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[PATCH v2 23/26] tests/functional: Restrict nexted Aarch64 Xen test to TCG

Philippe Mathieu-Daudé posted 26 patches 4 months, 4 weeks ago
Maintainers: Richard Henderson <richard.henderson@linaro.org>, Paolo Bonzini <pbonzini@redhat.com>, Cameron Esfahani <dirty@apple.com>, Roman Bolshakov <rbolshakov@ddn.com>, Phil Dennis-Jordan <phil@philjordan.eu>, Radoslaw Biernacki <rad@semihalf.com>, Peter Maydell <peter.maydell@linaro.org>, Leif Lindholm <leif.lindholm@oss.qualcomm.com>, "Marc-André Lureau" <marcandre.lureau@redhat.com>, "Daniel P. Berrangé" <berrange@redhat.com>, "Philippe Mathieu-Daudé" <philmd@linaro.org>, John Snow <jsnow@redhat.com>, Cleber Rosa <crosa@redhat.com>, Alexander Graf <agraf@csgraf.de>, Thomas Huth <thuth@redhat.com>, Bernhard Beschow <shentey@gmail.com>, Eric Auger <eric.auger@redhat.com>, "Alex Bennée" <alex.bennee@linaro.org>
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[PATCH v2 23/26] tests/functional: Restrict nexted Aarch64 Xen test to TCG
Posted by Philippe Mathieu-Daudé 4 months, 4 weeks ago 
On macOS this test fails:

  qemu-system-aarch64: mach-virt: HVF does not support providing Virtualization extensions to the guest CPU

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 tests/functional/test_aarch64_xen.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tests/functional/test_aarch64_xen.py b/tests/functional/test_aarch64_xen.py
index 339904221b0..261d796540d 100755
--- a/tests/functional/test_aarch64_xen.py
+++ b/tests/functional/test_aarch64_xen.py
@@ -33,6 +33,7 @@ def launch_xen(self, xen_path):
         """
         Launch Xen with a dom0 guest kernel
         """
+        self.require_accelerator("tcg") # virtualization=on
         self.set_machine('virt')
         self.cpu = "cortex-a57"
         self.kernel_path = self.ASSET_KERNEL.fetch()
-- 
2.49.0
Re: [PATCH v2 23/26] tests/functional: Restrict nexted Aarch64 Xen test to TCG
Posted by Thomas Huth 4 months, 3 weeks ago 
On 20/06/2025 15.07, Philippe Mathieu-Daudé wrote:
> On macOS this test fails:
> 
>    qemu-system-aarch64: mach-virt: HVF does not support providing Virtualization extensions to the guest CPU
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>   tests/functional/test_aarch64_xen.py | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/tests/functional/test_aarch64_xen.py b/tests/functional/test_aarch64_xen.py
> index 339904221b0..261d796540d 100755
> --- a/tests/functional/test_aarch64_xen.py
> +++ b/tests/functional/test_aarch64_xen.py
> @@ -33,6 +33,7 @@ def launch_xen(self, xen_path):
>           """
>           Launch Xen with a dom0 guest kernel
>           """
> +        self.require_accelerator("tcg") # virtualization=on

What about kvm (or xen) as accelerator? Would that work?

  Thomas
Re: [PATCH v2 23/26] tests/functional: Restrict nexted Aarch64 Xen test to TCG
Posted by Philippe Mathieu-Daudé 4 months, 3 weeks ago 
On 23/6/25 10:11, Thomas Huth wrote:
> On 20/06/2025 15.07, Philippe Mathieu-Daudé wrote:
>> On macOS this test fails:
>>
>>    qemu-system-aarch64: mach-virt: HVF does not support providing 
>> Virtualization extensions to the guest CPU
>>
>> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
>> ---
>>   tests/functional/test_aarch64_xen.py | 1 +
>>   1 file changed, 1 insertion(+)
>>
>> diff --git a/tests/functional/test_aarch64_xen.py b/tests/functional/ 
>> test_aarch64_xen.py
>> index 339904221b0..261d796540d 100755
>> --- a/tests/functional/test_aarch64_xen.py
>> +++ b/tests/functional/test_aarch64_xen.py
>> @@ -33,6 +33,7 @@ def launch_xen(self, xen_path):
>>           """
>>           Launch Xen with a dom0 guest kernel
>>           """
>> +        self.require_accelerator("tcg") # virtualization=on
> 
> What about kvm (or xen) as accelerator? Would that work?

