Re: [PATCH v3 20/29] tests/functional: extend test_aarch64_virt with vulkan test

[Thomas Huth]

On 07/01/2025 17.51, Alex Bennée wrote:
> Now we have virtio-gpu Vulkan support lets add a test for it.

I'm not a native speaker, but maybe rather:

Now that we have virtio-gpu Vulkan support, let's add a test for it.

?

...
> diff --git a/tests/functional/test_aarch64_virt.py 
> b/tests/functional/test_aarch64_virt.py
> index 2d9995a95d..bb68048537 100755
> --- a/tests/functional/test_aarch64_virt.py
> +++ b/tests/functional/test_aarch64_virt.py
> @@ -13,11 +13,14 @@
>   import logging
>   from subprocess import check_call, DEVNULL
>   
> +from qemu.machine.machine import VMLaunchFailure
> +
> +from qemu_test import BUILD_DIR
>   from qemu_test import QemuSystemTest, Asset
> -from qemu_test import exec_command_and_wait_for_pattern
> +from qemu_test import exec_command, exec_command_and_wait_for_pattern
>   from qemu_test import wait_for_console_pattern
>   from qemu_test import get_qemu_img
> -
> +from qemu_test import skipIfMissingCommands, get_qemu_img
>   

Daniel recently tried to standardize two empty lines between the import and 
class statements, so could you please keep the empty line here?

>   class Aarch64VirtMachine(QemuSystemTest):
>       KERNEL_COMMON_COMMAND_LINE = 'printk.time=0 '
> @@ -73,15 +76,16 @@ def common_aarch64_virt(self, machine):
>           Common code to launch basic virt machine with kernel+initrd
>           and a scratch disk.
>           """
> +        self.set_machine('virt')
> +        self.require_accelerator("tcg")

Thanks for moving this to the beginning of the function!

>           logger = logging.getLogger('aarch64_virt')
>   
>           kernel_path = self.ASSET_KERNEL.fetch()
>   
> -        self.set_machine('virt')
>           self.vm.set_console()
>           kernel_command_line = (self.KERNEL_COMMON_COMMAND_LINE +
>                                  'console=ttyAMA0')
> -        self.require_accelerator("tcg")
>           self.vm.add_args('-cpu', 'max,pauth-impdef=on',
>                            '-machine', machine,
>                            '-accel', 'tcg',
> @@ -102,7 +106,9 @@ def common_aarch64_virt(self, machine):
>   
>           # Add the device
>           self.vm.add_args('-blockdev',
> -                         
> f"driver=qcow2,file.driver=file,file.filename={image_path},node-name=scratch")
> +                         "driver=qcow2,file."
> +                         "driver=file,file."

The line breaks look weird here. I'd rather start a new line after the 
comma, not after the dot...? (also the changes look rather unrelated to the 
patch subject?)

> +                         f"filename={image_path},node-name=scratch")
>           self.vm.add_args('-device',
>                            'virtio-blk-device,drive=scratch')
>   
> @@ -131,5 +137,73 @@ def test_aarch64_virt_gicv2(self):
>           self.common_aarch64_virt("virt,gic-version=2")
>   
>   
> +    ASSET_VIRT_GPU_KERNEL = Asset(
> +        'https://fileserver.linaro.org/s/ce5jXBFinPxtEdx/'
> +        'download?path=%2F&files='
> +        'Image',
> +        '89e5099d26166204cc5ca4bb6d1a11b92c217e1f82ec67e3ba363d09157462f6')
> +
> +    ASSET_VIRT_GPU_ROOTFS = Asset(
> +        'https://fileserver.linaro.org/s/ce5jXBFinPxtEdx/'
> +        'download?path=%2F&files='
> +        'rootfs.ext4.zstd',
> +        '792da7573f5dc2913ddb7c638151d4a6b2d028a4cb2afb38add513c1924bdad4')
> +
> +    @skipIfMissingCommands('zstd')
> +    def test_aarch64_virt_with_gpu(self):
> +        # This tests boots with a buildroot test image that contains
> +        # vkmark and other GPU exercising tools. We run a headless
> +        # weston that nevertheless still exercises the virtio-gpu
> +        # backend.
> +
> +        self.set_machine('virt')
> +        self.require_accelerator("tcg")
> +
> +        kernel_path = self.ASSET_VIRT_GPU_KERNEL.fetch()
> +        image_path = self.uncompress(self.ASSET_VIRT_GPU_ROOTFS, format="zstd")
> +
> +        self.vm.set_console()
> +        kernel_command_line = (self.KERNEL_COMMON_COMMAND_LINE +
> +                               'console=ttyAMA0 root=/dev/vda')
> +
> +        self.vm.add_args("-accel", "tcg")
> +        self.vm.add_args("-cpu", "neoverse-v1,pauth-impdef=on")
> +        self.vm.add_args("-machine", "virt,gic-version=max",
> +                         '-kernel', kernel_path,
> +                         '-append', kernel_command_line)
> +        self.vm.add_args("-smp", "2", "-m", "2048")
> +        self.vm.add_args("-device",
> +                         "virtio-gpu-gl-pci,hostmem=4G,blob=on,venus=on")
> +        self.vm.add_args("-display", "egl-headless")
> +        self.vm.add_args("-display", "dbus,gl=on")
> +        self.vm.add_args("-device", "virtio-blk-device,drive=hd0")
> +        self.vm.add_args("-blockdev",
> +                         "driver=raw,file.driver=file,"
> +                         "node-name=hd0,read-only=on,"
> +                         f"file.filename={image_path}")
> +        self.vm.add_args("-snapshot")
> +
> +        try:
> +            self.vm.launch()
> +        except VMLaunchFailure as excp:
> +            if "old virglrenderer, blob resources unsupported" in excp.output:
> +                self.skipTest("No blob support for virtio-gpu")
> +            elif "old virglrenderer, venus unsupported" in excp.output:
> +                self.skipTest("No venus support for virtio-gpu")
> +            else:
> +                self.log.info("unhandled launch failure: {excp.output}")
> +                raise excp
> +
> +        self.wait_for_console_pattern('buildroot login:')
> +        exec_command(self, 'root')
> +        exec_command(self, 'export XDG_RUNTIME_DIR=/tmp')
> +        exec_command_and_wait_for_pattern(self,
> +                                          "weston -B headless "
> +                                          "--renderer gl "
> +                                          "--shell kiosk "
> +                                          "-- vkmark -b:duration=1.0",
> +                                          "vkmark Score")

The new test looks fine to me!

 Thomas