
> - Wainer
>
>> +        """
>> +        self.common_vm_setup(True)
>> +        self.kernel_params = self.get_default_kernel_params() + '
>> iommu.passthrough=on'
>> +        self.run_and_check()
>> +
>> +    def test_smmu_noril_nostrict(self):
>> +        """
>> +        :avocado: tags=smmu_noril_nostrict
>> +        :avocado: tags=smmu_noril_tests
>> +        :avocado: tags=distro_version:31
>> +        """
>> +        self.common_vm_setup(True)
>> +        self.kernel_params = self.get_default_kernel_params() + '
>> iommu.strict=0'
>> +        self.run_and_check()
>> +
>> +    # 5.8 kernel featuring range invalidation
>> +    # >= v5.7 kernel
>> +
>> +    def test_smmu_ril(self):
>> +        """
>> +        :avocado: tags=smmu_ril
>> +        :avocado: tags=smmu_ril_tests
>> +        :avocado: tags=distro_version:33
>> +        """
>> +        self.common_vm_setup()
>> +        self.run_and_check()
>> +
>> +    def test_smmu_ril_passthrough(self):
>> +        """
>> +        :avocado: tags=smmu_ril_passthrough
>> +        :avocado: tags=smmu_ril_tests
>> +        :avocado: tags=distro_version:33
>> +        """
>> +        self.common_vm_setup(True)
>> +        self.kernel_params = self.get_default_kernel_params() + '
>> iommu.passthrough=on'
>> +        self.run_and_check()
>> +
>> +    def test_smmu_ril_nostrict(self):
>> +        """
>> +        :avocado: tags=smmu_ril_nostrict
>> +        :avocado: tags=smmu_ril_tests
>> +        :avocado: tags=distro_version:33
>> +        """
>> +        self.common_vm_setup(True)
>> +        self.kernel_params = self.get_default_kernel_params() + '
>> iommu.strict=0'
>> +        self.run_and_check()
>