[pve-devel] [PATCH qemu-server 3/7] api: add endpoint for querying available cpu flags

[Fiona Ebner]

Am 06.11.25 um 7:01 PM schrieb Thomas Lamprecht:
> Am 31.10.25 um 13:28 schrieb Fiona Ebner:
>> Descriptions and ordering are taken from pve-manager's
>> VMCPUFlagSelector.js. The double quotes in the descriptions were
>> replaced with single quotes to have nicer JSON output.
>>
>> Signed-off-by: Fiona Ebner <f.ebner at proxmox.com>
>> ---
>>  src/PVE/API2/Qemu/CPUFlags.pm   | 45 +++++++++++++++++++
>>  src/PVE/API2/Qemu/Makefile      |  2 +-
>>  src/PVE/QemuServer/CPUConfig.pm | 76 +++++++++++++++++++++++++--------
>>  3 files changed, 105 insertions(+), 18 deletions(-)
>>  create mode 100644 src/PVE/API2/Qemu/CPUFlags.pm
>>
>> diff --git a/src/PVE/API2/Qemu/CPUFlags.pm b/src/PVE/API2/Qemu/CPUFlags.pm
>> new file mode 100644
>> index 00000000..cc06a1d6
>> --- /dev/null
>> +++ b/src/PVE/API2/Qemu/CPUFlags.pm
>> @@ -0,0 +1,45 @@
> 
>> +__PACKAGE__->register_method({
> 
>> +        links => [{ rel => 'child', href => '{flag}' }],
> 
> We do not have any routes below this, is there any benefit of
> declaring the links upfront? OTOH, there's also no real downside
> either IIRC so probably can stay.

I originally copied it from the one for CPU models and then changed it
to 'flag', but later renamed the property to 'name', introducing a
mismatch again. I'll just drop it in v2.

>> diff --git a/src/PVE/QemuServer/CPUConfig.pm b/src/PVE/QemuServer/CPUConfig.pm
>> index e72bdf2f..20e26ee2 100644
>> --- a/src/PVE/QemuServer/CPUConfig.pm
>> +++ b/src/PVE/QemuServer/CPUConfig.pm
>> @@ -161,21 +161,62 @@ my $cpu_vendor_list = {
>>      max => 'default',
>>  };
>>  
>> -my @supported_cpu_flags = (
>> -    'pcid',
>> -    'spec-ctrl',
>> -    'ibpb',
>> -    'ssbd',
>> -    'virt-ssbd',
>> -    'amd-ssbd',
>> -    'amd-no-ssb',
>> -    'pdpe1gb',
>> -    'md-clear',
>> -    'hv-tlbflush',
>> -    'hv-evmcs',
>> -    'aes',
>> -);
>> -my $cpu_flag_supported_re = qr/([+-])(@{[join('|', @supported_cpu_flags)]})/;
>> +our $supported_cpu_flags = [
> 
> I'd slightly prefer keeping this private to the module here and instead add a
> getter method. Doing so reduces the impact for side-effect when some usage side
> would modify this array-ref by accident.

Will do in v2!