[PATCH qemu-server 1/3] qemuserver: add pvpanic device

[Kaiyang Wu <wukaiyang2003@gmail.com>]

Add pvpanic device to monitor virtual machine system panics. Add pvpanic
field in virtual machine configuration files, allowing to choose the ISA
or the PCI variant of the pvpanic device.

Signed-off-by: Kaiyang Wu <wukaiyang@loongfans.cn>
---
 src/PVE/API2/Qemu.pm      |  1 +
 src/PVE/QemuServer.pm     | 19 +++++++++++++++++++
 src/PVE/QemuServer/PCI.pm |  1 +
 3 files changed, 21 insertions(+)

diff --git a/src/PVE/API2/Qemu.pm b/src/PVE/API2/Qemu.pm
index 71247eec..933f6221 100644
--- a/src/PVE/API2/Qemu.pm
+++ b/src/PVE/API2/Qemu.pm
@@ -818,6 +818,7 @@ my $hwtypeoptions = {
     'watchdog' => 1,
     'audio0' => 1,
     'rng0' => 1,
+    'pvpanic0' => 1,
 };
 
 my $generaloptions = {
diff --git a/src/PVE/QemuServer.pm b/src/PVE/QemuServer.pm
index 63d8c135..f476af94 100644
--- a/src/PVE/QemuServer.pm
+++ b/src/PVE/QemuServer.pm
@@ -739,6 +739,13 @@ EODESCR
         optional => 1,
         default => 1,
     },
+    pvpanic0 => {
+        optional => 1,
+        type => 'string',
+        description => "Configure a pvpanic device to monitor guest panics",
+        enum => [qw(pvpanic pvpanic-pci)],
+        default => undef,
+    },
 };
 
 my $cicustom_fmt = {
@@ -3415,6 +3422,18 @@ sub config_to_command {
         push @$cmd, '-nographic';
     }
 
+    my $pvpanic = $conf->{pvpanic0};
+    if (defined($pvpanic)) {
+        if ($pvpanic eq 'pvpanic') {
+            push @$devices, '-device', $pvpanic;
+        } elsif ($pvpanic eq 'pvpanic-pci') {
+            my $pvpanicpciaddr = print_pci_addr("pvpanic0", $bridges, $arch);
+            push @$devices, '-device', "$pvpanic,id=pvpanic$pvpanicpciaddr";
+        } else {
+            die "unknown pvpanic device type $pvpanic";
+        }
+    }
+
     # For now, handles only specific parts, but the final goal is to cover everything.
     my $cfg2cmd_opts = { forcemachine => $forcemachine };
     my $cfg2cmd = PVE::QemuServer::Cfg2Cmd->new($conf, $defaults, $version_guard, $cfg2cmd_opts);
diff --git a/src/PVE/QemuServer/PCI.pm b/src/PVE/QemuServer/PCI.pm
index 0b67943c..56770091 100644
--- a/src/PVE/QemuServer/PCI.pm
+++ b/src/PVE/QemuServer/PCI.pm
@@ -220,6 +220,7 @@ sub get_pci_addr_map {
         'pci.4' => { bus => 1, addr => 28 },
         'rng0' => { bus => 1, addr => 29 },
         'pci.2-igd' => { bus => 1, addr => 30 }, # replaces pci.2 in case a legacy IGD device is passed through
+        'pvpanic0' => { bus => 1, addr => 31 },
         'virtio6' => { bus => 2, addr => 1 },
         'virtio7' => { bus => 2, addr => 2 },
         'virtio8' => { bus => 2, addr => 3 },
-- 
2.55.0