[PATCH qemu-server] cpu config: Add 'arch' property to cpu_fmt

[Arthur Bied-Charreton <a.bied-charreton@proxmox.com>]

Preparatory step for adding support for configuring custom CPU types in
the PVE UI.

Add optional property 'arch' (x86_64|aarch64) to cpu_fmt to allow custom
models to indicate which architecture they belong to. 'arch' defaults to
x86_64 for backwards compatibility.

Update get_cpu_models to only return custom models that match the
arch to allow querying custom models for a given host architecture.

Signed-off-by: Arthur Bied-Charreton <a.bied-charreton@proxmox.com>
---
 src/PVE/QemuServer/CPUConfig.pm | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/PVE/QemuServer/CPUConfig.pm b/src/PVE/QemuServer/CPUConfig.pm
index 32ec4954..728c5562 100644
--- a/src/PVE/QemuServer/CPUConfig.pm
+++ b/src/PVE/QemuServer/CPUConfig.pm
@@ -374,6 +374,13 @@ my $cpu_fmt = {
             . " note that doing so will break live migration to CPUs with other values.",
         optional => 1,
     },
+    arch => {
+        type => 'string',
+        enum => [qw(x86_64 aarch64)],
+        default => 'x86_64',
+        description => 'The architecture the CPU model belongs to.',
+        optional => 1,
+    },
 };
 
 my $sev_fmt = {
@@ -612,9 +619,14 @@ sub get_cpu_models {
 
     my $conf = load_custom_model_conf();
     for my $custom_model (keys %{ $conf->{ids} }) {
+        my $custom_model_arch = $conf->{ids}->{$custom_model}->{'arch'};
+        $custom_model_arch //= $cpu_fmt->{'arch'}->{default};
+        next if ($custom_model_arch ne $arch);
+
         my $reported_model = $conf->{ids}->{$custom_model}->{'reported-model'};
         $reported_model //= $cpu_fmt->{'reported-model'}->{default};
         my $vendor = $all_cpu_models->{$reported_model};
+
         push @$models,
             {
                 name => "custom-$custom_model",
-- 
2.47.3