[pve-devel] [PATCH qemu-server 4/7] cpu config: introduce vendor-agnostic 'nested-virt' CPU flag

[Fiona Ebner]

Am 06.11.25 um 6:00 PM schrieb Daniel Kral:
> On Fri Oct 31, 2025 at 1:27 PM CET, Fiona Ebner wrote:
>> @@ -578,8 +588,34 @@ sub print_cpu_device {
>>  sub resolve_cpu_flags {
>>      my $flags = {};
>>  
>> +    my $nested_flag;
>> +    my $nested_flag_resolved;
>> +    my $resolve_nested_flag = sub {
>> +        if (!$nested_flag_resolved) {
>> +            my $host_cpu_flags = PVE::ProcFSTools::read_cpuinfo()->{flags};
>> +            if ($host_cpu_flags =~ m/\s(svm|vmx)\s/) {
>> +                $nested_flag = $1;
>> +            } else {
>> +                log_warn("ignoring 'nested-virt' CPU flag - unable to resolve from host CPU flags");
>> +            }
>> +            $nested_flag_resolved = 1;
>> +        }
>> +        return $nested_flag;
>> +    };
>> +
>>      for my $hash (@_) {
> 
> nit: maybe now's a good time to give @_ a name with the $nested_flag bit
>      in between? But I can see the naming collision with $flags..

That's a good point, perlcritic also has a warning about this:
"Always unpack @_ first"

Will fix in v2.