Re: [PATCH 4/4] test/avocado: test Linux boot up in x2APIC with userspace local APIC

[Igor Mammedov <imammedo@redhat.com>]

On Tue, 21 Feb 2023 23:05:00 +0700
Bui Quang Minh <minhquangbui99@gmail.com> wrote:

> Simple test to check Linux boot up in x2APIC with userspace local APIC and
> TCG accelerator.

just an idea, while booting linux would give some coverage,
we probably would get much better coverage by using apic test case
from kvm unit test:
  https://gitlab.com/kvm-unit-tests/kvm-unit-tests/-/blob/master/x86/apic.c

> 
> Signed-off-by: Bui Quang Minh <minhquangbui99@gmail.com>
> ---
>  tests/avocado/tcg_x2apic.py | 91 +++++++++++++++++++++++++++++++++++++
>  1 file changed, 91 insertions(+)
>  create mode 100644 tests/avocado/tcg_x2apic.py
> 
> diff --git a/tests/avocado/tcg_x2apic.py b/tests/avocado/tcg_x2apic.py
> new file mode 100644
> index 0000000000..ff4f27017c
> --- /dev/null
> +++ b/tests/avocado/tcg_x2apic.py
> @@ -0,0 +1,91 @@
> +# x2APIC with TCG accelerator tests
> +# Based on intel_iommu.py, INTEL_IOMMU Functional tests
> +#
> +# Copyright (c) Bui Quang Minh <minhquangbui99@gmail.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 import skipIf
> +from avocado_qemu import LinuxTest
> +
> +@skipIf(os.getenv('GITLAB_CI'), 'Running on GitLab')
> +class TCGx2APIC(LinuxTest):
> +    """
> +    :avocado: tags=arch:x86_64
> +    :avocado: tags=distro:fedora
> +    :avocado: tags=distro_version:31
> +    :avocado: tags=machine:q35
> +    :avocado: tags=accel:tcg
> +    :avocado: tags=x2apic
> +    """
> +
> +    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('-device', 'virtio-gpu-pci' + self.IOMMU_ADDON)
> +        self.vm.add_args('-drive',
> +                         'file=%s,if=none,cache=writethrough,id=drv0' % path)
> +
> +    def setUp(self):
> +        super(TCGx2APIC, self).setUp(None, 'virtio-net-pci' + self.IOMMU_ADDON)
> +
> +    def add_common_args(self):
> +        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('tcg')
> +        self.add_common_args()
> +        self.vm.add_args('-accel', 'tcg')
> +        self.vm.add_args('-device', 'intel-iommu,intremap=on,eim=on')
> +        self.vm.add_args('-cpu', 'qemu64,+x2apic')
> +
> +        if custom_kernel is None:
> +            return
> +
> +        kernel_url = self.distro.pxeboot_url + 'vmlinuz'
> +        initrd_url = self.distro.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('dmesg | grep "x2apic enabled"')
> +
> +    def test_physical_x2apic(self):
> +        """
> +        :avocado: tags=physical_x2apic
> +        """
> +
> +        self.common_vm_setup(True)
> +
> +        self.kernel_params = (self.distro.default_kernel_params +
> +                              ' quiet intel_iommu=on x2apic_phys')
> +        self.run_and_check()
> +        self.ssh_command('dmesg | grep "Switched APIC routing to physical x2apic"')
> +
> +    def test_cluster_x2apic(self):
> +        """
> +        :avocado: tags=cluster_x2apic
> +        """
> +
> +        self.common_vm_setup(True)
> +        self.kernel_params = (self.distro.default_kernel_params +
> +                              ' quiet intel_iommu=on')
> +        self.run_and_check()
> +        self.ssh_command('dmesg | grep "Switched APIC routing to cluster x2apic"')