From d14e3f5d974b93d40e89ba56fa005fe6b1042285 Mon Sep 17 00:00:00 2001
From: Julien Escario <julien.escario@altinea.fr>
Date: Wed, 29 Sep 2021 08:41:31 +0200
Subject: [PATCH] Added udev rules file to hot add cpu on QEMU hardware

---
 cloud-init/41-qemu-hot-add-cpu.rules | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 cloud-init/41-qemu-hot-add-cpu.rules

diff --git a/cloud-init/41-qemu-hot-add-cpu.rules b/cloud-init/41-qemu-hot-add-cpu.rules
new file mode 100644
index 0000000..4a2f35e
--- /dev/null
+++ b/cloud-init/41-qemu-hot-add-cpu.rules
@@ -0,0 +1,14 @@
+# On QEMU/KVM machines we want to add memory and cpus as soon as they appear
+# As of 2021-09-29, the file 40-vm-hotadd.rules does exactly the same thing for Xen and Hyper-V
+ATTR{[dmi/id]sys_vendor}=="QEMU", GOTO="vm_hotadd_apply"
+GOTO="vm_hotadd_end"
+
+LABEL="vm_hotadd_apply"
+
+# Memory hotadd request
+SUBSYSTEM=="memory", ACTION=="add", DEVPATH=="/devices/system/memory/memory[0-9]*", TEST=="state", ATTR{state}!="online", ATTR{state}="online"
+
+# CPU hotadd request
+SUBSYSTEM=="cpu", ACTION=="add", DEVPATH=="/devices/system/cpu/cpu[0-9]*", TEST=="online", ATTR{online}!="1", ATTR{online}="1"
+
+LABEL="vm_hotadd_end"