and retroactively add descriptions for previous bumps.

Signed-off-by: Dominik Csapak <d.csa...@proxmox.com>
---
new in v2
 PVE/API2/Qemu/Machine.pm  |  9 +++++++++
 PVE/QemuServer/Machine.pm | 15 +++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/PVE/API2/Qemu/Machine.pm b/PVE/API2/Qemu/Machine.pm
index 11eba34b..d9aaa6af 100644
--- a/PVE/API2/Qemu/Machine.pm
+++ b/PVE/API2/Qemu/Machine.pm
@@ -46,6 +46,11 @@ __PACKAGE__->register_method({
                    type => 'string',
                    description => "The machine version.",
                },
+               description => {
+                   type => 'string',
+                   optional => 1,
+                   description => 'Notable changes that version introduces, 
only used for +pveX versions.',
+               },
            },
        },
     },
@@ -67,6 +72,10 @@ __PACKAGE__->register_method({
                        version => $version,
                    };
 
+                   if (my $description = 
PVE::QemuServer::Machine::get_pve_version_description($version)) {
+                       $entry->{description} = $description;
+                   }
+
                    push $to_add->@*, $entry;
                }
            }
diff --git a/PVE/QemuServer/Machine.pm b/PVE/QemuServer/Machine.pm
index 9864d401..f4b2d099 100644
--- a/PVE/QemuServer/Machine.pm
+++ b/PVE/QemuServer/Machine.pm
@@ -15,6 +15,21 @@ our $PVE_MACHINE_VERSION = {
     '9.2' => 1,
 };
 
+# When bumping the pveX version, add a description why.
+my $PVE_MACHINE_VERSION_DESCRIPTIONS = {
+    '4.1+pve1' => 'Introduction of pveX versioning, no changes.',
+    '4.1+pve2' => 'Increases supported SCSI drive count.',
+    '9.2+pve1' => 'Disables S3/S4 power states.',
+};
+
+# returns the description of a given machine version with pve version, e.g. 
9.2+pve1 or undef if
+# there is none
+sub get_pve_version_description {
+    my ($version) = @_;
+
+    return $PVE_MACHINE_VERSION_DESCRIPTIONS->{$version};
+}
+
 my $machine_fmt = {
     type => {
        default_key => 1,
-- 
2.39.5



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