IIUC this tests boots a nested Xen guest running at Aarch64 EL2,
and at this point we can only run EL2/EL3 on TCG. HVF and KVM
can not for now (we are working on it).

I don't know if Xen can accelerate EL2, it would need support for
such hardware (like the Apple Silicon M4). Cc'ing Xen folks to
figure it out.
Re: [PATCH v2 23/26] tests/functional: Restrict nexted Aarch64 Xen test to TCG
Posted by Philippe Mathieu-Daudé 4 months, 3 weeks ago 
On 23/6/25 13:59, Philippe Mathieu-Daudé wrote:
> On 23/6/25 10:11, Thomas Huth wrote:
>> On 20/06/2025 15.07, Philippe Mathieu-Daudé wrote:
>>> On macOS this test fails:
>>>
>>>    qemu-system-aarch64: mach-virt: HVF does not support providing 
>>> Virtualization extensions to the guest CPU
>>>
>>> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
>>> ---
>>>   tests/functional/test_aarch64_xen.py | 1 +
>>>   1 file changed, 1 insertion(+)
>>>
>>> diff --git a/tests/functional/test_aarch64_xen.py b/tests/functional/ 
>>> test_aarch64_xen.py
>>> index 339904221b0..261d796540d 100755
>>> --- a/tests/functional/test_aarch64_xen.py
>>> +++ b/tests/functional/test_aarch64_xen.py
>>> @@ -33,6 +33,7 @@ def launch_xen(self, xen_path):
>>>           """
>>>           Launch Xen with a dom0 guest kernel
>>>           """
>>> +        self.require_accelerator("tcg") # virtualization=on
>>
>> What about kvm (or xen) as accelerator? Would that work?
> 
> IIUC this tests boots a nested Xen guest running at Aarch64 EL2,
> and at this point we can only run EL2/EL3 on TCG. HVF and KVM
> can not for now (we are working on it).

I'll update the description with:

   Currently QEMU only support accelerating EL0 and EL1, so features
   requiring EL2 (like virtualization) or EL3 must be emulated with TCG.

> I don't know if Xen can accelerate EL2, it would need support for
> such hardware (like the Apple Silicon M4). Cc'ing Xen folks to
> figure it out.
Re: [PATCH v2 23/26] tests/functional: Restrict nexted Aarch64 Xen test to TCG
Posted by Richard Henderson 4 months, 3 weeks ago 
On 6/20/25 06:07, Philippe Mathieu-Daudé wrote:
> On macOS this test fails:
> 
>    qemu-system-aarch64: mach-virt: HVF does not support providing Virtualization extensions to the guest CPU
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>   tests/functional/test_aarch64_xen.py | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/tests/functional/test_aarch64_xen.py b/tests/functional/test_aarch64_xen.py
> index 339904221b0..261d796540d 100755
> --- a/tests/functional/test_aarch64_xen.py
> +++ b/tests/functional/test_aarch64_xen.py
> @@ -33,6 +33,7 @@ def launch_xen(self, xen_path):
>           """
>           Launch Xen with a dom0 guest kernel
>           """
> +        self.require_accelerator("tcg") # virtualization=on
>           self.set_machine('virt')
>           self.cpu = "cortex-a57"
>           self.kernel_path = self.ASSET_KERNEL.fetch()

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~

Patchew 2.1-devel-b67e4c2

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