[pve-devel] [PATCH qemu-server v2 5/8] machine: add S3/S4 power state properties

[Dominik Csapak]

So users can disable them (they're enabled by default in QEMU)

Signed-off-by: Dominik Csapak <d.csapak at proxmox.com>
---
changes from v1:
* rework the method with suggestions from fiona
* change way we add flags because we don't have globalflags anymore

 PVE/QemuServer.pm         |  4 ++++
 PVE/QemuServer/Machine.pm | 37 +++++++++++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+)

diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index 1da7e9a1..1aaee8d0 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -3975,6 +3975,10 @@ sub config_to_command {
 	push @$machineFlags, 'accel=tcg';
     }
 
+    if (my $options = PVE::QemuServer::Machine::check_and_set_power_state_flags($machine_conf)) {
+	push $cmd->@*, $options->@*;
+    }
+
     push @$machineFlags, 'smm=off' if should_disable_smm($conf, $vga, $machine_type);
 
     my $machine_type_min = $machine_type;
diff --git a/PVE/QemuServer/Machine.pm b/PVE/QemuServer/Machine.pm
index a5962443..d2349d4d 100644
--- a/PVE/QemuServer/Machine.pm
+++ b/PVE/QemuServer/Machine.pm
@@ -31,6 +31,16 @@ my $machine_fmt = {
 	enum => ['intel', 'virtio'],
 	optional => 1,
     },
+    'enable-s3' => {
+	type => 'boolean',
+	description => "Enables S3 power state. Defaults to true.",
+	optional => 1,
+    },
+    'enable-s4' => {
+	type => 'boolean',
+	description => "Enables S4 power state. Defaults to true.",
+	optional => 1,
+    },
 };
 
 PVE::JSONSchema::register_format('pve-qemu-machine-fmt', $machine_fmt);
@@ -284,4 +294,31 @@ sub check_and_pin_machine_string {
     return print_machine($machine_conf);
 }
 
+# disable s3/s4 by default for 9.2+pve1 machine types
+# returns a list of cmdline options for qemu or undef
+sub check_and_set_power_state_flags {
+    my ($machine_conf) = @_;
+
+    my $object = $machine_conf->{type} && ($machine_conf->{type} =~ m/q35/) ? "ICH9-LPC" : "PIIX4_PM";
+
+    my $s3 = $machine_conf->{'enable-s3'} // 1;
+    my $s4 = $machine_conf->{'enable-s4'} // 1;
+
+    my $options = [];
+
+    # they're enabled by default in QEMU, so only add the flags to disable them
+    if (!$s3) {
+	push $options->@*, '-global', "${object}.disable_s3=1";
+    }
+    if (!$s4) {
+	push $options->@*, '-global', "${object}.disable_s4=1";
+    }
+
+    if (scalar($options->@*)) {
+	return $options;
+    }
+
+    return;
+}
+
 1;
-- 
2.39.5